Any way to change reading blocksize of input file?

[davep]

Hi all,

I've noticed that regardless of how many simultaneous threads are running and whatever settings I choose, FFAStrans/ffmpeg always seems to read from the disk with approx 190KB block size (see the attached screenshot, it's the red line).

I was wondering if there's any way for it to read 512KB or 1024KB at a time, to reduce the overall IO on the drive.

I'm going to be transcoding media which will be on a RAID so I'd like to minimise the IO requests if possible, making fewer but larger IO requests.

It seems that ffmpeg has a blocksize setting (see here: https://ffmpeg.org/ffmpeg-all.html#file) but I can't seem to get it working in the custom ffmpeg module (as it requires modifying the -i parameter which presumably FFA uses to set the correct source path).

Anyone have any ideas? Or is the blocksize for reads fixed internally in FFA?

Many thanks again,
Dave

[admin]

Hi Dave,

FFAStrans has no specific settings on block reading size but I will take a look at the ffmpeg input file options and how they can be utilized. Thanks for notifying

-steinar

[emcodem]

Hey Dave, this could maybe help you:
viewtopic.php?f=5&t=849&p=3641#p3641

cheers!

[davep]

That looks interesting, will have a look, thanks!