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Trim MP4 End

Description​

The trim_mp4_end function trims a specified number of seconds from the end of an MP4 video. It uses ffmpeg to process the video and saves the trimmed result to a new file.

Function Signature:​

def trim_mp4_end(file_path: str, clip_length_in_s: int, seconds_to_trim: int, new_file_path: str) -> int:

Parameters​

  • file_path (str): The path to the original MP4 video file.
  • clip_length_in_s (int): The total length of the video in seconds.
  • seconds_to_trim (int): The number of seconds to trim from the end of the video.
  • new_file_path (str): The path where the trimmed video will be saved.

Returns​

  • int: The function returns 0 if the trimming is successful, or -1 if an error occurs.

Example Usage​

input_file = "/path/to/video.mp4"
output_file = "/path/to/trimmed_video.mp4"
clip_length_in_s = 120  # Total length of the video in seconds
seconds_to_trim = 10  # Trim the last 10 seconds

result = trim_mp4_end(input_file, clip_length_in_s, seconds_to_trim, output_file)

if result == 0:
    print("Video trimmed successfully.")
else:
    print("Error occurred during video trimming.")

Notes​

  • The function uses ffmpeg with the -t option to specify the end time for the trimmed video.
  • The video is copied without re-encoding (-c copy) to preserve quality and speed up the process.
  • The trimming process is done by specifying the end time in milliseconds.

Error Handling​

  • If any error occurs (e.g., invalid file paths, ffmpeg errors), the function will print the error message and return -1.