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mp4grep 0.1.3 for Linux
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@o-oconnell o-oconnell released this 22 Mar 18:00
· 15 commits to main since this release
0.1.3-linux
6e903b1

mp4grep in OCaml. Installation and dependencies:

Installation

  1. Install Opam

  2. Create a new switch (version of the compiler) by running opam switch create mp4grep 4.12.0+domains+effects. This version is necessary as mp4grep will be updated to take advantage of multicore domains in OCaml.

  3. Install parmap on your new switch: opam install parmap.

  4. Download mp4grep, untar/zip it, and cd into its directory.

  5. Execute source configure.sh --prefix [location to install mp4grep]. On Linux a good choice might be ~/.local/bin, which is often in your $PATH.

  6. Run make install.

  7. You will need to specify your Vosk-compatible transcription model and directory for cached transcriptions by setting MP4GREP_MODEL and MP4GREP_CACHE. You'll probably want to export them in your .bashrc or .zshrc as well: export MP4GREP_MODEL=/full/path/of/model, export MP4GREP_CACHE=/full/path/of/cache/dir.

mp4grep-convert

The mp4grep executable only takes single-channel, 16000 Hz wav files as input. Running make install also provides you with mp4grep-convert, which is a Bash script that will take directories or audio files as its arguments, extract audio files from directories, and convert them to wav files using ffmpeg.

Dependencies

OCaml 4.12.0+domains+effects, parmap 1.2.4, and ffmpeg. The Makefile assumes that you have installed parmap using Opam, and looks under OPAM_INSTALL_PREFIX for it. You will have to modify the topmost ocamlc command in the Makefile if you have installed it another way.

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