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  • How do I use ffmpeg with live streaming from an IP camera [closed]

    28 février 2013, par Murali Hariharan

    My question is very basic because I am a newbie to all these
    technologies.

    I have an IP camera connected to my internal network.

    http://192.168.1.20/videostream.cgi?user=admin&pwd=

    ...gives a live streaming view in Firefox or Internet Explorer.

    Now I want to record the live stream into a video.

    The parameters to be supplied are begin_time, end_time, format of video etc.

    How do I accomplish this ?

    I appreciate any guidance.

  • How to trigger from button in UVC camera

    8 août 2016, par Buddhishan Manamperi

    I’m taking pictures from a webcam using Intel Edison. I was able to capture still images from the camera after installing uvc driver for linux and ffmpeg software. I use a script to capture.

    ./ffmpeg -s 640x640 -f video4linux2 -i /dev/video0 -vframes 1 image.jpeg;

    I want to capture the image from the button (in the web cam) press event. I used a USB analyzer in windows to analyze packets. It was found that URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER is transferring UP and DOWN when the button is pressed.

    Please Help me to implement button press triggering on Linux so that I could use it on Edison.

  • Web camera Logitech and Linux

    8 novembre 2019, par Nick Saw

    I have Logitech C310 camera with the declared characteristics of 720p 30fps.

    If you connect the camera to windows, the recording is fully consistent with the stated 720p 30fps - the picture is clear.

    The challenge is to connect the same camera to OrangePI (server Armbian) and to save video files on it.

    The camera appears as /dev/video0.

    sudo ffmpeg -f v4l2 -s 1280x720 -i /dev/video0 output.wmv

    As a result, I get a crumbly picture with a frequency of 5 fps.

    Maybe I’m using ffmpeg incorrectly ? Please help me who has experience with Web cameras on Linux ...
    Thanks in advance.

    USB-camera configuration :

    v4l2-ctl --all --device=/dev/video0
    

    

    
Driver Info (not using libv4l2):
    
        Driver name   : uvcvideo
    
        Card type     : UVC Camera (046d:081b)
    
        Bus info      : usb-1c1c000.usb-1
    
        Driver version: 4.14.18
    
        Capabilities  : 0x84200001
    
                Video Capture
    
                Streaming
    
                Extended Pix Format
    
                Device Capabilities
    
        Device Caps   : 0x04200001
    
                Video Capture
    
                Streaming
    
                Extended Pix Format
    
Priority: 2
    
Video input : 0 (Camera 1: ok)
    
Format Video Capture:
    
        Width/Height      : 1280/720
    
        Pixel Format      : 'YUYV'
    
        Field             : None
    
        Bytes per Line    : 2560
    
        Size Image        : 1843200
    
        Colorspace        : sRGB
    
        Transfer Function : Default
    
        YCbCr/HSV Encoding: Default
    
        Quantization      : Default
    
        Flags             :
    
Crop Capability Video Capture:
    
        Bounds      : Left 0, Top 0, Width 1280, Height 720
    
        Default     : Left 0, Top 0, Width 1280, Height 720
    
        Pixel Aspect: 1/1
    
Selection: crop_default, Left 0, Top 0, Width 1280, Height 720
    
Selection: crop_bounds, Left 0, Top 0, Width 1280, Height 720
    
Streaming Parameters Video Capture:
    
        Capabilities     : timeperframe
    
        Frames per second: 5.000 (5/1)
    
        Read buffers     : 0
    
                     brightness (int)    : min=0 max=255 step=1 default=128 value=128
    
                       contrast (int)    : min=0 max=255 step=1 default=32 value=32
    
                     saturation (int)    : min=0 max=255 step=1 default=32 value=32
    
 white_balance_temperature_auto (bool)   : default=1 value=1
    
                           gain (int)    : min=0 max=255 step=1 default=64 value=192
    
           power_line_frequency (menu)   : min=0 max=2 default=2 value=2
    
      white_balance_temperature (int)    : min=0 max=10000 step=10 default=4000 value=4610 flags=inactive
    
                      sharpness (int)    : min=0 max=255 step=1 default=24 value=24
    
         backlight_compensation (int)    : min=0 max=1 step=1 default=0 value=0
    
                  exposure_auto (menu)   : min=0 max=3 default=3 value=3
    
              exposure_absolute (int)    : min=1 max=10000 step=1 default=166 value=249 flags=inactive
    
         exposure_auto_priority (bool)   : default=0 value=1
    
                      led1_mode (menu)   : min=0 max=3 default=3 value=3
    
                 led1_frequency (int)    : min=0 max=131 step=1 default=0 value=0

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