AviSynth issues regarding DVD decoding

[Inventive Software]

I'm doing some tests with AviSynth and DVD Decrypter to encode PAL DVDs into different video codecs. DVD Decrypter copies the movie video stream and the 6 channel AC3 stream into a VOB file. Because it's a FAT32 hard disk, the VOBs have to be 4 GB. I have CyberLink PowerDVD 5 installed to use the MPEG-2 DirectShow decoder. This is the AVS script I'm using to decode the VOB to be opened in VDubMod:

SegmentedDirectShowSource("C:\the_matrix_revolutions_d1\video_ts\vts_01.vob")

By checking the source movie files, there should be 185923 frames. Instead there is about 105000 frames, so there's a big chunk of the file missing. I also tried loading it in a media player, and still get the same result. Any guesses?

I have to use AviSynth to load the 2 VOBs, as VDubMod cannot splice VOBs.

I'm using VDubMod 1.5.10.1 on a Win98SE machine with 192 MB RAM and a 120 GB hard disk, so a 4 GB limit is unwantingly forced, with an NVIDIA 5200 PCI graphics card. (Yes, I know PCI is ****, but I don't have ANY damn AGP slots on the motherboard. It's 3 yrs old!)

[neuron2]

Use DGMPGDec for your VOB decoding.

[actionman133]

what i do is demux video and audio with dvd decrypter (resulting in an m2v file and an ac3 file) and load the video via DGDecode (part of DGMPEGDec). I use AC3Filter as the DirectShow filter for Dolby decoding.

Then for my script i use:


LoadPlugin ("...\DGDecode.dll")

Video1 = MPEG2Source ("xxxx.m2v", idct = 5) # 5 for P4 PC
Audio1 = DirectShowSource ("xxxx.ac3", video = false)

Video2 = MPEG2Source ("xxxx.m2v", idct = 5)
Audio2 = DirectShowSource ("xxxx.ac3", video = false)

Video3 = MPEG2Source ("xxxx.m2v", idct = 5)
Audio3 = DirectShowSource ("xxxx.ac3", video = false)

Video = Video1 + Video2 + Video3
Audio = Audio1 + Audio2 + Audio3 # or whatever is necessary

AudioDub (Video, Audio)
DelayAudio (0) # Delay as recorded, of course

# Then resize, crop, and filter as desired


It provides very fast decoding, and you can choose specific decoding options. much more controlled than PowerDVD's decoder.

[Inventive Software]

OK, I think I figured out what it was. The DVD does not decrypt properly, which is a slight problem.

I have done it similar to what you say there, but with the DirectShowSource and AC3filter, but I still get the same results as before.

Still got to try those 2 filters, and see how they do.

Gimme a couple of days for rigourous testing.