Example-2: (USB-Camera → Encode → Decode → Display) - 2020.2 English

H.264/H.265 Video Codec Unit v1.2 Solutions LogiCORE IP Product Guide (PG252)

Document ID
PG252
Release Date
2020-11-24
Version
2020.2 English
  1. Connect USB camera to the board (Verified Cameras: Logitech HD camera, C920).
  2. Run the following command for USB video capture serial pipeline
    vcu-demo-camera-encode-decode-display.sh -s 640x480
  3. Run the following commands for USB video capture serial pipeline with audio for the applicable setting:
    ALSA Library API
    vcu-demo-camera-encode-decode-display.sh -s 640x480 -a aac --use-alsasrc -i "hw:1,0" --use-alsasink --audio-output "hw:0,0"
    Pulse Library API
    vcu-demo-camera-encode-decode-display.sh -s 640x480 -a aac -i "alsa_input.usb-  
    046d_HD_Pro_Webcam_C920_C06272EF-02. analog-stereo" \
    --use-pulsesrc --use-pulsesink --audio-output "alsa_output. 
    platform-fd4a0000.zynqmp- display_zynqmp_dp_snd_card. analog-stereo"
    Gstreamer Autoaudiosrc and Autoaudiosink plugins
    vcu-demo-camera-encode-decode-display.sh -s 640x480 -a aac
    Note: In above example using gstreamer auto plugins, gstreamer selects the API and devices to be used for capture and playback automatically. Normally, it tries to use default devices enumerated at bootup by pulseaudio server or as mentioned in the alsa configuration file. So, it might not choose the device you want to use sometimes, in which case you can use the above-mentioned script arguments.
    Note: For selecting the values of arguments to be passed to -i and ---audio-output option, refer section 10.2.