code release

xlib/ffmpeg/ffmpeg.py

@@ -0,0 +1,72 @@
+import json
+import subprocess
+
+
+def run(args, pipe_stdin=False, pipe_stdout=False, pipe_stderr=False, quiet_std_err=False):
+    """
+    run ffmpeg process
+
+    returns Popen class if success
+    otherwise None
+    """
+    args = ['ffmpeg'] + args
+    stdin_stream = subprocess.PIPE if pipe_stdin else None
+    stdout_stream = subprocess.PIPE if pipe_stdout else None
+    stderr_stream = subprocess.PIPE if pipe_stderr else None
+
+    if quiet_std_err:
+        stderr_stream = subprocess.DEVNULL
+
+    try:
+        return subprocess.Popen(args, stdin=stdin_stream, stdout=stdout_stream, stderr=stderr_stream)
+    except Exception as e:
+        print('ffmpeg exception: ', e)
+    return None
+
+
+def probe(filename):
+    """Run ffprobe on the specified file and return a JSON representation of the output.
+
+    Raises:
+        Exception if ffprobe returns a non-zero exit code,
+    """
+    args = ['ffprobe', '-show_format', '-show_streams', '-of', 'json', filename]
+
+    p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = p.communicate()
+    if p.returncode != 0:
+        raise Exception('ffprobe', out, err)
+    return json.loads(out.decode('utf-8'))
+
+def probe(filename):
+    """Run ffprobe on the specified file and return a JSON representation of the output.
+
+    Raises:
+        Exception if ffprobe returns a non-zero exit code,
+    """
+    args = ['ffprobe', '-show_format', '-show_streams', '-of', 'json', filename]
+    #'-count_frames',
+
+    p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = p.communicate()
+    if p.returncode != 0:
+        raise Exception('ffprobe', out, err)
+    return json.loads(out.decode('utf-8'))
+
+
+def run_play():
+    args = ['ffplay',
+            '-f', 'rawvideo',
+            '-pix_fmt', 'bgr24',
+            '-s', '256x144',
+            '-'
+            ]
+    stdin_stream = subprocess.PIPE
+    stdout_stream = None
+    stderr_stream = None#subprocess.DEVNULL
+
+    try:
+        return subprocess.Popen(args, stdin=stdin_stream, stdout=stdout_stream, stderr=stderr_stream)
+    except Exception as e:
+        print('ffplay exception: ', e)
+    return None