[FFmpeg-user] using -vtag on input files
nichot20 at yahoo.com
Thu Apr 2 18:14:39 CEST 2015
On 02/04/15 16:11, Roee Kashi wrote:
> first, since my rawvideo input is YV12 and there's no such pix_fmt, yuv420p
> without vtag results with a blue-pink video output.
I guess because its decoding it as yuv not yvu
> second, before vtag supported input files, i had to convert the file first
> to avi with -vcodec copy, and then convert it to mpeg4 or something, which
> takes forever.
Its odd that ffmpeg can handle yvu, without exposing a specific pix_fmt
to match, even more so as yvu ordering is common in mpeg (which is
probably why your workaround worked...
> i think this thread could shed some light on this matter (last message is
> the most important i think):
Ahh so Carl added that in ffmpeg.c for sources in 6bca574a ....
and then later on it was re-added in a merge of 746dca483a2f in
2014/02/24 but into ffmpeg_opt.c
I wonder if that's where it all went wrong...
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