According TDA4VM features page, the encoder should be able to handle 3 1920x1080p streams. However, in the SDK 8.4's multi_cam_codec application's documentation here:
The J721E has an expected output of 2x1080p 20fps due to limitations of the hardware/driver.
We have created an OpenVX application that can encode up to 6 1280x800 NV12 camera inputs. When the number of cameras is 6, we get an fps around 14. After testing the multi_cam_codec app, we are getting the expected 2x1080p 20fps.
The performance of our application seems to be expected when compared to the performance of the multi_cam_codec application when based on the number of bytes being encoded per second. The main difference is our application uses the direct V4L2 API, while the demo app uses GStreamer. The performance of both applications were compared with display off (and decode off for the multi_cam_codec).
We would like to confirm whether or not our application is actually getting the expected performance from the hardware/driver. Also, can we expect further encoding improvements in future releases? If so, what performance improvements are expected?
