four streams, one mpegts

record.sh

#!/bin/bash

# pulsesrc ⇨ audioconvert ⇨ lamemp3enc
#                                  ⇩
#                                queue
#                                  ⇩
# queue ⇨ x264enc ⇨ queue ⇨ mpegtsmux ⇨ filesink
#   ⇧
#   ⇧         queue ⇦ jpegdec ⇦ jpegparse ⇦ v4l2src
#   ⇧         ⇙
#   videomixer ⇦ queue ⇦ jpegdec ⇦ jpegparse ⇦ v4l2src
#              ⇖
#              queue ⇦ videoconvert ⇦ Terminal


set -e

queue_bytes=$((2**24)) # 16mb queues between threads

timestamp=$(date -Im)

# write the final video to this file
outfile="$HOME/Video/gst-video0-${timestamp}.mpts"


# both cameras will capture in MJPG mode even though the C920 has support for H.264/1080p
# since it looks like either h264 is lagging or USB is. In any case running the same mode
# on both matches things up nicely
camera_resolution="width=1280, height=720"
camera0="/dev/video0" # Logitech C920
camera1="/dev/video1" # Microsoft Lifecam

# pactl list short
microphone="alsa_input.usb-BLUE_MICROPHONE_Blue_Snowball_201202-00-Snowball.analog-stereo"

# use xwininfo to get the window ID and update this
# I manually size the terminal window to 2560x1440 before running this script.
term_xid=0x4e0001d

set -x

gst-launch-1.0 --eos-on-shutdown -vvv \
  mpegtsmux name=mux ! \
    filesink location=$outfile \
  videomixer name=mix sink_1::xpos=1280 sink_2::ypos=720 ! \
    video/x-raw, width=2560, height=1440 ! \
    queue max-size-bytes=$queue_bytes ! \
    x264enc ! \
    queue max-size-bytes=$queue_bytes ! \
    mux. \
  v4l2src device=$camera0 do-timestamp=true ! \
    image/jpeg, $camera_resolution ! \
    jpegparse ! jpegdec ! \
    queue max-size-bytes=$queue_bytes ! \
    mix. \
  v4l2src device=$camera1 do-timestamp=true ! \
    image/jpeg, $camera_resolution ! \
    jpegparse ! jpegdec ! \
    queue max-size-bytes=$queue_bytes ! \
    mix. \
  ximagesrc xid=$term_xid ! \
    timeoverlay ! \
    videoconvert ! \
    queue max-size-bytes=$queue_bytes ! \
    mix. \
  pulsesrc device=$microphone name=microphone ! \
    audioconvert ! \
    lamemp3enc target=bitrate bitrate=64 cbr=true ! \
	queue max-size-bytes=$queue_bytes ! \
    mux.