Pixelation Problem...

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Pixelation Problem...

Postby CCChang » Thu Dec 07, 2006 4:03 pm

Whenever I save an AMV that has been made in Adobe Premiere Pro, I always have a pixelation problem when I compress it with DivX.

Here's the settings I've been using, plus some ones I could use:

File Type: Microsoft AVI

Compressor: DivX 6.4.0 Codec (1 Logical CPU)

Frame Rate: 29.97 (the video clips are 23 frames if that has anything to do with it (can change the frame rate setting if needed))

Pixel Aspect Ratio: Either Square Pixels (1.0), D1/DV NTSC (0.9), D1/DV NTSC Widescreen 16:9 (1.2), D1/DV PAL (1.067), etc...

I can also configure the DivX Codec if that helps.

Thanks in advance.
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Postby CCChang » Thu Dec 07, 2006 4:05 pm

Sorry, forgot to say what the problem was...

Well, say if an anime character was moving, behind him or maybe around him is the odd clutter of pixels. Some of the pixels are pixels from the previous frame.

How do I get rid of that? What am I doing wrong?
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Postby Kariudo » Thu Dec 07, 2006 4:18 pm

are you trying to export out of premiere and letting premiere encode your video at the same time?

if so, then that's part of your problem. Premiere pro's exporting sucks, you can usually only get good results if you export uncompressed.

the other part of your problem is divx. As far as I know, xvid is still better.
this will help you compress using xvid
(if anyone has evidence to the contrary, please tell me)

hope that helps
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Re: Pixelation Problem...

Postby Keeper of Hellfire » Fri Dec 08, 2006 4:00 am

This:
THE SEED wrote:Frame Rate: 29.97 (the video clips are 23 frames if that has anything to do with it (can change the frame rate setting if needed))
is responsible for this
THE SEED wrote:Some of the pixels are pixels from the previous frame.
Don't change the framerate, unless you make a proper telecine for DVD encoding. Btw, 23 fps sounds weird. If you mean it has 23.976 fps, change it to 24 fps for editing, because Premiere can't handle this framerate correctly.
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Postby usa mimi productions » Wed Dec 20, 2006 11:59 pm

i don't meant to hijack the thread but starting a new thread seems kind of a waste.

i am having problems with artifacts when i am exporting my raws from divx to dv. the artifacting doesnt show up until i import it into final cut pro. if it is just the format i am exporting to dv, i can just redo the conversion?
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Postby Minion » Thu Dec 21, 2006 12:20 am

this is called interlacing. im too tired to give a proper explanation or post a avi script, so just run a deinterlace filter in vdub
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Postby CrackTheSky » Thu Dec 21, 2006 3:37 am

Minion wrote:this is called interlacing. im too tired to give a proper explanation or post a avi script, so just run a deinterlace filter in vdub


Although I'm not sure who Minion's talking to here, examples of what this looks like can be found here and instructions on how to remove it can be found here.
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Re: Pixelation Problem...

Postby Qyot27 » Thu Dec 21, 2006 8:00 am

THE SEED wrote:Whenever I save an AMV that has been made in Adobe Premiere Pro, I always have a pixelation problem when I compress it with DivX.

Here's the settings I've been using, plus some ones I could use:

File Type: Microsoft AVI

Compressor: DivX 6.4.0 Codec (1 Logical CPU)

Frame Rate: 29.97 (the video clips are 23 frames if that has anything to do with it (can change the frame rate setting if needed))

Pixel Aspect Ratio: Either Square Pixels (1.0), D1/DV NTSC (0.9), D1/DV NTSC Widescreen 16:9 (1.2), D1/DV PAL (1.067), etc...

I can also configure the DivX Codec if that helps.

Thanks in advance.


THE SEED wrote:Sorry, forgot to say what the problem was...

Well, say if an anime character was moving, behind him or maybe around him is the odd clutter of pixels. Some of the pixels are pixels from the previous frame.

How do I get rid of that? What am I doing wrong?

If what you are referring to is macroblocking (i.e. a bunch of squares that show up and make the video generally look ugly) it's because of insufficient bitrate. It's usually most noticeable in high-motion areas because of the way lossy compressors (like DivX) deal with bitrate allotment. You have to raise the bitrate for them to go away - consequently this will also raise the filesize.

As was mentioned before, XviD is generally a better choice since it can be customized more, and it's more optimized than DivX is.
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Postby usa mimi productions » Thu Dec 21, 2006 12:57 pm

file size really isn't an issue to me as is, so i am gonna try the higher bit rate and also another codec to maybe correct the problem. it was macro blocking not interlacing though. thank you, qyot :)
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Postby Minion » Fri Dec 22, 2006 12:03 am

mine was directed towards seed
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Postby CCChang » Thu Dec 28, 2006 7:53 pm

Minion wrote:this is called interlacing. im too tired to give a proper explanation or post a avi script, so just run a deinterlace filter in vdub


...huh?

Are you saying I should redo all my clips in VDub?!?!?!?

EVERY DAM ONE?!!?!?!?

If thats what you're saying, then I'll do that for the future, but not now...


