[FFmpeg-user] piped ffmpeg output to movie filter with preserved alpha channel
aa.vasilenko at gmail.com
Wed Mar 27 12:02:33 CET 2013
On Wednesday, March 27, 2013 at 12:57 , Carl Eugen Hoyos wrote:
> Alex Vasilenko <aa.vasilenko <at> gmail.com (http://gmail.com)> writes:
> > ffmpeg -loop 1 -i watermark2.jpg -t 5 -c qtrle [...]
> > -f mpegts -pix_fmt argb -
> mpegts does not support the qtrle codec, this is not a FFmpeg
> limitation, but a limitation of the specification.
mpegts was just an example. I've tried a lot of combinations of codec/container to pipe but all of them exits with error.
Maybe FFmpeg community knows exact combination of codec/container that can be piped with preserved alpha channel?
> (It is a bug imo that FFmpeg tries to mux something in a
> transport stream that certainly cannot be decoded.)
> Carl Eugen
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> ffmpeg-user at ffmpeg.org (mailto:ffmpeg-user at ffmpeg.org)
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