Jerky Playback with 1080i Long Movies

[Mephiston]

Hi everyone, i'm having trouble shrinking some HD stuff.

It only happens with stuff longer than 40Mins, and all have been 1080i.
When it's finished the playback is very jerky, like it pauses every second and then jumps ahead.

I have noticed that on everyone that is messed up AutoGK reports a warning after the first pass, something like this.

Warning : A different number of frames was found

Options i am checking are :

Force Deinterlace of hybrid stuff
Force sharp matrix
Autotune cropping, +8 at the bottom

Small stuff is unaffected, like TV shows. These encode no problem.

Any help would be great as i have a few things i really don't want to keep as TS files.

Thanks

[CWR03]

It indicates a problem with framerate - I believe there is a setting to change 60fps to 23.976.

[Mephiston]

It indicates a problem with framerate - I believe there is a setting to change 60fps to 23.976.

Ok thanks. I've been checking the change framerate to 29.97 since thats what all the original stuff was.

I'll just try letting AutoGK choose.

[manono]

Hi-

I've been checking the change framerate to 29.97 since thats what all the original stuff was.

It may have been broadcast at 29.97fps, but if it was a movie, it was originally 23.976fps. I don't think I would force the deinterlacer either.

Even if you had set the wrong framerate, I'm not convinced getting it correct is going to solve your problem. You said it pauses every second and jumps ahead. It sounds like a lack of CPU power to me as well. Are you keeping these things at a high resolution? If so, that may cause a playback problem. But I could be wrong, and getting the framerate correct will fix it.

[BodoWitcha]

Hi everyone, i'm having trouble shrinking some HD stuff.

It only happens with stuff longer than 40Mins, and all have been 1080i.
When it's finished the playback is very jerky, like it pauses every second and then jumps ahead.

I have noticed that on everyone that is messed up AutoGK reports a warning after the first pass, something like this.

Warning : A different number of frames was found
Thanks
I have to report the same problem. I have not yet discovered the "with longer then 40 mins" only, but it happens only when the source material was detected as FILM.

I have tried many of the "hidden" options but sofar no effect.

I observed that the sound is playing normally but the movie is jerky as described. The synchronization picture/sound is completely lost. It looks as if the movie runs 29,970/23.976 faster and freeze momentarily to find a sync point and then continues at the faster rate.

For diagnostic purposes I think the log could be important, therefore I have included it at the end.

[24-9-2005 16:48:44] AutoGK 2.18b
[24-9-2005 16:48:44] OS: WinXP (5.1.2600).2
[24-9-2005 16:48:44] Job started.
[24-9-2005 16:48:44] Input file: E:\Kill Bill Volume 2 HD.ts
[24-9-2005 16:48:44] Output file: D:\Kill Bill Volume 2 HD.avi
[24-9-2005 16:48:44] Output codec: XviD
[24-9-2005 16:48:44] Audio 1: PID 0014, Private AC3 Audio Stream
[24-9-2005 16:48:44] Subtitles: none
[24-9-2005 16:48:44] Format: .AVI
[24-9-2005 16:48:44] Target size: 4450Mb
[24-9-2005 16:48:44] Custom resolution settings: fixed width of 1920 pixels
[24-9-2005 16:48:44] Custom audio settings: Original
[24-9-2005 16:48:44] Started encoding.
[24-9-2005 16:48:44] Demuxing and indexing.
[24-9-2005 16:55:54] Processing file: E:\Kill Bill Volume 2 HD.ts
[24-9-2005 16:55:54] Source resolution: 1280x720
[24-9-2005 16:55:54] Found NTSC source.
[24-9-2005 16:55:54] Source aspect ratio: 16:9
[24-9-2005 16:55:55] Analyzing 60fps HDTV source.
[24-9-2005 17:06:47] Percentage of 3:2 dupe patterns: 91,36
[24-9-2005 17:06:47] Found 24fps FILM source.
[24-9-2005 17:06:48] Output will contain 157977 frames
[24-9-2005 17:06:48] Audio1 size: 395,333,450 bytes (377.02 Mb)
[24-9-2005 17:06:48] Overhead: 1,098,112 bytes (1.05 Mb)
[24-9-2005 17:06:48] Video size: 4,269,731,638 bytes (4071.93 Mb)
[24-9-2005 17:06:48] Running compressibility test.
[24-9-2005 17:06:48] Writing the following script to D:\agk_tmp\Kill Bill Volume 2 HD_comptest.avs
===========================================================
LoadPlugin("C:\PROGRA~1\AutoGK\DGMPGDec\DGDecode.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\autocrop.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\decomb.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\RemoveGrainSSE2.dll")

