Hi,
I'm trying to use ffmpeg to convert Prores streams to TIFF sequences.
I'd like to be able to start converting the file part way through, for
instance a 10 minute file, perhaps only 00:05:00 to 00:06:00.
But no matter the setting of -accurate_seek / -noaccurate_seek it
appears to take a long time to arrive at the starting position... almost
as long as just ripping the entire file from the beginning.
On a Mac using an official Prores implementation like Final Cut Pro,
seeking is immediate. Am I doing something wrong?
Doing:
ffmpeg -y -i input.mov -r 24 -pix_fmt rgb48le -vcodec tiff -ss 00:01:00
-to 00:01:01 tiff/%06d.tif
Takes almost as long as:
ffmpeg -y -i input.mov -r 24 -pix_fmt rgb48le -vcodec tiff -ss 00:00:00
-to 00:01:01 tiff/%06d.tif
Thanks,
Andrew
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