Quantcast KDVD: Need Someone to Look at my Clips - digitalFAQ.com Forums [Archives]
  #1  
06-13-2004, 11:03 AM
davidmtml davidmtml is offline
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DialHot...I saw that in some other people's topics you asked them to put a short clip of their original and reencoded video so you could analyze them...I was wondering if you would be kind enough to do the same for me.

But first, I have two questions

1. Where can I host these files where you can get them?

2. How do I get just a short segment of my encoded video? I can't do it the same way as with the avi in VirtualDub because it is not an avi?
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  #2  
06-13-2004, 11:20 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by davidmtml
1. Where can I host these files where you can get them?
For a short time usage like this you can use the service "you send it" :
http://www.yousendit.com/

Just upload your file there and post the link you will receive by mail.

Quote:
2. How do I get just a short segment of my encoded video? I can't do it the same way as with the avi in VirtualDub because it is not an avi?
With tmpgenc, menu file, mpet tool, cut/merge.
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  #3  
06-13-2004, 02:05 PM
davidmtml davidmtml is offline
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http://www.yousendit.com/d.aspx?id=9...7DDBC58A1F4F84

http://www.yousendit.com/d.aspx?id=5...91FDAD74B35594
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  #4  
06-13-2004, 05:57 PM
trigger911 trigger911 is offline
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looks decent i would have raised cq and bitrate makin it full screen or left it 16:9 so it wouldnt get all choppy but thanx for showing ur work /mes always wonder what otherz peeps video looked like.
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  #5  
06-13-2004, 06:36 PM
Dialhot Dialhot is offline
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All I can say is that your source is really awfull. I do'nt understand how you can want to put that on a DVD. You should do a KVCD with this : the lower resolution will give much better results.

The KDVD you did is correct but to remove all problems that were in the source you surely use heavy filters. That results in a very blurry picture. Nice, but blur.

Perhaps some problems in the max bitrate also. Can you tell us more about what you did ?
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  #6  
06-13-2004, 08:18 PM
davidmtml davidmtml is offline
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Once again, thanks for your help guys

I encoded this using TMPGEnc XPress...

I just looked at the official specifications on the KVCD mainpage and put those settings into it. I used CQ 70, Min 200, Max 3000 bitrate. I know that my source is not that good, but I would still like to have it on a DVD just for the fact that I can have many movies on one DVD. Would I be better off going for the Half D1, with 352x480? The reason that I did 720x480 was because my source is 608x256, and I didn't want to lose even more quality...was this correct thinking? Or would I still be better at half D1?

Question: What should I put for the aspect ratio of my source?...There are a lot of options: Pixel 1:1, Pixel 10:11 (NTSC 4:3), Pixel 40:33 (NTSC 16:9), Image 4:3, Image 16:9, or Image 2.21:1...I am confused...I believe when I encoded I used Pixel 40:33 (NTSC 16:9).

Anyway, more on my encoding process...I used 23.976, 29.97 internally with 3:2 pulldown. I used standard motion search precision...cut my encoding time more than half from High, and I couldn't tell a difference. I had "detect scene change" checked. I read in another topic that unchecking this removed the jerkiness of the video, but I tried that and it didn't work.

My GOP is 1-5823-2-24...Should I be using closed GOP?

Well, I think that's about it...once again guys, thanks for your time.
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  #7  
06-13-2004, 08:39 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by davidmtml
I used CQ 70, Min 200, Max 3000 bitrate.
There it is. 3000 is too low with this resolution. Use 4500.

Quote:
Would I be better off going for the Half D1, with 352x480? The reason that I did 720x480 was because my source is 608x256, and I didn't want to lose even more quality...
It's true that if you use a lower res, the result will look more blur that it is yet . BTW you can use 704*480 and gain some precious bits.

Quote:
Question: What should I put for the aspect ratio of my source?...There are a lot of options: Pixel 1:1, Pixel 10:11 (NTSC 4:3), Pixel 40:33 (NTSC 16:9), Image 4:3, Image 16:9, or Image 2.21:1...I am confused...I believe when I encoded I used Pixel 40:33 (NTSC 16:9).
Things were to simple that they add new choices ?
Avi are always Pixel 1:1 (except for DV avi that can be anamorphic).

