Looks ~ok. Go ahead. I am away from home for a couple of days now with no access to my desktop PC.
And don't focus too much on a single scene or screenshots only. Include daylight scenes with darks and brights in your tests to find the settings compromise. Avisynth's (or ffmpeg's) histogram and waveform monitor are the tools for more detailed analysis.
Next step would probably be post-processing.
Try StreamFab Downloader and download from Netflix, Amazon, Youtube! Or Try DVDFab and copy Blu-rays!
+ Reply to Thread
Results 31 to 48 of 48
Thread
-
Last edited by Sharc; 10th Sep 2024 at 17:39.
-
Hey Alwyn,
so I used the method as per your guide. Changing contrast has the exact effect that you specified - however, changing brightness never really changes anything on the left hand side "no go zone" (see screenshots). The video itself obviously changes in brightness massively. Thanks.Last edited by Bermuda1; 10th Sep 2024 at 14:53.
-
@Bermuda1: FWIW here the waveform monitor of your capture 1.2....avi of post#30. You can see that the wavy signal below the picture fluctuates nicely between 16 (darks) and 235 (brights), so the contrast setting reduction from 128 to 120 was nearly perfect. No need to change anything.
(Perhaps set the contrast to 119, just nitpicking )
Added: Also, the RGB clipping at 255 is very moderate only. You are good to go.Last edited by Sharc; 10th Sep 2024 at 18:06.
-
@Bermuda, your first histogram is better, Brightness-wise. But because the Brightness moves the whole histogram to the right, you need to then lower the contrast to bring the right end back, out of the red.
So, set the left edge first with brightness, then adjust the right edge with the contrast.
I do find that bumping up against the left end is OK, whereas the right edge must be kept inside the red. As Sharc mentioned, you can fine-adjust the "levels" in post-processing, so if your captures need a little more contrast, that can be adjusted.Last edited by Alwyn; 13th Sep 2024 at 01:35. Reason: Spelling and got my lefts and rights mixed up! Contrast controls the right end.
-
While "Brightness" usually shifts the entire histogram towards left (darks) or right (brights), the reaction on "Contrast" depends on the capture device/driver. Some fix the dark level and shrink/expand the brights from there, others fix the center level and shrink/expand darks and brights relative to the center.
Also, when fiddling with contrast one may have to readjust the saturation as well in order to prevent excessive out-of-gamut values (e.g. clipped RGB upon conversion). -
Thanks. This has been incredible helpful and I am very happy with the video settings.
After recapturing, I now face the issue that audio and video are not in sync. I attached my "Timing" settings and "Disk I/O" settings. What am I doing wrong? -
So I now tried using AmarecTV instead of VirtualDub. Followed the instructions as per www.aaproductions.net/amarectv.htm. Used Graphstudionext to ensure I keep the same settings for contrast etc. as above. No issues with audio or video sync in AmarecTV !
-
-
Want my help? Ask here! (not via PM!)
FAQs: Best Blank Discs • Best TBCs • Best VCRs for capture • Restore VHS -
Thanks for the suggestions. Unfortunately, it did not have any noticeable impact. There is still a massive lag between video and audio when I use VirtualDub.
-
@Aramkolt, re waveforms, here are some in AVISynth codes (remove the # for the one you want to use; the crop is to remove the black bits so they don't interfere):
LSMASHVideoSource("yourfile.mp4") #that's for an MP4, use AVISource for analogue AVIs.
ConvertToYV16()
#Crop (clip, int left, int top, int -right, int -bottom, bool "align")
#Crop (10, 0, -16, 0)
#Waveform across the top of the video:
#TurnRight().Histogram().TurnLeft()
# waveform on side:
#Histogram()
#Coloured Histogram on right:
#Histogram("levels") -
So I've got my video files in the HuffYuv format now. Can someone redirect me to a thread in this forum (Search not that helpful) or help me out in figuring out which software to use to post process the files? My standard software, DaVinci Resolve (free version) does not support .avi in huffyuv. Thanks!
-
Avisynth+, for example.
For davinci and other NLEs which cannot open .avi convert (export) it to ffv1 (lossless) using ffmpeg for example.Last edited by Sharc; 15th Sep 2024 at 11:24.
-
I have another issue that I cannot explain myself. On the newer, more recent HI8 tapes, I see a difference between DV and S-Video capture regarding the borders. The S-Video capture somehow has black borders...see the attached screenshots (left = DV; right = S-Video). I also attached my AmarecTV settings, where the correct format for PAL video tapes (720x576) is selected. No cropping selected, from what I can tell (see screenshot). Why would it create these black borders? Any clue? Thanks!
Last edited by Bermuda1; 17th Sep 2024 at 16:49.
-
-
Ok, it’s all making more and more sense to me. Let me try to rephrase what I understand from your post:
- the black borders while capturing S-Video are fine as it should capture in 12:11
- in post-processing I then crop to 704 (no more black borders) and then encode as 4:3
Am I on the right track?
So a more general question would be, why is this not the case / necessary for DV? Is that just a „feature“ of the codec / of capturing via FireWire? It appears that there is more information on the right and left that is incorporated in the DV as it does not capture in 12:11.is this not a disadvantage of S-Video then?
Thanks for your help, again!
Similar Threads
-
List of Sony Handycam Digital8 camcorders with analog/digital passthru
By Brad in forum Newbie / General discussionsReplies: 18Last Post: 9th Sep 2024, 19:54 -
Remaining blocking artefacts on capturing Digital8
By Waver in forum CapturingReplies: 2Last Post: 11th Dec 2023, 05:37 -
about analog pass-through capturing method...
By kamaleon in forum CapturingReplies: 66Last Post: 3rd Oct 2023, 03:30 -
Capturing Digital8 using Sony DCR Firewire/IEEE 1394 port - scrambled image
By Colek in forum CapturingReplies: 22Last Post: 24th Aug 2021, 00:42 -
Getting back into Capturing, Setup Advice
By Smack2k in forum CapturingReplies: 6Last Post: 5th Dec 2019, 20:02