Open colemar opened 1 year ago
I can confirm your observation and the default encoding setting use slightly different options for encoding.
The big difference is the use of 'mbbrc' setting, which produce bigger output filesize to get a higher quality in action scenes.
I am not a friend of default settings, because I prefer high quality in qsv encoding.
My recommend parameters in advanced video encoding settings: tu=1:la=1:la-depth=60
tu=1 slowest encode and max. quality in intel qsv encode! Great! la=lookahead activated la-depth=60 (highest positive value to analyse the video and get the best quality and compression)
Also use high profile level 4.1 for FullHD
Bitrate: min 4.000 kbit/s (standard quality), 6.000 kbit/s (good quality) and 8.000 kbit/s (fantastic details)
Looks like they fixed the doc.
lookahead (or la)
Use the LookAhead (LA or LA_ICQ) bitrate control algorithm. Default: 1 (on) Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.7 (1.8 for LA_ICQ) of the Media SDK API. lookahead-depth (or la-depth)
If LookAhead bitrate control is enabled, number of frames that are analyzed before encoding, from 11 to 60. Default: 40 Note: may be sanitized to a lower value in some cases to avoid hangs. Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.7 of the Media SDK API
Problem Description
https://handbrake.fr/docs/en/1.6.0/technical/video-qsv.html This page says lookahead=1 is the default.
I verified that putting
lookahead=1
in Advanced Options forH.264 (Intel QSV)
makes a difference in the output file size and content.Activity Log, Crash Log or any other details
What Operating System are you running?
Microsoft Windows NT 10.0.19045.0
What version of HandBrake are you running?
HandBrake 1.6.1 (2023012300)
Where did you download HandBrake from?
https://handbrake.fr/rotation.php?file=HandBrake-1.6.1-x86_64-Win_GUI.exe