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? Regards. 2008/8/27, Luca Abeni <[EMAIL PROTECTED]>: > Hi, > > Stas Oskin wrote: > [...] > > > I found an older post of yours (circa 2006 - > > > http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2006-February/007069.html), > > where you describe the following params: > > > > gop_size = 25 > > me_method = ME_EPZS > > flags = CODEC_FLAG_INTERLACED_ME | CODEC_FLAG_INTERLACED_DCT > > mb_decision = FF_MB_DECISION_RD > > noise_reduction = 250 > > pre_me = 0 > > > Most of those settings depend on the input video. For example: > > > flags = CODEC_FLAG_INTERLACED_ME | CODEC_FLAG_INTERLACED_DCT > > is needed for interlaced video > > > noise_reduction = 250 > > pre_me = 0 > > > me_method = ME_EPZS > these three values were obtained by running a long set of experiments > and comparing the quality. They gave good results for the kind of video > I was using, but for other video inputs you will need different values > (depending on the amount of movement in the scene, the kind of light, > etc...). > > > mb_decision = FF_MB_DECISION_RD > > This is the one I recommended ;-) > > For what concerns the gop_size value, you can try increasing it > to see if the quality of the video improves (but AFAIR some players > have problems with large GOPs). > > > > Luca > _______________________________________________ > 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
