Re: [Mjpeg-users] glav error opening .avi file

[Janos G K. <ja...@an...>]

Sorry to bother this community again with a follow up question:

Now that glav works I have visually noticed a difference between the
original (compressed) file and the glav-compatible (huge) file. In
order to confirm my suspicion I issued the command:
ffprobe -v error -show_format -show_streams <both versions>
and compared the outputs - see attached diff.txt file.

It is obvious that
(a) width and height ratio is changed (lines 12-13 vs 19-20);
(b) yuv420p vs yuvj422p (lines 26 vs 33) - maybe not relevant for visual
appearance;
(c) time base (lines 42 vs 44) - this explains the bloated size, do we
need this, and if not, how to leave it as original?

Obviously, only item (a) is important, the rest is mainly for my
curiosity and better understanding of the digital video concepts.

Janos


On Wed, 19 Oct 2022 14:36:58 -0400
"Janos G. Komaromi" <ja...@ja...> wrote:

> Thanks. Yes, glav works with -a 0.
> 
> As far as /dev/dsp is concerned I may have to recompile kernel to
> include oss drivers. I'll keep on working the sound part, but for my
> most immediate editing tasks sound output is not that important.
> 
> Thanks again for all you support and also for Stephen's idea of ffmpeg
> method of simmply cutting out a section of the original (compressed)
> .avi file.
> 
> Best to all,
> 
> Janos
> PS - please add my other email address
> ja...@an...
> to members of your mailing list.
>