OK thank you very much for the tips. I will have to dig into that a bit deeper, so far I haven't had to build the libraries myself. One further question: do you expect similar dependencies/config for vp9 with alpha as well?
Can you confirm that in general alpha-decoding should work with the ffmpeg libraries? At least "the Internet" claims ffmpeg can handle these streams and I was able to create a pre-multiplied version of the video using libvpx which suggests it does work somehow with that same build. On Mon, Feb 1, 2021 at 10:43 AM Carl Eugen Hoyos <[email protected]> wrote: > > > > > Am 01.02.2021 um 00:08 schrieb Craig Turner <[email protected]>: > > > > You are absolutely right - the format is AV_PIX_FMT_YUV420P, so it seems > the alpha channel is not being decoded. Is there something specific I need > to do to ensure it does indeed get decoded? > > It may be necessary to configure with --disable-decoder=vp8 > > Carl Eugen > _______________________________________________ > Libav-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe".
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