Re: [Mjpeg-users] green screen and noise
I've got it working. In short, I use this command lavrec --software-encoding --format=a --input=P --use-read --geometry=320x240 --audio-source=l --audio-volume=100 --time=10 test.avi This is using the loopback cable that goes into the line-in in my sound-card. Using a sound-mixer, set the recording source to Line (I use rexima), and make the volume about 90% Note that I have used --input=P. I am recording from the Composite1 channel, but P is for SVHS. The key thing to note is that these letters are dual-purpose. I have a BT878 card, and if you look at the second part of each latter p - PAL through Composite or 1st Bt8x8 input P - PAL through SVHS- or 2nd Bt8x8 input t - PAL through TV-tuner- or 3rd Bt8x8 input you will see that we are using the 2nd Bt8x8 input (which is Composite). I think the documentation could point this out somewhat better. The only problem I have now is that playback (with lavplay) is rather quiet. -- Cameron Kerr Email: [EMAIL PROTECTED] Website: http://nzgeeks.org/cameron/ --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] How to use the -S option of mplex?
On Sunday 05 Jan 2003 2:25 pm, you wrote: On Sun, Jan 05, 2003 at 12:49:12PM +0100, Andrew Stevens wrote: Sounds like your using an older version. There was a bug where the size for -f 8 was effectively hard-wired to 2GB. This is certainly fixed in the development version and I think I also merged in the (1 line) fix into the 1.6.1 stable release. Well, no, mplex gives me: mjpegtools mplex version 1.6.1 Usage: mplex [params] -o output filename pattern input file... Prior to that, I was using version 1.6.0 with same result. O.k. the fix you want is that in mplex/multplexor.cc The line after case MPEG_FORMAT_DVD : max_segment_size = 2000*1024*1024; should actually read: if( max_segment_size == 0 ) max_segment_size = 2000*1024*1024; I think the cause of the Problem is fairly obvious when you see the above ;-) There should be a 1.6.2 release with bug-fixed and updated mplex and mpeg2enc out pretty shortly that does include the fix. Andrew PS If all you're interested in is spliting the file over mutliple CD's for storage then simply using the split utility to split the output files at 2048 byte boundaries will work just fine. E.g. cat bigfiles.*.mpg | split -b 780m - littlefiles. for f in littlefiles.* do mv $f $f.mpg done N.b. this will *not* work for (S)VCD but there mpeg2enc/mplex will handle the splitting for you correctly. Andrew --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] How to use the -S option of mplex?
On Sun, 5 Jan 2003, Gregoire Favre wrote: On Sun, Jan 05, 2003 at 12:49:12PM +0100, Andrew Stevens wrote: Sounds like your using an older version. There was a bug where the size for -f 8 was effectively hard-wired to 2GB. This is certainly fixed in the development version and I think I also merged in the (1 line) fix into the 1.6.1 stable release. Well, no, mplex gives me: mjpegtools mplex version 1.6.1 Usage: mplex [params] -o output filename pattern input file... Prior to that, I was using version 1.6.0 with same result. Thank you for your answer ;-) Please keep CC to me as I am not on this ml!!! Grégoire Here is what I did to mplex/multplex.cc to get -S working.. (this patch is for 1.6.0, but its is essentially a 1 line change easily