[FFmpeg-devel] [PATCH] avcodec/dnxhdenc: DNxHR 444 and HQX support

[Paul B Mahol]

On 3/27/17, Mark Reid <mindmark at gmail.com> wrote:
> On Mon, Mar 27, 2017 at 11:08 AM, Paul B Mahol <onemda at gmail.com> wrote:
>
>> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>> ---
>>  libavcodec/dnxhdenc.c | 227 ++++++++++++++++++++++++++++++
>> +++++---------------
>>  libavcodec/dnxhdenc.h |   6 +-
>>  2 files changed, 163 insertions(+), 70 deletions(-)
>>

[...]

>> +    case AV_PIX_FMT_YUV444P10:
>> +    case AV_PIX_FMT_GBRP10:
>> +        ctx->bit_depth = 10;
>>
>
> Am I missing something, I thought the dnxhr HQX and 444 profiles were 12bit?
> http://avid.force.com/pkb/articles/en_US/White_Paper/DNxHR-Codec-Bandwidth-Specifications
>

They are both 10 and 12 bit.

> I get a failed Assertion here,
>
> Assertion nbits < ctx->bit_depth + 4 failed at libavcodec/dnxhdenc.c:837
> when I try the following command
> ./ffmpeg_g -y -f rawvideo -video_size 2048x1556 -pixel_format yuv444p10 -i
> /dev/urandom \
>     -loglevel debug \
>     -vframes 5 \
>     -profile:v "dnxhr_444" \
>     -vcodec dnxhd \
>     -pix_fmt yuv444p10 \
>     test.mov
>

What could be cause of that? If I try to avoid that I get ratecontrol error.