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Old 17th January 2008, 17:50   #561  |  Link
squid_80
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You can figure out the binary format of a VOL and do a search/replace with your favourite hex editor.
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Old 17th January 2008, 19:18   #562  |  Link
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@Honeyko: The predefined PARs are stored as 4 bits in the VOL, custom PARs use an additional 16 bits (8 width, 8 height). So in certain cases it is possible to modify the file in-place, but not always. Of course it's not necessary for it to be written in .NET, but C# is the language I'm most comfortable with. MPEG4 Modifier is something I did mostly for fun, I didn't really even need it, and for me writing it in C++ would have been more frustrating than anything and I wouldn't have written it at all.

@squid_80:
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Old 17th January 2008, 23:28   #563  |  Link
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Quote:
Originally Posted by squid_80 View Post
You can figure out the binary format of a VOL and do a search/replace with your favourite hex editor.
On the off chance you've already done this, could you help save me some time and tell me what to look for in what part of the file?

(Have hex-editor, and ready to hack....)
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Old 18th January 2008, 01:11   #564  |  Link
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why is it that when i change the aspect Ratio to 16:9 in the display AR side that it does display the video 16:9 but when i burn the video onto a DVD and play back on my Divx dvd player it display the Aspect ratio before and not the 16:9 that i change to?

Thank you
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Old 18th January 2008, 04:13   #565  |  Link
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@Ruud00: Your DVD player must be ignoring the aspect ratio information stored in the video header. Unless there is a firmware update to support this, you will have to reencode the video to correct aspect ratio.

@Honeyko: It's a pain to do in a hex editor. For example let's say you want to set a custom PAR and insert 2 8-bit values for the width/height. The VOL is a stream of bits and these width/height fields will never fall on byte-boundaries, so it's not as simple as just inserting a few bytes.
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Old 18th January 2008, 06:12   #566  |  Link
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Quote:
Originally Posted by Honeyko View Post
On the off chance you've already done this, could you help save me some time and tell me what to look for in what part of the file?

(Have hex-editor, and ready to hack....)
OK. I'll only describe how to do it for a file using one of the pre-defined PARs, Moitah's already explained why it's a lot tougher if you want to go from predefined->custom or back again so I won't do that (we'd be here all day, the program is a lot quicker).

To start with, search for the first occurrence of (hex) 00000120. That's the VOL start code. Directly after that there's a byte that you don't need to change, just remember its value (in my case it's 0x08). Bits 5-2 in the next byte describe the PAR. The file I'm looking at right now has 0x96 at this byte. In binary this is 10010110, bits 5-2 = 0101 = 5. This stands for 16:9 NTSC, or a PAR of 40:33. Here's the full table:
(1)0001 = 1:1
(2)0010 = 12:11 (4:3 pal)
(3)0011 = 10:11 (4:3 ntsc)
(4)0100 = 16:11 (16:9 pal)
(5)0101 = 40:33 (16:9 ntsc)
(15)1111 = custom
So if I wanted to change the PAR to 12:11, I need to change those four bits to 0010. Which makes the new whole byte 10001010 = 0x8A.
From here you use the hex editor to do a search/replace on all the VOL headers. In this case I'd search for (in hex):
00 00 01 20 08 96 87 FF FB (take the next few bytes as well for good measure)
and replace with
00 00 01 20 08 8A 87 FF FB
If your hex editor reports how many occurrences were replaced it should be equal to the number of I-frames in the file since there's a VOL header stored at each one.
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Old 25th April 2008, 19:44   #567  |  Link
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AVI "User Data" modifier for KiSS DVD players

Taking inspiration from the Linux ipsr and the MPEG4 Mod programs, a friend has written the attached KiSSconv utility.

The utility will check if the file needs the change in the User Data from DivX503b1393p to DivX999b000p and make the changes on the fly, directly in the avi file.

Run it either from the command line, with the filename (full filename, for example Blahblah.avi) as the parameter (if you want to see how many times it changed the string in the file, which is the output of the utility) or just drop the avi file onto the executable (which will open a cmd window but that will close once it has finished processing the file).

Attached zip file has both source and exe.

