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FFmpeg is extremely powerful, but its command-line interface gets really complicated really quickly - especially when working with signal graphs and doing anything more than trivial.
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FFmpeg is extremely powerful, but its command-line interface gets really complicated rather quickly - especially when working with signal graphs and doing anything more than t
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rivial.
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Take for example a signal graph that looks like this:
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@@ -111,17 +113,6 @@ Here are a few:
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See the [Examples README](https://github.com/kkroening/ffmpeg-python/tree/master/examples) for additional examples.
API documentation is automatically generated from python docstrings and hosted on github pages: https://kkroening.github.io/ffmpeg-python/
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Alternatively, standard python help is available, such as at the python REPL prompt as follows:
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```python
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>>>import ffmpeg
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>>>help(ffmpeg)
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```
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## Custom Filters
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Don't see the filter you're looking for? `ffmpeg-python` includes shorthand notation for some of the most commonly used filters (such as `concat`), but it's easy to use any arbitrary ffmpeg filter:
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When in doubt, refer to the [existing filters](https://github.com/kkroening/ffmpeg-python/blob/master/ffmpeg/_filters.py), [examples](https://github.com/kkroening/ffmpeg-python/tree/master/examples), and/or the [official ffmpeg documentation](https://ffmpeg.org/ffmpeg-filters.html).
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## Frequently asked questions
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**Why do I get an import/attribute/etc error from `import ffmpeg`?*
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Make sure you ran `pip install ffmpeg-python` and not `pip install ffmpeg` or `pip install python-ffmpeg`.
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**How do I do XYZ?**
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Take a look at each of the links in the [Additional Resources](https://kkroening.github.io/ffmpeg-python/) section at the end of this README. If you look everywhere and can't find what you're looking for and have a question that may be relevant to other users, you may open an issue asking how to do it, while providing a thorough explanation of what you're trying to do and what you've tried so far.
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Issues not directly related to `ffmpeg-python` or issues asking others to write your code for you or how to do the work of solving a complex signal processing problem for you that's not relevant to other users will be closed.
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That said, we hope to continue improving our documentation and provide a community of support for people using `ffmpeg-python` to do cool and exciting things.
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**Why did my audio stream get dropped?**
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Some ffmpeg filters drop audio streams, and care must be taken to preserve the audio in the final output. The ``.audio`` and ``.video`` operators can be used to reference the audio/video portions of a stream so that they can be processed separately and then re-combined later in the pipeline.
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This dilemma is intrinsic to ffmpeg, and ffmpeg-python tries to stay out of the way while users may refer to the official ffmpeg documentation as to why certain filters drop audio.
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As usual, take a look at the [Examples](https://github.com/kkroening/ffmpeg-python/tree/master/examples#audiovideo-pipeline) (the "Audio/video pipeline" example in particular).
Feel free to report any bugs or submit feature requests.
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One of the best things you can do to help make `ffmpeg-python` better is to answer [open questions](https://github.com/kkroening/ffmpeg-python/labels/question) in the issue tracker. The questions that are answered will be tagged and eventually incorporated into the documentation, examples, and other learning resources.
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If you notice things that could be better in the documentation or overall development experience, please say so in the [issue tracker](https://github.com/kkroening/ffmpeg-python/issues). And of course, feel free to report any bugs or submit feature requests.
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It's generally straightforward to use filters that aren't explicitly built into `ffmpeg-python`but if there's a feature you'd like to see included in the library, head over to the [issue tracker](https://github.com/kkroening/ffmpeg-python/issues).
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Pull requests are welcome as well, but it wouldn't hurt to touch base in the issue tracker or hop on the [Matrix chat channel](https://riot.im/app/#/room/#ffmpeg-python:matrix.org) first.
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Pull requests are welcome as well.
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Anyone who fixes any of the [open bugs](https://github.com/kkroening/ffmpeg-python/labels/bug) or implements [requested enhancements](https://github.com/kkroening/ffmpeg-python/labels/enhancement) is a hero, but changes should include passing tests.
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<br />
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