fixed ffmpeg errors and added cli

bin/lib/ffmpeg/ffmpeg/_probe.py

@@ -0,0 +1,30 @@
+import json
+import subprocess
+from ._run import Error
+from ._utils import convert_kwargs_to_cmd_line_args
+
+
+def probe(filename, cmd='ffprobe', timeout=None, **kwargs):
+    """Run ffprobe on the specified file and return a JSON representation of the output.
+
+    Raises:
+        :class:`ffmpeg.Error`: if ffprobe returns a non-zero exit code,
+            an :class:`Error` is returned with a generic error message.
+            The stderr output can be retrieved by accessing the
+            ``stderr`` property of the exception.
+    """
+    args = [cmd, '-show_format', '-show_streams', '-of', 'json']
+    args += convert_kwargs_to_cmd_line_args(kwargs)
+    args += [filename]
+
+    p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
+    communicate_kwargs = {}
+    if timeout is not None:
+        communicate_kwargs['timeout'] = timeout
+    out, err = p.communicate(**communicate_kwargs)
+    if p.returncode != 0:
+        raise Error('ffprobe', out, err)
+    return json.loads(out.decode('utf-8'))
+
+
+__all__ = ['probe']