Ralph & Michael,

Thanks for the thoughts/tips/ideas for what I'm trying t accomplish!
I really appreciate it!  And thanks for the GREAT program!  In the
past, I've used dvbcut for cutting MPEG from the stream out of my
video capture card (a PVR-250) and it's worked flawlessly.

The stream I'm trying to convert/cut now is from a new digital camera
we just got (Canon Powershot ES850 IS).  How can I tell what type of
codec it is?  When I float the cursor over the file name (the .avi
file), it gives me a type:  Microsoft AVI Video (ARGH!) and Video
Codec says:  mjpg, Audio Codec:  Microsoft PCM.  I'm a relative newbie
when it comes to this video editing stuff in Linux but so far, I've
been able to get by!  And yes, I have messed with AVIDEMUX but not
recently.

That is quite the complicated ffmpeg line but I shall give it a try
and see what kind of results it gives me.  Learned a lot more about
ffmpeg from your message as well!

Thanks!

On 7/30/07, Ralph Glasstetter <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Am Montag, 30. Juli 2007 16:54 schrieb Footer:
> > Hey, hey, I never thought about that!  Convert it to mpg with ffmpeg
> > on the command line and then use DVBCut?
> The only way, if you insist in using DVBcut for cutting an AVI... ;-)
>
> BTW, what codec was used for that AVI-video? DIVX?
> Ever tried AVIDEMUX(2) for cutting it?
>
> > I just tried that and DVBCut
> > didn't like it too much.
> You used probabely the wrong switches...?
>
> > But I was able to shrink the file from 168MB
> > to 6MB which is acceptable to me.
> That's nearly impossible with adequate quality!
>
> > Would be nice to further cut it as
> > an mpg but I don't know how much more time I'm willing to invest to do
> > that.  For what it's worth, here's the line I used to shrink the file
> > (it was 640x480 and this command cut it down to 320x240):
> >
> > ffmpeg -i input_file_640x480.avi -ar 22050 -b 500 -s 320x240
> > output_file_320x240.mpg
> OK, with a bitrate of only 500 bits/sec it's no wonder that you ended up with
> just 6 MB. Could you really see a proper video...? :)
> You have to specifiy "-b 500k" if you want KILObits/sec!!!
>
> But with MPEG2 this also would give a rather bad quality... are you really
> sure that it's a MPEG2 video in an AVI container? I never saw that... and
> with your command line you didn't changed the codec....
>
> > Would welcome any other ideas!!!
>
> For cutting with DVBcut I would convert the video to a rather large bitrate
> MPEG2 stream to preserve the quality as much as possible (without changing
> the resolution!)... maybe with "-target DVD -s 640x480"... and additionally a
> "-acodec copy", if the audio is already coded in MP2/AC3 48kHz.
> But if not, you have to specify "-acodec mp2 -ab196k -ar 48000", otherwise
> DVBcut probabely does not recognize the Audio channel.
>
> After cutting you can shrink it down again to a AVI/DIVX with [EMAIL 
> PROTECTED]
> and [EMAIL PROTECTED]/22kHz or whatever...
>
> I usually use:
>  ffmpeg -i INFILE -f avi -vcodec mpeg4 -b 800k -g 250 -bf 2 -s 640x480 -aspect
> 4:3 -acodec mp3 -ab 128k -ar 44100 OUTFILE
>
> ciao,
> Ralph
>
> >
> > On 7/30/07, Michael Riepe <[EMAIL PROTECTED]> wrote:
> > > Hi!
> > >
> > > Footer wrote:
> > > > Well ... both?
> > >
> > > I doubt that will ever happen. Output, maybe.
> > >
> > > >  Although I wouldn't mind taking AVI input and making
> > > > it MPEG output ... When I try open an AVI file for editing, it says:
> > > > "Unknown file type"
> > >
> > > DVB material uses MPEG-2 container formats (PS/TS) exclusively. There
> > > was (and still is) no need to support other input formats, unless you
> > > want to turn dvbcut into a general-purpose video cutting software.
> > >
> > > That, on the other hand, will require massive changes to the code. I'm
> > > afraid you'll have to live with AVI<->MPEG converters.
> > >
> > > Michael.
> > >
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