2016-09-04 14:38 GMT+02:00 Reindl Harald <h.rei...@thelounge.net>: > > Am 04.09.2016 um 14:32 schrieb Carl Eugen Hoyos: >> >> 2016-09-04 14:00 GMT+02:00 Reindl Harald <h.rei...@thelounge.net>: >>> >>> Am 04.09.2016 um 13:57 schrieb Peter White: >>>> >>>> But the encoding time doubles--not worth it >>> >>> with smart params it don't double >>> >>> the first pass can be with a faster profile >> >>> and skip audio entirely >> >> This can have bad effects with FFmpeg and x264: >> If you are lucky, you get a crash, in the worst case, >> encoding succeeds but you get worse quality than >> one-pass (wrong frames get the low quantizers) > > given that we use it for a long time now as default in our > ffmpeg-wrapper, files are typically smaller than with > single-pass and the quality is as expected the point is "can" > > long time means over years for all sort of videos
It depends on the output format and I suspect it also depends on sync implementation that can change without real notice. Allow me to repeat that the true problem is that you may not notice issues: Encoding succeeds but the quantizers are incorrectly dsitributed (starting from the second frame). You only get the crash if you are lucky. Carl Eugen _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
