Ah that does help, since this is an MPEG-2 stream, that must be it, thanks!
On Sun, Jan 10, 2010 at 5:32 AM, Christian Cier-Zniewski < [email protected]> wrote: > Hi, > > have a look at the docs here: > > " > int AVCodecContext::ticks_per_frame > > For some codecs, the time base is closer to the field rate than the > frame rate. > > Most notably, H.264 and MPEG-2 specify time_base as half of frame > duration if no telecine is used ... > > Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it > to 2. > " > > Hope that helps... > > > Christian > > Sean McAllister schrieb: > > Hmmm I'm not necessarily seeing where it explains it, what am I missing? > > > > On Sat, Jan 9, 2010 at 10:55 PM, Sean McAllister <[email protected]> > wrote: > > > >> Excellent! Thanks! > >> > >> > >> On Sat, Jan 9, 2010 at 10:22 PM, Art Clarke <[email protected]> wrote: > >> > >>> On Sat, Jan 9, 2010 at 9:08 PM, Sean McAllister <[email protected]> > >>> wrote: > >>> > >>>> So I'm reading the documentation on the AVCodecContext struct: > >>>> > >>>> > >>>> > >>> > http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/structAVCodecContext.html#b7bfeb9fa5840aac090e2b0bd0ef7589<http://cekirdek.pardus.org.tr/%7Eismail/ffmpeg-docs/structAVCodecContext.html#b7bfeb9fa5840aac090e2b0bd0ef7589> > < > http://cekirdek.pardus.org.tr/%7Eismail/ffmpeg-docs/structAVCodecContext.html#b7bfeb9fa5840aac090e2b0bd0ef7589 > > > >>> < > >>> > http://cekirdek.pardus.org.tr/%7Eismail/ffmpeg-docs/structAVCodecContext.html#b7bfeb9fa5840aac090e2b0bd0ef7589 > >>>> > >>>> It says that time_stamp should be 1.0/framerate, but I'm checking out > >>> this > >>>> video that's 29.<whatever> FPs, and I get > >>>> a time_stamp of .016683 which corresponds to 59.94FPS, ie time_stamp = > >>>> 1.0/(2.0*frame_rate). Which is correct? > >>>> > >>>> Sean > >>>> > >>> This might help: > >>> http://wiki.xuggle.com/Concepts > >>> > >>> It explains the concepts of time stamps, time bases and framerate as > used > >>> in > >>> Xuggler -- but Xuggler just wraps FFmpeg's libav library so the same > >>> concepts apply. > >>> > >>> - Art > >>> > >>> -- > >>> http://www.xuggle.com/ > >>> xu‧ggle (zŭ' gl) v. To freely encode, decode, and experience audio and > >>> video. > >>> > >>> Use Xuggle to get the power of FFmpeg in Java. > >>> _______________________________________________ > >>> libav-user mailing list > >>> [email protected] > >>> https://lists.mplayerhq.hu/mailman/listinfo/libav-user > >>> > >> > > _______________________________________________ > > libav-user mailing list > > [email protected] > > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > > > _______________________________________________ > libav-user mailing list > [email protected] > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
