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mpromonet / v4l2rtspserver

RTSP Server for V4L2 device capture supporting HEVC/H264/JPEG/VP8/VP9
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Green ffplay window instead of the camera's feed #322

Closed hilliao closed 6 months ago

hilliao commented 6 months ago

Describe the bug Using ffplay to show the video on the webcam, the video feed is green.

To Reproduce Steps to reproduce the behavior: Executing the command ffplay rtsp://192.168.1.4:8554/unicast to start the RTSP server on the webcam

./v4l2rtspserver
log level:500

[NOTICE] /home/hil/git/v4l2rtspserver/main.cpp:269
    Version: 0.3.8 live555 version:2023.11.30
[NOTICE] /home/hil/git/v4l2rtspserver/src/V4l2RTSPServer.cpp:37
    Create V4L2 Source.../dev/video0
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:133
    driver:uvcvideo capabilities:84a00001 mandatory:4000001
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:136
    /dev/video0 support capture
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:139
    /dev/video0 support streaming
[ERROR] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:212
    /dev/video0: Cannot set pixelformat to:H264 format is:MJPG
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:225
    /dev/video0:MJPG size:1920x1080 bufferSize:4177920
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:246
    fps:1/30
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2Device.cpp:247
    nbBuffer:0
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2MmapDevice.cpp:49
    Device /dev/video0
[NOTICE] /home/hil/git/v4l2rtspserver/libv4l2cpp/src/V4l2MmapDevice.cpp:73
    Device /dev/video0 nb buffer:10
[NOTICE] /home/hil/git/v4l2rtspserver/src/V4l2RTSPServer.cpp:62
    Create Source .../dev/video0
[NOTICE] /home/hil/git/v4l2rtspserver/inc/BaseServerMediaSubsession.h:49
    format:video/JPEG
[NOTICE] /home/hil/git/v4l2rtspserver/inc/V4l2RTSPServer.h:240
    Play this stream using the URL "rtsp://192.168.1.4:8554/unicast"
[NOTICE] /home/hil/git/v4l2rtspserver/src/V4L2DeviceSource.cpp:96
handleCmd_SETUP:SETUP rtsp://192.168.1.4:8554/unicast/track1 RTSP/1.0
Transport: RTP/AVP/UDP;unicast;client_port=12660-12661
CSeq: 3
User-Agent: Lavf60.3.100

^C  begin threadSIGINT

[NOTICE] /home/hil/git/v4l2rtspserver/main.cpp:357

observe the video feed window: image

Expected behavior Normal video feed shows on Logitech, Inc. Logitech Webcam C925e on a different PC using the same method to build and execute.

Desktop (please complete the following information):

mpromonet commented 6 months ago

Hi,

Maybe increasing log level will help you to get more information.

Best Regards, Michel.

hilliao commented 6 months ago

I think the webcam is not supported. I tried https://kaustavmukherjee-66179.medium.com/convert-any-webcam-into-ipcam-in-2-minutes-using-rtsp-server-and-ffmpeg-a27414f08af5 and had similar failures.

mpromonet commented 6 months ago

Hi,

This may depends on q field and quantification tables (see https://www.rfc-editor.org/rfc/rfc2435#appendix-A). q field is not decoded, code suppose quantification table are sent.

Best Regards, Michel.