[FFmpeg-user] 2 pass encoding with hevc_nvenc

Reindl Harald h.reindl at thelounge.net
Sun Sep 4 15:38:49 EEST 2016

Am 04.09.2016 um 14:32 schrieb 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)

given that we use it for a long time now as default in our 
ffmpeg-wrapper, files are typically smaller than with single-pass and 
the quality is as expected the point is "can"

long time means over years for all sort of videos

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 181 bytes
Desc: OpenPGP digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20160904/40fd0385/attachment.sig>

More information about the ffmpeg-user mailing list