I’ve downloaded “Lupe (4k resolution).mp” from youtube. I’m using a script I’m transcoding from h264 to mpeg but varying the qscale from 1 to 31. The script is only at -qscale 10 now, but I got a bizarre step in the resulting filesize at -qscale 7. ie:

crc@crc-fsmanager:~/sageMedia> ls -lat *q*
-rw-r – r– 1 crc users 374580661 Dec 9 11:07 Lupe.4kq9.mp4
-rw-r – r– 1 crc users 389301775 Dec 9 11:02 Lupe.4kq8.mp4
-rw-r – r– 1 crc users 407061843 Dec 9 10:56 Lupe.4kq7.mp4
-rw-r – r– 1 crc users 276467924 Dec 9 10:50 Lupe.4kq6.mp4
-rw-r – r– 1 crc users 309350328 Dec 9 10:45 Lupe.4kq5.mp4
-rw-r – r– 1 crc users 362690494 Dec 9 10:40 Lupe.4kq4.mp4
-rw-r – r– 1 crc users 455177388 Dec 9 10:36 Lupe.4kq3.mp4
-rw-r – r– 1 crc users 663858946 Dec 9 10:31 Lupe.4kq2.mp4
-rw-r – r– 1 crc users 668366746 Dec 9 10:25 Lupe.4kq1.mp4

Any idea why the jump in filesize at -qscale 7?