[FFmpeg-devel] [PATCH 7/8] avformat/mpegtsenc: add registration descriptor for AC-3 and EAC3

[lance.lmwang at gmail.com]

On Wed, Jul 22, 2020 at 11:27:38PM +0800, lance.lmwang at gmail.com wrote:
> From: Limin Wang <lance.lmwang at gmail.com>
> 
> copy the atsc ac3 audio in ts like below:
> ./ffmpeg -i atsc_audio.ts -c:v copy -c:a copy out.ts
> Stream #0:6[0x64](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
> 
> ./ffmpeg -i out.ts
> Before:
> Stream #0:1[0x101](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
> 
> After applied patch:
> Stream #0:1[0x101](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
> 
> Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> ---
>  libavformat/mpegtsenc.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
> index a5b45fb..f060ea6 100644
> --- a/libavformat/mpegtsenc.c
> +++ b/libavformat/mpegtsenc.c
> @@ -535,6 +535,11 @@ static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
>                      *q++=1; // 1 byte, all flags sets to 0
>                      *q++=0; // omit all fields...
>                  }
> +            } else {
> +                if (codec_id == AV_CODEC_ID_AC3)
> +                    put_registration_descriptor(&q, MKTAG('A', 'C', '-', '3'));
> +                else if (codec_id == AV_CODEC_ID_EAC3)
> +                    put_registration_descriptor(&q, MKTAG('E', 'A', 'C', '3'));
>              }
>              if (codec_id == AV_CODEC_ID_S302M)
>                  put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
> -- 
> 1.8.3.1
> 

ping the patch, as I'll submit patch to support atsc ac3 descriptor after that.



-- 
Thanks,
Limin Wang