import os
import vidi
+#FONT_DESC = "Andale Mono, 72"
+FONT_DESC = "Mono, 72"
+
+SAMPLE_LENGTH_SECONDS = 4
+
+# 48000 samples per seconds, at 1024 samples per buffer
+NUM_AUDIO_BUFFERS = round(SAMPLE_LENGTH_SECONDS * 48000 / 1024)
LIVE_PIPELINE_TEMPLATE = """
videotestsrc num-buffers=1 pattern=black ! \
- textoverlay valignment=center halignment=center font-desc="Sans, 72" text="{0}" ! \
+ textoverlay valignment=center halignment=center font-desc="%s" text="{0}" ! \
autovideosink \
- audiotestsrc num-buffers=100 freq={1:f} ! \
+ audiotestsrc num-buffers=%d freq={1:f} ! audio/x-raw,rate=48000 ! \
autoaudiosink
-"""
-
-#FONT_DESC = "Andale Mono, 72"
-FONT_DESC = "Mono, 72"
+""" % (FONT_DESC, NUM_AUDIO_BUFFERS)
FILE_PIPELINE_TEMPLATE = """
matroskamux name=mux ! filesink location="{2}/sample_{0}.mkv"
videotestsrc num-buffers=1 pattern=black ! \
textoverlay valignment=center halignment=center font-desc="%s" text="{0}" ! \
queue ! schroenc rate-control=3 ! mux.
- audiotestsrc num-buffers=100 freq={1:f} ! \
+ audiotestsrc num-buffers=%d freq={1:f} ! audio/x-raw,rate=48000 ! \
queue ! audioconvert ! vorbisenc quality=0.5 ! queue ! mux.
-""" % FONT_DESC
+""" % (FONT_DESC, NUM_AUDIO_BUFFERS)
def create_test_videofont(pipeline_template, notes_range, destination_dir=None):