[Libav-user] Adding alpha channel to h264 encoder

[Davood Falahati]

Dear community,

I have a opevCV Mat frame, call it mask. I decode frames into AVFrame,
convert AVFrame to openCV Mat and encode them into AVPacket again.

Now, I want to add an alpha channel to my resulting video. Can you help me
with that?

- FYI, I tried to add alpha channel to openCV Mat and convert it to
AVFrame. But it fades whole the video and it mars the color distribution.

Best
Davood Falahati
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