applied by hand on other versions if needed..) --- multplex.cc.old Mon Apr 29 12:30:56 2002 +++ multplex.cc Sun Nov 24 13:35:59 2002 @@ -271,7 +271,9 @@ timestamp_iframe_only = true; video_buffers_iframe_only = true; vbr = true; -opt_max_segment_size = 2000*1024*1024; +// opt_max_segment_size = 2000*1024*1024; +// changed to activate the -S option +if(opt_max_segment_size = 0) opt_max_segment_size = 2000*1024*1024; opt_multifile_segment = true; break; Selva --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Transcoding/scaling from 720x480 to (S)VCD
On Sun, 5 Jan 2003, beatrice wrote: Hi all. I have a mpg file and I'd like to make a VCD (a SVCD will be ok just the same) out of it but I didn't succeed so far. The file is a MPEG1 video 720x480 NTSC 29.97 fps 3750kbps (that's what mplayer tells) I demuxed it with bbdmux, and the video stream I got plays well. Then to get a VCD format I tried several commands, none of them worked. Here's the command I used (I played a lot with the options but that's the basic command I've used) cat video.m1v | mpeg2dec -o YUVh | yuvscaler -n n -O VCD | mpeg2enc -f 1 -o video_vcd.m1v (I've also tried -F 1 -F 4 and -I 1) -I 1 is needed as VCD frames (only 240 vertical lines) are not interlaced. Even otherwise your input appears to be converted film and so progressive to start with (mpeg1 is for progressive video) When I try to watch the output video file video_vcd.m1v it's all filled with colored vertical lines. Looks like the original video is deformed. At the bottom of this message there's the first part of the command's ouput. looks alright to me -- actually you dont need yuvscaler in the chain: -o YUVh generates 352x240 frames needed for VCD. Pass -I 0 -a 2 to mpeg2enc as mpeg2dec may not set the progressive flag and aspect ratio correctly. None of these will explain the colored vertical lines you see so check the input to mpeg2enc using yuvplay: mpeg2dec -s -o YUVh video.mpg | yuvplay Maybe I'm messing something with the framerate (becomes 23.97, don't know why); I really don't know where to start, the more I read the more I get confused: any hint will be much appreciated. 23.97 is most probably the correct frame rate as detected by mpeg2dec.. Thanks in advance, beatrice. Selva P.S. I wish to all of you a great 2003!! Happy new year to you too ! --- command output starts here mpeg2dec-0.2.1-mjpegtools-0.6 - by Michel Lespinasse [EMAIL PROTECTED] and Aaron +Holtzman Using MMX for IDCT transform Using 3DNOW for motion compensation INFO: [yuvscaler] yuvscaler (version 1.6.0) is a general scaling utility for +yuv frames INFO: [yuvscaler] (C) 2001 Xavier Biquard [EMAIL PROTECTED] INFO: [yuvscaler] yuvscaler -h for help, or man yuvscaler INFO: [yuvscaler] VCD output format requested in NTSC norm INFO: [yuvscaler] yuvscaler input: frame size: 352x240 pixels (126720 bytes) INFO: [yuvscaler] yuvscaler input: frame rate: 24000/1001 fps (~23.976024) INFO: [yuvscaler] yuvscaler input:interlace: anyone's guess INFO: [yuvscaler] yuvscaler input: sample aspect ratio: 2000:1523 INFO: [yuvscaler] from 352x240, take 352x240+0+0 INFO: [yuvscaler] scale to 352x240, 352x240 being displayed,NOT_INTERLACED/PROGRESSIVE INFO: [yuvscaler] Scaling uses the RESAMPLE algorithm, INFO: [yuvscaler] without line switching, INFO: [yuvscaler] without time forwarding. INFO: [yuvscaler] frame rate: 23.976 fps INFO: [yuvscaler] Scaling ratio for width is 1 to 1 INFO: [yuvscaler] and is 1 to 1 for height INFO: [yuvscaler] Specific downscaling routing number 4 INFO: [yuvscaler] yuvscaler output: frame size: 352x240 pixels (126720 +bytes) INFO: [yuvscaler] yuvscaler output: frame rate: 24000/1001 fps +(~23.976024) INFO: [yuvscaler] yuvscaler output:interlace: none/progressive INFO: [yuvscaler] yuvscaler output: sample aspect ratio: 2000:1523 INFO: [mpeg2enc] VCD default options selected INFO: [mpeg2enc] Selecting VCD output profile INFO: [mpeg2enc] Assuming norm NTSC ++ WARN: [mpeg2enc] No aspect ratio specifed and no guess possible: assuming 4:3+display aspect! INFO: [mpeg2enc] Encoding MPEG-1 video to video_vcd.m1v INFO: [mpeg2enc] Horizontal size: 352 pel INFO: [mpeg2enc] Vertical size: 240 pel INFO: [mpeg2enc] Aspect ratio code: 12 = 1:1.1250 (4:3 NTSC for +720x480/352x240 images) INFO: [mpeg2enc] Frame rate code: 1 = 24000.0/1001.0 (NTSC 3:2 pulldown +converted FILM) INFO: [mpeg2enc] Bitrate: 1151 KBit/s INFO: [mpeg2enc] Field order for input: none/progressive INFO: [mpeg2enc] New Sequence every 700 Mbytes INFO: [mpeg2enc] Assuming non-video stream of 230 Kbps INFO: [mpeg2enc] Search radius: 16 INFO: [mpeg2enc] GOP SIZE RANGE 9 TO 15 INFO: [mpeg2enc] Setting colour/gamma parameters to NTSC INFO: [mpeg2enc] Progressive format frames = 1 INFO: [mpeg2enc] mpeg1 - setting intra_dc_precision = 0 INFO: [mpeg2enc] Buffering 39 frames INFO: [yuvscaler] Frame number 0 INFO: [mpeg2enc] SETTING 3DNOW and MMX for QUANTIZER! INFO: [mpeg2enc] SETTING MMX for MOTION! INFO: [mpeg2enc] SETTING MMX for TRANSFORM! INFO: [mpeg2enc] SETTING MMX for PREDICTION! INFO: [yuvscaler] Frame number 1 INFO: [yuvscaler] Frame number 2 ... .. --- This sf.net email is sponsored by:ThinkGeek Welcome
Re: [Mjpeg-users] Transcoding/scaling from 720x480 to (S)VCD
On Monday 06 January 2003, at 11:02, Selva Nair wrote: Hi! Thanks for your reply. With your help and the help of those who answered me by email I solved my problem :) None of these will explain the colored vertical lines you see so check the input to mpeg2enc using yuvplay: mpeg2dec -s -o YUVh video.mpg | yuvplay I've tried this and the output is already disturbed, so I tried mpeg2dec -s -o YUV and although I can't watch it with yuvplay (I get a 'insufficient resource for operation' error ) I redirected the output to a file and watched it with mplayer and it's ok. So at the end I was able to make a SVCD using yuvscaler and the command I used was (in case it could help someone in the future): cat video.mpg | mpeg2dec -s -o YUV | yuvscaler -n n -O SVCD | mpeg2enc -F 4 -f 4 -o video.m1v Many thanks!! Ciao, beatrice. -- And the end of all our exploring Will be to arrive where we started And know the place for the first time. T.S. Eliot Little Gidding/Four Quartets (1942) --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Help for VCD from Stills
On Sonntag, 5. Januar 2003 20:57, Norman Nunn wrote: 4. To generate cue bin VCD image files vcdimager --iso-volume-label=My Text VCD *.mpg vcdxgen *.mpg vcdxbuild videocd.xml will probably do it (except that you will have to alter the xml file to reflect the volume label). -- Hannes --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] Command line tools to mix/overlay/join twolavrec-AVIs?
