28.11.2025, 16:25
Wow, that was a really fast reply! 👍🙂
I did not attach debug data at first because I got it working with the Vapoursynth version; but since you seem to have the time to look into this, here comes some documentation ... 😉
I am attaching a video with a short sample of two scenes as well as some Hybrid log outputs; the numbers refer to the various stages of my workflow:
1 - Original AVI source.
2 - Deinterlacing with QTGMC in Hybrid; the log shows that Hybrid aborted, but could be restarted from the WAITING state. This step already removed some of the excessive grain. Using a very high bit rate to minimise quality loss in the many workflow steps.
3 - Creating a sequence of PNG frames using FFMPEG and retouching many of them.
4 - Using FFMPEG again to recombine the retouched PNG frames to the attached MP4.
5 - Applying TemporalDegrain2 in Hybrid to remove the remaining grain without losing too much structure and clarity. The log shows that this did not work at all in the Avisynth version, whereas it worked well in Vapoursynth.
My problem is the loss of detail in larger areas like the road surface, e.g. towards the end, top left. The subsequent MP2 coding for DVD authoring will remove even more small features, creating just a cloudy area without any detail, so I would like to reduce the strength of the degraining even further. Maybe it will be sufficient to use the less aggressive settings listed in the TemporalDegrain2 documentation; if that is not enough, they suggest using outputStage and postMix, but these are not available in the GUI. So I will try your "Custom" suggestions to access those options when I find the time.
Thank you!
I did not attach debug data at first because I got it working with the Vapoursynth version; but since you seem to have the time to look into this, here comes some documentation ... 😉
I am attaching a video with a short sample of two scenes as well as some Hybrid log outputs; the numbers refer to the various stages of my workflow:
1 - Original AVI source.
2 - Deinterlacing with QTGMC in Hybrid; the log shows that Hybrid aborted, but could be restarted from the WAITING state. This step already removed some of the excessive grain. Using a very high bit rate to minimise quality loss in the many workflow steps.
3 - Creating a sequence of PNG frames using FFMPEG and retouching many of them.
4 - Using FFMPEG again to recombine the retouched PNG frames to the attached MP4.
5 - Applying TemporalDegrain2 in Hybrid to remove the remaining grain without losing too much structure and clarity. The log shows that this did not work at all in the Avisynth version, whereas it worked well in Vapoursynth.
My problem is the loss of detail in larger areas like the road surface, e.g. towards the end, top left. The subsequent MP2 coding for DVD authoring will remove even more small features, creating just a cloudy area without any detail, so I would like to reduce the strength of the degraining even further. Maybe it will be sufficient to use the less aggressive settings listed in the TemporalDegrain2 documentation; if that is not enough, they suggest using outputStage and postMix, but these are not available in the GUI. So I will try your "Custom" suggestions to access those options when I find the time.
Thank you!