On Fri, May 18, 2018 at 11:15:04AM -0700, Aman Gupta wrote: > From: Aman Gupta <a...@tmm1.net> > > These fields will allow the mpegts demuxer to expose details about > the PMT/program which created the AVProgram and its AVStreams. > > In mpegts, a PMT which advertises streams has a version number > which can be incremented at any time. When the version changes, > the pids which correspond to each of it's streams can also change. > > Since ffmpeg creates a new AVStream per pid by default, an API user > needs the ability to (a) detect when the PMT changed, and (b) tell > which AVStream were added to replace earlier streams. > > This has been a long-standing issue with ffmpeg's handling of mpegts > streams with PMT changes, and I found two related patches in the wild > that attempt to solve the same problem. > > The first is in MythTV's ffmpeg fork, where they added a > void (*streams_changed)(void*); to AVFormatContext and call it from > their fork of the mpegts demuxer whenever the PMT changes. > > The second was proposed by XBMC in > https://ffmpeg.org/pipermail/ffmpeg-devel/2012-December/135036.html, > where they created a new AVMEDIA_TYPE_DATA stream with id=0 and > attempted to send packets to it whenever the PMT changed. > > Signed-off-by: Aman Gupta <a...@tmm1.net> > --- > doc/APIchanges | 4 ++++ > libavformat/avformat.h | 8 ++++++++ > libavformat/utils.c | 1 + > libavformat/version.h | 2 +- > 4 files changed, 14 insertions(+), 1 deletion(-) > > diff --git a/doc/APIchanges b/doc/APIchanges > index befa58c84a..a592073ca5 100644 > --- a/doc/APIchanges > +++ b/doc/APIchanges > @@ -15,6 +15,10 @@ libavutil: 2017-10-21 > > API changes, most recent first: > > +2018-05-xx - xxxxxxxxxx - lavf 58.15.100 - avformat.h > + Add pmt_version field to AVProgram > + Add program_num, pmt_version, pmt_stream_idx to AVStream > + > 2018-05-xx - xxxxxxxxxx - lavf 58.14.100 - avformat.h > Add AV_DISPOSITION_STILL_IMAGE > > diff --git a/libavformat/avformat.h b/libavformat/avformat.h > index 6dce88fad5..ade918f99c 100644 > --- a/libavformat/avformat.h > +++ b/libavformat/avformat.h > @@ -1103,6 +1103,13 @@ typedef struct AVStream { > */ > int stream_identifier; > > + /** > + * Details of the MPEG-TS program which created this stream. > + */ > + int program_num; > + int pmt_version; > + int pmt_stream_idx; > + > int64_t interleaver_chunk_size; > int64_t interleaver_chunk_duration; >
These are added below the "All fields below this line are not part of the public API." This contradicts the addition to APIChanges [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB If you think the mosad wants you dead since a long time then you are either wrong or dead since a long time.
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