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"""
@file
@brief Utility to determine which sample rates divide evenly by which frame rates
@author Jonathan Thomas <jonathan@openshot.org>
@section LICENSE
Copyright (c) 2008-2020 OpenShot Studios, LLC
(http://www.openshotstudios.com). This file is part of
OpenShot Video Editor (http://www.openshot.org), an open-source project
dedicated to delivering high quality video editing and animation solutions
to the world.
OpenShot Video Editor is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenShot Video Editor is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
"""
import os
import math
import openshot
from src.classes import info
# Try to get the security-patched XML functions from defusedxml
try:
from defusedxml import minidom as xml
except ImportError:
from xml.dom import minidom as xml
all_fps = []
all_rates = [8000.0, 11025.0, 16000.0, 22050.0, 44100.0, 48000.0,
88200.0, 96000.0, 176400.0, 192000.0, 3528000.0, 384000.0]
# Loop through all profiles (include any FPS used in OpenShot)
for file in os.listdir(info.PROFILES_PATH):
filepath = os.path.join(info.PROFILES_PATH, file)
profile = openshot.Profile(filepath)
fps_num = profile.info.fps.num
fps_den = profile.info.fps.den
fps = float(fps_num) / float(fps_den)
if fps not in all_fps:
all_fps.append(fps)
# Loop through all export presets (include any sample rates used in OpenShot)
for file in os.listdir(info.EXPORT_PRESETS_PATH):
filepath = os.path.join(info.EXPORT_PRESETS_PATH, file)
xmldoc = xml.parse(filepath)
sampleRate = float(xmldoc.getElementsByTagName("samplerate")[0].childNodes[0].nodeValue)
if sampleRate not in all_rates:
all_rates.append(sampleRate)
# Display all common fps and sample rates
print("---------------------------------")
print("Common Sample Rates / Common FPS")
print("---------------------------------")
print("FPS: %s" % sorted(all_fps))
print("Sample Rates: %s" % sorted(all_rates))
print("---------------------------------")
print("GOOD = Sample rate evenly divisible by frame rate")
print("BAD = Sample rate NOT evenly divisible by frame rate")
print("---------------------------------\n")
print("(Sample Rate / FPS) = Samples Per Frame")
print("---------------------------------")
for fps in sorted(all_fps):
for rate in sorted(all_rates):
samples_per_frame = rate / fps
has_remainder = math.fmod(rate, fps)
if not has_remainder:
# Print good case with rounding to 2 digits
print("GOOD:\t%s / %.2f =\t%d" % (rate, fps, samples_per_frame))
else:
# Print bad case, without rounding the samples per frame
print("BAD:\t%s / %.2f =\t%s.%s" %
(rate, fps, str(samples_per_frame).split('.')[0], str(samples_per_frame).split('.')[1][:2]))
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