reimaginemedia / webm

Automatically exported from code.google.com/p/webm
0 stars 0 forks source link

Constrained mode overshot target bitrate. #967

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago
Tested on v1.3.0-5445-g7467936

My command lines

ffmpeg -i <input> -c:v libvpx-vp9 -pass 1 -b:v 1400K -crf 33 -threads 8 -speed 
4 -tile-columns 6 -frame-parallel 1 -auto-alt-ref 1 -lag-in-frames 25 -an -f 
webm /dev/null -y

ffmpeg -i <input> -c:v libvpx-vp9 -pass 2 -b:v 1400K -crf 33 -threads 8 -speed 
2 -tile-columns 6 -frame-parallel 1 -auto-alt-ref 1 -lag-in-frames 25 -c:a 
libopus -b:a 64k -f webm out.webm -y

I asked max to be 1400K. I got about 1600K.

My input was a 1080p 60fps 1.5 minute file.

Original issue reported on code.google.com by fgalli...@google.com on 6 Mar 2015 at 6:55