2009-07-06, 00:23 | Link #381 | |
Junior Member
Join Date: Feb 2009
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And, what if I need to crop 4 pixels in Y, but not in -Y? 476 is not mod16, the next mod16 number would be 464 I think, and that's too much crop. I have one of those. Again, thanks for the help and sorry for so much questions. |
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2009-07-06, 02:20 | Link #382 |
Saizen
Fansubber
Join Date: Jun 2004
Age: 39
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8640/4739 and 6480/4739 are DAR numbers. IIRC the SAR for 4:3 NTSC is 10/11 (704*(10/11)=640) and 40/33 for 16:9. And yes, those stay the same as long as you don't resize.
If you can't crop to mod16 you either overcrop (good) or resize (bad; watch the AR error %). If you feel adventurous I suppose you could crop to a non-mod16 resolution; x264 can handle it just fine but playback results may be unpredictable. |
2009-07-06, 11:24 | Link #384 |
Fansubber
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This may sound like a retarded question, but bear with me. I'm still inexperienced
I'm in the process of ripping a DVD with meGUI, which is in 720x480 resolution. I want to merge this with AviSynth to a video that's in 640x480 resolution. Question - do I need to resize the video to match the DVD [e.g. Lanczos4Resize(720,480) ] or can I just merge as is? Suppose I don't merge, but use ordered chapters in Matroska instead - will that change the answer? I ask with the understanding that meGUI automatically passes on an aspect ratio to x264, telling it to dynamically use 4:3 (or 640x480 resolution) for the NTSC DVD. Thanks in advance |
2009-07-06, 12:43 | Link #385 |
Aegisub dev
Join Date: Sep 2004
Location: Stockholm, Sweden
Age: 39
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Zergrinch, read the discussion that has JUST been had in this very thread, it's an AR issue you're having.
@TGBatman: Nobody cares about the outer 16 pixels on either edge of the picture, the animation is generally made to take overscan into account and thus there won't be any interesting picture that near to the edges, you can safely just crop 8 pixels at every edge and not resize at all. (Or only crop at left/right edges if the picture touches the top and bottom perfectly all the way through; but it's ugly if some sections have small black pixel lines near the top or bottom, IMO.)
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2009-07-06, 20:04 | Link #386 |
Fansubber
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I did read it, and my decision was to rip the DVD as is and let the --sar option take care of aspect ratios.
But I'm looking for something slightly different. I want to get a 720x480 set to 4:3 AR to play with a 640x480 set to 1:1. Can I do that or do I have to resize said 640x480 first? |
2009-07-07, 21:57 | Link #388 |
Senior Member
Author
Join Date: Jul 2007
Location: Virginia Tech
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Recently, about 1/8 h.264 encode come out for me with fine video and audio to start with. But at a select point in the encode, the video will change to the following screen:
http://i27.tinypic.com/2ignojm.jpg And it will remain that way for the rest of the encode. My avisynth script is usually: AVISource("C:\Lossless.avi") Textsub("C:\subs.ass") And when I run the encode a second time without changing anything, it encodes perfectly. Does anyone know what's going wrong so I don't have to waste 3-6 hours?
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2009-07-13, 11:54 | Link #390 | |
Wanderers
Fansubber
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Quote:
Original: Spoiler for Screenshot:
With Tweak() and Levels() in Preview: Spoiler for Screenshot:
Original's quality is not so good. You can still see banding and it became worse if I add in Tweak and Levels. I'm looking for a filter to remove or lessen the banding. Thanks. |
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2009-07-14, 02:14 | Link #393 |
Excessively jovial fellow
Join Date: Dec 2005
Location: ISDB-T
Age: 37
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it works exactly the same when encoding as it does when postprocessing, the problem is to get the encoder to keep the nice smooth gradients and not re-introduce the banding; usually this is only a problem in dark scenes
one solution is to add a very small amount of grain (think addgrainc(1.0) or even less) and encode with a small amount of psy-rd.
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2009-07-14, 02:16 | Link #394 | |
Excessively jovial fellow
Join Date: Dec 2005
Location: ISDB-T
Age: 37
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Quote:
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2009-07-14, 09:45 | Link #395 |
~Buri Buri!~
Fansubber
Join Date: Aug 2008
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I am having again the same blended frames problem as I previously explained here, the only difference now is that this is from the actual interlaced source (DVD). I tried a few deinterlacers such as Yadif, TDeint, TempGaussMC, LeakKernelDeint, all with correct settings, and all seem to produce those blending artefacts. Is there any solution for this problem? If needed I can give some samples of the source.
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2009-07-14, 10:49 | Link #398 |
Lonely Traveler
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This might be a rather broad question. I'm trying to collect myself a number of quality plugins for AviSynth and I'm wondering what some people here would consider essentials.
Ha, I phrased my question as a statement. Anyways, suggestions are welcome of course. I'm not really in a rush, though, because I'm lacking some anime sources to work with at the moment. |
2009-07-14, 11:17 | Link #399 | |
Aegisub dev
Join Date: Sep 2004
Location: Stockholm, Sweden
Age: 39
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Quote:
Code:
mpeg2source("myfile.d2v") separatefields() If you see blending in that, your source is impossible to fix, except with ten thousand hours in mspaint.
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2009-07-14, 11:37 | Link #400 | |
~Buri Buri!~
Fansubber
Join Date: Aug 2008
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Tried without any filters as you suggested above, and unfortunately the blended artefacts are still there. But then again it is fortunate that the DVD doesn't have this problem all the time ^_^
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