[FFmpeg-user] 2 pass encoding with hevc_nvenc

[Carl Eugen Hoyos]

2016-09-04 14:00 GMT+02:00 Reindl Harald <h.reindl at thelounge.net>:
>
> Am 04.09.2016 um 13:57 schrieb Peter White:
>> But the encoding time doubles--not worth it
>
> with smart params it don't double
>
> the first pass can be with a faster profile

> and skip audio entirely

This can have bad effects with FFmpeg and x264:
If you are lucky, you get a crash, in the worst case,
encoding succeeds but you get worse quality than
one-pass (wrong frames get the low quantizers).

Carl Eugen