I'm not familiar with that tool, but one thing I have noticed with some
3rd-party VMAF tools is the scores they generate aren't always accurate if
the material in question is not 1080p for the standard model, or 4k in the
case of the 4k model. So if your source is smaller than 1080p I wouldn't
On Mon, 9 May 2022 at 21:49, Clayton Macleod wrote:
> Using the official VMAF.exe is a bit more of a pain since you have to
> convert to yuv first, but being able to examine the results file is
> sometimes helpful. 75 sounds like something may still be off if the files
> don’t appear drastically
Using the official VMAF.exe is a bit more of a pain since you have to convert
to yuv first, but being able to examine the results file is sometimes helpful.
75 sounds like something may still be off if the files don’t appear drastically
different to your eye.
--
Clayton Macleod
If no one comes
So my question is, does libvmaf implementation do any kind of detection of
audio in the distorted asset before computing a perceptual video quality
score.
On Mon, 9 May 2022 at 13:37, Kamaldeep Tumkur
wrote:
> @Clayton, thanks for your response.
>
> It turned out that the external encoder was
@Clayton, thanks for your response.
It turned out that the external encoder was adding an audio track to the
encode. This was throwing the libvmaf scores off. On removing the audio
track and checking the encode, the score jumped from 25 to 77.64.
Now there is basis to compare the ffmpeg and the
I haven't looked at your files as I don't have the source file you're
using. I presume this is some public domain test file, is that right?
Anyway, if you use the official vmaf.exe you can output the comparison
results to a file to examine what the score was for each frame. Scrolling
quickly
Hello,
I'm new to the computation of VMAF scores using libvmaf in ffmpeg. While
trying out generating scores through libvmaf, I have an issue that I cannot
seem to find an explanation for.
I encoded the 'crowd_run' HQ MP4 with two different encoders. The resulting
files were compared with the
