[Libav-user] Internal error: Could not register an input HW frame

[freefalcon]

Hi,


I am writing an h264 encoder, and the video frame data is from Nvidia GPU. 


If the video frame was transferred from GPU memory to system memory, the encoder worked fine. 


But I want to encode the HW frame directly to avoid performance loss. When I called avcodec_send_frame, I got an error :


Error registering an input resource: resource register failed (23)
Could not register an input HW frame

The error was triggered by nvEncRegisterResource function.


I'd like to know what I should do if I want to use HW frame directly, expecially on how to set AVHWFramesContext. 


Is there any example about this? Now, I just referred to vaapi_encode.c  (https://www.ffmpeg.org/doxygen/4.0/vaapi_encode_8c-example.html).


Thanks for your help.
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