[FFmpeg-user] ffmpeg 1.0 [NULL @ 0xcb4700] [Eval @ 0x7fff0d95cf00] Undefined constant or missing '(' in 'wpred'

[Stefano Sabatini]

On date Friday 2012-10-05 17:18:29 +0200, Reindl Harald encoded:
[...]
> it's not really possible to find out froma php-script what
> exactly version of ffmpeg is available to generate different
> calls - not in a cean and portable way

You may consider to parse ffmpeg -version or ffprobe -show_versions,
added since 0.10 (assuming ffprobe has the same version of ffmpeg),
and tweak your scripts accordingly.

Occasional syntax breaks from one release to the next are
unfortunately unavoidable. But again, using ancient and unmaintained
versions should be avoided.
-- 
ffmpeg-user random tip #11
One minute of video silence with ffmpeg:
ffmpeg -t 60 -s qcif -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero \
    -y silence.mpeg