Am 04.09.2016 um 14:45 schrieb Carl Eugen Hoyos:
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 itwith smart params it don't double the first pass can be with a faster profileand skip audio entirelyThis 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 videosIt 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
if i don't 'notice issues' which means for me i don't see bad quality and it plays on every device then there is no 'issue'
you get a 'crash' if you differ with completly incompatible params between the two passes
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