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Fix MMal no buffers available. #645

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Fix MMal no buffers available. #645

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6 changes: 5 additions & 1 deletion picamera/mmalobj.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1289,7 +1289,11 @@ def wrapper(port, buf):
finally:
buf.release()
try:
self._pool.send_buffer(block=False)
# Only try to send buffer if the port type is output
# or else we will suffer a MMAL no buffers available
# error.
if self._port[0].type == mmal.MMAL_PORT_TYPE_OUTPUT:
self._pool.send_buffer(block=False)
except PiCameraPortDisabled:
# The port was disabled, no point trying again
pass
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