Anyway, the bitrate did improve it quite a bit. The only thing stopping me now are three things:

1. Which Pixel Aspect should I use (as in Square Pixels (1.0), D1/DV NTSC (0.9), etc...)?

2. Everytime I attempt to export with XVid, this Xvid Status window comes up and crashed the whole program.

3. (If Problem 2 can't be solved (I would like to know if it is solved anyway)) When I export with DivX with a higher bitrate with multipass, it keeps on coming up with this serious error (it's being unhelpful by not saying what it is unfortunately...) and is forced to shut down the program, not exporting completely. What can I do to avoid this problem and finish the AMV exporting?


Also, when I'm creating another AMV, will I have to Deinterlace clips with VDub before I use the clips? Or can I just use it as it is? (Sorry if its probably a stupid question, but hey, I'm still clueless...)

And yeah, if anyone has a simular problem, go ahead and just use this thread if you want.
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Postby Qyot27 » Thu Dec 28, 2006 11:19 pm

THE SEED wrote:1. Which Pixel Aspect should I use (as in Square Pixels (1.0), D1/DV NTSC (0.9), etc...)?

Depends. What is the resolution of the footage you're editing with/exporting at? If it's 720x480, then use 0.9 (and then resize to 640x480 or other 4:3 ratio afterward*). If it's 640x480 or 848x480, use Square - if you want to resize it after that, just make sure to preserve the ratio (4:3 or 16:9, respectively).

*If it's anamorphic footage (comes from a DVD that says 'Enhanced for 16:9 televisions', or some such) then don't use a 4:3 ratio; use a 16:9 ratio.

2. Everytime I attempt to export with XVid, this Xvid Status window comes up and crashed the whole program.

Export XviD from Premiere? Don't. Use VirtualDubMod for that. And the status window can be disabled in XviD's configuration by going to Other Options... and unchecking 'Display encoding status'.

Also, when I'm creating another AMV, will I have to Deinterlace clips with VDub before I use the clips? Or can I just use it as it is? (Sorry if its probably a stupid question, but hey, I'm still clueless...)

The guides cover this, but generally yes (although not with VDub; this is where using AviSynth is highly recommended since it streamlines it for you and other image improvements can be done at the same time which can make everything easier to compress to XviD at the end). Stuff like deinterlacing or inverse telecine should be done prior to ever editing with the footage to simplify things. Premiere and most other editing systems worth their salt can edit Interlaced footage properly, but it's a generally agreed-upon pain-in-the-ass to do so - it's far easier to work with Progressive footage.
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Postby CCChang » Fri Dec 29, 2006 9:35 am

Qyot27 wrote:
THE SEED wrote:1. Which Pixel Aspect should I use (as in Square Pixels (1.0), D1/DV NTSC (0.9), etc...)?

Depends. What is the resolution of the footage you're editing with/exporting at? If it's 720x480, then use 0.9 (and then resize to 640x480 or other 4:3 ratio afterward*). If it's 640x480 or 848x480, use Square - if you want to resize it after that, just make sure to preserve the ratio (4:3 or 16:9, respectively).

*If it's anamorphic footage (comes from a DVD that says 'Enhanced for 16:9 televisions', or some such) then don't use a 4:3 ratio; use a 16:9 ratio.


What if it's both? Like some scenes I'm using are both 640x480 and 720x480. What do I do then? Should I higher the bitrate? Or something like that?

2. Everytime I attempt to export with XVid, this Xvid Status window comes up and crashed the whole program.

Export XviD from Premiere? Don't. Use VirtualDubMod for that. And the status window can be disabled in XviD's configuration by going to Other Options... and unchecking 'Display encoding status'.


Could you explain this again? Like sure, I can disable it like you say, but do you mean use the VDub to resave the whole AMV? Or use it as a compressor on the exporting options of Premiere?

Also, when I'm creating another AMV, will I have to Deinterlace clips with VDub before I use the clips? Or can I just use it as it is? (Sorry if its probably a stupid question, but hey, I'm still clueless...)

The guides cover this, but generally yes (although not with VDub; this is where using AviSynth is highly recommended since it streamlines it for you and other image improvements can be done at the same time which can make everything easier to compress to XviD at the end). Stuff like deinterlacing or inverse telecine should be done prior to ever editing with the footage to simplify things. Premiere and most other editing systems worth their salt can edit Interlaced footage properly, but it's a generally agreed-upon pain-in-the-ass to do so - it's far easier to work with Progressive footage.


OK...

So just to check...

It's a YES, right?


And also, for my current problem (because it will take me a LONG time to VDub all my clips), how should I export it in it's current state?

And if this helps:

Frame Rate of Clips: 23
Resolution: some are 640x480, some are 720x480

None have been deinterlaced.
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Postby BasharOfTheAges » Fri Dec 29, 2006 3:26 pm

You need to deinterlace first. then if you're going to blend clips either do it in an artsy way or crop and resize so that everything is at the proper PAR and size. Then you edit.

Preprocessing is one of the most tedious steps of editing if everything isn't perfect to start with.
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Postby CCChang » Sat Dec 30, 2006 12:16 pm

I just want check first so that I don't get it wrong months later...

How do you deinterlace on VDub, and also, how do you like set the settings for the clip in VDub like make something that's 640x480 to 720x480, 24 frames to 30 frames, etc?
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