scripts/mpv-webcam at master · fbnmtz/scripts · GitHub

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#!/usr/bin/env bash
#
# ############################################################################
# Project: scripts (none)
# File...: mpv-webcam
# Created: Thursday, 2020/04/23 - 01:15:41
# Author.: @fbnmtz, (fabiano.matoz@gmail.com)
# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~~·~·~·~·~·~·~·~
# Last Modified: Monday, 2024/12/09 - 17:40:12
# Modified By..: @fbnmtz, (fabiano.matoz@gmail.com)
# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~~·~·~·~·~·~·~·~
# Version: 0.2.2.165
# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~~·~·~·~·~·~·~·~
# Description:
#  >
# ############################################################################
# HISTORY:
# https://wiki.archlinux.org/index.php/Webcam_setup
#
############################################
#

# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~
# shellcheck disable=SC1090,SC2154
#   * SC1090: Can't follow non-constant source. Use a directive to specify location.
#       -> cant follow or source usage
#   * SC2154: var is referenced but not assigned.
#       -> variables created by or library system (don't worry)

source "$xSHELL_INIT"
use args utils io
xrequirements dmenu:rofi mpv tr

# create default data directory
xsetHome

# app config file
APP_CONFIG=$APP_HOME/$APP.cfg
[ ! -f "$APP_CONFIG" ] && echo "menu_app=dmenu" > "$APP_CONFIG"
_MENU=$(rconfig menu_app "$APP_CONFIG")


xarg --id -m,--menu  --var menu+r    --desc "define menu to list webcam's"
xrun --xreject-unknow --xrequire-one --xversionrc --xcolors "$@"

[ -n "$menu" ] && { xrequirements "$menu"; _MENU=$menu; }

while true; do
    # shellcheck disable=SC2012
    # list all webcams and select one to use

    case "$_MENU" in
        rofi) _MENU='rofi -dmenu -no-config ' ;;
    esac

    device=$(ls /dev/video* | \
        tr -s ' ' '\n' | \
        $_MENU -p "$APP -> select a device:"
    )

    # device not empty?
    if [ -n "${device}" ]; then
        # open MPV with webcam as source
        mpv av://v4l2:"${device}" && exit;
    else
        # no input? escape on dmenu. lets leave.
        exit 1
    fi
done

# To use MJPEG as the pixelformat instead of the default, which in most cases is YUYV, you can run the following instead:
# mpv --demuxer-lavf-format=video4linux2 --demuxer-lavf-o-set=input_format=mjpeg av://v4l2:/dev/video0

# FFmpeg includes the video4linux2 and ALSA input devices that enable capturing webcam and audio input.

# The following command will record a video webcam.mp4 from the webcam without audio, assuming that the webcam is correctly recognized under /dev/video0:

# $ ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -c:v libx264 -preset ultrafast webcam.mp4
# where -video_size specifies the largest allowed image size from the webcam.

# The above produces a silent video. To record a video webcam.mp4 from the webcam with audio:

# $ ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -f alsa -i default -c:v libx264 -preset ultrafast -c:a aac webcam.mp4