"USING MJPEGFPLAY"

Using mJPEGfPlay

Sequence preparation and keyboard controls.

Sequence Preparation

Building a sequence with FFmpeg.

A sequence is a directory with image files, optional audio files, and its metadata file. These can be prepared in any order.

Image Files

Using [FFmpeg], convert a video in.mkv into image files 1.jpg, 2.jpg, … with:

$ ffmpeg -i in.mkv -cmp rd -dct faan -mbcmp rd -mbd rd -precmp rd -subcmp rd -trellis 2 -huffman optimal -q:v 16 %d.jpg

The above should result with the best possible output under quality (-q:v) 16. FFmpeg's JPEG encoder quality setting ranges from 2 (best) to 31 (worst).

You can use -r and -s to set the output size and rate respectively.

While we recommend JPEG, Java--and mJPEGfPlay in turn--also supports reading PNG, (W)BMP, and GIF images. However, a sequence must stick to a format, manually specified by its metadata file.

Optional Audio Files

Also using FFmpeg, convert the same video into PCM with:

$ ffmpeg -i in.mkv 1.wav

Up to eight simultaneous audio streams are supported with separate files 1.wav, 2.wav, …, 8.wav. Only the first stream will be used as a timing pilot.

Metadata File

A metadata file metadata.edencfg can be made with mJPEGfPlay under File→New….

Keyboard Controls

Controlling most of mJPEGfPlay with your keyboard.

  • xPlay/Resume
  • zPause
  • qStop
  • sFast Rewind
  • dFast Forward
  • ←Step Backward
  • →Step Forward
  • [Jump To Start
  • ]Jump To End
  • \Jump To Frame…
  • aTrickplay
  • =Raise Volume (+10%)
  • -Lower Volume (-10%)
  • ↑Next Track
  • ↓Previous Track