DGMPGDec 3.0.0.1 / DGDecNV 2.59

DGMPGDec is a free tool pair that reads MPEG-2 video from DVDs, TV recordings and transport streams into AviSynth with every frame in place.

DGIndex scans the video and writes an index file, and DGDecode serves the frames to your AviSynth script from that index.

Version 3.0.0.1 is the current release, and the download page also carries DGDecNV 259, the NVIDIA-accelerated sibling for MPEG-2, AVC, HEVC and VC-1.

What DGMPGDec Actually Does

Older tools such as DVD2AVI could lose a few frames at the start or end of a stream, which pushed the audio out of sync. DGMPGDec returns every coded frame and lets you jump to any frame accurately.

• DGIndex - open VOB, MPG, M2V, TS, M2TS or PVA files, set a crop if you like, and save a .d2v project. It also pulls out the audio as AC3, DTS, AAC, MPA or LPCM.
• DGDecode - an AviSynth plugin. One line, MPEG2Source("movie.d2v"), loads the video into your script.

It works with AviSynth+ and AviSynth 2.6, and can also feed VapourSynth.

What Changed in 3.0.0.1

Version 3.0.0.1, from August 2025, is a small fix for VapourSynth users. Streams coded at 1088 lines now come out at their real 1080, and the crop you set in DGIndex is now applied.

It builds on 3.0.0.0, which made the tools 64-bit only and dropped the old VFAPI frameserver. That release also added an indexing_path option and stopped MPEG2Source from overwriting your settings when it indexes a file automatically.

For an old 32-bit setup, take 2.0.9 from the download page. It is the last version with a 32-bit DGIndex and DGDecode, and it ships a 64-bit DGDecode alongside.

DGDecNV: The GPU Version

DGDecNV does the same indexing job but decodes on an NVIDIA graphics card. It handles MPEG-2, AVC (H.264), HEVC and VC-1, which makes it the choice for Blu-ray and HDTV sources.

It needs an NVIDIA card with a video decode engine; for HEVC, a GTX 1050 or newer is the practical minimum. Keep your NVIDIA driver current, as laptops and Remote Desktop are not officially supported.

DGDecNV has been freeware since 2021, after years as a paid tool. The current build is 64-bit only and comes with two versions of the plugin, one for any modern processor and a faster one for CPUs with AVX2.

What Is New in DGDecNV 259

Build 259, released in October 2026, follows 258 closely, so the two are best read together.

• Faster frame delivery - DGSource() hands frames over about 23 percent faster on an 8K 10-bit HEVC test clip, at the cost of one extra decoded frame in memory.
• HDR to SDR on the GPU - the built-in tone mapping now checks its settings properly, so a wrong h2s_mode value gives an error instead of silently picking the other mode.
• Cleaner filters - fixes for a stripe artifact in chroma denoising, colour shifts on odd frame heights, combing with bob deinterlacing, and several crashes in the levels and tweak filters.
• Memory leaks fixed - reloading a script many times no longer slowly eats memory, in AviSynth or VapourSynth.
• MKV demuxing - the "MKV add AUDs" option no longer produces green, damaged video on multi-slice AVC and HEVC streams.

The older DGDecNV 2053 builds still on the download page date from 2023 and include 32-bit versions. Use them only if you are stuck on a 32-bit chain.

Where It Fits in an Encode

A typical DVD job runs like this: rip the disc to VOB files, index them in DGIndex, filter in an AviSynth script, then encode with x264 or x265.

MeGUI runs DGIndex for you and builds the script, and StaxRip can use DGDecNV for hardware-decoded sources.

For audio, eac3to handles demuxing and converting the tracks, and MKVToolNix puts video, audio and subtitles together at the end.

Who Should Look Elsewhere

If you just want a DVD as an MP4 file, HandBrake does it in a few clicks with no scripts. To back up a disc to MKV without re-encoding, MakeMKV is simpler.

To just play MPEG-2 files, VLC Media Player needs nothing extra. Windows apps can use the MPEG-2 Video Extension.

Many modern scripts load sources with the LSMASHSource or FFMS2 plugins instead, which open almost any format without an index step. DGMPGDec still wins for frame accuracy on difficult MPEG-2 captures.

Quick questions

More frameservers and encoding tools are in our Video Codecs section.

Download DGMPGDec 3.0.0.1 or DGDecNV, or tell us what you index with it.