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Weird interlacing problem when capturing video, see pic
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AGwolf
Junior Member
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18. January 2010 @ 22:46 |
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I'm having issues with the video codecs on my computer (I think). I don't know a lot about this stuff but when you -first- capture video, it goes through a filter of some sort which processes the image into the visual picture that we see/recognize on the screen.
I wasn't having any issue UNTIL I installed the "K-Lite codec package." They work really well in conjunction with that program "Super" when encoding and compressing video, but unfortunately this occurs:
http://img9.imageshack.us/img9/525/43578967.jpg
(150k-ish image)
I am under the impression that the codec used for video capture processing is "ffdshow" or something, and i've tried to play with the configuration settings (enabling deinterlacing and stuff), but to no avail. And usually in subsequent processing, you can change a video from interlaced to progressive and it will get rid of those kind of lines, but it doesn't work now- one frame of video looks like that even when in progressive mode.
Any ideas? I set a restore point before I installed the codec pack, but it still seems to have done its damage, and now any capture from the card looks like that :/
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Senior Member
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20. January 2010 @ 12:09 |
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You've given next to no details about your process,
but I will say, the pattern your JPG shows is what you typically get
when you resize an interlaced image without first de-interlacing.
This message has been edited since posting. Last time this message was edited on 20. January 2010 @ 12:10
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AGwolf
Junior Member
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20. January 2010 @ 18:39 |
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Apologies;
I'm using a Kworld DVD maker PCI VS-L883D
http://www.kworld-global.com/main/prod_i...d=16&prodid=103
When I FIRST reformatted my computer, I had no issues with recorded video... I record direct uncompressed AVI from the card's S-Video input.
The problem I have occurs after I install that K-Lite Codec Pack, which is essentially a metric f*ck-ton of assorted standard audio and video codecs... it makes it a lot easier than spending 2 hours on the internet finding each individual one.
Any subsequent recordings I make look like the image that I posted; and when I process the video, the "deinterlaced" version looks fuzzy and you see ghost/dual images where-ever the interlace separation is as drastic as that screenshot.
I can't seem to uninstall and wipe the codecs and the PCI card's original drivers, so I have to start fresh again to do more testing, but before I did that, I had wanted to see if there was any way to fix the capture card's output. It's as if the card is out of sync or something
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Senior Member
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20. January 2010 @ 19:10 |
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What format choices does the capturing app. give you?
Have you tried any of the other choices, MPG, etc,etc.
What resolutions?
What device are you capturing from?
Is it a game console ?
Is the jpg you posted a screen shot from the uncompressed capture?
It's an odd resolution, how did that come about ?
(It's apparently 884*669 pixels)
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AGwolf
Junior Member
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20. January 2010 @ 19:27 |
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MPG1, mpg2, other assorted crap - I'm looking for highest quality recording, so I chose AVI (uncompressed). I just tried two other capture/recording apps, both with more features and options, and the same issue occurred
Haven't tried the other options; not worth trying since I didn't have this problem initially
640x480, I don't see the need to record at a lower resolution, and the card's max is 720x480, which would stretch the content
Device? as in what is the hardware in my machine or where is the video coming from?
This happens to be a Saturn, but this same issue occurred with a PS2, PS3, Xbox, and Xbox 360 when I tried them
It was not from the uncompressed capture.
It was an odd resolution because there was a black border/padding around the physical image.
here is a capture of the uncompressed video, one I just did now with a different capture app:
http://img130.imageshack.us/img130/113/85424715.jpg
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Senior Member
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20. January 2010 @ 19:54 |
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It doesn't look as bad as the first. It's dimensions are
663*556 pixels. If it came from the unmodified avi captured
at 640*480 (or 720*480), shouldn't the JPG have one of those
resolutions?
As I mentioned in my first post, it looks suspiciously like
a resizing of an interlaced image, which is almost always bad.
Here's something to try, download the "viewfields" virtualdub
filter and open the avi in virtualdub. Activate the filter,
(video/filter/viewfields), and it will unfold the fields,
one on top of the other on the right side.
Do the two unfolded fields still show the combing pattern?
http://www.softpedia.com/progDownload/Vi...oad-113753.html
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AGwolf
Junior Member
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20. January 2010 @ 20:21 |
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I am simply doing a full 1920x1080 screen cap, pasting it into photoshop, and cropping the WMP window. Disregard what the jpeg resolution is, the video itself is 640x480, and there is a black border around the edges of the image as it comes from its original source.
I assure you it is not a resizing of an interlaced image
I have vdub installed but I dont think I've got that filter. I just tried to download it but I was greeted with a 404 :/
also, here's another screencap at MPG2 encoding from my xbox:
http://img63.imageshack.us/img63/6013/mpg2.jpg
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Senior Member
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20. January 2010 @ 20:36 |
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AGwolf
Junior Member
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20. January 2010 @ 21:05 |
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not exactly sure how the vdub thing is supposed to work, but this is the kind of output I got:
http://img191.imageshack.us/img191/8643/13351975.jpg
270kb
and I would post a segment of the video if I had somewhere to upload; do you have AIM or something?
I'm sitting here thinking about this- could it possibly be due to the source video stream not having the same FPS as the capture program? This game runs at about 20 FPS... I tested it on Sonic (and a different xbox game) which ran at 60fps... and both of these had the interlacing issue.
