Extracting last ten audio minutes | Generated by AI
To get the last 10 minutes of the audio file lobby-zh.ogg, you need to use the following information:
- Total Duration: The input file duration is
00:33:34.40. - Desired Segment Length: 10 minutes (or 600 seconds).
- Start Time Calculation: You need to calculate the point 10 minutes before the end of the file.
Calculation
- Total duration in seconds: \((33 \times 60) + 34.40 = 1980 + 34.40 = 2014.40 \text{ seconds}\)
- Start time: \(2014.40 \text{ seconds} - 600 \text{ seconds} = 1414.40 \text{ seconds}\)
In HH:MM:SS.sss format:
\(1414.40 \text{ seconds} = 23 \text{ minutes and } 34.40 \text{ seconds} \quad (1414.40 / 60 = 23.5733\dots)\)
\(\text{Start Time} = 00:23:34.40\)
FFmpeg Command
You will use the -ss (seek to position) input option combined with the -t (duration) option.
-ss 00:23:34.40: Sets the starting position for the extraction.-t 00:10:00: Sets the duration of the output segment to exactly 10 minutes.
ffmpeg -i lobby-zh.ogg -ss 00:23:34.40 -t 00:10:00 last_10_minutes.ogg
Note: If you want to use the output file’s original bitrate/codec settings, you can add -c copy for faster processing:
ffmpeg -i lobby-zh.ogg -ss 00:23:34.40 -t 00:10:00 -c copy last_10_minutes_copy.ogg