Add video trimmer utility script

utils/trimmer.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+import argparse
+import subprocess
+import re
+
+def hhmmss_to_seconds(time_str):
+    """Convert hh:mm:ss to total seconds."""
+    parts = list(map(int, time_str.split(':')))
+    if len(parts) == 3:
+        h, m, s = parts
+    elif len(parts) == 2:
+        h = 0
+        m, s = parts
+    elif len(parts) == 1:
+        h = 0
+        m = 0
+        s = parts[0]
+    else:
+        raise ValueError("Invalid time format")
+    return h * 3600 + m * 60 + s
+
+def get_video_duration(filename):
+    """Return video duration in seconds using ffprobe."""
+    cmd = [
+        "ffprobe", "-v", "error", "-show_entries",
+        "format=duration", "-of",
+        "default=noprint_wrappers=1:nokey=1", filename
+    ]
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    return float(result.stdout.strip())
+
+def trim_video(input_file, output_file, remove_start=None, remove_end=None):
+    # Convert times to seconds
+    start_sec = hhmmss_to_seconds(remove_start) if remove_start else 0
+    duration = None
+    if remove_end:
+        total_duration = get_video_duration(input_file)
+        end_sec = hhmmss_to_seconds(remove_end)
+        duration = total_duration - start_sec - end_sec
+        if duration <= 0:
+            raise ValueError("Trim times are too long; resulting duration is <= 0")
+    
+    cmd = ["ffmpeg", "-y"]
+    if start_sec > 0:
+        cmd += ["-ss", str(start_sec)]
+    cmd += ["-i", input_file]
+    if duration:
+        cmd += ["-t", str(duration)]
+    cmd += ["-c", "copy", output_file]
+
+    print("Running command:", " ".join(cmd))
+    subprocess.run(cmd, check=True)
+
+def main():
+    parser = argparse.ArgumentParser(description="Trim video start/end times")
+    parser.add_argument("input_file", help="Input video file")
+    parser.add_argument("output_file", help="Output trimmed video file")
+    parser.add_argument("--remove-start", help="Time to remove from start (hh:mm:ss)")
+    parser.add_argument("--remove-end", help="Time to remove from end (hh:mm:ss)")
+    args = parser.parse_args()
+
+    trim_video(args.input_file, args.output_file, args.remove_start, args.remove_end)
+
+if __name__ == "__main__":
+    main()