Re: [FFmpeg-devel] [PATCH 1/2] lavc/libopenh264: Support full range videos in transcoding

["\"zhilizhao(赵志立)\"" <quinkblack@foxmail.com>]

> On Apr 18, 2023, at 23:33, Jun Zhao <mypopydev@gmail.com> wrote:
> 
> Support full range videos when transcoding, enabled the
> YUVJ420P to avoid auto scale from YUVJ420P to YUV420P


According to "Towards YUVJ removal"
http://ffmpeg.org/pipermail/ffmpeg-devel/2022-December/304718.html

> So, as was discussed at the last meeting, we should move towards
removing YUVJ.

However, it looks like there is no much progress since then.

> 
> Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
> ---
> libavcodec/libopenh264enc.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/libavcodec/libopenh264enc.c b/libavcodec/libopenh264enc.c
> index 8b4755f5ba..cccc11fbb7 100644
> --- a/libavcodec/libopenh264enc.c
> +++ b/libavcodec/libopenh264enc.c
> @@ -311,10 +311,12 @@ static av_cold int svc_encode_init(AVCodecContext *avctx)
> 
> #if OPENH264_VER_AT_LEAST(1, 6)
>     param.sSpatialLayers[0].uiVideoFormat = VF_UNDEF;
> +
>     if (avctx->color_range != AVCOL_RANGE_UNSPECIFIED) {
>         param.sSpatialLayers[0].bVideoSignalTypePresent = true;
>         param.sSpatialLayers[0].bFullRange = (avctx->color_range == AVCOL_RANGE_JPEG);
> -    }
> +    }  else if (avctx->pix_fmt == AV_PIX_FMT_YUVJ420P)
> +        param.sSpatialLayers[0].bFullRange = 1;
> 
>     if (avctx->colorspace != AVCOL_SPC_UNSPECIFIED      ||
>         avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
> @@ -443,6 +445,7 @@ const FFCodec ff_libopenh264_encoder = {
>     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP |
>                       FF_CODEC_CAP_AUTO_THREADS,
>     .p.pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
> +                                                    AV_PIX_FMT_YUVJ420P,
>                                                     AV_PIX_FMT_NONE },
>     .defaults       = svc_enc_defaults,
>     .p.priv_class   = &class,
> -- 
> 2.25.1
> 
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