Re: [FFmpeg-devel] [PATCH v4] lavc/libvpxenc: add screen-content-mode option

[James Zern via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

On Sat, Feb 10, 2024 at 12:22 AM Dariusz Marcinkiewicz via
ffmpeg-devel <ffmpeg-devel@ffmpeg.org> wrote:
>
> This exposes VP8E_SET_SCREEN_CONTENT_MODE option from libvpx.
>
> Co-authored-by: Erik Språng <sprang@webrtc.org>
> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
> ---
>  doc/encoders.texi      |  3 +++
>  libavcodec/libvpxenc.c | 11 +++++++++++
>  libavcodec/version.h   |  2 +-
>  3 files changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/doc/encoders.texi b/doc/encoders.texi
> index c9fe6d6143..0868aa66db 100644
> --- a/doc/encoders.texi
> +++ b/doc/encoders.texi
> @@ -2150,6 +2150,9 @@ of quality.
>  Set a change threshold on blocks below which they will be skipped by the
>  encoder.
>
> +@item screen-content-mode
> +Screen content mode, one of: off (0), screen (1), screen with more aggressive rate control (2).
> +

Move this above 'VP9-specific options' and add a section for VP8. Also
reword this to '...one of: 0 (off), 1 (screen), ...'. The parameter is
an integer so should list that first, similar to aq-mode.

>  @item slices (@emph{token-parts})
>  Note that FFmpeg's @option{slices} option gives the total number of partitions,
>  while @command{vpxenc}'s @option{token-parts} is given as
> diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
> index 80988a2608..0d507beaae 100644
> --- a/libavcodec/libvpxenc.c
> +++ b/libavcodec/libvpxenc.c
> @@ -102,6 +102,7 @@ typedef struct VPxEncoderContext {
>  #define VP8F_AUTO_ALT_REF    0x00000002 ///< Enable automatic alternate reference frame generation
>
>      int auto_alt_ref;
> +    int screen_content_mode;
>

Move this above '// VP9-only' and add '// VP8-only'.

> [...]
> @@ -1946,6 +1956,7 @@ static const AVOption vp8_options[] = {
>      { "auto-alt-ref",    "Enable use of alternate reference "
>                           "frames (2-pass only)",                        OFFSET(auto_alt_ref),    AV_OPT_TYPE_INT, {.i64 = -1}, -1,  2, VE},
>      { "cpu-used",        "Quality/Speed ratio modifier",                OFFSET(cpu_used),        AV_OPT_TYPE_INT, {.i64 = 1}, -16, 16, VE},
> +    { "screen-content-mode",     "Encoder screen content mode",         OFFSET(screen_content_mode), AV_OPT_TYPE_INT, {.i64 = -1}, -1,  2, VE, "screen_content_mode"},

Remove the last item, "screen_content_mode". This no longer describes
a group of options.
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