imagenet-camera gets reverse orientation image on TX2 with TR2.1

dusty_nv · May 26, 2020, 6:43pm

Hi @dangerduncan, it should be gstCamera.cpp line 416:

dusty-nv/jetson-utils/blob/798c416c175d509571859c9290257bd5cce1fd63/camera/gstCamera.cpp#L416


      
          	// #define CAPS_STR "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)I420, framerate=(fraction)30/1"

          	std::ostringstream ss;

          

          	if( csiCamera() && src != GST_SOURCE_V4L2 )

          	{

          		mSource = src;	 // store camera source method

          

          	#if NV_TENSORRT_MAJOR > 1 && NV_TENSORRT_MAJOR < 5	// if JetPack 3.1-3.3 (different flip-method)

          		const int flipMethod = 0;					// Xavier (w/TRT5) camera is mounted inverted

          	#else

          		const int flipMethod = 2;

          	#endif	

          

          		if( src == GST_SOURCE_NVCAMERA )

          			ss << "nvcamerasrc fpsRange=\"30.0 30.0\" ! video/x-raw(memory:NVMM), width=(int)" << mWidth << ", height=(int)" << mHeight << ", format=(string)NV12 ! nvvidconv flip-method=" << flipMethod << " ! "; //'video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)I420, framerate=(fraction)30/1' ! ";

          		else if( src == GST_SOURCE_NVARGUS )

          			ss << "nvarguscamerasrc sensor-id=" << mSensorCSI << " ! video/x-raw(memory:NVMM), width=(int)" << mWidth << ", height=(int)" << mHeight << ", framerate=30/1, format=(string)NV12 ! nvvidconv flip-method=" << flipMethod << " ! ";

          		

          		ss << "video/x-raw ! appsink name=mysink";

          	}

          	else

You can find the file in your local source tree under jetson-inference/utils/camera/gstCamera.cpp.

Change flip-method=2 to flip-method=0 on line 416, then save the file, and run these commands to re-compile:

$ cd jetson-inference/build
$ make
$ sudo make install

Then when you run the app again, it shouldn’t be flipped anymore. Sorry for the trouble, in a future update I plan to expose flip-method as a parameter that you can easily change (i.e. from the command line or program).

windsorinca · May 27, 2020, 8:33pm

THANK YOU this worked for me!

dangerduncan · June 2, 2020, 12:25am

Thanks Dusty_nv, been so busy with work haven’t tried this yet, but I will soon. Appreciate the help. Thank you.

dangerduncan · June 6, 2020, 3:18pm

dusty_nv,

want to say thanks so much. it worked!!! had no clue what a cpp file is or how to edit them :) so that was fun. ended up using vi … so i could actually naviagate/edit/save… as when trying simple edit gstCamera.cpp it put me in a strange editor that I was not good at navigating.

having a blast and learning. now i can finish Hello World AI thanks!