If you had a GOP of 150 and fps of 15. Wouldn't that mean that you could only seek in 10 second intervals because you have to start with an I-frame?
Quoting Stas Oskin <[EMAIL PROTECTED]>: > Hi. > > I looked the values in the util.c and wanted to clarify what we talk about: > > mbd - mb_decision > +trell - Trellis quantization > > I couldn't find the other 2 flags (cmp and subcmp) in ffmpeg.c code. > > And about GOP, for fps say of 15, we are talking here about gop of 150? > > Regards. > > 2008/8/28, Robert Swain <[EMAIL PROTECTED]>: >> 2008/8/27 Stas Oskin <[EMAIL PROTECTED]>: >> >> > Hi. >> > >> > >> > Thanks for the explanation, I presume you used it with analogue >> > content (Interlaced), and with large bitrates? >> > >> > About gop_size, I might be wrong of course, but doesn't it set the >> > interval of sending intra-frame? >> > >> > So if it set it to 25 (over 10 like in example), doesn't it actually >> > causes FFMPEG to produce less intra-frames, and thus leaving more to >> > prediction, and to resulting in-accuracy/lesser quality? >> >> >> Normally when using b-frames in MPEG-4 Part 2 one would use a gop size >> of ~10*frame rate. As I recall, Michael recommended: >> >> -mbd 2 -cmp 2 -subcmp 2 -flags +trell >> >> So whatever that maps to in libavcodec/utils.c >> >> Rob >> >> _______________________________________________ >> 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 > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
