streaming to peertube
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172
README.md
172
README.md
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# video-processing
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Prerequisities
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--------------
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Install the collection of command line video4linux utilities
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> `sudo apt-get install v4l-utils`
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Lists all available cameras
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> `v4l2-ctl --list-devices`
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```
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USB Video device: USB Camera (usb-0000:01:00.0-1.1.4):
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/dev/video0
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/dev/video1
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```
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List available formats for your camera `/dev/video0` (e.g. [Logitech QuickCam Pro 9000](https://download01.logitech.com/support/25174.1.0.pdf))
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> `v4l2-ctl -d /dev/video0 --list-formats-ext`
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```
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ioctl: VIDIOC_ENUM_FMT
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Type: Video Capture
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[0]: 'MJPG' (Motion-JPEG, compressed)
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Size: Discrete 160x120
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 176x144
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 320x240
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 352x288
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 640x480
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 800x600
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 960x720
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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[1]: 'YUYV' (YUYV 4:2:2)
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Size: Discrete 160x120
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 176x144
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 320x240
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 352x288
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 640x480
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Interval: Discrete 0.033s (30.000 fps)
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 800x600
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Interval: Discrete 0.040s (25.000 fps)
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Interval: Discrete 0.050s (20.000 fps)
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Interval: Discrete 0.067s (15.000 fps)
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 960x720
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Interval: Discrete 0.100s (10.000 fps)
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Interval: Discrete 0.200s (5.000 fps)
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Size: Discrete 1600x1200
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Interval: Discrete 0.200s (5.000 fps)
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```
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Lists all available recording devices
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> `arecord -l`
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```
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**** List of CAPTURE Hardware Devices ****
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card 1: Q9000 [QuickCam Pro 9000], device 0: USB Audio [USB Audio]
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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```
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Live Streaming
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--------------
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Use you own `LIVE-STREAM-KEY` and run
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### Live stream camera to peertube
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> `ffmpeg -hide_banner -f v4l2 -framerate 15 -video_size 1600x1200 -input_format yuyv422 -i /dev/video0 -vcodec libx264 -tune zerolatency -b:v 1M -maxrate 1M -bufsize 2M -f flv rtmp://peertube.virtonline.eu:1935/live/LIVE-STREAM-KEY`
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### Live stream desktop to peertube
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Note: Does not work on Waylad ([What is Wayland in Linux Distros and Should You Use it?](https://www.ubuntupit.com/what-is-wayland-in-linux-distros-and-should-you-use-it/)). You can quickly check whether you're using X or Wayland `echo $XDG_SESSION_TYPE`
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> `DISPLAY=:0 ffmpeg -hide_banner -f x11grab -framerate 5 -video_size 830x630 -i :0.0+50,95 -vf format=pix_fmts=yuv420p -vcodec libx264 -tune zerolatency -preset veryfast -f flv rtmp://peertube.virtonline.eu:1935/live/LIVE-STREAM-KEY`
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### Live stream camera with sound and desktop as an overlay to peertube
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> `DISPLAY=:0` # select display (only if run remotely e.g. ssh)
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`ffmpeg -hide_banner` # do not output compile flags
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`-thread_queue_size 4096 -f pulse -ac 2 -i default` # audio input from PulseAudio
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`-thread_queue_size 512 -f v4l2 -framerate 5 -video_size 1600x1200 -input_format yuyv422 -i /dev/video0` # camera input
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`-thread_queue_size 512 -f x11grab -framerate 5 -video_size 830x630 -i :0.0+50,95` # 830x630 window from screen 0 with offset 50,95
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`-filter_complex 'overlay=main_w-overlay_w:main_h-overlay_h'` # picture-in-picture
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`-c:v libx264 -tune zerolatency -preset ultrafast -b:v 1M -maxrate 1M -bufsize 2M` # output video codec
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`-c:a aac -b:a 64k` # output audio codec
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`-f flv` # output container
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`rtmp://peertube.virtonline.eu:1935/live/LIVE-STREAM-KEY` # peertube streaming url
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Adjusting camera functions
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--------------------------
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Brightness, zoom, focus, etc, can be adjusted
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> `v4l2-ctl -L`
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```
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brightness 0x00980900 (int) : min=-64 max=64 step=1 default=0 value=0
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contrast 0x00980901 (int) : min=0 max=95 step=1 default=0 value=0
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saturation 0x00980902 (int) : min=0 max=100 step=1 default=64 value=64
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hue 0x00980903 (int) : min=-2000 max=2000 step=1 default=0 value=0
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white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
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gamma 0x00980910 (int) : min=100 max=300 step=1 default=100 value=100
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power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
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0: Disabled
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1: 50 Hz
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2: 60 Hz
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white_balance_temperature 0x0098091a (int) : min=2800 max=6500 step=10 default=4600 value=4600 flags=inactive
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sharpness 0x0098091b (int) : min=1 max=7 step=1 default=2 value=2
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backlight_compensation 0x0098091c (int) : min=0 max=1 step=1 default=0 value=0
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exposure_auto 0x009a0901 (menu) : min=0 max=3 default=3 value=3
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1: Manual Mode
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3: Aperture Priority Mode
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exposure_auto_priority 0x009a0903 (bool) : default=0 value=1
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```
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Then adjust the value:
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> `v4l2-ctl -c <option>=<value>`
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