AviSynth

Gordian Knot Rip Pack is a legacy, all-in-one DVD ripping and video encoding suite that acts as a centralized interface to orchestrate separate power-user tools like DVDDecrypter, AviSynth, DGIndex/DVD2AVI, and VirtualDubMod. Popularized in the early-to-mid 2000s, it was the gold standard for achieving high-quality video encoding by utilizing multi-pass DivX and XviD (MPEG-4 ASP) codecs.

Because the software does not manage the entire pipeline internally, achieving high quality requires setting up a sequential chain of specific tools. Step 1: Extract the DVD (Ripping)

Before encoding, you must extract the raw data from the physical disc. Run DVDDecrypter to read the DVD file structure. Select IFO Mode to isolate the main movie title track.

Stream-process the files to rip the necessary video (.VOB) and audio (.AC3 or .DTS) tracks directly to your hard drive. Step 2: Create the Index File (Indexing)

Gordian Knot cannot read raw .VOB files directly. It relies on an index file to map out the frame structure.

Open DGIndex (or DVD2AVI depending on your version package). Load the ripped VOB files into the timeline.

Set Audio to Demux to separate the raw audio stream without re-encoding it. Save the Project to generate a .d2v index file. Step 3: Configure Gordian Knot (Bitrate & Resolution)

Once indexed, load the project into the main Gordian Knot application interface to calculate optimization metrics. Load the .d2v file into the “Ripping” or “Bitrate” tab.

Select the target file size (traditionally 700MB to fit on a CD, or 1400MB for higher visual retention).

Configure the Audio tab by adding the demuxed .AC3 file so Gordian Knot can subtract its exact size from your overall video budget.

Adjust the Resolution tab by cropping the black bars out of the movie frames and using the “Bits/(Pixel*Frame)” metric (aim for a value between 0.20 and 0.30 for top-tier clarity). Step 4: Generate the AviSynth Script (Filtering)

AviSynth acts as the background frame-server that processes video frames on the fly before passing them to the encoder.

Click “Save & OE” (Open Encoder) from the video preview window.

Apply Deinterlacing or IVTC (Inverse Telecine) under the filters tab if your source material is an old interlaced TV broadcast or NTSC DVD.

Select a Resizing Filter like Lanczos for sharp details, or Bicubic for a smoother look. Save the script as an .avs file. Step 5: Perform the Multi-Pass Encode

Gordian Knot automates VirtualDubMod to render the actual video frames using your chosen MPEG-4 codec. DVD Ripping to XviD with Gordian Knot – Scribd