MPEG2 support in VirtualDubMod



How to open a MPEG2 file.

Buttons

Reset

Clip and Resize are reset to "zero" values. This leads in most cases to a distorted image.

Preview

Opens or closes a preview window so that you can see what you crop and resize.

Screenshot

When preview is on, output a time-stamped image in the BMP format to he output folder (chosen at the bottom of the dialog box).

Play

For debugging purposes. Don't click it.

OK

Generates the index file and maybe the audio files and then dismisses the dialog. Progress is displayed as a percentage.
The index file will be looked for the next time you open the file.
It looks like a .d2v file, but it is not, and is not compatible.

Cancel

Cancels file opening. On some occasions even closes VirtualDubMod (don't know why).

Audio

Audio is treated via hard disk only (for the moment). This means that "avi audio" in virtualdubmod is useless when opening MPEG2 files.
The audio part allows to select up to 2 audio streams that will be extracted to disk.
The audio streams contain indications about language only if a SmartRipper .txt info file was used. Otherwise only bitrate and stream information are available.

Keep AC3

Works for formats other than AC3: the stream is only demuxed, not decoded.

Decode to PCM

The stream is decoded to PCM (the most common output is 16-bit stereo at 48000 Hz).

Dolby Surround Downmix

When the stream is decoded to PCM, you can choose to create a stereo stream containing Dolby Surround information, that can be decoded by an adequate "3D" sound card or an external compatible amplifier to produce surround effects.

MPEG2 performance

For the best performance when using MPEG2 input, choose fast recompress (if you don't need VirtualDub's filters). The color space can be YUY2 (not bad) or YV12 (faster, same quality) depending on some factors : YV12 is not available The "fastest" mode is YV12 with bilinear resampling (no resampling at all is faster, of course...)

Future features

What I won't do : What I will do one day: