[FFmpeg-devel] [PATCH 1/2] avcodec: add photocd decoder

[Paul B Mahol]

On 12/22/18, Steinar H. Gunderson <steinar+ffmpeg at gunderson.no> wrote:
> On Sat, Dec 22, 2018 at 09:04:26PM +0100, Paul B Mahol wrote:
>> I can not accept internal conversion to RGB. This is subsampled format
>> after all.
>
> Well, it's not Y'CbCr, so if so, you'd need to add a new AVPixelFormat value
> (e.g. AV_PIX_FMT_YCC420P). I'm not sure what applications would do with it
> except convert it to RGB, though. (You can't convert subsampled YCC to
> subsampled Y'CbCr without upsampling, converting and then subsampling again,
> which is obviously lossy.)

Unacceptable, I'm not adding another yuv420p variant.