If a AVT is so subtle that an observer can't tell it is on without comparing the exact same footage, why use one?
I'm trying to figure out which combination of svideo cable and AVT produces the best picture and removes the y/c crosstalk. After I have a cable and AVT that removes the y/c crosstalk, I will borrow the JVC HM-DSR100U for another comparison. I'm not testing audio. I think the syncing issues are in the software settings. Not the cables or player. "Earlier you mentioned you've been deinterlacing these videos. The videos seen so far are all telecined, not interlaced. Meaning that they are film-based, progressive video with hard coded 3:2 pulldown." Nothing posted in this thread has been deinterlaced. It has been specifically stated that I have not posted any deinterlaced files. The first post consist of raw captured avi files. The rest are captured with just Lagarith. |
No one said that you posted deintelaced videos. You simply stated earlier that you had deinterlaced some of your movies. The caution is to be careful about deinterlacing telecined video. None of the samples you've posted so far is standard interlace.
Quote:
s-video cables don't "remove" crossstalk. Luma and chroma are already separated before they enter the cable. Sometimes the output device doesn't always do a clean job of separating y and uv. The cable won't fix that. It's usually handled by y/c comb filters, not wires. Some of your samples have bad combing and aliasing effects. That's not crosstalk. That's just production or playback problems. |
Quote:
Quote:
|
I think a certain amount of rainbowing and dot crawl are inherent to VHS. Some time ago I looked at a diagram that showed the chroma information partly overlaps with the band where the luma is recorded on the tape, regardless of any S-Video cabling. So it's limited to particular frequencies. Assuming I understood the diagram properly.
|
That same luma-chroma overlay can also occur during playback with sloppy y-c separation, which I've seen in a number of players.
Quote:
As it is, there's what looks like old fashioned dot crawl in the right borders of the samples. Likely a production problem, because it doesn't appear in every shot. IMO opinion it looks like you're using the better player. It's up to you, but I don't think the DSR1000 can compete with the unit you used for the last 4 samples. That border stuff 's a little glitch that's visible, and better fixed by cropping off and replacing the dirty border. |
Quote:
|
5 Attachment(s)
Quote:
Compare Gold Series AVI frames 569 and 570, where I assume you used the tbc. Remnants of the boy's hands and other colors in frame 569 appear ghosted in frame 570: Gold Series AVi - frame 569: http://www.digitalfaq.com/forum/atta...1&d=1438609604 Gold Series Avi - frame 570: http://www.digitalfaq.com/forum/atta...1&d=1438609654 Neither a change of tbc nor a change of cable affrects this problem. Compare non-AVT "Gold Series no tbs" frames 441 and 442, where ghost images from the man's clothing and other objects in previous frame 441 appear in frame 442: Gold Series no tbs - frame 441: http://www.digitalfaq.com/forum/atta...1&d=1438609818 Gold Series no tbs - frame 442: http://www.digitalfaq.com/forum/atta...1&d=1438609898 Also note the black dots along the right borders of all these images, hwich appears in your oldedr posts, the newer posts, and almost all frames with or without a tbc (these are 2X blowups of a proportions of the right-hand border from each of the above images): http://www.digitalfaq.com/forum/atta...1&d=1438610033 The dots would appear to be either placed there in production or is maybe characteristic of the player. IF this happens on all tapes in that player, it's the player. Dot crawl doesn't appear in other parts of the frames. In any case, the tbc has no effect on either these problems. Chroma lag or ghosting is often an effect from aggressive chroma denoising, and can be a mastering problem in the source. Only way to tell is to play other tapes and/or use other players. Offhand I'd say the tape was created with those problems, as we see a lot of tapes that have that have these glitches, even retail jobs. |
It might be an issue with the player. I tested 4 different tapes from different years and I see similar results of varying degrees. Would damaged or dirty heads cause this? When I received the player it would not play tapes coherently. I had to clean the heads 3 or 4 times before it would play anything correctly.
for the sake of discussion, the other 4 clips. Same player, through the AVT, with Lagarith https://dl.dropboxusercontent.com/u/.../RoboTest1.avi https://dl.dropboxusercontent.com/u/...animetest1.avi https://dl.dropboxusercontent.com/u/...storyTest1.avi https://dl.dropboxusercontent.com/u/...storyTest2.avi |
Chroma ghosting is visible on all 3 color clips. You won't see it on the black and white clip unless you have transitions between grayscale and tinted segments (because luma and chroma are stored separately in YUV). The monochrome clip demonstrates that the temporal carryover is in chroma, not luma. The monochome clip does have mild magenta rainbows.