Hi Torsten, On Mon, 2003-01-06 at 20:05, Torsten Mohr wrote: In the documentation i only found references to transist.flt, as i understand it this only enables the third effect i mentioned, for the others i'd have to write a filter, correct? There's one more, matteblend.flt. LVS also contains some more filters, look in the effects/ directory of LVS. It seems that writing a filter is not impossible, looking at the sources. Is anybody working on other filters? Not that I know of. Is anybody using blenderpublisher (www.blender.org)? It can generate animations with background invisible. I'd like to overlay those over an AVI as an animated logo. As an alpha channel is only available in single pictures, it would have to read in a LAV stream and single pictures. Matteblend can do this, though it's not easy with moving pictures. What do you think of this? Hard, but not impossible. Most code already exists. :-). Ronald -- Ronald Bultje [EMAIL PROTECTED] Linux Video/Multimedia developer --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] lav2wav from movtar file is gurgly
Hey Brian, On Mon, 2003-01-06 at 22:18, [EMAIL PROTECTED] wrote: Perhaps, but a format that is readable before the file is closed would be ideal. One word: MPEG... :-(. Ronald -- Ronald Bultje [EMAIL PROTECTED] Linux Video/Multimedia developer --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
[Mjpeg-users] Question about SVCD aspect
Hi all. I'm creating my first SVCD (30 minutes). After mpeg2enc (I'm following the steps in the HOWTO), I preview it with mplayer, and it shows up as a strange aspect, taller than it ought to be, and and with thick black side borders. Also, the image isn't terribly great on the bottom (colour out of whack, a bit, ahhh, streaky???). Is this normal for a SVCD (captured using PAL, if it matters). I've yet to burn it (I'll need to go to a friends place to test it on his DVD player (plays SVCD also)). Also, is it normal for a 30 minute recoding to take about 12 hours for mpeg2enc to process? Thanks -- Cameron Kerr Email: [EMAIL PROTECTED] Website: http://nzgeeks.org/cameron/ --- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] lav2wav from movtar file is gurgly
On Mon, 6 Jan 2003 20:26:51 -0500
[EMAIL PROTECTED] wrote:
lav2yuv only provides the video track though right? How does
mencoder get the audio to mux in with the yuv data?
Good point. You would have to do
lav2wav editlist.edl out.wav
after encoding the video then compress/mux the two with the
appropriate programs for your target format. I use vorbis so I
lav2wav editlist.edl | oggenc - -q=0 -o out.ogg
then mux that with the mpeg4 produced by mencoder using ogmtools.
This is a four stage process (I use two stage video encoding) that
takes around 2.5 times realtime for 704x496 PAL on an Athlon 1333.
Or cat all your avis together and run the output file through
mencoder -ao copy -ovc copy -o newfile.avi -forceidx outfile.avi
then encode newfile.avi
That would require 300% transient disk space though. With MPEG{1,2}
files I wouldn't complain so much but MJPEG files are 5-10x as big!
That's something to consider, certainly :-)
I guess I was just looking for a bit less jerry-rigging (I don't
mind hacking but all of this hackery needed to deal with what seems
like woefully inadequite formats like avi and qt files is just
ugly).
It is, but until lavrec can output ogm...
Martin
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Re: [Mjpeg-users] Question about SVCD aspect
On Tue, 7 Jan 2003, Cameron Kerr wrote: Hi all. I'm creating my first SVCD (30 minutes). After mpeg2enc (I'm following the steps in the HOWTO), I preview it with mplayer, and it shows up as a strange aspect, taller than it ought to be, and and with thick black side borders. Also, the image isn't terribly great on the bottom (colour out of whack, a bit, ahhh, streaky???). Hard to comment on that unless you give more details on the input source, command line used etc.. Is this normal for a SVCD (captured using PAL, if it matters). No I've yet to burn it (I'll need to go to a friends place to test it on his DVD player (plays SVCD also)). I wouldn't burn it if mplayer cant play it correctly.. Also, is it normal for a 30 minute recoding to take about 12 hours for mpeg2enc to process? Depends on the hardware and whether you are denoising or not.. On an Athlon 1800 with 512MB RAM I get about 11fps for mpeg2enc: ie about 85 minutes encoding time for a 30minute movie. Add to that the time to decode, scale and possibly denoise the input avi, it may take anywhere from 2 to 4 hours. Selva --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
Re: [Mjpeg-users] lav2wav from movtar file is gurgly
Hey Martin, On Tue, 2003-01-07 at 03:26, Martin Collins wrote: It is, but until lavrec can output ogm... Is that a hint? ;-). Ronald -- Ronald Bultje [EMAIL PROTECTED] Linux Video/Multimedia developer --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
