nvJPEG scaled decoding like IJLs IJL_JFILE_READONEEIGHTH

Gaming and Visualization Technologies Video Processing & Optical Flow
1

does nvJPEG support scaled decoding, like IJL with IJL_JFILE_READONEEIGHTH?

In my application case, I would only need 1/64 of the GPU memory if this option were available

2

Hi lc640, Thanks for your query. nvJPEG currently does not support scaled decoding.
We will evaluate this feature for future releases.

3

Hi Mandar,

this would be great.

The effort to work with a lot of jpeg-thumbs on the GPU is very high at the moment,
I can only decode the JPeg in full size, then it has to be scaled down, the memory of the Jpeg frame must be released immediately to keep a large number of Thumbs in the GPU memory. Scaled decoding would be very helpful - it saves memory bandwidth and GPU usage.

This procedure has already proven itself on the CPU

Scaled decoding is on one of the features i’m missing in H264 / H265 etc as well.

Working on big Streams (4K 8K) is very expensive regarding GPU-Memory. (I’m missing this feature in Intel Media SDK, too)

4

NVDEC supports immediately scaling H.264 for you. Set ulTargetWidth and ulTargetHeight in CUVIDDECODECREATEINFO when you create the decoder.