[FFmpeg-devel] [PATCH] lavc/mpegvideo_enc: allow to force low_delay by increasing strict_std_compliance

[Steven Liu]

2017-05-23 18:28 GMT+08:00 Stefano Sabatini <stefasab at gmail.com>:

> Forcing low_delay can be useful, even if not officially supported.
> ---
>  libavcodec/mpegvideo_enc.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
> index db241c8..1123788 100644
> --- a/libavcodec/mpegvideo_enc.c
> +++ b/libavcodec/mpegvideo_enc.c
> @@ -671,9 +671,10 @@ FF_ENABLE_DEPRECATION_WARNINGS
>      }
>
>      if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY) {
> -        if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
> +        if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO &&
> +            s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
>              av_log(avctx, AV_LOG_ERROR,
> -                  "low delay forcing is only available for mpeg2\n");
> +                  "low delay forcing is only available for mpeg2,
> increase strict_std_compliance to force it\n");
>              return -1;
>          }
>          if (s->max_b_frames != 0) {
> --
> 1.9.1
>
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LGTM