On Mon, Sep 29, 2014 at 07:41:28PM +0200, wm4 wrote: > Useful for Bluray and DVD, since the libraries used to read them just > change the byte stream under your feet on seeking. > > Maybe there should be a AVInputFormat callback for this. But the > mpeg-ps (DVD) and the mpeg-ts (Bluray) demuxers don't change much > state during seeking - they just try to find a new packet with > timestamps (in read_timestamp), so I haven't found a need for this > yet. I don't want to add unused things. > > I've also thought about adding a flush callback, and implementing > them in mpeg.c and mpegts.c by just calling ff_read_frame_flush(). > Might be slightly better, because you can have avformat_flush() fail > on formats which don't support this? > > Or maybe a flag? > > TODO: add entry to APIchanges, bump minor version. > --- > libavformat/avformat.h | 13 +++++++++++++ > libavformat/utils.c | 6 ++++++ > 2 files changed, 19 insertions(+) > > diff --git a/libavformat/avformat.h b/libavformat/avformat.h > index 78054de..eaa52fa 100644 > --- a/libavformat/avformat.h > +++ b/libavformat/avformat.h > @@ -2173,6 +2173,19 @@ int av_seek_frame(AVFormatContext *s, int > stream_index, int64_t timestamp, > int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, > int64_t ts, int64_t max_ts, int flags); > > /** > + * Discard all internally buffered data. This can be useful when dealing with > + * discontinuities in the byte stream. Generally works only with some simple > + * formats.
id call them stream based or without a central header instead of simple. > + * > + * This does not flush the AVIOContext (s->pb). If necessary, call > + * avio_flush(s->pb) before calling this function. > + * > + * @param s media file handle > + * @return >=0 on success, error code otherwise > + */ > +int avformat_flush(AVFormatContext *s); i think this should document what happens with the streams are they flushed too so that nb_streams could decrease ... i guess the case where they could decrease doesnt make much sense as that can already be achived by closing the demuxer and reopening it ... [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB He who knows, does not speak. He who speaks, does not know. -- Lao Tsu
signature.asc
Description: Digital signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
