Merge pull request #3691 from OpenShot/framerate-samplerate-utility

Utility to generate all incompatible Frame rates and Sample rates

Author: jonoomph

installer/test-framerates.py

@@ -0,0 +1,85 @@
+"""
+ @file
+ @brief Utility to determine which sample rates divide evenly by which frame rates
+ @author Jonathan Thomas <[email protected]>
+
+ @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]))