Quote:
I read in another topic that unchecking this removed the jerkiness of the video, but I tried that and it didn't work.
Detect scene change is usefull IMHO for putting chapters aftewards during DVD authoring. Else it doesn't have any incidence.

Quote:
My GOP is 1-5823-2-24...Should I be using closed GOP?
No need to do that.
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  #8  
06-13-2004, 09:32 PM
davidmtml davidmtml is offline
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Thanks for the quick response DialHot

You think that the jerkiness would be caused by too low of a bitrate? My source is only like 900...I know that since that is in DivX it really doesn't have relevance to the bitrate used in mpg, but...Wow.

EDIT: Changing Max Bitrate to 4500 did not help
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  #9  
06-14-2004, 03:41 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by davidmtml
EDIT: Changing Max Bitrate to 4500 did not help
For sure : there is no jerkiness in your video ! Don't you have a problem when you read mpeg on your PC ? Or did I miss it ?
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  #10  
06-14-2004, 05:02 AM
glent2k3 glent2k3 is offline
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I see the jerky movement too ,mayeb this a codec problem
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  #11  
06-14-2004, 05:27 AM
Dialhot Dialhot is offline
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I perhaps looked at to quicly. I'll check tonight.
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  #12  
06-14-2004, 08:04 PM
davidmtml davidmtml is offline
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Well...I figured out what the problem was...seems that VirtualDub was reporting my source as 23.976 fps when it was really 29.97. That was where my jerkiness came from.

Do you guys know of any other tool that will tell me the framerate of my source so I don't have this problem again?
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  #13  
06-14-2004, 08:14 PM
Dialhot Dialhot is offline
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Gspot !
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  #14  
06-15-2004, 07:56 PM
davidmtml davidmtml is offline
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Hmm...GSpot sees it as 23.97 frames per second also...maybe that's not where the jerkiness comes from. Although that seems like a valid reason of why it was very jerky...Any ideas?
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  #15  
06-15-2004, 08:08 PM
Dialhot Dialhot is offline
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I checked again and there is no jerk on this video...
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  #16  
06-15-2004, 08:38 PM
muhali3 muhali3 is offline
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Davidmtml: What script did you use on your source?
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  #17  
06-15-2004, 09:35 PM
davidmtml davidmtml is offline
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Quote:
Originally Posted by muhali3
Davidmtml: What script did you use on your source?
I didn't use a script.

DialHot...I still see the jerkiness.

Didn't you say you saw the jerk the first time, but not the second time?

Because I never changed the file. I don't know, but there is definately a choppiness to my 23.976 with 3:2 pulldown encoded video, but there is not with my 29.97 file...I'll upload that one too so you guys can compare.

Link: http://www.yousendit.com/d.aspx?id=F...4BE0518C73CBEB
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  #18  
06-16-2004, 03:55 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by davidmtml
Didn't you say you saw the jerk the first time, but not the second time?
No, read agin my posts : I never saw any jerkiness in your video.


Quote:
but there is definately a choppiness to my 23.976 with 3:2 pulldown encoded video
So it is a player problem !
Don't forget that this pulldown is applied DURING PLAYBACK.
Which player do you use ? Does it use the hardware acceleration of the card ? Which codec is used on your PC ?

Do your test on a TV, that will be the safest way.
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  #19  
06-16-2004, 05:15 PM
davidmtml davidmtml is offline
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I have tried Core Media Player, WMP9, Nero Showtime, PowerDVD, all have jerkiness. It is also jerky when I play it on my SA-Player and my TV. The source is xVid, and I have the xVid codec installed. In GSpot it tells me the codec that it uses, and I have it. If it was a codec problem, wouldn't it be jerky on both 29.97 and 23.976?

Thanks again for you time and help...
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  #20  
06-16-2004, 05:30 PM
Dialhot Dialhot is offline
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You don't understand : the problem is in the MPEG2 codec used during the playback of the MPEG. This is the moment when the 3:2 pulldown is performed.

But generally on the standalone the problem is fixed (as standlone perfom the pulldon with an hardware chipset).

WHat I do not understand at all is that I DLed the 2nd file and I have jerkiness during the universal logo, and not after.

I really don't know what you are using but you are definitely doing something wrong

You said you are not using any script ?

EDIT: the same problem on the universal logo is present in the xvid source

Can you explian me EXACTLY what you are calling jerkinees and in WHICH precise moment of the video you see it ?
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