Am 12.02.19 um 21:43 schrieb Lou Logan: > This looks like a command from 10 years ago. > Use -crf instead of -b. If you must use -b then use -b:v. > > Use scale filter instead of -s. If you need to scale. > > Do you need to crop? > > You don't need -aspect. If you do want to mess with aspect use setsar filter. > > You probably don't need -level. Are you encoding for a device that requires > level 3? Does your output work with level 3? The console output will let you > know if it exceeds the level limits. > > Get rid of everything starting from -flags to -qdiff. That's what -preset is > for. The presets were made so users don't have to use a million options. > > Do you really need to do two passes? Are you targeting a specific output file > size? If no, then don't use -pass or -passlogfile, use -crf, and do it all in > one pass. > > So your command could be simplified to something like: > ffmpeg -i input -c:v libx264 -crf 22 -preset slow -c:a aac output.mp4 Much thanks for your valuable hints Lou. The program K9Copy was not maintained since years, so the used templates are equal old as I suspected.
I'm not sure, if I need 2 passes, I'm at the beginning of my experiments, but I think, -movflags faststart could be useful. If I need 2 passes I should know about the correct syntax, "-flags pass1" or "-pass 1". Also I would be happy to understand, what the leading '+' is for the -flags values. I honestly don't know, if I need -level, but I want to know, how to determine, if the codec options are valid for audio, video or both. -Ulf _______________________________________________ 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".
