On Fri, Jul 1, 2016 at 9:23 AM, Vignesh Venkatasubramanian
<vigneshv-at-google....@ffmpeg.org> wrote:
> On Thu, Jun 30, 2016 at 10:37 PM, James Zern
> <jzern-at-google....@ffmpeg.org> wrote:
>> On Thu, Jun 30, 2016 at 4:16 PM, Vignesh Venkatasubramanian
>> <vigneshv-at-google....@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 <vigne...@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.
>

I think it would make sense if there was going to be work done on the
decode side.
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