shell/create_test_files.sh

   1 #!/bin/sh
   2
   3 set -e
   4 set -x
   5
   6 SECONDS=4
   7
   8 VIDEO_FRAMERATE=25
   9 VIDEO_BUFFERS=$(($VIDEO_FRAMERATE * $SECONDS))
  10
  11 AUDIO_SAMPLERATE=48000
  12 AUDIO_SAMPLESPERBUFFER=1024
  13 AUDIO_BUFFERS=$(($AUDIO_SAMPLERATE * $SECONDS / $AUDIO_SAMPLESPERBUFFER))
  14
  15 create_sample() {
  16   FREQ="$1"
  17   rm -f "sample_${FREQ}hz.webm"
  18   gst-launch-1.0 -e \
  19     webmmux name=mux ! filesink location="sample_${FREQ}hz.webm" \
  20     videotestsrc pattern=black num-buffers="$VIDEO_BUFFERS" ! video/x-raw,framerate="$VIDEO_FRAMERATE/1" ! \
  21         textoverlay valignment=center halignment=center font-desc="Mono, 72" text="${FREQ}Hz" ! \
  22         queue ! vp9enc ! mux. \
  23     audiotestsrc samplesperbuffer="$AUDIO_SAMPLESPERBUFFER" num-buffers="$AUDIO_BUFFERS" freq="$FREQ" ! audio/x-raw,rate="$AUDIO_SAMPLERATE" ! \
  24         queue ! audioconvert ! vorbisenc quality=0.5 ! queue ! mux.
  25 }
  26
  27 create_sample 440
  28 create_sample 880