How to trim a video?
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I have a color video of about 10 minutes, and it also has an audio track. I have to trim it in order to extract the central 3 minutes.
I also need to avoid loss of quality (no compression) and to keep the corresponding audio.
Please, could anyone help me with an example code?
Thank you so much.
Walter Roberson on 23 Jun 2017
Vision.VideoFileReader is the only input routine that can currently handle audio and video combined, and Vision.VideoFileWriter is the only output routine that can currently handle audio and video combined.
The basic mechanism for trimming with them is to open the input, read and discard frames until you get to the point that you want to keep, and then start reading and writing the output.
Unfortunately the reader has no timecode information available, so if your input file is variable frame rate, there is no way to tell how far you are into the file other than frame number.