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DAT Video

Overview

This project contains utilities for reading and writing arbitrary data to DAT (digital audio tape) magnetic tapes. The DAT format specifies 48kHz, 2-channel, 16-bit PCM audio which lends itself to a rather high data rate of ~188kB/s. This is suitable for compressed video!

This tool is really just a minimalistic RFC-1662 framer that does encode and decode. It could be used for probably more things than storing binary data on a DAT tape - but that is why it exists in the first place.

Building

Build this tree with the usual cmake flow:

mkdir build
cd build
cmake ..
make -j`nproc`

Usage

You can run ./datvideo --help to receive a usage listing. Here are some examples of how it might be used with some ALSA utilities:

Encoding

./src/datvideo --encode \
    -i ~/Downloads/bbb_sunflower_1080p_60fps_normal_one_audio_h265.ts \
    --chunk_size 188 -o big_buck_bunny.bin
aplay --format=S16_LE --device=hw:2,0 \
    --channels=2 --rate=48000 --file-type=raw big_buck_bunny.bin

Decoding

arecord --format=S16_LE \
    --device=hw:2,0 --channels=2 --rate=48000 \
    --file-type=raw | ./src/datvideo --decode -o bbb.ts

About

Store arbitrary binary data (including video) on Digital Audio Tape (DAT).

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