[Mjpeg-users] DivX to VCD
Hi, Im trying to convert a DivX File to VCD Iv been trying to use mjpegstools but I dont seem to be able to... I am hoping that MJPEGTOOLS can do it, but if they cant then can someone please let me know what to use... Iv tryed using both studio and command line, when doing it I get this error on both (this is from command line): [jacob@raptor tempimgs]$ lav2wav -I Maverick.avi | mp2enc -V -o sound.mpg ++ WARN: [lav2wav] Input file Maverick.avi is not in JPEG 4:2:2 or 4:2:0 format**ERROR: [lav2wav] File Maverick.avi has 23.976000 frames/sec, choose norm with +[np] param **ERROR: [mp2enc] EOF in WAV header **ERROR: [mp2enc] failure reading WAV file Im just wondering if someone can please tell me how to fix it. Thanks Jacob Visser signature.asc Description: This is a digitally signed message part
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
On Sun, Jan 19, 2003 at 07:36:08AM +0100, Bernhard Praschinger wrote: Hello ;-) > As I wrote in the mail shortly before you should not use the -M switch > (or any other spliting by mplex). If you multiplex a DVD the -M switch > was deactivated because it generated several files. The -M option does > not generate valid MPEG streams. > > You should use the -S -B option of mpeg2enc for spliting videos. Does that mean I could split some of my really big mpeg2 files with that option (I don't want to recode it...)? Thank you very much, Grégoire http://ulima.unil.ch/greg ICQ:16624071 mailto:[EMAIL PROTECTED] --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] mplex with seek
Hello, The video is encoded by the broadcaster, not me. I have a digital TV receiver connected to a PC which has software which can record the digital TV MPEG2 stream to its hard disk. With a quick demux/remux the recordings can be put onto DVD with no MPEG transcoding at all, i.e. the DVD contains the original broadcast MPEG2 video and MP2 audio. The trouble is that the PC software uses an ordinary clock timer to start and stop the recording, like a normal VHS VCR, so there is usually extra unwanted video at the start and end. The mplex tool lets you chop unwanted material off the end with the -l option but I can't find a way to have the multiplexed output start from seconds into the streams being muxed. The fact that mplex can segment the input streams into multiple standalone muxed files (e.g. for splitting across CDs) demonstrates that the principle is possible. For me there is no problem with the "edit" being done on GOP boundaries (as I guess happens with the existing segmentation facility), I don't need frame-accurate editing. All I am looking to do is to archive my favourite programmes to DVD instead of VHS, nothing any more sophisticated, so no intelligent mid-GOP sequence start is required. Any help/direction would be very much appreciated. Regards, Tim Hewett. On Sunday, Jan 19, 2003, at 06:21 Europe/London, Bernhard Praschinger wrote: Hallo I am wondering if there is a way to use mplex such that it starts from seconds into the audio and video sources given to it. At present it can be made to mplex seconds of material from the start of the audio and video sources but is there a way to perform a simple kind of editing to cut superfluous material from both the start and end? No. You should edit the video BEFORE encoding it. Some have tired writing a programm to edit MPEG streams. But it does not work reliable. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] DivX to VCD
On Sunday 19 Jan 2003 09:36, Jacob Visser wrote: > Im trying to convert a DivX File to VCD Iv been trying to use > mjpegstools but I dont seem to be able to... > I am hoping that MJPEGTOOLS can do it, but if they cant then can someone > please let me know what to use... Mjpegtools only handles MJPEG-encoded AVIs. You need to use mencoder (www.mplayerhq.hu) or transcode (www.Theorie.Physik.UNI-Goettingen.DE/~ostreich/transcode/). There are probably other options too. Stephen --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
[Mjpeg-users] Adobe Premiere
This is bordering on flamebait, but... :o) Has anyone used the output of the MJPEG tools as input to Adobe Premiere? Other than as an already encoded mpg or avi that is? -- Australian Linux Technical Conference 2003: http://www.linux.conf.au/ Explain to your boss the benefits of you going... --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] mplex with seek
Hallo > The video is encoded by the broadcaster, not me. I have > a digital TV receiver connected to a PC which has software > which can record the digital TV MPEG2 stream to its hard > disk. With a quick demux/remux the recordings can be put onto So you have a signal from a digital satelite ? [...] > For me there is no problem with the "edit" being done on GOP > boundaries (as I guess happens with the existing segmentation > facility), I don't need frame-accurate editing. All I am looking to > do is to archive my favourite programmes to DVD instead of > VHS, nothing any more sophisticated, so no intelligent mid-GOP > sequence start is required. Then you might be interrested in gopchop: http://outflux.net/unix/software/GOPchop/ As far I know the programm works well if you have a SW player. It works not good with HW-devices. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
Hallo > > As I wrote in the mail shortly before you should not use the -M switch > > (or any other spliting by mplex). If you multiplex a DVD the -M switch > > was deactivated because it generated several files. The -M option does > > not generate valid MPEG streams. > > > > You should use the -S -B option of mpeg2enc for spliting videos. > > Does that mean I could split some of my really big mpeg2 files with that > option (I don't want to recode it...)? When you encode the video you should use the -S -B option. Then mplex will split the file when multiplexing into pices with a correct start and end. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
On Sat, 18 Jan 2003, Steven Boswell wrote:
>
> OK, cool. mplex generated one big file, and a warning that said
> "Sequence end marker found in video stream but single-segment splitting
> specified!" for every chapter mark.
