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I like the idea of the `hwaccel` param to `av.open` to allow for some magic, e.g.:
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```
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av.open(..., hwaccel=True) # automatically set up what it can.
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av.open(..., hwaccel=True or 'auto') # automatically set up what it can.
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av.open(..., hwaccel='CUDA') # use cuda with default options
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av.open(..., hwaccel='/dev/gpu0') # use whatever device type with the given device
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av.open(..., hwaccel=dict(type='CUDA', device='/dev/gpu0', ...)) # more options
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```
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If there are no options to pass, consider using a tuple to pass the device:
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```
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av.open(..., hwaccel=('CUDA', '/dev/gpu0'))
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```
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## TODO
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- [x] `av.hwdevice.HWDeviceType` enum
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- [x] `av.codec.hwconfig.HWConfig`
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- [x] `av.codec.Codec.hardware_configs` tuple of `HWConfig`
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- [ ] Determine that there are even options to bother passing.
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- [ ] Determine that there are even options to bother passing; it doesn't look like it.
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- [ ] Design the `av.open` interface.
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- [ ] Implement it. |
