How do I suppress so many compression artefacts without killing quality?

[DMFOREVER98]

Interlaced video, with compression artifacts like blocking artifacts that stand out when the lights reflect the camera, with a resolution of 352x576. I was thinking of using artificial intelligence, but I don't know what filters can make this video look better before rescaling, and I don't know which model would be the best either.

[Attachment 85830 - Click to enlarge]

[Attachment 85831 - Click to enlarge]

[Attachment 85832 - Click to enlarge]
The fragment was cut with avidemux without re-encoding

The concert is over 1 hour long, unfortunately I can't upload it in full but basically it contains all those compression artefacts and gradually depending on the scene it increases the block artefacts, something I have not been able to solve correctly in any video I have tried to improve visually apart from this one in particular.

File: X:\X\X\X\fragment.mkv | Format: Matroska v4 | Size: 29.4 MiB | Duration: 1:20 min | Bitrate: 3 054 kb/s
Encoded with: Lavf58.76.100

Video
- Format: MPEG-2 (Main@Main, BVOP, Custom Matrix)
- Resolution: 352x576 (4:3, PAL) | FPS: 25.000 (Constant) | Scan: Interlaced (Top field first)
- Bitrate: 2 994 kb/s (Max: 3 060 kb/s) | Compression: Lossy
- Stream size: 28.7 MiB (98%) | Default: Yes | Forced: No
- First frame timecode: 01:33:55:05 (Closed GOP)

[davexnet]

Are you bob deinterlaciong? Something else? What have you tried?

[DMFOREVER98]

Are you bob deinterlaciong? Something else? What have you tried?

For interlacing I'm using QTGMC(preset=‘Slower’) visually it has no problems after that, however the blocking artifacts and resolution sucks, it's very bad quality and most likely if I try to remove the blocking artifacts it will look terrible, even with artificial intelligence the quality is fluctuating it's very difficult to make the video visually stable without adding more artifacts from removing them. I think it's going to be tricky, but I'll wait for some responses to this thread.

[Sharc]

You may try something like

ffms2("fragment.mkv")
assumeTFF()
QTGMC(preset="fast")
#ChromaShiftSP(1,1)  
DeBlock_QED()  #tweak as needed
MCDegrainSharp()
spline36resize(768,576)

[Selur]

Playing around (with a way too slow script),..

Cu Selur

[DMFOREVER98]

You may try something like

ffms2("fragment.mkv")
assumeTFF()
QTGMC(preset="fast")
#ChromaShiftSP(1,1)  
DeBlock_QED()  #tweak as needed
MCDegrainSharp()
spline36resize(768,576)

Interesting script, considering that BasicVSR is not used.

Playing around (with a way too slow script),..

Cu Selur

It's a great result, considering how it looked before is wonderful, what I don't know if you can improve the resolution to for example 1440 x 1080 to make it look even better (maybe), also my pc is so bad that it will be impossible to process the whole video or at least a song with that script, greetings.

[Selur]

I doubt upscaling will help make it look better, since there are not really details to enhance.
You would need something that adds meaningful details and by temporal consistent.