[FFmpeg-trac] #7483(undetermined:new): CRF value not working when encoding with libaom in AV1

[FFmpeg]

#7483: CRF value not working when encoding with libaom in AV1
-------------------------------------+-------------------------------------
             Reporter:  Ewout        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: CRF value not working when encoding with libaom in AV1
 How to reproduce:
 {{{
 % ffmpeg -i input libaom-av1 -crf 15 -strict experimental output
 % ffmpeg -i input libaom-av1 -crf 20 -strict experimental output
 % ffmpeg -i input libaom-av1 -crf 25 -strict experimental output
 % ffmpeg -i input libaom-av1 -crf 30 -strict experimental output
 }}}
 '''ffmpeg version:''' ffmpeg-20181007-0a41a8b-win64-static
 '''built on:''' Windows 10 64-bit

 No matter what CRF value is used, the encoded files will have the same
 bitrate.

 Here is the file I used to test (VP9) and the encoded results (AV1) with
 identical bitrates:

 {{{
 ffmpeg -i C:\Falcon9Timelapse360p.mp4 -c:v libaom-av1 -crf 15 -strict
 experimental av1_test_Falcon9Timelapse360pcrf15.mkv
 ffmpeg -i C:\Falcon9Timelapse360p.mp4 -c:v libaom-av1 -crf 20 -strict
 experimental av1_test_Falcon9Timelapse360pcrf20.mkv
 ffmpeg -i C:\Falcon9Timelapse360p.mp4 -c:v libaom-av1 -crf 25 -strict
 experimental av1_test_Falcon9Timelapse360pcrf25.mkv
 ffmpeg -i C:\Falcon9Timelapse360p.mp4 -c:v libaom-av1 -crf 30 -strict
 experimental av1_test_Falcon9Timelapse360pcrf30.mkv
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7483>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker