[FFmpeg-user] libaom - first frame not lossless when > 7 frames in source

Carl Eugen Hoyos ceffmpeg at gmail.com
Sun Mar 21 10:55:57 EET 2021

Am Sa., 6. Juni 2020 um 21:05 Uhr schrieb Kieran O Leary
<kieran.o.leary at gmail.com>:

> I was doing some tests with libaom and lossness encoding and with synthetic
> files and some real world files, I kept finding that the framemd5s for the
> first frame was different than the source, but every other libaom encoded
> frame produced matching framemd5s for source and output.
> I then tried with smaller frame counts, and with synthetic files, I found
> that all frames would produce matching framemd5s when there was between 1
> and 7 frames in the input. Once you went to 8 frames and above, the first
> frame would produce a framemd5 mismatch.

Should be fixed, work-around was to set qmax to 0.

Carl Eugen

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