Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Video Encoding > MPEG-4 AVC / H.264

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 6th January 2020, 12:00   #1  |  Link
peter71
Registered User
 
Join Date: Jul 2003
Posts: 8
Why avisynth bottlenecks ffmpeg nvenc-oding ?

Hi,

Transcoding of a H.264 file with my RTX2060 goes with a blazingly fast ~400 fps, when decoding is hw. accelerated too.

The same thing when served with AviSynth FFmpegSource2 (AviSynth+ 3.4 (r2923, 3.4, x86_64)) falls down to ~130fps.

Now I understand, that frameserving+decoding is a CPU intense job, and my CPU is kind of a relic (Xeon E5450), but Avsmeter says:

FPS (min | max | average): 121.2 | 251.4 | 196.3
Process memory usage (max): 47 MiB
Thread count: 9
CPU usage (average): 87.9%

This significant difference between 130 and 196 is the problem, I am trying to track down. Any idea please?
peter71 is offline   Reply With Quote
 

Tags
avisynth, bottleneck, ffmpeg, nvenc

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 21:21.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.