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SVP 12 what do the slices do and do they affect YouTube videos

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Viktor Pareigis
SVP 12 what do the slices do and do they affect YouTube videos
on Apr 10, 2014 at 7:39:37 am

I'm currently working with the canon xa 10, Vegas Pro 12 and I was wondering if the "Number of Slices" option in the Main Concept avc/aac really matter what they are set on.

her are my current settings for my youtube uploads


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Norman Black
Re: SVP 12 what do the slices do and do they affect YouTube videos
on Apr 10, 2014 at 2:31:03 pm

You can safely set slices to 1 for everything. Only Blu-ray level 4.1 requires 4 slices.

Each slice divides the screen into a completely independent piece. As such, more slices can reduce the ability of the encoder to compress a file efficiently.

The reason for slices is to speed up decoding. Each slice is completely independent and so each can be decoded independently. This is why Blu-ray spec'd slices for level 4.1. It is cheaper and easier to implement four simple hardware decoders than one faster more complex decoder. Maybe not so much now, but when Blu-ray was being dreamed up it was more of a concern.

Exactly what software decoders on computers do with slices is unknown to me. Youtube/Vimeo re-encode our uploads without slices.


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