AV1 Opus Encoder (Go Port)

This is a Go port of the av1_opus_encoder.py script, designed to be compiled into a standalone executable.

Prerequisites

• Go 1.21+: Required to compile the code.
• External Tools: The following tools must be in your system PATH:
  • ffmpeg
  • ffprobe
  • mkvmerge
  • opusenc
  • mediainfo
  • av1an
  • HandBrakeCLI
  • ffmsindex

Building

1. Open a terminal in this directory.
2. Run go mod tidy to ensure dependencies are resolved (standard library only, but good practice).
3. Build the executable:
   • Windows: go build -o av1-encoder.exe .
   • Linux: go build -o av1-encoder .

Usage

Place the executable in the directory containing your .mkv files and run it.

./av1-encoder [flags]

Flags

• --no-downmix: Preserve original audio channel layout (default: false, downmixes >5.1 to stereo/5.1 based on logic).
• --autocrop: Automatically detect and crop black bars (default: false).
• --speed: Set SVT-AV1 preset (e.g., slower, slow, medium, fast).
• --quality: Set SVT-AV1 quality (e.g., medium, high).
• --grain: Set film-grain synthesis level (int).

Moving to a New Git Repo

This directory is self-contained. You can move the entire av1-go folder to a new location and initialize a new git repository:

mv av1-go /path/to/new/location
cd /path/to/new/location
git init
git add .
git commit -m "Initial commit"