BMRAW SDK, extremely slow to process 1st frame

Ask software engineering and SDK questions for developers working on Mac OS X, Windows or Linux.
  • Author
  • Message
Offline

hans.lehmann

  • Posts: 2
  • Joined: Tue Jan 08, 2019 11:18 pm
  • Real Name: Hans Lehmann

BMRAW SDK, extremely slow to process 1st frame

PostTue Jan 08, 2019 11:28 pm

Using the CUDA example in version 1.1 of the Black Magic RAW SDK, the delay between the ReadComplete callback and ProcessComplete is at 10-15 seconds the first time a frame is decoded. Every frame after that seems to run easily in real time. Is this normal behavior? That's a huge delay for a user trying to deal with many clips.

This is on Windows 7, with a GTX1080i and CUDA 8.0
Offline

Cameron Nichols

Blackmagic Design

  • Posts: 442
  • Joined: Mon Sep 04, 2017 4:05 am

Re: BMRAW SDK, extremely slow to process 1st frame

PostFri Jan 11, 2019 3:59 am

Hi Hans,

Yes there will be some delay as the GPU decoder is dynamically loaded. This will nominally be a few seconds, but I wouldn't expect 10-15 seconds.

If multiple clips share the same IBlackmagicRaw interface, then the delay will only occur when reading the first clip.

Regards
Cameron

Return to Software Developers

Who is online

Users browsing this forum: No registered users and 17 guests