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Senior Member
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20. January 2010 @ 21:12 |
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Post a section to one of the many file hosting sites,
for example this one:
http://www.mediafire.com/
It doesn't look as if the viewfields filter is active,
it should look something like this:
PS it's possible it's a framerate mismatch. Try capturing from
a vcr or some other device to see if the problem is resolved.
This message has been edited since posting. Last time this message was edited on 20. January 2010 @ 21:16
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AGwolf
Junior Member
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20. January 2010 @ 21:16 |
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This message has been edited since posting. Last time this message was edited on 20. January 2010 @ 21:17
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AGwolf
Junior Member
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20. January 2010 @ 21:29 |
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http://www.megaupload.com/?d=ZQTC4DY8
fair warning, the audio is kind of loud.
edit: it's an extremely short clip, but you can still see the interlacing issue.. I didnt want it to get too big, its only like 12 megs
This message has been edited since posting. Last time this message was edited on 20. January 2010 @ 21:31
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Senior Member
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20. January 2010 @ 21:37 |
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Look at the fields on the right. Neither of them have the combed
pattern, the viewfields show that the 2 split images are clean.
You can see how viewfields can be useful to see
what is really going in.
However, trying to de-interlace this would be extremely difficult
by merging the fields, because the fields are so different.
I've got to believe individuals who are experienced at capturing
from a console would know how to handle this special case.
Off the top of my head perhaps you can split the fields,
resize and double
the frame rate - depends on your intended usage as to whether
this is feasible.
What does virtualdub say the resolution and frame rate is
(file/info)
Post your clip, I'd like to see it.
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AGwolf
Junior Member
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20. January 2010 @ 21:49 |
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according to this screenshot I posted before:
http://img97.imageshack.us/img97/5369/84935184.jpg
it says
640x480, 30.861fps, internal DIB decoder, 390 frames (0:12.63), 390 keyframes
The video clip i posted is from another game, but captured the exact same method.
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Senior Member
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20. January 2010 @ 22:15 |
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AGwolf
Junior Member
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20. January 2010 @ 22:29 |
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Senior Member
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20. January 2010 @ 22:50 |
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It's possible, although I've never used those FFDS filters.
I Guess it applies the filter during decoding ?
This message has been edited since posting. Last time this message was edited on 20. January 2010 @ 22:52
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AGwolf
Junior Member
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20. January 2010 @ 22:58 |
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it applies the filter during "encoding."
while it doesn't actually do any data compression, it processes the image/video stream.
That specific filter/option increased the number of frames but maintained the same playback rate, so the video played at half speed. I tried a different one and it seemed okay ,but the video was slightly choppy. Im gonna run the Saturn through that filter and see how it fares.
I really appreciate the back-and-forth you've provided... even if I still haven't come to the root of the problem, thank you much for kinda sticking through some of the troubleshooting. If I still can't get any satisfactory result in the next couple days, i may still reformat the computer and see where that takes me
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Senior Member
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20. January 2010 @ 23:19 |
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Thanks for the info. Seems that the real problem is the interlaced
image from the game console. The 2 fields within the frame
are so different, any attempts to use a frame as a flat image
is impossible. So splitting the fields seems appropriate.
In interlaced footage from VHS (or similar) the fields are usually
blended into one during de-interlacing, since they'reso close
together.
I'm not sure if I have my FFDShow setup properly, I don't understand
how to invoke those filters during encoding.
I created a generic xvid with a 4cc that WMP uses FFDShow to play it
back. I can use those filters in realtime while the video is playing
to affect the image.
How are you using it? Capturing uncompressed then recompressing
using FFDS?
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AGwolf
Junior Member
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21. January 2010 @ 18:00 |
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Oh I can make it filter the video during playback, but all it does is blend the interlaced frames together, causing that ghosting effect.
Yes, I was capturing uncompressed then processing through different filters- but uncompressed to try deinterlacing and also other deinterlacing methods applied to encoded video.
If I get the opportunity this weekend, I still intend on trying a reformat and specifically testing for the interlacing problem. I think I have a spare drive kicking around so I dont have to bother erasing everytthng Ive since installed on this one
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Senior Member
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21. January 2010 @ 18:57 |
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Good luck with the reformat - Windows 7 ?
Let me know how it goes. I know you're suspicious the problem
started after the codec pack was installed. However,
if you're capturing in RGB uncompressed, codecs not really involved
yet - something to do with the capture drivers?
I'm using a triple boot, Ubuntu, Vista and XP.
I use Vista so seldom; I've got the media center working with my
TV card - I really don't do much else with it. I find it a little
clunky. My box uses the Vista boot loader to access all the OS's.
I suppose I could upgrade to 7 - something to consider.
Re: the back and forth thread - You're welcome.
This message has been edited since posting. Last time this message was edited on 22. January 2010 @ 01:13
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AGwolf
Junior Member
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16. February 2010 @ 14:37 |
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I don't really know what the quirks are, but in trying to "fix" the problem, I've learned a fair bit about post-processing, and editing BEFORE compression, as well as working with Virtual Dub as a tool... so ultimately thanks in a general sense, even if this sill video card is still recording poorly lol :P
Maybe I'll see if I can find a capture card that does 60fps...
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Senior Member
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18. February 2010 @ 14:07 |
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You're welcome. Virtualdub is being improved all the time.
For example, the Bob Doubler filter may give better results for your
issue.
Good Luck !
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