movie = mpeg2source("D:\agk_tmp\Kill Bill Volume 2 HD.d2v")
movie = SelectEven(movie).Decimate(5)
cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=0,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
fixed_aspect = 1
c_width = width(cropclip)
c_height = round(height(cropclip) / fixed_aspect)
input_par = float(c_width)/float(c_height)
out_width = 1920
out_height = round(float(out_width) / input_par)
hmod = out_height - (floor(out_height / 16 ) * 16)
out_height = (hmod > 4) ? (out_height + (16 - hmod)) : (out_height - hmod)
new_aspect = (float(out_width) / float(out_height)) / fixed_aspect
autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=new_aspect,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
LanczosResize(out_width,out_height)
RemoveGrain(mode=2)
SelectRangeEvery(300,15)
===========================================================
[24-9-2005 17:51:45] Duration was: 44 minutes 55 seconds
[24-9-2005 17:51:46] Speed was: 2,93 fps.
[24-9-2005 17:51:47] Compressibility percentage is: 45,63
[24-9-2005 17:51:47] Using softer resizer.
[24-9-2005 17:51:47] Chosen resolution is: 1920x800 ( AR: 2,40 )
[24-9-2005 17:51:47] Predicted comptest value is: 47,33
[24-9-2005 17:51:47] Running first pass.
[24-9-2005 17:51:47] Writing the following script to D:\agk_tmp\Kill Bill Volume 2 HD_movie.avs
===========================================================
LoadPlugin("C:\PROGRA~1\AutoGK\DGMPGDec\DGDecode.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\autocrop.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\decomb.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\RemoveGrainSSE2.dll")

movie = mpeg2source("D:\agk_tmp\Kill Bill Volume 2 HD.d2v")
movie = SelectEven(movie).Decimate(5)
cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=0,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
fixed_aspect = 1
c_width = width(cropclip)
c_height = round(height(cropclip) / fixed_aspect)
input_par = float(c_width)/float(c_height)
out_width = 1920
out_height = round(float(out_width) / input_par)
hmod = out_height - (floor(out_height / 16 ) * 16)
out_height = (hmod > 4) ? (out_height + (16 - hmod)) : (out_height - hmod)
new_aspect = (float(out_width) / float(out_height)) / fixed_aspect
autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=new_aspect,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
BicubicResize(out_width,out_height,0,0.5)
RemoveGrain(mode=2)
===========================================================
[25-9-2005 1:34:30] Duration was: 7 hours 42 minutes 41 seconds
[25-9-2005 1:34:30] Speed was: 5,69 fps.
[25-9-2005 1:34:30] Warning! Found different number of frames: 197470
[25-9-2005 1:34:30] Audio1 size: 395,333,450 bytes (377.02 Mb)
[25-9-2005 1:34:30] Overhead: 1,372,672 bytes (1.31 Mb)
[25-9-2005 1:34:30] Video size: 4,269,457,078 bytes (4071.67 Mb)
[25-9-2005 1:34:30] Expected quality of first pass size: 38,94
[25-9-2005 1:34:30] Trying to adjust settings.
[25-9-2005 1:34:30] No adjustment is possible
[25-9-2005 1:34:30] Running second pass.
[25-9-2005 14:19:33] Duration was: 12 hours 45 minutes 2 seconds
[25-9-2005 14:19:33] Speed was: 4,30 fps.
[25-9-2005 14:19:33] Job finished. Total time: 21 hours 30 minutes 49 seconds

[CWR03]

Can you post your computer hardware configuration? What you're describing sounds more like inadequate hardware. Your chosen bitrate and aspect could easily be overwhelming the transfer rate of your hard drive or motherboard's FSB.

