Am Di., 30. März 2021 um 16:43 Uhr schrieb Alexandre Bizeau <abiz...@36pix.com>: > > > While using following ffmpeg command : > > ffmpeg -framerate 12 -pattern_type glob -i 'FRAMES/frame_*.tif' -map 0:v > test_binffmpeg.mp4 > > It uses the default H.264 parameters which are preset=medium and crf=23. This > generates a file size with bit_rate = 1358 kb/s and size = 1659kb. > > But by using my own code to encode an mp4 video (using the exact same > images), I then have a video around bit_rate = 3929 kb/s and size = 4757kb. > > In my code, I leave the codec options to default, and even if I try to > overwrite with preset=medium + crf=23, I still have the same size of 4757kb.
> I'm wondering what I am missing? Isn't 23 the default for crf? Carl Eugen _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/libav-user To unsubscribe, visit link above, or email libav-user-requ...@ffmpeg.org with subject "unsubscribe".
