How do I calculate the best tcrequant number from within a script when going from a DVD9 to a DVD5?
Once you have separated (using tcextract) the audio and the video, get the file sizes of the audio and video files. If you are burning to a DVD5, the maximum image size is 4700000000. So the following equation will give you a ‘best fit’ number. 1.04 is a fudge factor to leave space for the file system and other overhead. If you are including more that one audio stream or a subtitle stream, those filesizes must also be subtracted from the maximum dvd image size.
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