[Libav-user] Adding alpha channel to h264 encoder
falahati.davood at gmail.com
Fri Sep 15 19:44:19 EEST 2017
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.
Tel: +98 (913) 126-0265
On Tue, Sep 12, 2017 at 8:24 PM, Michael IV <explomaster at gmail.com> wrote:
> As far as I know h264 doesn't support alpha. But VP8 does.
> On Sep 12, 2017 2:06 PM, "Davood Falahati" <falahati.davood at gmail.com>
>> 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.
>> Davood Falahati
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
> Libav-user mailing list
> Libav-user at ffmpeg.org
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