Just a gues: Make sure you're using a command line that has a template for
the filename. For example:
mplex -f 8 -o MyDVD_%02d.mpeg audio.mp2 video.m2v
Note the %02d that lets mplex number the files and give them unique names.
If you don't have that in there, it can't split the files.
> I burned it to DVD, and there were
> no chapters. I then hacked mplex so that -M wasn't automatically turned
> on by "-f 8", and burned those separate videos to one DVD; that gave me
> chapters, but there's a tiny audio hiccup between each track now.
Try the above and leave the -M option alone. According to the man page,
using -M on DVD stuff may cause audio/video sync problems.
> Pretty neat that I can burn MPEG-2 video to a DVD, and that it works in
> my player; as far as I can tell, that's not "standard", i.e. I think
> the audio is supposed to be uncompressed 48kHz PCM.
mp2 works fine also.
> Now that I can actually see my video, I have a new problem -- although
> most of it looks wonderful, parts of it don't look all that good!
> There's quite a bit of fuzziness at the boundaries between black areas
> and light areas (i.e. I've seen it with white and pink).
Depending on how bright your screen is, you may not be able to get rid of
all the block noise in dark areas. Once you get used to looking for it,
you'll notice it in digital satellite broadcasts and commercial DVD's too
(though it's not as bad on commercial DVD's, but they get two layers of
bandwidth to play with.) I just turn the brightness down a tad on the TV
and they look fantastic. (This is not a slam at the mjpegtools -- they
are far and away the best MPEG encoder I've tried.)
> Here's the command line that I used to generate the video:
>
> lav2yuv -v 0 -A 1:1 -P 4:3 movie.eli \
> | yuvscaler -v 0 -n n -I ACTIVE_690x480+12+0 \
> | mpeg2enc -v 0 -f 8 -b 5000 -B 305 -S frames.txt -V 224 \
> -h -4 1 -2 1 -s -r 16 -q 4 -a 2 -F 4 -n n -o video.m2v
>
> Can anyone see anything especially broken about it?
Your bitrate isn't high enough for that q setting, especially if you have
a noisy signal. Here's the script I use for high quality DVD
encoding from very good quality VHS sources after capturing them to DV.
Yours will look a little different since you're using eli files, but the
idea is the same. This produces very good results (hard to tell it from a
commercial DVD) on good sources, and will fit a two hour movie on a
single 4.7G DVD. For poor quality sources, you'll probably need to take
"q" up to 5 or 6, and "-b" down to some smaller number to make it fit on
a DVD. Don't get hung up on the -q setting -- you'll still get very good
results with it higher -- the bitrate has a lot to do with it.
