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Скрипт для трансляции видео-потока с IK-камеры на экран для очков VR
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| from picamera import mmalobj as mo, mmal | |
| from signal import pause | |
| from time import sleep | |
| camera = mo.MMALCamera() | |
| splitter = mo.MMALSplitter() | |
| render_l = mo.MMALRenderer() | |
| render_r = mo.MMALRenderer() | |
| encoder = mo.MMALVideoEncoder() | |
| target = mo.MMALPythonTarget('low.h264') | |
| camera.outputs[0].framesize = (400, 480) | |
| camera.outputs[0].framerate = 30 | |
| camera.outputs[0].commit() | |
| camera.outputs[1].framesize = (400, 480) | |
| camera.outputs[1].framerate = 30 | |
| camera.outputs[1].params[mmal.MMAL_PARAMETER_CAPTURE] = True | |
| camera.outputs[1].commit() | |
| #encoder settings | |
| encoder.inputs[0].framesize = (400, 480) | |
| encoder.inputs[0].framerate = 25 | |
| encoder.inputs[0].format = mmal.MMAL_ENCODING_I420 | |
| encoder.inputs[0].commit() | |
| encoder.outputs[0].format = mmal.MMAL_ENCODING_H264 | |
| encoder.outputs[0].bitrate = 2000000 | |
| encoder.outputs[0].commit() | |
| p = encoder.outputs[0].params[mmal.MMAL_PARAMETER_PROFILE] | |
| p.profile[0].profile = mmal.MMAL_VIDEO_PROFILE_H264_HIGH | |
| p.profile[0].level = mmal.MMAL_VIDEO_LEVEL_H264_41 | |
| encoder.outputs[0].params[mmal.MMAL_PARAMETER_PROFILE] = p | |
| encoder.outputs[0].params[mmal.MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER] = True | |
| encoder.outputs[0].params[mmal.MMAL_PARAMETER_INTRAPERIOD] = 30 | |
| encoder.outputs[0].params[mmal.MMAL_PARAMETER_VIDEO_ENCODE_INITIAL_QUANT] = 22 | |
| encoder.outputs[0].params[mmal.MMAL_PARAMETER_VIDEO_ENCODE_MAX_QUANT] = 22 | |
| encoder.outputs[0].params[mmal.MMAL_PARAMETER_VIDEO_ENCODE_MIN_QUANT] = 22 | |
| p = render_l.inputs[0].params[mmal.MMAL_PARAMETER_DISPLAYREGION] | |
| p.set = mmal.MMAL_DISPLAY_SET_FULLSCREEN | mmal.MMAL_DISPLAY_SET_DEST_RECT | |
| p.fullscreen = False | |
| p.dest_rect = mmal.MMAL_RECT_T(0, 0, 400, 480) | |
| render_l.inputs[0].params[mmal.MMAL_PARAMETER_DISPLAYREGION] = p | |
| p.dest_rect = mmal.MMAL_RECT_T(400, 0, 400, 480) | |
| render_r.inputs[0].params[mmal.MMAL_PARAMETER_DISPLAYREGION] = p | |
| splitter.connect(camera.outputs[0]) | |
| render_l.connect(splitter.outputs[0]) | |
| render_r.connect(splitter.outputs[1]) | |
| encoder.inputs[0].connect(camera.outputs[1]) | |
| target.inputs[0].connect(encoder.outputs[0]) | |
| target.connection.enable() | |
| encoder.connection.enable() | |
| splitter.connection.enable() | |
| target.enable() | |
| encoder.enable() | |
| splitter.enable() | |
| render_l.enable() | |
| render_r.enable() | |
| try: | |
| pause() | |
| #test timer - switch with pause() | |
| sleep(3) | |
| finally: | |
| # Disable everything and tear down the pipeline | |
| target.disable() | |
| encoder.disable() | |
| #preview.disable() | |
| splitter.disable() | |
| render_l.disable() | |
| render_r.disable() | |
| target.inputs[0].disconnect() | |
| encoder.inputs[0].disconnect() | |
| #preview.inputs[0].disconnect() |
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