Major file reorganization

lib/utilities/ffmpeg_helper.py

@@ -0,0 +1,57 @@
+import subprocess
+import ffmpeg  # todo: remove all references to ffmpeg library and instead use direct subprocesses
+
+
+def file_info(path):
+    try:
+        return ffmpeg.probe(path)
+    except Exception as e:
+        print('Error getting ffmpeg info: ' + str(e))
+    return None
+
+
+def image_sequence_to_video(source_glob_pattern, output_path, framerate="24", encoder="libx264"):
+    subprocess.run(['ffmpeg', "-y", "-framerate", framerate, "-pattern_type", "glob", "-i", f"{source_glob_pattern}",
+                    "-c:v", encoder, output_path])
+
+
+def save_first_frame(source_path, dest_path, max_width=1280, run_async=False):
+    stream = ffmpeg.input(source_path)
+    stream = ffmpeg.output(stream, dest_path, **{'vf': f'format=yuv420p,scale={max_width}:trunc(ow/a/2)*2',
+                                                 'vframes': '1'})
+    return _run_output(stream, run_async)
+
+
+def generate_fast_preview(source_path, dest_path, max_width=1280, run_async=False):
+    stream = ffmpeg.input(source_path)
+    stream = ffmpeg.output(stream, dest_path, **{'vf': 'format=yuv420p,scale={width}:-2'.format(width=max_width),
+                                                 'preset': 'ultrafast'})
+    return _run_output(stream, run_async)
+
+
+def generate_thumbnail(source_path, dest_path, max_width=240, run_async=False):
+    stream = ffmpeg.input(source_path).video
+    stream = ffmpeg.output(stream, dest_path, **{'vf': f'scale={max_width}:trunc(ow/a/2)*2',
+                                                 'preset': 'veryfast',
+                                                 'r': '15',
+                                                 'c:v': 'libx265',
+                                                 'tag:v': 'hvc1'})
+    return _run_output(stream, run_async)
+
+
+def generate_prores_trim(source_path, dest_path, start_frame, end_frame, handles=10, run_async=False):
+    stream = ffmpeg.input(source_path)
+    stream = stream.trim(**{'start_frame': max(start_frame-handles, 0), 'end_frame': end_frame + handles})
+    stream = stream.setpts('PTS-STARTPTS')  # reset timecode
+    stream = ffmpeg.output(stream, dest_path, strict='-2', **{'c:v': 'prores_ks', 'profile:v': 4})
+    return _run_output(stream, run_async)
+
+
+def _run_output(stream, run_async):
+    return ffmpeg.run_async(stream, quiet=True, overwrite_output=True) if run_async else \
+        ffmpeg.run(stream, quiet=True, overwrite_output=True)
+
+
+if __name__ == '__main__':
+    x = generate_thumbnail("/Users/brett/Desktop/pexels.mp4", "/Users/brett/Desktop/test-output.mp4", max_width=320)
+    print(x)