Anton Khirnov:
> Demuxers are not supposed to update AVCodecParameters after the stream
> was seen by the caller. This value is not important enough to support
> dynamic updates for.
> ---
>  libavformat/dv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavformat/dv.c b/libavformat/dv.c
> index f65c2d596f..9c8b0a262c 100644
> --- a/libavformat/dv.c
> +++ b/libavformat/dv.c
> @@ -280,6 +280,7 @@ static int dv_extract_audio_info(DVDemuxContext *c, const 
> uint8_t *frame)
>              c->ast[i]->codecpar->codec_id   = AV_CODEC_ID_PCM_S16LE;
>              c->ast[i]->codecpar->ch_layout  = 
> (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
>              c->ast[i]->start_time           = 0;
> +            c->ast[i]->codecpar->bit_rate   = 2 * dv_audio_frequency[freq] * 
> 16;
>  
>              c->audio_pkt[i].size         = 0;
>              c->audio_pkt[i].data         = c->audio_buf[i];
> @@ -290,7 +291,6 @@ static int dv_extract_audio_info(DVDemuxContext *c, const 
> uint8_t *frame)
>              c->audio_pkt[i].pos          = -1;
>          }
>          c->ast[i]->codecpar->sample_rate    = dv_audio_frequency[freq];
> -        c->ast[i]->codecpar->bit_rate       = 2 * dv_audio_frequency[freq] * 
> 16;
>      }
>      c->ach = ach;
>  

LGTM.

- Andreas
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