Clarification on Reusing CUVID Decoder for Smaller Resolutions Without Reconfiguration

Gaming and Visualization Technologies Video Processing & Optical Flow
1

Hi NVIDIA developers,

I am working with the CUVID decoder API and have a question about reusing an already initialized decoder when handling video formats with resolutions smaller than the configured maximum resolution.

When creating the decoder, I set the maximum resolution using CUVIDDECODECREATEINFO::ulMaxWidth and CUVIDDECODECREATEINFO::ulMaxHeight. My understanding is that if the resolution of a new video format is smaller than these maximum values, it is possible to reuse the existing decoder instance without calling cuvidReconfigureDecoder().

However, I could not find explicit confirmation of this behavior in the documentation. Can someone clarify:

  1. Is it safe and efficient to reuse the decoder in this case without reconfiguration?
  2. Are there any potential issues or limitations I should be aware of when reusing the decoder for smaller resolutions?
  3. Could you point me to the specific section in the documentation or any official resources that confirm this behavior?

Thank you for your assistance!

Best regards,

Shin