Edit: message meant for BodoWitcha

[BodoWitcha]

Sorry the labels are in Dutch, but the information is most of the time selfdescribing.

In short an Asus motherboard P5GD2 De Luxe with 2Gb RAM
3 RAID0 disks 2x250G 2x250G 4x250G
FSB running at 800MHz

Naam van besturingssysteem Microsoft Windows XP Professional
Versie 5.1.2600 Service Pack 2 Build 2600
Fabrikant Microsoft Corporation
Systeemnaam VIDEO
Systeemfabrikant To Be Filled By O.E.M.
Systeemmodel To Be Filled By O.E.M.
Systeemtype Op x86 gebaseerde pc
Processor x86 Family 15 Model 4 Stepping 1 GenuineIntel ~3211 Mhz
Processor x86 Family 15 Model 4 Stepping 1 GenuineIntel ~3211 Mhz
BIOS-versie/datum American Megatrends Inc. 1007.002, 21-3-2005
SMBIOS-versie 2.3
Map van Windows C:\WINDOWS
Systeemmap C:\WINDOWS\system32
Opstartapparaat \Device\HarddiskVolume3
Landinstelling Nederland
Hardware Abstraction Layer Versie = "5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)"
Gebruikersnaam VIDEO\bob
Tijdzone West-Europa (standaardtijd)
Totaal fysiek geheugen 2.048,00 MB
Beschikbaar fysiek geheugen 1,10 GB
Totaal virtueel geheugen 2,00 GB
Beschikbaar virtueel geheugen 1,96 GB
Ruimte voor wisselbestand 3,35 GB
Wisselbestand C:\pagefile.sys

Schijf A:
Beschrijving 3,5-inch diskettestation

Schijf C:
Beschrijving Lokale vaste schijf
Compressie Nee
Bestandssysteem NTFS
Omvang 32,00 GB (34.356.961.280 bytes)
Beschikbare ruimte 6,17 GB (6.622.044.160 bytes)
Volumenaam Drive0p1
Serienummer van volume F062F198

Schijf D:
Beschrijving Lokale vaste schijf
Compressie Nee
Bestandssysteem NTFS
Omvang 433,77 GB (465.756.479.488 bytes)
Beschikbare ruimte 339,05 GB (364.051.558.400 bytes)
Volumenaam Drive0p2
Serienummer van volume 202C9A84

Schijf E:
Beschrijving Lokale vaste schijf
Compressie Nee
Bestandssysteem NTFS
Omvang 457,99 GB (491.764.781.056 bytes)
Beschikbare ruimte 328,95 GB (353.207.586.816 bytes)
Volumenaam Raid
Serienummer van volume 785DD798

Schijf F:
Beschrijving Lokale vaste schijf
Compressie Nee
Bestandssysteem NTFS
Omvang 931,53 GB (1.000.226.914.304 bytes)
Beschikbare ruimte 151,71 GB (162.896.482.304 bytes)
Volumenaam Raid2
Serienummer van volume F0C1429A

[BodoWitcha]

Your chosen bitrate and aspect could easily be overwhelming the transfer rate of your hard drive or motherboard's FSB.

I did not choose the bitrates and aspect, but they were chosen by AGK.

The same file is played on 3 other computers and the IO-DATA HDNetwork Multi AV Player 2, all with the same behaviour.

Some of the HD files compressed with AGK are playing without problems.

As stated earlier I did not find a pattern of the reason why many of the compressed files are playing without problems and some om them are not.

