Ffmpeg h264 preset2/18/2023 libx265 slow is even faster then libx264 veryslow for me. This will save you a lot of space without quality loss. If you don't need compatibility to very old devices rather encode with libx265 or 2-pass libvpx-vp9. If you want a faster encode but a larger file set it to slow. ffmpeg -i input.mp4 -s 640x480 -c:a copy output.mp4 This trick will help you to scale your video files to smaller display devices such as tablets and mobiles. The posts will be split up with a finale putting the fasts and slows presets from both H.264 with HEVC. To call the ffmpeg binary in the current folder do./ ffmpeg -i input.mp4 -c:v libx265 -crf 26 - preset fast -c:a aac -b:a 128k output.mp4. preset veryslow will use the best libx264 preset available to make the file as small as possible with H.264 (however needs more time to encode). FFmpeg h264 preset crf comparison 2020 pt1 (fasts) This comprehensive FFmpeg encoding comparison includes H.264 and H.265 HEVC from the fastest preset ultrafast through to veryslow with CRF values from 20 to 30. The default preset is medium but you can choose a faster preset: ffmpeg-i video.webm -preset veryfast video.mp4. Modern video encoders like AV1 will at most times set a keyframe every 10-20s based on scene detection. h.264 - ffmpeg with h264 produces smaller file sizes for veryfast preset - Video Production Stack Exchange ffmpeg with h264 produces smaller file sizes for veryfast preset Ask Question Asked 2 years, 5 months ago Modified 2 years, 5 months ago Viewed 271 times 0 I am experimenting with ffmpeg and x264 codec. Be aware that this increases the file size a lot, you should not use a keyframe every second, except for livestreaming. The slower the preset choosen, the higher compression for the same quality. x264-params keyint=30:scenecut=0 will tell the x264 encoder to set a keyframe every 30s frames (here 1s) and to disable scene detection. Default value: :medium Collection of predefined options providing certain encoding. Need to find your right setting there through testing) Set the encoding preset (from 0 to 18) (default p4) default 0 E.V. crf 25 will let the encoder decide on the bitrate for a medium quality (lower it for better quality / higher file size, increase it for worse quality / lower file size. vcodec libx264 will let ffmpeg encode in plain old H.264 r 30 befor input pictures will say ffmpeg to use 30 pictures per second Ffmpeg -r 30 -i %04d.jpg -vcodec libx264 -crf 25 -x264-params keyint=30:scenecut=0 -preset veryslow video.mp4
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