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jeanslack / Videomass

Videomass is a free, open source and cross-platform GUI for FFmpeg and yt-dlp
https://jeanslack.github.io/Videomass/
GNU General Public License v3.0
1.12k stars 51 forks source link

Question: speed #92

Closed johannesdedoper closed 2 years ago

johannesdedoper commented 2 years ago

Hello @jeanslack,

Please delete this issue, found an possible answer.

jeanslack commented 2 years ago

Hello @johannesdedoper,

OK, anyway if you don't solve it try posting the log here and let's take a look at it.

johannesdedoper commented 2 years ago

Hello @jeanslack ,

the thing is that Handbrake can do an HEVC NVenc encoding with a vbr of 2600k medium preset with 270fps and Videomass with same settings comes to 170 fps. With the fast preset Videomass will do 270fps+ (between 300 even 600fps!!). Handbrake will stay with the fast en faster preset at 270fps however. Strange? Seems that the combination of bitrate encoding and presets are not doing anything within Handbrake. Also Handbrake takes up much more CPU power (40% +) compared to Videomass (6 - 10%).

Just wondering why the different behaviour? Eg. Cinecoder shows the same behaviour as Videomass. Xvid4PSP seems to be using the fast preset as standard as it encodes the files with 300-600 fps and almost no CPU usage.

It's not really important as the fast preset gives nearly the same quality and filesize as the medium preset (within 3% - 6%). But I'm just curious.

Cheers, J.

jeanslack commented 2 years ago

I would be curious too, but not having now the ability to use hardware acceleration... Check out this thread if it helps https://superuser.com/questions/1296374/best-settings-for-ffmpeg-with-nvenc

Cheers