将字节范围转换为html 中的时间范围

I have some sever-side code that currently supports the http byte range requests without an issue. However, I want to be able to transcode the video file (which is located on-disk) on-the-fly with ffmpeg before I send the transcoded chunk to the client, but ffmpeg requires I give it a seek time whereas I get byte ranges from the client. How would I be able to figure out the time range (seek time) of a video file given the byte range from the client browser?I have some sever-side code that currently supp