[x264-devel] ultrafast profile regression

[BugMaster]

On Mon, 29 Oct 2018 19:18:49 +0300, Aleksey Vasenev wrote:
> Revision: 71ed44c7312438fac7c5c5301e45522e57127db4  
> Author: Vittorio Giovara <vittorio.giovara at gmail.com>
> Date: 06.01.2017 17:23:38  
> Message:  
> Unify 8-bit and 10-bit CLI and libraries  


>   
>   
Lost: param->>analyse.i_trellis = 0; 
>   
>   
> 1. ultrafast slower than superfast  
>   
>        2. in real video 3x speed degrade with trellis 1  
>   
>   
>   https://code.videolan.org/videolan/medialibrary-test-samples.git  
>        ffmpeg -i "mrmssmith.mkv" -an -preset ultrafast -y -threads 1       "ultrfast.mkv"
>        ffmpeg -i "mrmssmith.mkv" -an -preset ultrafast -y -threads
> 1       -trellis 0 "ultrfast_trellis_0.mkv"  
>        ffmpeg -i "mrmssmith.mkv" -an -preset superfast -y -threads 1       "superfast.mkv"
>   
>        mrmssmith.mkv  
>        ultrafast - 36.4x  
>        ultrfast_trellis_0 - 111x  
>        superfast 53.6x  
>   
>        anamorph.mkv  
>        ultrafast - 7.23x  
>        ultrfast_trellis_0 - 21.1x  
>        superfast - 11.6x  
>   

>   

Hi.

It is already fixed in sandbox repository after your previous bug
report from 7 November 2018. It will be pushed to official x264
repository during next release so no need to ping this topic again (it
wasn't forgotten).