There's no magic in detecting these effects. Mount a video in VirtualDub and use the scroll controls to slow the video or watch frame by frame. Scene transitions are the easiest places to see these effects. |
borrowed a different vcr and purchased some bluejean cables for some more comparisons
All videos use Lagarith, bluejean svideo cables, and AVT JVC SR-V10U https://dl.dropboxusercontent.com/u/.../IronTest1.avi https://dl.dropboxusercontent.com/u/...PowerTest1.avi JVC SR-W5U https://dl.dropboxusercontent.com/u/.../irontest2.avi https://dl.dropboxusercontent.com/u/...PowerTest2.avi Also, some very simple scripting in avisynth Code:
AVISource("D:\Turbine2.avi") https://dl.dropboxusercontent.com/u/...rbineIVTC1.avi Code:
AVISource("D:\irontest.avi") https://dl.dropboxusercontent.com/u/...rbineIVTC2.avi IMO, the issues discussed so far are in the animated tape. I'm seeing the discussed issues on both players with better cables and a tbc. I think the second inverse telecined script works better than the first. I question if the training tapes were done on film and need inverse telecined. I'm still seeing issues around mouths and hands after inverse telecined. The JVC SR-V10U has darker playback and has more trouble with older tapes. |
Quote:
Quote:
Would it be possible to share the script you used in avisynth and the filters you used in virtualdub? Were the filters some of the ones that come in the forum download version of virtualdub? |
3 Attachment(s)
Quote:
I didn't post the scripts and VirtualDub settings earlier because (a) it took some real effort to clean up and color correct the clips. The noise and color aren't your fault, the tape is just a nightmare (welcome to VHS LOL!). And (b) I didn't think you'd go through all the trouble, but I'm used to it with some of my horrible tapes. The attached mpg is a new one. So here goes.... I used two scripts, an "A" script for the first 27 frames of the clip, and a "B" script for the rest of it. Like a lot of VHS issues, the first scene was so out of whack it looked like something from a different tape. No surprise, as I say. The "AB" script joins the two segments. Script "A" (first scene): Code:
Import("Drive:\Avisynth 2.5\plugins\HQdering.avs") Script "B" for the second segment: Code:
Import("Drive:\Avisynth 2.5\plugins\HQdering.avs") The "AB" script joins the two segments and doe final cleanup. No VDub filters were used. Saved as "IronGB_AB" with Lagarith YV12. Code:
vidA=AviSource("Drive:\path\to\IronGB_00A.avi").Trim(0,27) |
4 Attachment(s)
The SVR-10U and SR-W5U Hogarth clips use an unusual method to get to 29.97fps. They appear to be 25fps PAL film transfers with duplicate frames, then 2:2 blends applied for NTSC. They're a combo of dupes and blended frames. Consequently, you could use regular TIVTC to restore the film speed, or you could deinterlace first and use SRestore(frate=23.976) to get the same thing. It works here, but it might not work on other videos. I'd stick with TIVTC.
I'm not sure what your scripts were designed for, but it's been a long time since I saw anyone use Telecide, which has been replaced by TIVTC. I don't know what TDecimate(mode=1) was to accomplish; it seemed to work here (I haven't looked at every frame), but it's the long way around and is usually used for 15fps anime. All of the animation clips you posted were telecined or dupe-blended. The scripts won't work on the "power" videos. They're not telecined, they're interlaced. And not interlaced very well, either, with a lot of line twitter and buzzy edges. They look like either DV originals recorded to tape, or just sloppy production. I haven't had time to get into them yet. I thought the SRV-10U samples looked cleaner. The W5U oversharpens, oversaturates (especially red), and seems to have more chroma smear than the SR-V10U. Unfortunately the 10U can't be used for long-play tapes. The BJC cable seems to have cleaner color and good contrast without trying to blow out highlights. The difference over cheapo or OEM cables is subtle, but after a while you'll see what I mean. The two "Iron" clips and one of the power clips played with bad audio sync. I corrected sync in the attached "Iron" videos. The script for: "Iron1_SRV10U": Code:
AviSource("Drive"\oath\to\irontest1.avi") The script for "Iron2_W5U.mpg": Code:
AviSource("Drive:\path\to\irontest2.avi") -- merged -- Oops!!! There's a typo in the second script posted above for "Iron2_w5U". Sorry. Stayed up too late. Quote:
|
1 Attachment(s)
Hi sanlyn
LSFmod(strength=50,edgemode=2) LSF = LimitedSharpenFaster of Didée ? RemoveGrain V1.0 or V0.9 PR? either ... or... see screen |
LSFmod is an update of LimitedSharpenmFaster. I use both versions. Found here: http://www.digitalfaq.com/forum/vide...dsr100u-2.html. LSFMod has settings that emulate the old version.
I use Avisynth 2.6 and have both RemoveGrain v1.0b and the newer RGTools together in my plugins. Have had no problems. LSFMod requires some support files, listed on the web page link. GradFun2Dbmod can use either version of RemoveGrain, but as I say I have both versions installed. |
Quote:
'M Just a little dated Quote:
Avisynth 2.6 I have, actually I RGtools and RemoveGrain v1.0 [2007] With a test film I've applied your script execution course in VDub. Approximately 5fps ... is too slow for me. I now try with the YUV curve in Edius to get an equally good result. Of the 3 versions DeHalo_alpha_MT.avsi DeHalo_alpha_MT2.avsi DeHalo_alpha_cs.avsi I use the "MT" version. DeHalo_alpha_MT (rx = 2.5) is a compromise, it makes it more one sees strong Blur Here I actually only interlaced material. TGMC filters only when the film is in progressive, then go back again to interlaced. |
Quote:
The video was input to the encoder as progressive 23.976 fps. The encoder applied 2:3 pulldown flags for proper frame rate 29.97 fps during playback. Original script posted: Code:
AviSource("Drive"\oath\to\irontest1.avi") Code:
Video |
Quote:
Since I have to use first TGMC for filtering in Avisynth. ..deutsch to English is a horror. Quote:
Quote:
For example, a cutout Code:
ConvertToYV12(interlaced=true) Then, the film is processed in Edius more ... YUV curve .... etc |
Quote:
|
1 Attachment(s)
Optimist
I have here Promptly professional 9 Luckily have your one big serving of humor :D |
Site design, images and content © 2002-2024 The Digital FAQ, www.digitalFAQ.com
Forum Software by vBulletin · Copyright © 2024 Jelsoft Enterprises Ltd.