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generate-test-data: generate real mp3s

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neingeist 2018-11-11 17:29:48 +01:00
parent 18381fffc2
commit 0c9053a4d7
1 changed files with 9 additions and 4 deletions
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13
generate-test-data.py
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@ -1,9 +1,16 @@
from datetime import datetime, timedelta from datetime import datetime, timedelta
import subprocess
KBITS = 128 KBITS = 128
bytes_per_second = KBITS * 1000 // 8 def generate_test_file(fn, delta):
subprocess.call(['ffmpeg',
'-f', 'lavfi',
'-i', 'sine=frequency=1000:duration=%d' % delta.total_seconds(),
'-b:a', '%dk' % KBITS,
fn])
start = datetime.now().replace(minute=0, second=0) - timedelta(hours=3) start = datetime.now().replace(minute=0, second=0) - timedelta(hours=3)
end = start + timedelta(hours=6) end = start + timedelta(hours=6)
@ -14,8 +21,6 @@ while t < end:
fn = 'tmp/qfhi-{:04d}{:02d}{:02d}-{:02d}{:02d}.mp3'.format( fn = 'tmp/qfhi-{:04d}{:02d}{:02d}-{:02d}{:02d}.mp3'.format(
t.year, t.month, t.day, t.hour, t.minute) t.year, t.month, t.day, t.hour, t.minute)
print(fn) print(fn)
f = open(fn, 'w') generate_test_file(fn, delta)
f.write('\0' * (int(delta.total_seconds()) * bytes_per_second))
f.close()
t += delta t += delta