Re: glav error opening .avi file + mailing list addition

Hallo,

> I have not been doing video stuff for a few years, but now as a retiree
> I wanted to digitize my old videos from magnetic tapes. I have a neat
> gizmo that creates an .avi file from VHS video and stereo inputs on a
> micro sd card. The created .avi file plays well with vlc.
That kind of device is what I would use this day's too.

> Here is my issue and request for help.
> 
> I try to make some very basic editing of the digitized .avi file, but
> ran into a problem. I studied my older posts, notes, but am still
> stuck. It looks like the.avi file created with the digitizing gizmo is
> too sophisticated for lavplay or glav - see below. Do I need to trans-
> code the .avi file, and how? Thank you for your attention - Janos
> 
> As a side note: could you please add another email address to this
> mailing list. It is the address on the mail server running on my Fitlet
> machine - [email protected]
> 
> DETAILS:
> janos@andraslinux ~/tmp $ lavplay -p S -v 2 ezcap0001.avi
> lavplay2.2.1
> lavtools version 2.2.1
> --DEBUG: [lavplay] Opening video file ezcap0001.avi ...
> **ERROR: [lavplay] Error opening ezcap0001.avi
> 
> janos@andraslinux ~/tmp $ file ezcap0001.avi
> ezcap0001.avi: RIFF (little-endian) data, AVI, 800 x 592, 30.00 fps,
> video: XviD, audio: MPEG-1 Layer 3 (stereo, 44100 Hz)
> 
> janos@andraslinux ~/tmp $ ffprobe ezcap0001.avi
> ffprobe version 4.4.2 Copyright (c) 2007-2021 the FFmpeg developers
>    built with gcc 11.3.0 (Gentoo 11.3.0 p4)
> ...
> Input #0, avi, from 'ezcap0001.avi':
>    Duration: 01:48:51.67, start: 0.000000, bitrate: 967 kb/s
>    Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID /
> 0x44495658), yuv420p, 800x592 [SAR 1:1 DAR 50:37], 896 kb/s, 30 fps, 30
> tbr, 30 tbn, 30 tbc Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055),
> 44100 Hz, stereo, fltp, 64 kb/sThe mjpegtools can only handle a few AVI Codecs. For example: dvvideo 
and mjpeg it can't decode the encoded MPEG4

I don't know if ffmpeg can decode it in a format the mjpegtools 
understand. But mplayer can (should) do it, here is are example commands 
for video:
 >mkfifo stream.yuv
 >cat stream.yuv │ yuvdenoise │ yuvscaler -O SVCD │ mpeg2enc -f 4 -o 
video_svcd.m2v
 >mplayer -nosound -noframedrop -vo yuv4mpeg anyfile.mpg

For Audio:
 >mplayer -vo null -ao pcm:file=anyfile.wav anyfile.mpg
 > cat anyfile.wav │ mp2enc -v 2 -V -o sound.mp2

You find a section in the: mjpegtools manpage called: Decoding streams 
with mplayer that should explain it in more detail. I hope the program

I did a quick check it should work. Please test it and let us know if it 
worked.

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: [email protected]
www: http://www.lysator.liu.se/~gz/bernhard


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