Quantcast Restoring hi8 tapes - digitalFAQ Forum
  #1  
04-25-2021, 07:42 AM
sallustius sallustius is offline
Free Member
 
Join Date: Apr 2021
Location: The Netherlands
Posts: 6
Thanked 0 Times in 0 Posts
I am capturing some old hi8 tapes and Im struggling to find out how to improve the quality. For playback I use a DRV-TRV235E, which works great, and for capture I use the hauppauge usb-live2.

The problem is that the capture looks too dark to me and the colors a bit flat. I use the camcorder's lcd for reference and there the image looks much more lively so to say.

I have added a sample. Sometimes the images gets really dark and it becomes hard to see any detail. Especially at the end of the clip

Is the recording done incorrectly or can I fix this in avisynth? If so how? Something with the levels and gamma?

I am a complete newbie to this and avisynth is still somewhat puzzling. From what I get from the histograms, the image should be within bounds. But I may be reading them wrong.

Also two other things I just noticed. When I trimmed a clip in virtualdub to share here I applied huffyuv again otherwise the filesize would just be enormous. Is that ok? And I just noticed that audio is out of sync. I will have to look into that as well...


Attached Files
File Type: avi sample.avi (75.47 MB, 7 downloads)
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Ads / Sponsors
 
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
04-25-2021, 08:45 AM
stymie stymie is offline
Free Member
 
Join Date: Jun 2020
Posts: 21
Thanked 9 Times in 7 Posts
If trimming a clip in Virtualdub, select Video, then Direct Stream copy and it will save the clip in current video format.
Reply With Quote
The following users thank stymie for this useful post: sallustius (04-25-2021)
  #3  
04-25-2021, 09:34 AM
sallustius sallustius is offline
Free Member
 
Join Date: Apr 2021
Location: The Netherlands
Posts: 6
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by stymie View Post
If trimming a clip in Virtualdub, select Video, then Direct Stream copy and it will save the clip in current video format.
Thanks! Here is a reupload. That makes a difference in filesize.


Attached Files
File Type: avi sample.avi (46.92 MB, 3 downloads)
Reply With Quote
  #4  
04-25-2021, 10:14 AM
lollo2 lollo2 is offline
Free Member
 
Join Date: Mar 2013
Location: Italy
Posts: 217
Thanked 47 Times in 44 Posts
Quote:
I use the camcorder's lcd for reference
How does it look on your TV?

I have the same card and never experienced this behavior, but I only capture s-vhs tapes recorded from digital TV broadcast.

The histogram is within the proper limits; however is very flat in a large region.

sample.jpg

You can use a filter like HDRAGC to "improve" the dark regions, but be careful because it may introduce ugly effects.

Attached an example, using also some denoise and sharpening.


Attached Files
File Type: mp4 sample-muxed.mp4 (3.10 MB, 9 downloads)
File Type: avs sample.avs (2.4 KB, 7 downloads)
Reply With Quote
The following users thank lollo2 for this useful post: sallustius (04-25-2021)
  #5  
04-25-2021, 01:23 PM
timtape timtape is online now
Free Member
 
Join Date: Sep 2020
Location: Perth, Western Australia
Posts: 170
Thanked 39 Times in 36 Posts
The main problem with the clip is that the important detail, the people, is underexposed partly because the white handkerchief and then the bright window affected the camera's exposure. A solution would have been to switch the camera to manual exposure at time of shooting. Many home movies are plagued with this problem. We can't "restore" dark detail which was not captured by the camera.

Last edited by timtape; 04-25-2021 at 01:52 PM.
Reply With Quote
  #6  
04-26-2021, 01:53 PM
sallustius sallustius is offline
Free Member
 
Join Date: Apr 2021
Location: The Netherlands
Posts: 6
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by lollo2 View Post
How does it look on your TV?

Attached an example, using also some denoise and sharpening.
Thanks! Your script is also really helpful to get me started on avisynth. I have attached a recording of my phone of the camcorder to get a sense of the difference. I also watched my capture on the TV yesterday and it actually looks pretty good.



Quote:
Originally Posted by timtape View Post
The main problem with the clip is that the important detail, the people, is underexposed partly because the white handkerchief and then the bright window affected the camera's exposure. A solution would have been to switch the camera to manual exposure at time of shooting. Many home movies are plagued with this problem. We can't "restore" dark detail which was not captured by the camera.
I also think that it may just be the recording that is not that great.


So am I correct that the capture is ok, and that I can only alter things in avisynth?


Attached Files
File Type: mp4 PXL_20210426_184313793.mp4 (2.24 MB, 8 downloads)
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Restoring 8mm/Hi8/VHS VirtualDub captures? willow5 Restore, Filter, Improve Quality 35 03-26-2019 09:46 PM
VCR Help: Restoring EP VHS recordings to DVD imacoltfan Restore, Filter, Improve Quality 16 07-26-2012 05:33 AM
Restoring old VHS Tapes using BMD Intensity Pro fnub Capture, Record, Transfer 5 02-20-2012 09:33 PM
Restoring Audio in AC3 format? Superstar Restore, Filter, Improve Quality 11 10-08-2010 02:59 AM
MP2 to WAV question, restoring audio Superstar Restore, Filter, Improve Quality 5 06-15-2009 11:01 AM

Thread Tools



 
All times are GMT -5. The time now is 01:48 PM