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  #21  
05-26-2022, 02:00 PM
FinnTape79 FinnTape79 is offline
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AND ONE NEW THING TO THIS DISCUSSION: Is the VHS sound more wide are more bright? It goes all way up to 20kHz compared to youtube AAC "saving" faking compression. See attached picture VHS_vs_YOUTUBE_AAC.png. I capture 48.000Hz PCM (CD-quality and over).

[QUOTE=lollo2;84958]The second capture is bad, and many even+odd fields show the "weird" pattern (hum bars?)
A possible solution here: https://forum.videohelp.com/threads/...-how-to-remove
[END OF LOLLO2's quote]

Good findings. It is tricky that these "wondering lines" error lines seems even more visible in the latter half. It isn't there visible all the time. Depends on the scene and movement. May be even camera specific. Seems like some signal transmission error/interference. It may be NTSC -> PAL transformation. Maybe this was a live TV forecast back in 1983. Even in Queen Wembley 1986 you'll see some parts with wondering lines. If the error occurs continuously I could assume it is due to my own equipment like recorder, tuning of the channel. If it was winter, some snow in the air (in Finland it snows during the winter - sometimes heavily). Those wondering lines occur in certain changes. It may be the original: Live in the Regal Theatre 1983... Those days all kinds of weird interferences were common. Good 'ol 50Hz humm etc.

Other source of the same concert: https://www.youtube.com/watch?v=ob-G...qmYIaLDb1kM-_g
Those wondering lines are there at the times like mine... So the interference seems to be a FEATURE in that show's multicam production. May be one or two cameras and some others cleaner. Dunno.


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File Type: png VHS_vs_YOUTUBE_AAC.png (116.0 KB, 4 downloads)
Attached Files
File Type: avi ThinLizzy_lines_wondering_lines_longer_x264.avi (84.65 MB, 1 downloads)
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  #22  
05-26-2022, 04:12 PM
latreche34 latreche34 is offline
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If you upload 480p to youtube it will butcher your video, Upscale to 1440x1080p and upload. Also if you encode and upload it adds an extra layer of quality loss, Uploading lossless AVI HuffYUV takes longer but gives the best quality since there is only one time encoding by youtube.

https://www.youtube.com/user/latoak34/videos

Last edited by latreche34; 05-26-2022 at 04:23 PM.
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  #23  
05-28-2022, 04:18 PM
FinnTape79 FinnTape79 is offline
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Genesis Shipwrecked: https://youtu.be/gnlMs3tYbnY

Opinions: This time Vevo Youtube colors are vivid but the detail is overly softened mush. They have stretched it to 16:9 so my original 4:3 is bad to compare 1:1... And my version has more halo in the bright edges. It may be the VHS player, cables are normal quality. They shouldn't cause double vision etc. Seems like a color isn't in the right spot between the black & white information. That rainbowing Cnr2 function is also used. Not using it for every video.

Again stuff. So the capture card is HP SkyHawk H789 based on Conexant and some CX23888 variable. Here is Genesis capture and conversion. This time the main functions were:

Cnr2(mode="oxx", scdthr=10.0, ln=35, lm=192, un=47, um=255, vn=47, vm=255, log=false, sceneChroma=false)
QTGMC (Preset="Slow")
TemporalDegrain2(degrainTR=2,postFFT=0)
TTempSmooth(maxr=4, strength=5, lthresh=6, cthresh=6, lmdiff=8, cmdiff=10)
dfttest(sigma=1, tbsize=1)

Slight smiley curve EQ added. Some +1.5dB <60Hz low and +1dB some highs...

Last edited by FinnTape79; 05-28-2022 at 04:30 PM.
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  #24  
05-28-2022, 09:02 PM
latreche34 latreche34 is offline
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The aspect ratio is totally wrong on that video clip linked above.

https://www.youtube.com/user/latoak34/videos
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  #25  
05-29-2022, 04:06 AM
lollo2 lollo2 is offline
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TemporalDegrain2 and TTempSmooth are somehow equivalent. In general, only 1 of them is needed.

If really needed, for a spatial denoise after a temporal denoise you can use KNLMeansCL instead of dfttest, inside TD2 with option postFFT=4, or in standalone if you want full control of its parameters.

A channel on S-VHS / VHS capture and AviSynth restoration https://bit.ly/3mHWbkN
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  #26  
Yesterday, 02:00 PM
FinnTape79 FinnTape79 is offline
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Here's the latest from my archive... The wondering lines were in the TV broadcast. Best details on the Youtube by now... 480p is so poor. This is upscaled with Shotcut. Just put 1440x1080 in and 16:9 aspect ratio. Video itself is 4:3

https://youtu.be/8cmJlmjsyDc

Thin Lizzy's Holy War. It seems to be mono. Broadcast was stereo because the Rock theme intro had discrete Left/Right sounds... 1983.
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  #27  
Yesterday, 04:06 PM
latreche34 latreche34 is offline
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Your aspect ratio is wrong, Skinny people. If you don't want to do the math for 16:9 ratio with added black pillars the easiest way is to crop to 704 and resize to 1440, the proportions will work themselves out.

https://www.youtube.com/user/latoak34/videos
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