[FFmpeg-user] piped ffmpeg output to movie filter with preserved alpha channel

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Mar 27 11:57:36 CET 2013

Alex Vasilenko <aa.vasilenko <at> 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.

(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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