Dear Michael, Thanks for your reply. I changed the codec to qrtle and I found that there is an alpha channel added. My problem, however, exists. I translate opencv Mat with alpha plane to AVFrame. But in the resultin video I don't see the added alpha plane.
best, ______________________________________________________ Tel: +98 (913) 126-0265 On Tue, Sep 12, 2017 at 8:24 PM, Michael IV <[email protected]> wrote: > As far as I know h264 doesn't support alpha. But VP8 does. > > On Sep 12, 2017 2:06 PM, "Davood Falahati" <[email protected]> > wrote: > >> 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 >> ______________________________________________________ >> >> >> _______________________________________________ >> Libav-user mailing list >> [email protected] >> http://ffmpeg.org/mailman/listinfo/libav-user >> >> > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > >
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