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avformat/mpegts: add support for preserving SMPTE 2038 when transcoding MPEG-TS streams

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Add the appropriate descriptors to the MPEG-TS demux and mux to
ensure that SMPTE 2038 VANC streams are properly preserved
when using codec copy (including adding the appropriate PMT
descriptors).

The focus of this patch is TS input to TS output.  A separate
patch adds support for output of 2038 VANC over decklink SDI.

Thanks to Marton Balint for feedback to preserve ABI compatibility.

Signed-off-by: Devin Heitmueller <dheitmueller@ltnglobal.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Devin Heitmueller
2023-03-17 11:03:49 -04:00
committed by Marton Balint
parent 0d3a2f9370
commit 19798229df
3 changed files with 10 additions and 2 deletions
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6
libavformat/mux.c
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@@ -304,7 +304,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
par->codec_tag = av_codec_get_tag(of->p.codec_tag, par->codec_id);
}
if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
par->codec_id != AV_CODEC_ID_SMPTE_2038)
si->nb_interleaved_streams++;
}
si->interleave_packet = of->interleave_packet;
@@ -942,7 +943,8 @@ int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt,
++stream_count;
} else if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
par->codec_id != AV_CODEC_ID_VP8 &&
par->codec_id != AV_CODEC_ID_VP9) {
par->codec_id != AV_CODEC_ID_VP9 &&
par->codec_id != AV_CODEC_ID_SMPTE_2038) {
++noninterleaved_count;
}
}