Hey, I had this running on raspberryos for more than a year. Used it almost daily.

Okay - I figured out the Test is calling the VideoCapture() method with just th

module v4l2src0 reported: Internal data stream error. about harmonizeproject HOT 6 OPEN

mcpcapital commented on May 23, 2024

module v4l2src0 reported: Internal data stream error.

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vbartels commented on May 23, 2024

Okay - I figured out the Test script is calling the VideoCapture() method with just the index of the video device while the script itself gives the parameter cv2.CAP_GSTREAMER.

vc = cv2.VideoCapture(0)
vc = cv2.VideoCapture(0,cv2.CAP_GSTREAMER)

by removing the parameter the script seems to run - I can see that sync is active in the hue app. Unfortunately im not at home atm so I cant see if the lights are actually changing 🤣

I checked with videotest.py that the resolution is 640x360:

print("width: ")
print(vc.get(cv2.CAP_PROP_FRAME_WIDTH))
print("height: ")
print(vc.get(cv2.CAP_PROP_FRAME_HEIGHT))

I dont know if calling with cv2.CAP_GSTREAMER changes the resolution... I am to dumb to find a proper documentation I understand..

If found this:

def __gstreamer_pipeline(
        camera_id,
        capture_width=1920,
        capture_height=1080,
        display_width=1920,
        display_height=1080,
        framerate=30,
        flip_method=0,
    ):
    return (
            "nvarguscamerasrc sensor-id=%d ! "
            "video/x-raw(memory:NVMM), "
            "width=(int)%d, height=(int)%d, "
            "format=(string)NV12, framerate=(fraction)%d/1 ! "
            "nvvidconv flip-method=%d ! "
            "video/x-raw, width=(int)%d, height=(int)%d, format=(string)BGRx ! "
            "videoconvert ! "
            "video/x-raw, format=(string)BGR ! appsink max-buffers=1 drop=True"
            % (
                    camera_id,
                    capture_width,
                    capture_height,
                    framerate,
                    flip_method,
                    display_width,
                    display_height,
            )
    )
   
stream = cv2.VideoCapture(__gstreamer_pipeline(camera_id=0, flip_method=2), cv2.CAP_GSTREAMER)

Adding the define and changing the call of VideoCapture seems not to provoke the warnings/errors.. however, I dont get any video shown. I am a bit lost now.. I will try again when I have local access and dont have to fiddle with VPN.

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vbartels commented on May 23, 2024

At home.. changing
vc = cv2.VideoCapture(0,cv2.CAP_GSTREAMER)
to
vc = cv2.VideoCapture(0)
seems to have it solved for me. Lights are running back again - Yay! I cant see a difference to before.

Adding the last codesnippet above seems not to open the videodevice - just nothing happens. Seems like gstreamer is waiting for something.

Maybe somebody is able to explain ^^

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bradleydworak commented on May 23, 2024

Great news! What’s interesting is that VideoCapture should default to GStreamer anyway, so don’t quite understand either what the fuss is except if the VideoCapture is actually capturing via FFMPEG instead. If you would be willing to let me know if the following line works I would greatly appreciate it: cap = cv2.VideoCapture(0,cv2.CAP_FFMPEG) The code was revamped to mainly support gradient light strips, so the script should perform the same generally. Thanks, Brad

…

On Sat, Jan 7, 2023 at 9:12 AM vbartels ***@***.***> wrote: At home.. changing vc = cv2.VideoCapture(0,cv2.CAP_GSTREAMER) to vc = cv2.VideoCapture(0) seems to have it solved for me. Lights are running back again - Yay! I cant see a difference to before. Adding the last codesnippet above seems not to open the videodevice - just nothing happens. Seems like gstreamer is waiting for something. Maybe somebody is able to explain ^^ — Reply to this email directly, view it on GitHub <#34 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AANVBG47VCZIQSG74I654UTWRF2U5ANCNFSM6AAAAAATQVSL4Y> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

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vbartels commented on May 23, 2024

I tried that at first, because the line is still in the code. Unfortunately it results in:

./harmonize.py
--- Starting Harmonize Project ---
INFO: Single Hue bridge detected on network via mDNS.
Querying hue bridge for entertainment areas on local network.
groupid =  7
Using Entertainment area with group_id: 7
Starting computer vision engine...
--- INFO: Detected video capture card on /dev/video0 ---
Disabling streaming on Entertainment area...
ERROR: Unable to open capture device.

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bradleydworak commented on May 23, 2024

Thanks for trying it out. FFMPEG is arguably faster than GStreamer but I’ve never got it working. I’ll have to decide how to update the code if as you say it works with no parameters. I was using OpenCV 4.6. Perhaps 4.5 has some differences? Brad

…

On Sat, Jan 7, 2023 at 9:55 AM vbartels ***@***.***> wrote: I tried that at first, because the line is still in the code. Unfortunately it results in: ./harmonize.py --- Starting Harmonize Project --- INFO: Single Hue bridge detected on network via mDNS. Querying hue bridge for entertainment areas on local network. groupid = 7 Using Entertainment area with group_id: 7 Starting computer vision engine... --- INFO: Detected video capture card on /dev/video0 --- Disabling streaming on Entertainment area... ERROR: Unable to open capture device. — Reply to this email directly, view it on GitHub <#34 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AANVBG67GPXW34EZ6WW2CTTWRF7UXANCNFSM6AAAAAATQVSL4Y> . You are receiving this because you commented.Message ID: ***@***.***>

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vbartels commented on May 23, 2024

Not knowing much about python I fiddled around half the day.
my OpenCV has definetely ffmpeg support builtin:

>>> import cv2
>>> cv2.__version__
>>> info = cv2.getBuildInformation()
>>> video, parallel = info.index('Video'), info.index('Parallel')
>>> print(info[video:parallel])

results in:

'4.5.4'

Video I/O:
    DC1394:                      YES (2.2.6)
    FFMPEG:                      YES
      avcodec:                   YES (58.134.100)
      avformat:                  YES (58.76.100)
      avutil:                    YES (56.70.100)
      swscale:                   YES (5.9.100)
      avresample:                NO
    GStreamer:                   YES (1.19.90)
    PvAPI:                       NO
    v4l/v4l2:                    YES (linux/videodev2.h)
    gPhoto2:                     YES

But I didnt get any further. I also took a look into: ffmpegcv but was not able to get it reading from /dev/video0 . Sadly all the documentations are terrible....

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module v4l2src0 reported: Internal data stream error. about harmonizeproject HOT 6 OPEN

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