Method to read audio

Author: Anton Schirg

.gitignore

@@ -34,3 +34,6 @@ nosetests.xml
 .mr.developer.cfg
 .project
 .pydevproject
+
+#PyCharm
+.idea

read_audio.py

@@ -0,0 +1,38 @@
+from scipy.io import wavfile
+import os
+import subprocess
+from tempfile import NamedTemporaryFile
+
+
+def from_file(path):
+    '''
+    Converts file to wav using ffmpeg and reads the wav. Returns sample rate, audio data
+    '''
+
+    if not os.path.exists(path):
+        raise ValueError('File not found')
+
+    if not os.path.isfile(path):
+        raise ValueError('Path is no file')
+
+    if not os.access(path, os.R_OK):
+        raise IOError('File is not readable')
+
+    output = NamedTemporaryFile(mode="rb", delete=False)
+    ffmpeg_call = ['ffmpeg',
+                   '-y',  # always overwrite existing files
+                   "-i", os.path.abspath(path),  # input_file options (filename last)
+                   "-vn",  # Drop any video streams if there are any
+                   "-ac", "1",  # Convert audio to mono
+                   "-f", "wav",  # output options (filename last)
+                   output.name
+                   ]
+
+    subprocess.call(ffmpeg_call, stderr=open(os.devnull))
+
+    sr, data = wavfile.read(output.name)
+
+    output.close()
+    os.remove(output.name)
+
+    return sr, data