--- script starts here -
#! /bin/sh
# Usage is "smil2dvd MyEditList.smil"
mkfifo stream.yuv
mkfifo video.yuv
smil2yuv -a "${1%.smil}.mp2" "$1" >stream.yuv &
cat stream.yuv | yuvdenoise -S 0 -b 4,4,696,468 | y4mshift -n 8 >video.yuv &
cat video.yuv | mpeg2enc -S 400 -B 384 -q 4 -b 1 -f 8 -r 16 \
-4 4 -2 4 -N -I 1 -o "${1%.smil}.m2v" -v 1
mplex -f 8 -o "${1%.smil}_%02d.mpeg" "${1%.smil}.mp2" "${1%.smil}.m2v"
rm -f stream.yuv video.yuv "${1%.smil}.mp2" "${1%.smil}.m2v"
--- script ends here ---
--
Robert Kesterson
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Re: [Mjpeg-users] DivX to VCD
On 19 Jan 2003, Jacob Visser wrote: > > Im trying to convert a DivX File to VCD Iv been trying to use > mjpegstools but I dont seem to be able to... Using mjpegtools in conjunction with mplayer is *the* way to go for this. Go the mjpegtools page on sourceforge and search the mailing list for "mplayer -vo yuv4mpeg" (use the "require all words" option on the search results) and you'll find a lot of info, including this url with a script that you can use for SVCD, and with minor mods to VCD: http://sourceforge.net/mailarchive/message.php?msg_id=2694946 -- Robert Kesterson [EMAIL PROTECTED] --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
On Sun, Jan 19, 2003 at 02:53:40PM +0100, Bernhard Praschinger wrote: > When you encode the video you should use the -S -B option. Then mplex > will split the file when multiplexing into pices with a correct start > and end. As there is no -B option in the released mplex, I assume you are talking about the CVS... I can't compil it on my computer, but on another, mplex still has no -B option??? I don't use any encoding tools: I record directly in mpeg2 format and I demux with ds.jar, and use mplex to mux the files together ;-) Wouldn't it be easyer to add an option to mplex like this: mplex -f 8 -B -S 400 -o file%02d.mpg /video2/*.* Or is there a way to split correctly after? Thank you very much, Grégoire http://ulima.unil.ch/greg ICQ:16624071 mailto:[EMAIL PROTECTED] --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Fixed I-frame location
On Sunday 19 Jan 2003 5:53 am, Markus Plail wrote: > Hi there! > > In order to be able to use 'mpeg2enc'oded streams in IfoEdit it is > necessary to have fixed I-frame location (from what I understand). One > can create a template for TMPEnc which looks like that: > > ... > 61269,I > 61281,I > 61293,I > 61305,I > 61317,I > 61329,I > 61341,I > 61353,I > 61365,I > ... > > Would it be possible to change mpeg2enc to only place I-frames at > certain locations? Not sure what you mean by "location". Do you mean I-frames must aligned at sector boundaries in the multiplexed stream? This is already done automatically. Do you mean the GOPs (Groups-Of-Pictures) must have a fixed size and B/P frame structure? Again, what you need is probably already there. However, I'm puzzled why Ifoedit would demand fixed-size/structure GOPs. It is as far as I'm aware definately *not* something required in the DVD standard... Andrew --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] mplex with seek
> The video is encoded by the broadcaster, not me. I have > a digital TV receiver connected to a PC which has software > which can record the digital TV MPEG2 stream to its hard > disk. I've got one myself... a huge leap forward over analog stuff... >With a quick demux/remux the recordings can be put onto > DVD with no MPEG transcoding at all, i.e. the DVD contains > the original broadcast MPEG2 video and MP2 audio. This is not always going to work as DVB allows higher peak bitrates than DVD. >The > trouble is that the PC software uses an ordinary clock timer to > start and stop the recording, like a normal VHS VCR, so there > is usually extra unwanted video at the start and end. The > mplex tool lets you chop unwanted material off the end with > the -l option but I can't find a way to have the multiplexed > output start from seconds into the streams being muxed. > The fact that mplex can segment the input streams into multiple > standalone muxed files (e.g. for splitting across CDs) > demonstrates that the principle is possible. Chuckle... if only it were so simple Half the code-complexity in mplex relates managing run-in / run-out correctly for (S)VCD and and it gets a lot of help from the *encoder* which helpfully places end-of-sequence markers to indicate where a clean split can take place. Anyway, what is possible is that you can cleanly split at *closed* GOPs (one where the initial frames do not refer to the previous GOP. It would not be hard to modify mplex to spot the nearest closed GOP to a specified start-time and start multiplexing from there. I'll see what I can do over the next couple of days. Aside: if you can send me the commands you're using for splitting your DVB files (VDR .vdr's?) I can check it all works myself. Andrew --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Fixed I-frame location
