Problem with correcting hue on older VHS tapes.
Greetings all - I searched the forums, but couldn't FIND the solution I was looking for. I would be grateful to anyone who redirects me.
I am restoring a number of different mediums. For my VHS transfers I use a JVC HR-S9911U. Whenever possible, I run VHS transfers through my Sony HVR-M25U MiniDV and record out on firewire through my PC. The below video was captured in this way, but a separate capture using a S-video Elgato resulted in the same effect. I have a few tapes from the early 1980s, which I know where recorded using a camcorder that ran a heavy cable back to a shoulder unit assembly with a VHS machine. Presumably, some of these videos struggled with the provided power, and there were intermittent problems in signal delivery. I have shortened this attached video to 6:30 for reference (https://drive.google.com/file/d/1IYc...ew?usp=sharing). I have the video in an uncompressed file format also. In the video at the 20 second mark the inside scene is overly magenta, but then corrects to a better (albeit faded) balance at the :58 mark. At 2:07 scenes in the kitchen are slightly yellow, but color is snapped back to normal outside at 3:16. At 4:45 the tint goes supremely wacky to a deep green, but then corrects back by 6:08. I don't know how to implement some of the coding scripts for adjustment in VirtualDub, but I already use that program a lot. I wouldn't expect an easy one-pass solution this, and am willing to chunk the video in separate parts, color correct as per separate needs, and then re-amalgamate into a finished video. The video only has so much resolution to start with, but I greatly would like to know how I might address these more-sensitive instances to make them look better. *Due to the size of uncompressed, .avi files, I would love to find a good compression codec to use. Unfortunately, my experience with Lagarthic has resulted in skewed hue/tint ruining the video. Any tips for lossless compression (outside of lossy mp4/mkv) would be greatly appreciated. In time I would expect to put these files into an AV1 container, but we're not there yet. *Yes - I know there are some aspects of jigger intermittently throughout the video, but outside of my standard TBC, I'm not sure there is much to do about that. Thanks! |
Quote:
Others will comment on the green cast appearing on the outdoor scene. The audio has a muffled sound probably due to a small "azimuth" misalignment of your deck to the recorded tape. The giveaway is a small improvement at camera edit points as the playback alignment momentarily improves (eg: 00:23 and 01:13) and the woman's voice becomes momentarily a little clearer but then reverts to the previously more muffled sound. There is also a constant high toned whistling in the audio. Since it doesnt change at the camera edit points like the voices do, it is probably not on the tape but has been introduced by the playback VCR. This occurs with some VCR's even though they can have excellent picture playback. |
To add, I see what you mean about the early overly magenta look seeming to correct itself. The early magenta cast seems to be more than just the room lighting as early on it's also magenta outside the room, seen through the large glass door.
|
Audio Whirring
Quote:
Notably, while the audio is not perfect - there is not whirring on my original avi file; somehow this was introduced when I created an .mp4 for sharing on the forum - I used OpenShot video editor for this ~ I wasn't sure how to save to a different file type in VirtualDub. |
I have a home video with the same problem. Unfortunately, it's a copy and the original is long lost, so it's possible that the process of copying introduced the problem which is now baked in. Is yours a copy also?
I'd like to think that capturing the original tape through a proper TBC would fix the problem, but someone with more experience would know for sure. Otherwise it's going to be scene by scene color correction which is a pain. |
Re the magenta hue in the first shot , possibly the camera used a tube sensor as the early ones did, and at first it hadn't quite warmed up and stabilized in color.
|
Quote:
|
Early magenta hue
Quote:
|
Quote:
Quote:
|
I think your a good client for this kind of plugin: https://www.youtube.com/watch?v=vWcoGuw3Z_I
assuming you want to fix all these frame quickly/efficiently. An avisynth pre process might be best |
Site design, images and content © 2002-2024 The Digital FAQ, www.digitalFAQ.com
Forum Software by vBulletin · Copyright © 2024 Jelsoft Enterprises Ltd.