[len0x]

I did not choose the bitrates and aspect, but they were chosen by AGK.


not true - source has 1280 width while you're forcing it to be 1920...

[CWR03]

not true - source has 1280 width while you're forcing it to be 1920...

Right, and even though it does appear that the computer specs you posted would be more than adequate to play a file of this size, it's certainly unnecessary to use an aspect larger than the source. You simply can't improve a picture just by making it bigger. It may be irrelevant to your problem, but I'd suggest reencoding it, or a portion, matching the output res. to the input. There's also a setting in hidden options to select converting 60fps to 23.976 that might be worth a try.

[len0x]

according to the logs AutoGK already restores 24 fps video out of 60fps...

[BodoWitcha]

not true - source has 1280 width while you're forcing it to be 1920...
Sorry.
I overlooked the source width. I will retry with the setting the 1280.

[BodoWitcha]

I overlooked the source width. I will retry with the setting the 1280.
I have re-rendered the same movie with a fixed 1280 width setting. Problem as reported at the beginning of this thread still present.

[len0x]

I overlooked this "different number of frames" problem that can be an issue. I'll have a look, but dunno when I'm going to be releasing next version of AutoGK (as I just stopped the project).

[laserfan]

I have converted 1080i stuff without problems, I do recall seeing a "number of frames" error once, but honestly I think it might have been in VideoReDo.

So it's possible that any "number of frames" problem I might have had w/my file was repaired w/VRD before even getting to AGK.

[len0x]

1080i sources do not have this problem as they are usually 29.97fps. 720p on the other hand is 60fps and I can confirm that handling of those is broken in current version (but only if they are detected as FILM, in which case you can manually set them as 23.976 via hidden options).

[BodoWitcha]

I have done some additional testing with different media players using the problem file.

The original problem was reported with of BPlayer Pro 1.36
I have played the compressed file also with the Nero Showtime, Media Player Classic, DivX player, Pinnacle Showcenter 200, AVEL Linkplayer2. They exhibit the following problems.


The Nero Showtime displays the movie smoothly, but much faster then the sound.
The Media Player Classic - faster pictures, disturbed sound (PTS matching seems to work)
DivX player (v6) - Almost right display of pictures and sound. Only the sound is almost a second out of sync.
AVEL Linkplayer 2 - Pictures ok. Sound via AC3 of Yamaha Amplifier shows it is AC3, but short moments are audible for shorter then a second sometimes minutes apart, and not in sync.
Pinnacle Showcenter 200 - Pictures ok - Sound problems the same as with the AVEL Linkplayer 2

One of the conclusions is that in the reporting of these kind of problems, I (we) have to include the details of the media player.

[BodoWitcha]

To have a faster turnaround I have made a smaller testfile of the source Transport Stream file (1280x720p60). This file is around 360 MB (188 (TS packetsize) times 2,000,000) and is taken from the beginning of the original file. This subset file was compressed with identical parameters as the complete file (12 Gb).

The target was set to 132 Mb (same compression ratio).

The resulting compressed file plays however without problems on all my media players.
When the 2 logfiles are compared they alsmost to the end identical.

The most significant difference are the 2 lines in the log of the large file:
[28-9-2005 22:56:25] Trying to adjust settings.
[28-9-2005 22:56:25] No adjustment is possible

There is some truth in the remark at the beginning of this track that the problem only occurs with larger files.

Hereafter are the 2 last parts of the logs:
First the smaller subset file:
===========================================================
[2-10-2005 23:55:06] Duration was: 6 minutes 11 seconds
[2-10-2005 23:55:06] Speed was: 12,76 fps.
[2-10-2005 23:55:06] Warning! Found different number of frames: 5919
[2-10-2005 23:55:06] Audio1 size: 11,849,426 bytes (11.30 Mb)
[2-10-2005 23:55:06] Overhead: 41,216 bytes (0.04 Mb)
[2-10-2005 23:55:06] Video size: 126,521,390 bytes (120.66 Mb)
[2-10-2005 23:55:06] Expected quality of first pass size: 64,10
[2-10-2005 23:55:06] Running second pass.
[3-10-2005 0:03:32] Duration was: 8 minutes 25 seconds
[3-10-2005 0:03:32] Speed was: 11,71 fps.
[3-10-2005 0:03:32] Job finished. Total time: 19 minutes 49 seconds


