https://github.com/svt/ffmpeg-filter-proxy

FFmpeg video proxy filter
https://github.com/svt/ffmpeg-filter-proxy

ffmpeg filter video-processing

Last synced: 3 months ago
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FFmpeg video proxy filter

• Host: GitHub
• URL: https://github.com/svt/ffmpeg-filter-proxy
• Owner: svt
• License: lgpl-2.1
• Created: 2020-03-27T09:30:30.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2024-10-17T12:29:49.000Z (4 months ago)
• Last Synced: 2024-10-19T16:56:43.943Z (4 months ago)
• Topics: ffmpeg, filter, video-processing
• Language: C
• Homepage:
• Size: 17.6 KB
• Stars: 4
• Watchers: 7
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# ffmpeg-filter-proxy

A [FFMpeg][1] video filter proxy.

## Purpose

- To make it easier to develop and test video filters for use in [FFmpeg][1].

- To make it easier to implement a video filter using different programming

  languages.

## Proxied filter

A dynamic shared object that provides the following signatures:

- `int filter_init(const char *config, void **user_data)`

- `int filter_frame(unsigned char *data, unsigned int data_size, int width, int height, int line_size, double ts_millis, void *user_data)`

- `void filter_uninit(void *user_data)`

On success, `filter_init` and `filter_frame` should return `0`.

A nonzero return value signals an error.

The `config` parameter to `filter_init` is filter implementation specific.

It could be a config filename or the complete config, or `NULL` if the proxied

filter doesn't need any specific configuration.

## Limitations

Only `AV_PIX_FMT_BGRA` is used right now since that's what we need.

It is possible though, to preserve 10 bit colors using the `clear` param in combination with FFmpegs split and overlay filters:

`-filter_complex "split=2[main][over1];[over1]proxy=clear=1:[over2];[main][over2]overlay=format=yuv420p10`

## License

Copyright 2020 Sveriges Television AB.

This software is released under the GNU Lesser General Public License

version 2.1 or later (LGPL v2.1+).

## Primary Maintainers

Christer Sandberg 

[1]: https://www.ffmpeg.org