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Add example for assembling a video from numpy frames

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Przemysław Dolata 2021-01-27 11:44:11 +01:00 committed by GitHub
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@ -97,6 +97,25 @@ With additional filtering:
)
```
From a sequence of frames stored in memory (e.g. NumPy):
```python
# You need to know the frame size (h, w) and pixel format (e.g. OpenCV uses 8-bit BGR, so 'bgr24').
# For a complete list of pixel format codes run ffmpeg in terminal directly: 'ffmpeg -pix_fmts'
stream = (
ffmpeg
.input('pipe:', format='rawvideo', pix_fmt='bgr24', s='{}x{}'.format(h, w))
.output('movie.mp4', pix_fmt='yuv420p', r=60.0)
.run_async(pipe_stdin=True)
)
# Example below assumes each frame is stored as a NumPy array
for frame in frames:
data = frame.astype('uint8').tobytes() # whatever your source is - you need to convert data to bytes
stream.stdin.write(data)
stream.stdin.close()
stream.wait()
```
## Audio/video pipeline
<img src="https://raw.githubusercontent.com/kkroening/ffmpeg-python/master/examples/graphs/av-pipeline.png" alt="av-pipeline graph" width="80%" />