WARNING

Use with care as the utility modifies the file in-place, thus as your original file will be directly modified there will be NO backup copy of it. Therefore please make a backup of the avi file before running the utility if needed/unsure/etc. I have been using the utility and it has never corrupted a file, but just in case...
Attached Files
File Type: zip KiSSconv.zip (8.4 KB, 248 views)

Last edited by SwissDude; 28th April 2008 at 18:43.
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Old 26th April 2008, 05:53   #568  |  Link
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FIle seems to be clean, approved attachment: http://www.virustotal.com/de/analisi...af566e4963eecf
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Old 10th August 2008, 02:46   #569  |  Link
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Moitah: I've added CQM identification to v1.4.4. Will you be interested in adding it to the next official version, or should I release it as a "branch" of some sort?
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Old 10th August 2008, 05:55   #570  |  Link
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@shae: Yeah, I'd like to take a look at it, can you upload the code somewhere?
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Old 4th April 2009, 20:05   #571  |  Link
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can someone assist me to change the aspect ratio of avi file. i am new to this software & cant find a guide
the problem is when i play this on windows media player, the movie is all stretched up & when i open it with virtualdub & then change the aspect ratio to 16:9 (wide screen), the video looks just perfect. (actually from where i downloded this, there was a note stating "set aspect ratio manually to 16:9")

any help will be much appreciated
& i have a few more files with exactly the same problem but they all have different frame sizes, like one is 512*384 & so on.

These are the screen caps:



this is the info from mediainfo:
Code:
General
Complete name                    : E:\abcd.avi
Format                           : AVI
Format/Info                      : Audio Video Interleave
File size                        : 699 MiB
Duration                         : 1h 38mn
Overall bit rate                 : 988 Kbps
Writing application              : VirtualDubMod 1.5.4.1 (build 2178/release)
Writing library                  : VirtualDubMod build 2178/release

Video
Format                           : MPEG-4 Visual
Format profile                   : Streaming Video@L1
Format settings, BVOP            : Yes
Format settings, QPel            : No
Format settings, GMC             : No warppoints
Format settings, Matrix          : Custom
Codec ID                         : XVID
Codec ID/Hint                    : XviD
Duration                         : 1h 38mn
Bit rate                         : 842 Kbps
Width                            : 624 pixels
Height                           : 464 pixels
Display aspect ratio             : 4/3
Frame rate                       : 29.970 fps
Resolution                       : 24 bits
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.097
Stream size                      : 596 MiB (85%)
Writing library                  : XviD 1.0.2 (UTC 2004-08-29)

Audio
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 3
Codec ID                         : 55
Codec ID/Hint                    : MP3
Duration                         : 1h 38mn
Bit rate mode                    : Variable
Bit rate                         : 131 Kbps
Nominal bit rate                 : 128 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Resolution                       : 16 bits
Stream size                      : 93.0 MiB (13%)
Alignment                        : Aligned on interleaves
Interleave, duration             : 24 ms (0.72 video frame)
Interleave, preload duration     : 273 ms
Writing library                  : LAME3.90.
Encoding settings                : ABR
Language                         : English

Last edited by mahendra; 4th April 2009 at 20:54.
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Old 4th April 2009, 20:24   #572  |  Link
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Quote:
Originally Posted by mahendra View Post
.... (actually from where i downloded this, there was a note stating "set aspect ratio manually to 16:9")..... Midsomer Murders S03-E02 Blue Herrings.avi
Please refer to forum rule 6...

Nobody here can help you with copyrighted files you have downloaded!
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Old 16th May 2009, 01:23   #573  |  Link
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any updates to this great program since Jan 2007? Love to see batch file support in the GUI (I know you can through command line already). Thanks!
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Old 26th June 2009, 22:36   #574  |  Link
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Sorry, edited.

Last edited by Ryo94; 27th June 2009 at 00:05.
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Old 26th June 2009, 23:34   #575  |  Link
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Ryo94,

The file mahendra wanted help with was illegally downloaded, so your reply post is in violation of rule 6.

You better remove it before a moderator strikes you!
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Old 1st July 2013, 22:55   #576  |  Link
gonwk
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Hi folks,

First of all Moitah Thanks for your Tool is a Life Saver ... I have a question, may be someone can help ...

When I use MPEG4Modifier to correct the Playback Aspect Ratio of an AVI ... I happen to check the output AVI with MediaInfo and I noticed that under "Container and General Info" the Writing Application Info now are gone.

Q: Is there a Way that I can Keep that info even after I use MPEG4Modifier tool?

Thanks,

G!
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