Hallo,
I digged it up from a older mail:
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,
I'm not sure what kind source you have: because the size is with 800x592
a little bit strange. That is neither PAL not NTSC or SECAM
If you want to encode the result for video please try a command like
that assuming you have a 4:3 source:
> cat stream.yuv │ yuvscaler -O DVD | yuv2lav -I 0 -q 90 -f q -o
video_without_sound.qt &
Depending on the source video you might need to add the -n p/s/n
p=pal,s=secam,n=ntsc switch to yuvscaler.
If it lookes strange please add the output from the commands to the
mail. Add to yuvscaler and yuv2lav: -v 2 so the output is more verbose.
Janos G Komaromi wrote:
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...@jankom.net> 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...@andraslinux.jgklinux.jankom.net
to members of your mailing list.
--
auf hoffentlich bald,
Berni the Chaos of Woodquarter
Email: bernh...@griesbach.at
www: http://www.lysator.liu.se/~gz/bernhard
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