# mux to file with fake audio + video
gst-launch-1.0 -e videotestsrc ! x264enc ! mp4mux name=mux ! filesink location="bla.mp4"  audiotestsrc ! lamemp3enc ! mux.
# diff mux than above
gst-launch-1.0 -vv videotestsrc ! videoconvert ! x264enc ! avimux name=mux ! filesink location="avimux_test.mp4"  audiotestsrc ! voaacenc ! mux.^C

# above but with actual audio src
gst-launch-1.0 videotestsrc ! x264enc ! mp4mux name=mux ! filesink location="bla.mp4"  pulsesrc ! lamemp3enc ! mux.

# and.... yep now with actual video src
# audio a little low?
gst-launch-1.0 -e v4l2src device="/dev/video0" ! videoconvert ! queue ! x264enc tune=zerolatency ! mux. pulsesrc ! queue ! audioconvert ! audioresample ! voaacenc ! aacparse ! qtmux name=mux ! filesink location=test_gstreamer_record.mp4 sync=false

# same thing but works fine after restart. make sure alsa settings not screwed up tho?
gst-launch-1.0 -e v4l2src device="/dev/video0" ! videoconvert ! queue ! x264enc tune=zerolatency ! mux. alsasrc ! queue ! audioconvert ! audioresample ! voaacenc ! aacparse ! qtmux name=mux ! filesink location=test.mp4 sync=false

ffmpeg

# video record
ffmpeg -f v4l2 -framerate 25 -video_size 640_480 -i dev/video0 output.mkv

# video + audio record to file
./ffmpeg -f alsa -i hw:0 -f video4linux2 -i /dev/video0