Script to compare video

[Insane2986]

Hi, I'm trying to use StackVertical to compare 2 different DVD encodings.

Here's what I have:
clip1 = DirectShowSource("I:\OUTPUT\HC Encoder\VIDEO_TS\VTS_01_1.VOB")
clip2 = DirectShowSource("I:\OUTPUT\QMatOp 6 Pass\VIDEO_TS\VTS_01_1.VOB")
StackVertical(clip1, clip2)

I loaded the .avs in virtualdubmod. However, the frames between the movies seem to be out of sync. Is there any way to correct this?

[stickboy]

Trim one of the clips until they match.

[Pookie]

From the AviSynth Site:

# If Videos start at different frames
frameadjust=0

# Videos to compare: (v1 is original, v2 is encoded or whatever)

v1 = AviSource("g:\v1.avi").trim(frameadjust,0)
v2 = AviSource("g:\v2.avi")

[Insane2986]

Thanks for the help, but I'm still having problems :(

The videos start at the same frame, and I have no problem with the frames staying sync'ed when I hit play in virtualdub (or go frame by frame). The minute I try to fast forward, or skip to another part of the movie, the frames become out of sync.

[foxyshadis]

Since you're working with vobs, perhaps you should try mpeg2source. Many DSS splitters are notoriously bad at seeking to exact frames so random access isn't guaranteed perfect.

[Insane2986]

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\MPEG2Dec3.dll")

clip1 = MPEG2Source("I:\OUTPUT\HC Encoder\VIDEO_TS\VTS_01_1.VOB")
clip2 = MPEG2Source("I:\OUTPUT\QMatOp 6 Pass\VIDEO_TS\VTS_01_1.VOB")
StackVertical(clip1, clip2)

Virtualdub says "Avisynth open failure: MPEG2source: couldn't open file" :(

[communist]

MPEG2Source works by loading d2v files which you can create by using DGIndex, which also comes with a newer version of a MPEG2 decoder.

There are also other ways to compare videos. See here (http://forum.doom9.org/showthread.php?p=727216#post727216).

[Insane2986]

I demuxed the video and tried to open this script

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\MPEG2Dec3.dll")

clip1 = MPEG2Source("I:\OUTPUT\HC Encoder\VIDEO_TS\VTS_01_1.d2v")
clip2 = MPEG2Source("I:\OUTPUT\QMatOp 6 Pass\VIDEO_TS\VTS_01_1.d2v")
StackVertical(clip1, clip2)

and I get "Avisynth open failure: couldn't open file (C:\Documents and Settings\admin1\Desktop\script.avs, line 3)"

Any ideas? :(

[stickboy]

Did you use DGIndex to create those d2v files?

[Insane2986]

Yes, I opened VTS_01_1.VOB and did "save project and demux video"

[stickboy]

It looks like you're using the old mpeg2dec3.dll.

You should be using dgdecode.dll that came with DGIndex.

If that doesn't help:
Double check the path to the d2v files.
Make sure you didn't move the VOB files after you generated the d2v files.

[Insane2986]

dgdecode.dll worked. Thanks :)

Also the frames appear to be sync'ed up with one another, so all is good.