Quoting James Almer (2024-07-17 03:49:22)
> diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> index 2bea55e33d..5de188f4cf 100644
> --- a/libavformat/movenc.c
> +++ b/libavformat/movenc.c
> @@ -1399,6 +1399,11 @@ static int mov_write_audio_tag(AVFormatContext *s, 
> AVIOContext *pb, MOVMuxContex
>                  avio_wb16(pb, 16);
>              avio_wb16(pb, track->audio_vbr ? -2 : 0); /* compression ID */
>          } else { /* reserved for mp4/3gp */
> +#if CONFIG_IAMFENC
> +            if (track->tag == MKTAG('i','a','m','f'))
> +                avio_wb16(pb, 0); /* channelcount must be 0 for IAMF */
> +            else
> +#endif
>              avio_wb16(pb, track->par->ch_layout.nb_channels);

avio_wb16(pb, track->tag == MKTAG('i', 'a', 'm', 'f') ?
              0 : track->par->ch_layout.nb_channels);

looks more readable to me

-- 
Anton Khirnov
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