* Andrew Stevens writes: >On Sunday 19 Jan 2003 5:53 am, Markus Plail wrote: >>In order to be able to use 'mpeg2enc'oded streams in IfoEdit it is >>necessary to have fixed I-frame location (from what I understand). One >>can create a template for TMPEnc which looks like that: >> >>... >>61269,I >>61281,I >>61293,I >>61305,I >>61317,I >>61329,I >>61341,I >>61353,I >>61365,I >>... >> >>Would it be possible to change mpeg2enc to only place I-frames at >>certain locations? >Not sure what you mean by "location". Do you mean I-frames must >aligned at sector boundaries in the multiplexed stream? This is >already done automatically. Do you mean the GOPs (Groups-Of-Pictures) >must have a fixed size and B/P frame structure? Again, what you need >is probably already there. What I think it means that frame #61269 has to be an I-frame, and there should be no other I-frame until frame #61281, which is the next I-frame. This seems to be needed in order to remux a MPEG2 video stream to a valid DVD structure and to not have sync issues. >However, I'm puzzled why Ifoedit would demand fixed-size/structure >GOPs. It is as far as I'm aware definately *not* something required in >the DVD standard... Definitely true, but I do not author a completely new DVD, but I want to remux the the video together with the existing (dts/AC3) streams. And with a normal m2v file (produced by either TMPGEnc or mpeg2enc) I have stuttering sound. regards Markus --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] mplex with seek
On Sunday, Jan 19, 2003, at 15:06 Europe/London, Andrew Stevens wrote: This is not always going to work as DVB allows higher peak bitrates than DVD. Fortunately digital TV in the UK complies to DVD's 720x572 PAL resolution standard and bit rates tend to average around 4mbit for the best quality channels. I saw 7mbit as a peak once but that's still ok for DVD. We don't have HDTV in the UK, much to the chagrin of some enthusiasts and the balance tends to lean towards more channels at the expense of picture quality (or having cleverer video codecs at the "stream head"). The only real compatibility issue between broadcast MPEG2 and DVD is that a broadcast transport stream allows the aspect ratio to change on any I-frame boundary, something DVD doesn't allow within an individual disk title. This is not an insurmountable problem though. The trouble is that the PC software uses an ordinary clock timer to start and stop the recording, like a normal VHS VCR, so there is usually extra unwanted video at the start and end. The mplex tool lets you chop unwanted material off the end with the -l option but I can't find a way to have the multiplexed output start from seconds into the streams being muxed. The fact that mplex can segment the input streams into multiple standalone muxed files (e.g. for splitting across CDs) demonstrates that the principle is possible. Chuckle... if only it were so simple Half the code-complexity in mplex relates managing run-in / run-out correctly for (S)VCD and and it gets a lot of help from the *encoder* which helpfully places end-of-sequence markers to indicate where a clean split can take place. Anyway, what is possible is that you can cleanly split at *closed* GOPs (one where the initial frames do not refer to the previous GOP. It would not be hard to modify mplex to spot the nearest closed GOP to a specified start-time and start multiplexing from there. I'll see what I can do over the next couple of days. Thanks very much indeed. In return I shall point you towards my own contribution to the free software community, an app which lets you backup to DV camcorders. There's already something similar for Linux on sourceforge but this is for MacOS X (my platform) in case that suits you at all. Check out: http://www.versiontracker.com/dyn/moreinfo/macosx/17840 if interested. Aside: if you can send me the commands you're using for splitting your DVB files (VDR .vdr's?) I can check it all works myself. The PVR s/w runs on PCs only but it records to a format which seems to be referred to as "PVA". A free PC tool called PVAStrumento lets you demux this, and it stores the results on my Mac's hard drive. It also fixes any errors which occurred while the transport stream was being received. I then do "mplex -V -f 8 -o output.mpg input.mpv input.mpa" then use dvdauthor tools ifogen and tocgen to create the VIDEO_TS. That's it. If there's a Unix tool which can replace PVAStrumento that would be even better since the PVR s/w could then record straight over the wire to the Mac (which has a useful 80GB hard drive) and spare me the "Uncle Bill" experience. :-) It would let me script the process too... Andrew Regards, Tim. --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] mplex with seek
