On Tue, Sep 11, 2018 at 16:38:37 +0430, Ali Shirvani wrote: > Is this variation in output size normal? or should I tune some settings?
Yes, it's normal - different encoders use different default settings. Yes, you should tune your settings. If you want to achieve similar size, use the "-b:v" (video bitrate) command line parameter. Yet quality may differ significantly, depending on the effort and the encoding methods used by the encoder. (Even at somewhat constant quality, you can vary the size of the libx264 encoding significantly by using different "-preset" options.) If you want to achieve identical quality, you need to fiddle with the available options. libx264 offers "-crf" for its (default) variable bitrate encoding (also for fixed). Other H.264 encoders probably use other options (such as "-q:v", but its impact may differ depending on encoder) and may even default to constant bitrate. Check in the manual or with: $ ffmpeg -h encoder=encoder_name Cheers, Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
