Thanks Werner. I believe that u'll find out that disabling scene cut detection might cause a significant quality reduction. Therefore, activating together the forced keyframes and the scene cut detection is probably the most reasonable compromise.
On Wed, May 13, 2015 at 12:47 PM, Werner Robitza <werner.robi...@gmail.com> wrote: > On Wed, May 13, 2015 at 7:07 AM, Anatol <anatol2...@gmail.com> wrote: > > Werner, can you please shortly explain the no-scenecut issue. > > Without scenecut detection, if such event occurs in the middle of the > GOP, > > as it usually does, the video quality till the end of the GOP will be > > rather compromised. It appears as a 'breathing effect'. > > It is mostly stands out when a high quality video played on a large > screen. > > Is there a way to avoid such effects without scene cut detection? > > I haven't seen this in real life but we had pretty short GOPs in our > tests. Could it be that the bitrate is generally too low then? > > Perhaps the qpstep value can be increased to allow the encoder to > choose a lower QP for the non-I frames following a scene cut. > > I still have to test the force_key_frames method to see whether the > quality is really noticeably worse compared to disabling scene-cut > detection altogether. > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