On Sunday, Jan 19, 2003, at 13:47 Europe/London, Bernhard Praschinger wrote: Hallo The video is encoded by the broadcaster, not me. I have a digital TV receiver connected to a PC which has software which can record the digital TV MPEG2 stream to its hard disk. With a quick demux/remux the recordings can be put onto So you have a signal from a digital satelite ? Yes, well almost. Here in the UK we have digital terrestrial TV as well as digital satellite. The transport streams are still basically the same, complying to DVB. I have a box which is basically a domestic receiver for a TV but it has a USB port and PVR software. See the DEC2000-t at http://www.hauppauge.co.uk if interested. For me there is no problem with the "edit" being done on GOP boundaries (as I guess happens with the existing segmentation facility), I don't need frame-accurate editing. All I am looking to do is to archive my favourite programmes to DVD instead of VHS, nothing any more sophisticated, so no intelligent mid-GOP sequence start is required. Then you might be interrested in gopchop: http://outflux.net/unix/software/GOPchop/ As far I know the programm works well if you have a SW player. It works not good with HW-devices. Thanks very much, I will try that. auf hoffentlich bald, Berni the Chaos of Woodquarter Regards, Tim. --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] jumping effect in encoded (svcd) videos...
On Thu, 16 Jan 2003 20:03:45 +0100 Andrew Stevens <[EMAIL PROTECTED]> wrote: > Hmmm the best thing to do would be to try the latest on the stable branch > from CVS. Follow the instructions on the mjpeg.sourceforget.net website > (CVS section) but add the flag: > > -r MJPEGTOOLS_1_6_STABLE > > to the checkout command. I did it, but the effect doesn't go away, allthough it seems, that it occurs not so often ( every 1..3 minutes vs every few seconds). I have seem home made svcd on my player, which are playing correctly, so there still might be a little bug in the multiplexing. regard, Michael --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] DivX to VCD
Hi - > From: Robert Kesterson <[EMAIL PROTECTED]> > On 19 Jan 2003, Jacob Visser wrote: > > > > Im trying to convert a DivX File to VCD Iv been trying to use > > mjpegstools but I dont seem to be able to... > > Using mjpegtools in conjunction with mplayer is *the* way to go for this. I've done this and it works ok BUT there's a small problem with mplayer's y4m output. The frame rate can show up in the YUV4MPEG2 header as something like: F29969900:100 which mjpegtools do not now what to do with. It's necessary to specify the framerate using the -F option to mpeg2enc Cheers, Steven Schultz [EMAIL PROTECTED] --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
>>It uses dd to write to a DVD?? WHOA :-) But it >>just worked; I have my first chaptered DVD-video. Thanks a >>bazillion!!! > >If you tried to tell a joke, I didn't get it. I was just surprised that an ancient, low-tech program like dd is all it takes to do a modern, high-tech action like burning a DVD. Given how much hassle cdrecord goes through just to burn a CD, it just seemed really counterintuitive. :-) >As I wrote in the mail shortly before you should not use the -M switch >(or any other spliting by mplex). If you multiplex a DVD the -M switch >was deactivated because it generated several files. The -M option does >not generate valid MPEG streams. > >You should use the -S -B option of mpeg2enc for spliting videos. I don't understand. The -S option of mpeg2enc doesn't actually seem to produce separate files, just sequence-end marks; from my experience, only mplex actually splits videos into separate files. Also, I deactivated the -M switch: the standard 1.6.0 sources set opt_multifile_segment to true for the DVD format; this is in OutputStream::InitSyntaxParameters(), in multplex.cc. I'm sorry for being so clueless; I really *am* trying to understand all this. :-) >>Here's the command line that I used to generate the video: > >Drop the -b option, raise the -q to 7-8, and use the denoiser. But if I drop the -b option, I'll get 7500 kbps, and then the video won't fit onto the DVD. Also, you really think I need to use the denoiser on a high-quality S-Video source like a LaserDisc? Steven Boswell [EMAIL PROTECTED] --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
> From: Steven Boswell <[EMAIL PROTECTED]>
> >You should use the -S -B option of mpeg2enc for spliting videos.
