NvBufferComposite and NvDrmRender,one crack line appear on screen

Please apply this and give it a try:
Nvvideoconvert issue, nvvideoconvert in DS4 is better than Ds5? - #3 by DaneLLL

The steps are to run hardware converter at max clock. If you still observe the issue, we would think it is certain issue in source capturing frame data and buffers are not well synchronized. But if you feel like it is something wrong in our API, please make a patch to 13_multi_camera to demonstrate the case so that we can give it a try.