And this for the complete file:
===========================================================
[28-9-2005 22:56:24] Duration was: 3 hours 34 minutes 48 seconds
[28-9-2005 22:56:24] Speed was: 12,26 fps.
[28-9-2005 22:56:25] Warning! Found different number of frames: 197470
[28-9-2005 22:56:25] Audio1 size: 395,333,450 bytes (377.02 Mb)
[28-9-2005 22:56:25] Overhead: 1,372,672 bytes (1.31 Mb)
[28-9-2005 22:56:25] Video size: 4,269,457,078 bytes (4071.67 Mb)
[28-9-2005 22:56:25] Expected quality of first pass size: 60,93
[28-9-2005 22:56:25] Trying to adjust settings.
[28-9-2005 22:56:25] No adjustment is possible
[28-9-2005 22:56:25] Running second pass.
[29-9-2005 4:12:26] Duration was: 5 hours 16 minutes 0 seconds
[29-9-2005 4:12:26] Speed was: 10,41 fps.
[29-9-2005 4:12:26] Job finished. Total time: 9 hours 28 minutes 17 seconds

Sofar I have no idea what is causing the reported problems. Creating a smaller test file to recreate faster results was not succesful.

For completeness hereafter the complete logfile for the subset file:
2-10-2005 23:43:43] AutoGK 2.18b
[2-10-2005 23:43:43] OS: WinXP (5.1.2600).2
[2-10-2005 23:43:43] Job started.
[2-10-2005 23:43:43] Input file: E:\KillBillVolume2HD_Subset.ts
[2-10-2005 23:43:43] Output file: D:\KillBillVolume2HD_Subset.avi
[2-10-2005 23:43:43] Output codec: XviD
[2-10-2005 23:43:43] Audio 1: PID 0014, Private AC3 Audio Stream
[2-10-2005 23:43:43] Subtitles: none
[2-10-2005 23:43:43] Format: .AVI
[2-10-2005 23:43:43] Target size: 132Mb
[2-10-2005 23:43:43] Custom resolution settings: fixed width of 1280 pixels
[2-10-2005 23:43:43] Custom audio settings: Original
[2-10-2005 23:43:43] Started encoding.
[2-10-2005 23:43:43] Demuxing and indexing.
[2-10-2005 23:43:57] Processing file: E:\KillBillVolume2HD_Subset.ts
[2-10-2005 23:43:57] Source resolution: 1280x720
[2-10-2005 23:43:57] Found NTSC source.
[2-10-2005 23:43:57] Source aspect ratio: 16:9
[2-10-2005 23:43:57] Analyzing 60fps HDTV source.
[2-10-2005 23:44:26] Percentage of 3:2 dupe patterns: 95,35
[2-10-2005 23:44:26] Found 24fps FILM source.
[2-10-2005 23:44:26] Output will contain 4736 frames
[2-10-2005 23:44:26] Audio1 size: 11,849,426 bytes (11.30 Mb)
[2-10-2005 23:44:26] Overhead: 32,896 bytes (0.03 Mb)
[2-10-2005 23:44:26] Video size: 126,529,710 bytes (120.67 Mb)
[2-10-2005 23:44:26] Running compressibility test.
[2-10-2005 23:44:26] Writing the following script to D:\agk_tmp\KillBillVolume2HD_Subset_comptest.avs
===========================================================
LoadPlugin("C:\PROGRA~1\AutoGK\DGMPGDec\DGDecode.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\autocrop.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\decomb.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\RemoveGrainSSE2.dll")

