Re: [FFmpeg-user] Input Buffer ovverun with Decklink 8K Pro and Nvenc

2020-08-06 Thread jroch via ffmpeg-user
Seems more complicate than just BMD board.

Coz BMD supports stuff but nvenc supports other...




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Re: [FFmpeg-user] Input Buffer ovverun with Decklink 8K Pro and Nvenc

2020-08-05 Thread jroch via ffmpeg-user
Hi,

Thanks for answer

I figured out i was not setting pixel format. This helped and i'm now
encoding at real time.

It was failing in every mode without that param

About top post, sorry for that, i don't even think i know what this is
about.

J



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[FFmpeg-user] Input Buffer ovverun with Decklink 8K Pro and Nvenc

2020-08-05 Thread jroch via ffmpeg-user
Hi

I'm trying to encode a live 8K footage from a decklink 8k p ro card using
nvenc hevc codec but i get  Decklink input buffer overrun! always. I have
tested outputting to -f null /dev/null but i get the same
I tried with the -thread_queue_size option too without luck.
My 2 pci ports are 16X each on a 32 lines pci express 3.0 mother board. 

My test command :

ffmpeg -thread_queue_size 5096 -f decklink -r 3/1001 -rtbufsize 200M -i
'SDI1' -vsync 1 -c:a aac -b:a 128k -c:v hevc_nvenc -b:v 50M -preset fast
-profile main -level auto -f null /dev/null

Any ideas on how to troubleshoot this ?



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