java - Given the length of a video, how do I calculate how much how much space it will take after conversion? -


ok making video converter , whenever user inputs video, want able tell user how space on disc going take after conversion.

i using xuggler conversion task wrapper around ffmpeg. lets me access the total length of video in milliseconds long value.

based on this, how can calculate size of output video generated ?

that's tricky thing. because conversion involves doing decode , encode. , if observe encoding algorithm, uses transforms , many other steps, give different o/p different input streams. in plain words, size depends on complexity of raw video, not possible predict size effectively.


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