[FFmpeg-devel] [PATCH] lavc/libvpxenc: fix -auto-alt-ref option type

[James Zern]

On Fri, Oct 21, 2016 at 4:55 AM, Ronald S. Bultje <rsbultje at gmail.com> wrote:
> Hi,
>
> On Thu, Oct 20, 2016 at 11:14 PM, James Zern <jzern-at-google.com at ffmpeg.org
>> wrote:
>
>> On Thu, Oct 20, 2016 at 8:31 AM, Kagami Hiiragi <kagami at genshiken.org>
>> wrote:
>> > vp9_cx_iface actually allows values in range [0..2].
>> > This fixes ticket #5894.
>> >
>> > Signed-off-by: Kagami Hiiragi <kagami at genshiken.org>
>> > ---
>> >  libavcodec/libvpxenc.c | 7 ++++++-
>> >  1 file changed, 6 insertions(+), 1 deletion(-)
>> >
>>
>> This is all right in the sense that the library exposes the option. In
>> practice the feature was never fully developed and will cause failures
>> in certain hardware decoders.
>
>
> Maybe these hardware should be blacklisted.
>

I don't necessarily disagree, but I think issues with multiple altrefs
and/or the frequency of individual ones is somewhat pervasive. So
blacklisting might mean vp9 wasn't an option on some platforms. This
is part of the reason behind all this [1].

[1] http://www.webmproject.org/vp9/levels/