[FFmpeg-devel] [PATCH] libvpx: Enable vp9 alpha encoding

Vignesh Venkatasubramanian vigneshv at google.com
Fri Jul 1 18:23:07 CEST 2016


On Thu, Jun 30, 2016 at 10:37 PM, James Zern
<jzern-at-google.com at ffmpeg.org> wrote:
> On Thu, Jun 30, 2016 at 4:16 PM, Vignesh Venkatasubramanian
> <vigneshv-at-google.com at ffmpeg.org> wrote:
>> Chrome canary now supports decoding of VP9 streams with alpha
>> channel [1]. Add support to ffmpeg for creating such files.
>>
>> [1] https://codereview.chromium.org/2096813002/
>>
>> Signed-off-by: Vignesh Venkatasubramanian <vigneshv at google.com>
>> ---
>>  libavcodec/libvpx.c    | 3 +++
>>  libavcodec/libvpxenc.c | 1 +
>>  2 files changed, 4 insertions(+)
>>
>
> Wasn't there a vp8+alpha webm in fate?

yes, there is one under vp8_alpha directory. but the test is very weak
as it just does a -c copy and checks if the output has blockadditional
data. if you want, i can replicate the same for vp9. let me know.

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-- 
Vignesh


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