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

[Carl Eugen Hoyos]

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