[FFmpeg-devel] [PATCH] lavf/movenc: mark mov/mp4 as supporting VFR

[James Almer]

On 3/29/2024 5:35 AM, Anton Khirnov wrote:
> ---
>   libavformat/movenc.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> index b97c479cc4..30cfbf6e74 100644
> --- a/libavformat/movenc.c
> +++ b/libavformat/movenc.c
> @@ -8230,11 +8230,11 @@ const FFOutputFormat ff_mov_muxer = {
>       .write_packet      = mov_write_packet,
>       .write_trailer     = mov_write_trailer,
>       .deinit            = mov_free,
> +    .p.flags           = AVFMT_GLOBALHEADER | AVFMT_TS_NEGATIVE | AVFMT_VARIABLE_FPS
>   #if FF_API_ALLOW_FLUSH
> -    .p.flags           = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH | AVFMT_TS_NEGATIVE,
> -#else
> -    .p.flags           = AVFMT_GLOBALHEADER | AVFMT_TS_NEGATIVE,
> +                       | AVFMT_ALLOW_FLUSH
>   #endif
> +                         ,
>       .p.codec_tag       = (const AVCodecTag* const []){
>           ff_codec_movvideo_tags, ff_codec_movaudio_tags, ff_codec_movsubtitle_tags, 0
>       },
> @@ -8282,11 +8282,11 @@ const FFOutputFormat ff_mp4_muxer = {
>       .write_packet      = mov_write_packet,
>       .write_trailer     = mov_write_trailer,
>       .deinit            = mov_free,
> +    .p.flags           = AVFMT_GLOBALHEADER | AVFMT_TS_NEGATIVE | AVFMT_VARIABLE_FPS
>   #if FF_API_ALLOW_FLUSH
> -    .p.flags           = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH | AVFMT_TS_NEGATIVE,
> -#else
> -    .p.flags           = AVFMT_GLOBALHEADER | AVFMT_TS_NEGATIVE,
> +                       | AVFMT_ALLOW_FLUSH
>   #endif
> +                         ,
>       .p.codec_tag       = mp4_codec_tags_list,
>       .check_bitstream   = mov_check_bitstream,
>       .p.priv_class      = &mov_isobmff_muxer_class,

There's a custom check for these muxers in 
avformat_transfer_internal_stream_timing_info() that would afaict be 
disabled with this change.