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ffv1 decoder written in pure rust

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# A Rust FFV1 Decoder

[![LICENSE](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/rust-av/ffv1/master/LICENSE)
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A pure-Rust FFV1 decoder based on this [Go](https://github.com/dwbuiten/go-ffv1)
implementation. A great and personal thanks to
[@dwbuiten](https://github.com/dwbuiten) for developing it and all
[FFV1](https://github.com/FFmpeg/FFV1) people involved in writing the
relative specifications.

This project has been developed with the aim of testing parallelism.

## Building library

Debug mode:

```bash
cargo build
```

Release mode:

```bash
cargo build --release
```

## Building decoder

```bash
cargo build --release --workspace
```

## Run decoder

```bash
cargo run --release --package ffv1-decoder -- -i INPUT_FILEPATH -o OUTPUT_FILEPATH
```

You can reproduce your raw file with `ffplay` from `FFmpeg` specifying
the video parameters associated to the `raw` output file.

For example, if we consider the output produced using `ffv1_v3.mkv`, called
`ffv1_v3.raw`, you should run the following command:

```bash
ffplay -f rawvideo -pixel_format yuv420p -video_size 640x360 -framerate 25 output.raw
```

## Notes

The code is still in flux and pretty messed up. No parallelism has been
implemented for now, so the library is pretty slow.

## License

Released under the [MIT License](LICENSE).

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