[FFmpeg-user] alpha channel "overlay" or "movie"

[Carl Eugen Hoyos]

angelfilo <at> gmail.com <angelfilo <at> gmail.com> writes:

> ffmpeg version N-43170-gd84dd35 Copyright (c) 2000-2012 the FFmpeg developers
>   built on Aug  6 2012 18:05:03 with llvm-gcc 4.2.1 (LLVM build 2336.9.00)

>   configuration: --enable-gpl --enable-libx264

>   WARNING: library configuration mismatch
>   avutil      configuration: --enable-libmp3lame --enable-shared 
> --disable-mmx --arch=x86_64

The configuration does indeed look different...

> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video1.mov':

>     Stream #0:0(eng): Video: mpeg4 (Simple Profile), yuv420p

> Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'video2.mov':

>     Stream #1:0(eng): Video: mpeg4 (Simple Profile), yuv420p

Both your videos are yuv420p which cannot store transparency, 
so I believe your original question is impossible to answer.

Please do not top-post here, Carl Eugen