[FFmpeg-devel] [PATCH] Adding ffv1 help reference for "coder" parameter.

[Tobias Rapp]

On 13.09.2015 19:13, Peter B. wrote:
>  libavcodec/ffv1enc.c |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/libavcodec/ffv1enc.c b/libavcodec/ffv1enc.c
> index 265ced1..d210692 100644
> --- a/libavcodec/ffv1enc.c
> +++ b/libavcodec/ffv1enc.c
> @@ -1345,6 +1345,7 @@ static av_cold int encode_close(AVCodecContext *avctx)
>  #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
>  static const AVOption options[] = {
>      { "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
> +    { "coder", "Coder used: 0 (Golomb Rice), 1 (Range coder), 2 (Range coder with custom state transition table)", OFFSET(ac), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
>      { NULL }
>  };

I guess this won't work. From a brief look at encode_init() in ffv1enc.c 
it seems that the ac value is derived from AVCodecContext->coder_type so 
the "coder" doc would be found in the global codec options:
http://ffmpeg.org/ffmpeg-codecs.html#Codec-Options

Regards,
Tobias