>
> I don't understand. The -S option of mpeg2enc doesn't actually seem to
> produce separate files, just sequence-end marks; from my experience,
> only mplex actually splits videos into separate files. Also, I
Right, so give a printf-like name to mplex thus:
mplex ... -o foo-%d.mpg foo.m2v foo.mp2
and mplex will use the -S points set by mpeg2enc and create multiple
files called "foo-1.mpg foo-2.mpg ..."
> But if I drop the -b option, I'll get 7500 kbps, and then the video
Use a -q of 6 or perhaps 8 *and* add the -N option to mpeg2enc's
usage. I've found that the mild high frequency reduction from -N
does wonders for the average bitrate.
> won't fit onto the DVD. Also, you really think I need to use the
> denoiser on a high-quality S-Video source like a LaserDisc?
Yes. The settings do not need to be as aggressive as for VHS
sources but going thru the denoiser will help a lot. Try "-l 1" or
perhaps "-l 2" to yuvdenoise (and perhaps raise the search radius
with "-r 16" or "-r 24").Also remember to black out any noise/junk
(if any) at the edges ('-b ...' to yuvdenoise or ACTIVE_* to yuvscaler).
If you're coming from S-Video (analog) then I've found that using
704x480 (which is the NTSC frame size) instead of 720x480 (which has
an extra 8 pixels on each side) can save ~2% on the bitrate (fewer
pixels to encode of course :)). You can make sure that the frame is
centered by using the 'y4mshift' program (in the development version
of mjpegtools for certain, I'm not sure if it's in the 1.6.x release
version).
Good Luck!
Steven Schultz
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[Mjpeg-users] lav_read_audio: how many samples for ONE frame?
Hi, i try to do some video and audio effects on some AVI streams, i have some questions related to that, it would be great if someone could give me some hints. I just sampled an AVI stream with lavrec, audio in 16 bits, 1 channel, audio rate is 11025. When i open that stream and read out the informations in it i get: Video frames: 438 Video rate: 25.0 frames per second Audio channels: 1 Audio Bits: 16 Audio Rate: 11025 Audio Samples: 192413 I try to check the audio sample number now: 438*11025/25 is 193158, that's higher than the number in the stream. 437*11025/25 is 192717, that's still too high, though i took one frame less. I'd like to mix two (or more) streams (video works!) but when i try to figure out how many samples are related to a video frame it gets annoying. I only work with frames with matching audio/video parameters, so rate, bits, channels are the same. As in the example above, it seems i can't just try to read the (audio_rate/video_rate) samples. So i tried it a different way: audio_pos = video_frame * audio_samples / all_video_frames; audio_pos &= ~1; I calculate the size of the data as: size = audio_pos(frame+1) - audio_pos(frame); But this leads to differing sizes, sometimes 438, sometimes 440. (Also, for large number of frames there can be an overflow.) So when i read in video frames from TWO streams, the audio size of the first one may be 438, the second one 440. This leads to complicated algorithms for mixing the audio data. Has anybody got an idea of how to read in the audio chunks related to a frame? I'd like to use a fixed buffer size, this would make things much easier. Thanks for any hints, Torsten. --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] lav_read_audio: how many samples for ONE frame?
