Re: glav error opening .avi file

Hi Janos,

I know I'm coming into this discussion a bit late but what kind of 
editing do you need to do on the files? If it's just "topping and 
tailing" - extracting specific timed sections out of the capture files 
and encoding them to another file - then the way I do it is with ffmpeg 
using something like:

$ ffmpeg -accurate_seek -ss $START_TIME_SECS -t $DURATION_SECS \
-i $SOURCE_FILE -c:v $VIDEO_CODEC $VIDEO_CODEC_OPTIONS -vtag $FOURCC \
-c:a $AUDIO_CODEC $AUDIO_CODEC_OPTIONS $OUTPUT_FILE

Hopefully, the shell variables are self-explanatory. I can get the times 
by simply playing the video with vlc or similar and using the fine 
adjustment controls and/or reduced play speed. You can add in filters as 
necessary to sharpen/denoise/crop.

I used to do this quite regularly and had a script to automate it, which 
I dumped onto github a few years ago at:
https://github.com/molletts/handy-scripts/tree/master/cut-video
in case someone somewhere found it useful. It's some years since I last 
used it so I don't know whether it still works. Both components (the 
main script and the helper which it calls) need to be in $PATH.

I've never tried Kdenlive or Pitivi so I don't know what they're like 
but I've seen them both mentioned as good-enough video editors for basic 
work. They've both got ebuilds in the main Gentoo repo so it may be 
worth giving one or both a try. (Kdenlive is likely to pull in a ton of 
KDE dependencies, of course.)

Hope this helps,
Stephen

On 15/10/2022 16:14, Janos G Komaromi wrote:
> Progress report after reading the FM.
> 
> Executed the followig commands:
> mplayer -ao pcm:fast:file=audio.wav -v null ezcap0001.avi
> cat audio.wav | mp2enc -o audio.mp2
> mplex audio.mp2 video_svcd.m2v -o test.mpg
> mplex -V -r 1740 audio.mp2 video_svcd.m2v -o test.mpg
> mplayer test.mpg
> glav test.mpg
> 
> Results:
> (1) mplex in either forms complains about too many frames dropped and
> then quits.
> (2) mplayer plays the file, but it is a long video, so I stopped B4
> completion.
> (3) glav has the same error as in my initial post.
> 
> So I'm still asking for help. There is no video editor available for
> Gentoo. I like glav and would like to use it for my video files
> transferred from old video recorder tapes.
> 
> Thx - Janos
> 
> 
> On Mon, 10 Oct 2022 14:51:11 -0400
> Janos G Komaromi <[email protected]> wrote:
> 
>> Hi,
>>
>> Thanks, Bernie. One step closer.
>> I recompiled mplayer, and now the command works. I now have a
>> "video_svcd.m2v" file. It plays with mplayer but there is no sound.
>> So the next step: how do I make a complete file, video and sound, that
>> glav will be able to process for editing?
>>
>> Regards,
>>
>> Janos
>>
>> On Sat, 8 Oct 2022 19:15:04 +0200
>> Bernhard Praschinger <[email protected]> wrote:
>>
>>> Hallo
>>>
>>> Janos G Komaromi wrote:
>>>> Yes Bernie, that's it. My distro is Gentoo, which means it i
>>>> compiled from a Gentoo source. I believe I can recompile it with
>>>> the yuv4mpeg use flag. I'll post another message once I succeed
>>>> with the original command set just to close this thread. Thank you
>>>> for your help - Janos
>>> One thing comes into my mind, it might be that the configure script
>>> checks if the mjpegtools libraries are available and only activates
>>> it automatic if it finds them the Option that force yuv4mpeg is:
>>> --enable-yuv4mpeg.
> 
> 
>