Camera board • Re: "Or Better"?

We need only do something about that 1st frame being stretched.

Try adding a short delay before starting the recording.
As per this version, which also has a more generic way of defining the ScalerCrop to allow for different camera versions.

Code:

#!/usr/bin/python3# Encode and store a pair of side by side 1500x1500 image streams to give 3000x1500 video  at ~15fps.# Borrows callback techniques from stereo_preview.py example in Picamera github repository.from picamera2 import Picamera2, MappedArrayfrom picamera2.encoders import H264Encoderfrom picamera2.outputs import FfmpegOutputfrom libcamera import Transformimport timefps=15duration=20height=1500leftsize=(2*height,height) # define 2:1 format for left main streamrightsize=(height,height) # define 1:1 right main streamFrameTime=int(1000000/fps)# select fastest full format sensor mode# which is 5 for V2 camera : 1 for v3 : 2 for HQbinned2x2ffmode=2# adopt a mixture of callback methods to repackage downsampled left image# into left half of stream, and also package 1:1 right image into the other half. def mergeviews(request):    request_2 = cam2_request    if request_2 is None:        return    request_2.acquire()        with MappedArray(request, "main") as m1, MappedArray(request_2, "main") as m2:        #fill left half of original left array with half-width downsampled left camera view        m1.array[:,:height] = m1.array[:,::2]        #fill right half of left array with 1:1 right camera view        m1.array[:,height:] = m2.array    request_2.release()        def save_request(request):    # Store most recent request for use by other camera    global cam2_request    if cam2_request is not None:        cam2_request.release()    request.acquire()    cam2_request = requestlcam = Picamera2(0)rcam = Picamera2(1)# Select best modemode = lcam.sensor_modes[binned2x2ffmode]# Calculate dimensions for crop of central square full height region of sensorsensorsize=lcam.camera_properties['PixelArraySize']sensorwidth=sensorsize[0]sensorheight=sensorsize[1]x=(sensorwidth-sensorheight)//2crop=(x,0,sensorheight,sensorheight)# Configure both cameras to full format binned 2x2 mode and set the main stream to be 2:1 wide in left cam,# filled with the stretched central square zone of the sensor, right cam stream is set for equivalent square zone at 1:1.lconfig = lcam.create_video_configuration(sensor={"output_size": mode['size'], 'bit_depth':mode['bit_depth']},                                                  main={"format" :"RGB888","size":leftsize},                                                  controls={"ScalerCrop":crop,"FrameDurationLimits":(FrameTime,FrameTime)},                                                  transform=Transform(hflip=True,vflip=True),                                                  queue=False,                                                  )rconfig = lcam.create_video_configuration(sensor={"output_size": mode['size'], 'bit_depth':mode['bit_depth']},                                                  main={"format" :"RGB888","size":rightsize},                                                  controls={"ScalerCrop":crop,"FrameDurationLimits":(FrameTime,FrameTime)},                                                  transform=Transform(hflip=True,vflip=True),                                                  )lcam.configure(lconfig)rcam.configure(rconfig)# Prepare to encode and output to an mp4 fileencoder= H264Encoder(10000000)output= FfmpegOutput("Test_left_right_combining.mp4")lcam.start()rcam.start()cam2_request = Nonercam.pre_callback = save_requestlcam.pre_callback = mergeviews# Short delay to allow Ae and AWB to settle, and should also avoid recording unprocessed first frametime.sleep(1) # Record 20 seconds worthlcam.start_recording(encoder,output)time.sleep(duration)      lcam.stop_recording()

p1/i2c@80000/imx477@1a - Selected sensor format: 2028x1520-SRGGB12_1X12 - Selected CFE format: 2028x1520-PC1RException during process_requests()Traceback (most recent call last):  File "/usr/lib/python3/dist-packages/picamera2/previews/null_preview.py", line 85, in handle_request    picam2.process_requests(self)  File "/usr/lib/python3/dist-packages/picamera2/picamera2.py", line 1273, in process_requests    self.pre_callback(req)  File "/pop/fusion2.py", line 31, in mergeviews    request_2.acquire()  File "/usr/lib/python3/dist-packages/picamera2/request.py", line 120, in acquire    raise RuntimeError("CompletedRequest: acquiring lock with ref_count 0")RuntimeError: CompletedRequest: acquiring lock with ref_count 0Exception in thread Thread-2 (thread_func):Traceback (most recent call last):  File "/usr/lib/python3.11/threading.py", line 1038, in _bootstrap_inner    self.run()  File "/usr/lib/python3.11/threading.py", line 975, in runRuntimeError: CompletedRequest: acquiring lock with ref_count 0

Statistics: Posted by MRV — Mon Oct 21, 2024 5:38 am