Hi Torsten, On Sun, 2003-01-19 at 21:40, Torsten Mohr wrote: > When i open that stream and read out the informations in it i get: > > Video frames: 438 > Video rate: 25.0 frames per second > > Audio channels: 1 > Audio Bits: 16 > Audio Rate: 11025 > Audio Samples: 192413 > > I try to check the audio sample number now: > > 438*11025/25 is 193158, that's higher than the number in the stream. > > 437*11025/25 is 192717, that's still too high, though i took one > frame less. You don't know the exact practical sample rate. The requested sample rate is 11025, but audio card clocks are often biased a bit. > So when i read in video frames from TWO streams, the audio size > of the first one may be 438, the second one 440. This leads > to complicated algorithms for mixing the audio data. Well, yes. You'd need to either resample the audio or just accept that audio can be slightly time-biased within frames (just try to keep this in track by using a total_audio_samples counter). Mixing audio isn't that simple, I fear. Anyway, I don't have much experience here either, others might be able to give much better advice. Ronald -- Ronald Bultje <[EMAIL PROTECTED]> Linux Video/Multimedia developer --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
[Mjpeg-users] transcode usage
I've just built transcode-0.6.2 from source. I've never used it before. I can't use it now either! :o( I figured a basic start point might be this: transcode -x mjpeg -y divx4 -i ac101.avi -o ac101.divx4.avi but it gives me: /usr/local/lib/transcode/import_mjpeg.so: cannot open shared object file: No such file or directory(decoder.c) loading video import module failed OK, let it auto detect: transcode -y divx4 -i ac101.avi -o ac101.divx4.avi which gives: [import_avi.so] v0.4.2 (2002-05-24) (video) * | (audio) * [import_ffmpeg.so] v0.1.0 (2002-11-21) (video) FFMPEG API (build 4631): MS MPEG4v1-3/MPEG4/MJPEG [export_divx4.so] v0.3.7 (2002-10-10) (video) DivX 4.x/5.x | (audio) MPEG/AC3/PCM [import_avi.so] format=0x1, rate=44100 Hz, bits=16, channels=2, bitrate=1411 mjpeg: workarounding buggy AVID mjpeg: interleaved rows: 1 [export_divx4.so] DivX 5.x libraries detected. (aud_aux.c) using lame-3.87 (beta 1, Jan 20 2003) (static) [import_ffmpeg.so] Unsupported decoded frame format clean up | frame threads | unload modules | internal threads | done [transcode] encoded 0 frames (0 dropped, 0 cloned), clip length 0.00 s I tried: lav2yuv ac101.avi | transcode -y mpeg -o ac101.mpeg which gives: transcode v0.6.2 (C) 2001-2002 Thomas Östreich [transcode] auto-probing source (null) (ok) [transcode] V: import format| unknown (V=null|A=null) [transcode] V: import frame | disabled [transcode] V: bits/pixel | 0.000 (unknown) [transcode] V: encoding fps | 25.000 [transcode] A: import | disabled [transcode] A: export | disabled [transcode] A: bytes per frame | 0 (0.00) [transcode] A: adjustment | 0@1000 [transcode] V: IA32 accel mode | sse (sse mmxext mmx asm) [transcode] no option -i found, reading from "/dev/zero" [import_null.so] v0.2.0 (2002-01-19) (video) null | (audio) null [export_null.so] v0.1.2 (2001-08-17) (video) null | (audio) null [export_mpeg.so] v1.2.1 (2002-06-05) (video) MPEG 1/2 | (audio) MPEG 1 Layer II INFO: using reference profile (MPEG1) INFO: profile type is (PAL) ++ WARN: [lav2yuv] unspecified sample-aspect-ratio --- taking a guess... Floating point exception11], 220.99 fps, EMT: 0:00:00, ( 0| 0|10) Hmmm I'm not doing too well here. Can someone spell out for me what I'm doing wrong? I compiled with mjpeg, and it correctly found my 1.6.1 code and libraries. I've got these input filters: /usr/local/lib/transcode/import_ac3.la /usr/local/lib/transcode/import_ac3.so /usr/local/lib/transcode/import_af6.la /usr/local/lib/transcode/import_af6.so /usr/local/lib/transcode/import_avi.la /usr/local/lib/transcode/import_avi.so /usr/local/lib/transcode/import_divx.la /usr/local/lib/transcode/import_divx.so /usr/local/lib/transcode/import_dv.la /usr/local/lib/transcode/import_dv.so /usr/local/lib/transcode/import_dvd.la /usr/local/lib/transcode/import_dvd.so /usr/local/lib/transcode/import_ffmpeg.la /usr/local/lib/transcode/import_ffmpeg.so /usr/local/lib/transcode/import_im.la /usr/local/lib/transcode/import_im.so /usr/local/lib/transcode/import_imlist.la /usr/local/lib/transcode/import_imlist.so /usr/local/lib/transcode/import_lav.la /usr/local/lib/transcode/import_lav.so /usr/local/lib/transcode/import_mpeg2.la /usr/local/lib/transcode/import_mpeg2.so /usr/local/lib/transcode/import_mpeg3.la /usr/local/lib/transcode/import_mpeg3.so /usr/local/lib/transcode/import_mplayer.la /usr/local/lib/transcode/import_mplayer.so /usr/local/lib/transcode/import_net.la /usr/local/lib/transcode/import_net.so /usr/local/lib/transcode/import_null.la /usr/local/lib/transcode/import_null.so /usr/local/lib/transcode/import_nuv.la /usr/local/lib/transcode/import_nuv.so /usr/local/lib/transcode/import_nvrec.la /usr/local/lib/transcode/import_nvrec.so /usr/local/lib/transcode/import_ogg.la /usr/local/lib/transcode/import_ogg.so /usr/local/lib/transcode/import_raw.la /usr/local/lib/transcode/import_raw.so /usr/local/lib/transcode/import_rawlist.la /usr/local/lib/transcode/import_rawlist.so /usr/local/lib/transcode/import_v4l.la /usr/local/lib/transcode/import_v4l.so /usr/local/lib/transcode/import_vdrac3.la /usr/local/lib/transcode/import_vdrac3.so /usr/local/lib/transcode/import_vob.la /usr/local/lib/transcode/import_vob.so /usr/local/lib/transcode/import_xml.la /usr/local/lib/transcode/import_xml.so /usr/local/lib/transcode/import_xvid.la /usr/local/lib/transcode/import_xvid.so /usr/local/lib/transcode/import_yuv.la /usr/local/lib/transcode/import_yuv.so /usr/local/lib/transcode/import_yuv4mpeg.la /usr/local/lib/transcode/import_yuv4mpeg.so and these output filters: /usr/local/lib/transcode/export_af6.conf /usr/local/lib/transcode/export_af6.la /usr/local/lib/transcode/export_af6.so /usr/local/lib/transcode/export_divx4.la /usr/local/lib/transcode/export_divx4.so /usr/local/lib/transcode/export_divx4raw.la /usr/local/lib/transcode/export_divx4raw.so /usr/local/lib/transcode/export_divx5.la /usr/local/lib/transcode/export_divx5.so /usr/local/lib/transc
Re: [Mjpeg-users] Video-encoding questions (mostly DVD related)
>>Here's the command line that I used to generate the video: > >Drop the -b option, raise the -q to 7-8, and use the denoiser. What can I say, Berni, you da man! :-) After messing around with lots of combinations today, I finally found that my so-called high quality LaserDisc looked a lot better if denoised (but not sharpened) and with a q value of 8. I left the bit rate alone, though. Sheesh, it's gonna take me a long time to get good at this. I hope I don't annoy the crap out of everyone meanwhile. :-) Oh, and I finally posted a patch to the mjpegtools web site. Now yuv2lav can do the audio at the same time it does the video. I also posted the script I use to record. My next patch, also to yuv2lav, will allow for A/V synchronization, by either adding or removing a frame every so often. Since my sound chip is separate from my video card, the sampling rates are slightly off, but I found the error is constant and repeatable. I discovered, by doing long recordings and then hand-adjusting the A/V sync near the end, that I need to delete every 30,500th video frame in order to fix the problem. Actually, I don't delete a frame, I just blend 2 frames together and output 1. Also, I don't do frame 30500, 61000, 91500, etc., but instead 15250, 45750, 76250, etc. That way, the average A/V sync error stays less than 1/2 a frame. This allows me to produce some pretty high-quality recordings with my cheap hardware, which is something I think Linux should support as well as possible. I'd post the patch, but it doesn't yet allow one to _add_ a frame if that's what you need to fix the A/V sync, and it's kinda hacked up. I want to rewrite yuv2lav to be multi-threaded, so there's a reader thread, a writer thread, and one or more encoding threads; that'll allow arbitrary frame insertion/deletion without mucking up the architecture, and allow for better performance. Is anyone but me interested in this feature? If so, I'll get off my dead butt & write it. :-) Steven Boswell [EMAIL PROTECTED] --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
[Mjpeg-users] raw YUV data
is it possible using mpeg2dec to dump RAW YUV data? I've gone through /libvo/video_out_yuv4m.c and managed to get rid of the STREAM header and the FRAME header but the filesize dosen't match up with what I think the actual size should be eg. 100x100 frame should have Y=1 bytes U=2500 bytes V=2500 bytes for a total=15,000 bytes multiplied by, say, 10 frames gives filesize of 150,000 bytes. is this correct? or have I lost it:) --- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
