Re: [FFmpeg-user] vf_lut3d supports type 3 ?

On Sun, 8 May 2022 at 22:28, Mahesh Pittala wrote: > Hello, > > I am trying to convert HLG to SDR using 3D LUT cubes freely distributed by > NBCUniversal. (3-NBCU_HLG2SDR_DL_v1.1.cube > < >

Re: [FFmpeg-user] vf_lut3d supports type 3 ?

On Mon, May 9, 2022 at 8:00 PM Mahesh Pittala wrote: > Hello Paul B Mohal, > > BBC has released different types of LUT's, attached the paper. Do you have > any plans to add support ? > I will repeat one last time. CUBE specification have not types of lut. There is only input/output range

Re: [FFmpeg-user] Disparity in VMAF scores

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

Re: [FFmpeg-user] Disparity in VMAF scores

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

Re: [FFmpeg-user] Disparity in VMAF scores

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

Re: [FFmpeg-user] Set MPEG-2 interlace flag without re-encoding

>Envoyé : vendredi 6 mai 2022 20:20 >À : ffmpeg-user@ffmpeg.org >Objet : [FFmpeg-user] Set MPEG-2 interlace flag without re-encoding > >I have an MPEG-2 video which is progressive but marked as interlaced, so video >players try to deinterlace it and ruin the quality. Is there a way to fix the

Re: [FFmpeg-user] Disparity in VMAF scores

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

Re: [FFmpeg-user] Disparity in VMAF scores

@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

Re: [FFmpeg-user] Pipe 360° content to VLC player

Am 30.04.2022 um 19:03 schrieb Michael Koch: Hello, I'm using this command line to capture 360° content from a Ricoh Theta V camera and pipe the live video to VLC player: ffmpeg -f dshow -i video="RICOH THETA V/Z1 FullHD" -f mpegts - | "C:\Program Files\VideoLAN\VLC\vlc.exe" - This

Re: [FFmpeg-user] Disparity in VMAF scores

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