2016-03-31 11:24 GMT+02:00 Moritz Barsnick <barsn...@gmx.net>: > a) Why are you using "-pass 1"? AFAIU it will still create an encoded > video, but it is really meant for multi-pass encoding. > > b) What do you intend to achieve with "-b:v 0"? No video in the world > can compress that well. ;-) (I'm not aware of any special semantics > of the value '0' either.) >
About that, I can enlighten you: "-b:v 0" is used for Constant Quality encoding for vp9; it works with -crf to determine the "visual quality" of the video. Setting both -b:v and -crf result in constrained quality (like constant quality with a maximum bitrate value). A good read on this: https://trac.ffmpeg.org/wiki/Encode/VP9 However, there is no mention of multiple passes, and it wouldn't do much good in constant quality encoding anyway, as two-pass is used to improve variable bitrate encoding (at least for other codecs). _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user