Update pipelines/video_process.py

pipelines/video_process.py

@@ -1,13 +1,23 @@
 import subprocess
+import os
 
 def extract_audio_ffmpeg(in_video, out_audio="temp_audio.wav"):
+    """
+    Extracts the audio track from the given video file using FFmpeg.
+    Saves it to the specified WAV file.
+
+    :param in_video: Path to the input video file (e.g., MP4).
+    :param out_audio: Path to the output WAV file.
+    :return: The path to the output WAV file (same as out_audio).
+    :raises RuntimeError: If the ffmpeg command fails.
+    """
     cmd = [
         "ffmpeg", "-y",
         "-i", in_video,
-        "-vn",
+        "-vn",           # disable video
         "-acodec", "pcm_s16le",
-        "-ar", "16000",
-        "-ac", "1",
+        "-ar", "16000",  # sample rate
+        "-ac", "1",      # mono
         out_audio
     ]
     result = subprocess.run(cmd, capture_output=True)
@@ -15,13 +25,28 @@ def extract_audio_ffmpeg(in_video, out_audio="temp_audio.wav"):
         raise RuntimeError(f"FFmpeg audio extraction failed: {result.stderr.decode()}")
     return out_audio
 
+
 def apply_edits(original_video, edit_instructions):
     """
-    Suppose edit_instructions is a JSON or dictionary specifying which segments to keep.
-    We'll write them to a concat file or do a more advanced approach.
+    Applies editing instructions (e.g., cut segments, transitions) to the original video
+    and produces a final edited video file named 'edited_video.mp4'.
+
+    :param original_video: Path to the original video file.
+    :param edit_instructions: JSON/dict specifying which segments to keep,
+                              transitions, or other advanced edits.
+    :return: Path to the newly created 'edited_video.mp4'.
+    :raises RuntimeError: If ffmpeg or any editing command fails.
     """
-    # parse or generate concat script
-    # run ffmpeg to produce "edited_video.mp4"
+    # In a real implementation, you'd parse 'edit_instructions' to build an ffmpeg
+    # filter or a concat script. For now, we'll just return a placeholder path.
+    
     out_path = "edited_video.mp4"
-    # ...
+
+    # Example placeholder: direct copy (no edits).
+    # cmd = ["ffmpeg", "-y", "-i", original_video, "-c", "copy", out_path]
+    # result = subprocess.run(cmd, capture_output=True)
+    # if result.returncode != 0:
+    #     raise RuntimeError(f"FFmpeg editing error: {result.stderr.decode()}")
+
+    # Return the output path (in a real scenario, ensure the final file is actually created).
     return out_path