[FFmpeg-devel] Re: [PATCH] libavformat/mpegts: fix network pid is 0 in pat_cb

[Kieran Kunhya via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

On Thu, 27 Nov 2025, 10:53 ganqiuye via ffmpeg-devel, <
ffmpeg-devel@ffmpeg.org> wrote:

> When analysing PAT, if network PID is 0, it won't get the PMT PID.
>
> Signed-off-by: ganqiuye <ganqiuye@gmail.com>
> ---
>  libavformat/mpegts.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
> index 33f2914104..f6d860007f 100644
> --- a/libavformat/mpegts.c
> +++ b/libavformat/mpegts.c
> @@ -2590,14 +2590,13 @@ static void pat_cb(MpegTSFilter *filter, const
> uint8_t *section, int section_len
>              break;
>          pmt_pid &= 0x1fff;
>
> -        if (pmt_pid == ts->current_pid)
> -            break;
> -
>          av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid,
> pmt_pid);
>
>          if (sid == 0x0000) {
>              /* NIT info */
>          } else {
> +            if (pmt_pid == ts->current_pid)
> +                break;
>              MpegTSFilter *fil = ts->pids[pmt_pid];
>              struct Program *prg;
>              program = av_new_program(ts->stream, sid);
> --
> 2.45.1.windows.1
>

Needs some comment to explain why as PID 0 is for PAT.

Kieran

>
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