On Tue, 29 Apr 2014 12:13:01 -0700 J Decker <[email protected]> wrote:
> On Tue, Apr 29, 2014 at 3:26 AM, Abhishek Maniyar < > [email protected]> wrote: > > > Hello Everyone, > > > > I am trying to connect to RTSP using FFMPEG library in iOS. > > > > I am using TCP. Some times in poor network conditions, packets with older > > PTS received. Is it possible in FFMPEG to get a packet with PTS is sequence > > 10,11,12,13,7,8,9,….. Should FFMPEG not discard packets those are older den > > current packet? > > > I had the same sort of sequential PTS in some videos; another place to > ignore that and use your own frame count based PTS... like MP4 clips come > in ticks, mkv come in milliseconds in the PTS and some are sequential > counts (avi) and even playing from disk I got backwards numbers Seems like you don't understand timestamps at all. First, PTS can go backwards on the packet level. This is because some codecs reorder frames on decoding. Packet PTS are in encoded order, not in display order, and the decoder will reorder the PTS to display order for you (just like it reorders the decoded pictures). See AVFrame fields for more info. Second, timestamps in ffmpeg are always relative to a timebase. The timebase tells you in what units the PTS values are in. You just divide the PTS by the timebase, and you get the time in seconds. The demuxer will tell you the timebase; see AVStream.time_base. _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
