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