movie = mpeg2source("D:\agk_tmp\KillBillVolume2HD_Subset.d2v")
movie = SelectEven(movie).Decimate(5)
cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=0,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
fixed_aspect = 1
c_width = width(cropclip)
c_height = round(height(cropclip) / fixed_aspect)
input_par = float(c_width)/float(c_height)
out_width = 1280
out_height = round(float(out_width) / input_par)
hmod = out_height - (floor(out_height / 16 ) * 16)
out_height = (hmod > 4) ? (out_height + (16 - hmod)) : (out_height - hmod)
new_aspect = (float(out_width) / float(out_height)) / fixed_aspect
autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=new_aspect,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
LanczosResize(out_width,out_height)
RemoveGrain(mode=2)
SelectRangeEvery(35,15)
===========================================================
[2-10-2005 23:48:55] Duration was: 4 minutes 29 seconds
[2-10-2005 23:48:55] Speed was: 7,57 fps.
[2-10-2005 23:48:55] Compressibility percentage is: 130,78
[2-10-2005 23:48:55] Using sharper matrix
[2-10-2005 23:48:55] Switching b-frames off
[2-10-2005 23:48:55] Chosen resolution is: 1280x528 ( AR: 2,42 )
[2-10-2005 23:48:55] Predicted comptest value is: 73,47
[2-10-2005 23:48:55] Running first pass.
[2-10-2005 23:48:55] Writing the following script to D:\agk_tmp\KillBillVolume2HD_Subset_movie.avs
===========================================================
LoadPlugin("C:\PROGRA~1\AutoGK\DGMPGDec\DGDecode.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\autocrop.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\decomb.dll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\RemoveGrainSSE2.dll")

movie = mpeg2source("D:\agk_tmp\KillBillVolume2HD_Subset.d2v")
movie = SelectEven(movie).Decimate(5)
cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=0,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
fixed_aspect = 1
c_width = width(cropclip)
c_height = round(height(cropclip) / fixed_aspect)
input_par = float(c_width)/float(c_height)
out_width = 1280
out_height = round(float(out_width) / input_par)
hmod = out_height - (floor(out_height / 16 ) * 16)
out_height = (hmod > 4) ? (out_height + (16 - hmod)) : (out_height - hmod)
new_aspect = (float(out_width) / float(out_height)) / fixed_aspect
autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=new_aspect,threshold=34,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
LanczosResize(out_width,out_height)
RemoveGrain(mode=2)
===========================================================
[2-10-2005 23:55:06] Duration was: 6 minutes 11 seconds
[2-10-2005 23:55:06] Speed was: 12,76 fps.
[2-10-2005 23:55:06] Warning! Found different number of frames: 5919
[2-10-2005 23:55:06] Audio1 size: 11,849,426 bytes (11.30 Mb)
[2-10-2005 23:55:06] Overhead: 41,216 bytes (0.04 Mb)
[2-10-2005 23:55:06] Video size: 126,521,390 bytes (120.66 Mb)
[2-10-2005 23:55:06] Expected quality of first pass size: 64,10
[2-10-2005 23:55:06] Running second pass.
[3-10-2005 0:03:32] Duration was: 8 minutes 25 seconds
[3-10-2005 0:03:32] Speed was: 11,71 fps.
[3-10-2005 0:03:32] Job finished. Total time: 19 minutes 49 seconds

[rocket_robot]

This maybe a long shot, but I have had similar results with some HD Episodes of Battlestar Galactica, also 1080i. I went through and tried every option, not really knowing what they all meant. In the end It actually seemed that I was doing the right thing regards the video, it was just that the Audio was screwed, because when I chose mp3 as audio it was completely fine and played back ok.

What i did was this: Run the .ac3 audio file through besweet. Don't do any conversion just let it output a new version with very similar file sizes. Then use NanDub (the other version of VDUBMOD) to re-mux the audio. I found that this makes the avi file playback perfectly.

b.t.w. I have also noticed that the ac3 file from DGINDEX sometimes shows 448khz when it is actually only 384khz?!? Could this be part of the problem?