Re: [FFmpeg-trac] #7588(avfilter:new): Incorrect VMAF score computation

[FFmpeg]

#7588: Incorrect VMAF score computation
+
 Reporter:  Ilya87  |Owner:
 Type:  defect  |   Status:  new
 Priority:  normal  |Component:  avfilter
  Version:  git-master  |   Resolution:
 Keywords:  libvmaf |   Blocked By:
 Blocking:  |  Reproduced by developer:  0
Analyzed by developer:  0   |
+

Comment (by Ilya87):

 Part 2 of this bug:
 https://mega.nz/#F!61VEFQwB!wUEggqchsrYqDDgogCb2Ng

 ffmpeg -i klk.mkv -i klk_reference.mkv -lavfi
 
libvmaf="model_path=/usr/share/model/vmaf_v0.6.1.pkl:pool=mean:log_path=vmaf.log"
 -f null -

 VMAF score nan, 0 score for frames also appears. klk16.mkv - yuv420p10le,
 klk16_reference.mkv - yuv420p.

 2 files are absolutely valid matroska files.

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Re: [FFmpeg-trac] #7588(avfilter:new): Incorrect VMAF score computation

[FFmpeg]

#7588: Incorrect VMAF score computation
+
 Reporter:  Ilya87  |Owner:
 Type:  defect  |   Status:  new
 Priority:  normal  |Component:  avfilter
  Version:  git-master  |   Resolution:
 Keywords:  libvmaf |   Blocked By:
 Blocking:  |  Reproduced by developer:  0
Analyzed by developer:  0   |
+

Comment (by Ilya87):

 If I remux Sintel_x264_2pass_5000_1.mkv using mkvmerge
 (Sintel_x264_2pass_5000_1_mkvmerge in folder above), ffmpeg shows right
 results, so the question is - it is a bug of
 Haali Matroska Writer b0 (that is used by x264) or matroska demuxer in
 ffmpeg?
 MKValidator shows 2 warnings for Haali Writer muxed file:
 WRN801: The segment has no SeekHead section
 WRN800: The segment has Clusters but no Cues section (bad for seeking)
 Can this be the reason for bad computation and is it possible (needed) to
 adopt ffmpeg demuxer for this case?

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Re: [FFmpeg-trac] #7588(avfilter:new): Incorrect VMAF score computation

[FFmpeg]

#7588: Incorrect VMAF score computation
+
 Reporter:  Ilya87  |Owner:
 Type:  defect  |   Status:  new
 Priority:  normal  |Component:  avfilter
  Version:  git-master  |   Resolution:
 Keywords:  libvmaf |   Blocked By:
 Blocking:  |  Reproduced by developer:  0
Analyzed by developer:  0   |
+

Comment (by Ilya87):

 Reproducible https://mega.nz/#F!H4dB0Q6b!ZKWRMQjFOnNL2WhAI8fNbA

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Re: [FFmpeg-trac] #7588(avfilter:new): Incorrect VMAF score computation

[FFmpeg]

#7588: Incorrect VMAF score computation
+
 Reporter:  Ilya87  |Owner:
 Type:  defect  |   Status:  new
 Priority:  normal  |Component:  avfilter
  Version:  git-master  |   Resolution:
 Keywords:  libvmaf |   Blocked By:
 Blocking:  |  Reproduced by developer:  0
Analyzed by developer:  0   |
+

Comment (by cehoyos):

 This issue is not reproducible with smaller files?

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Re: [FFmpeg-trac] #7588(avfilter:new): Incorrect VMAF score computation

[FFmpeg]

#7588: Incorrect VMAF score computation
+
 Reporter:  Ilya87  |Owner:
 Type:  defect  |   Status:  new
 Priority:  normal  |Component:  avfilter
  Version:  git-master  |   Resolution:
 Keywords:  libvmaf |   Blocked By:
 Blocking:  |  Reproduced by developer:  0
Analyzed by developer:  0   |
+

Comment (by Ilya87):

 Reference
 https://mega.nz/#F!23Y0UCzZ!xawr1sqKenlY2WwClls14w
 Sintel1090.mkv
 Encoded
 https://mega.nz/#F!Xm5QzC5D!KHy1uasIuN_y3iElS259DA!OqoUHKjS
 Sintel_x264_2pass_5000.mkv

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Re: [FFmpeg-trac] #7588(avfilter:new): Incorrect VMAF score computation

[FFmpeg]

#7588: Incorrect VMAF score computation
+
 Reporter:  Ilya87  |Owner:
 Type:  defect  |   Status:  new
 Priority:  normal  |Component:  avfilter
  Version:  git-master  |   Resolution:
 Keywords:  libvmaf |   Blocked By:
 Blocking:  |  Reproduced by developer:  0
Analyzed by developer:  0   |
+
Changes (by cehoyos):

 * keywords:  vmaf => libvmaf


Comment:

 Isn’t the used input file needed to reproduce?

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