Strange Bug ! [core dump] When compiling with cv::imencode , ".mkv" files decode would hit core dump

[Ithan Wu]

I found a strange bug that when I used cv::imencode in my code , I can't decode a .mkv video file!
That' so ....weired.. and it's easy to reproduce ,
Reproduce steps:
my codes

//below is my code snipt
int main( int argc, char** argv ){
	commandLine cmdLine(argc, argv);
	videoSource* input = videoSource::Create(cmdLine, ARG_POSITION(0));
	if( !input ){
		LogError("video-viewer:  failed to create input stream\n");
		return 0;
	}
	while(true){
		uchar3* image = NULL;
		int status = 0;
		
		if( !input->Capture(&image, &status) )
		{
			if( status == videoSource::TIMEOUT )
				continue;
			
			break; // EOS
		}		
		std::vector<uchar> encoded_data;
		cv::Mat frameclone = cv::Mat(720,1280,CV_8UC3,image).clone();         
                 //this line IS THE KILLER !,if comment it ,the issue disappear !
		cv::imencode(".jpg",frameclone,encoded_data);
	}
}

compile above code , and try to use it to read a ".mkv" file ,like this

./videotest ./1722548788536541184.mkv

Then the issue occur !

[gstreamer] initialized gstreamer, version 1.16.3.0
[gstreamer] gstDecoder -- creating decoder for ./1722548788536541184.mkv
Bus error (core dumped)

BUT,guess what ?
if comment the line using cv::imencdoe ,everything would become OK !Below is the output when "cv::imencode" line commented

[gstreamer] initialized gstreamer, version 1.16.3.0
[gstreamer] gstDecoder -- creating decoder for ./1722548788536541184.mkv
NvMMLiteBlockCreate : Block : BlockType = 256 
[JPEG Decode] BeginSequence Display WidthxHeight 1280x720
[JPEG Decode] NvMMLiteJPEGDecBlockPrivateClose done
[JPEG Decode] NvMMLiteJPEGDecBlockClose done
[gstreamer] gstDecoder -- discovered video resolution: 1280x720  (framerate 25.000000 Hz)
[gstreamer] gstDecoder -- discovered video caps:  image/jpeg, framerate=(fraction)25/1, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, colorimetry=(string)2:4:5:1
[gstreamer] gstDecoder -- pipeline string:
[gstreamer] filesrc location=./1722548788536541184.mkv ! matroskademux ! queue ! jpegdec name=decoder ! video/x-raw ! appsink name=mysink
[video]  created gstDecoder from file:///home/holyblade/codes/situp_jetson/situp_service/build/./1722548788536541184.mkv
------------------------------------------------
gstDecoder video options:
------------------------------------------------
  -- URI: file:///home/holyblade/codes/situp_jetson/situp_service/build/./1722548788536541184.mkv
     - protocol:  file
     - location:  ./1722548788536541184.mkv
     - extension: mkv
  -- deviceType: file
  -- ioType:     input
  -- codec:      MJPEG
  -- codecType:  cpu
  -- width:      1280
  -- height:     720
  -- frameRate:  25
  -- numBuffers: 4
  -- zeroCopy:   true
  -- flipMethod: none
  -- loop:       0
------------------------------------------------
[gstreamer] opening gstDecoder for streaming, transitioning pipeline to GST_STATE_PLAYING
[gstreamer] gstreamer changed state from NULL to READY ==> mysink
[gstreamer] gstreamer changed state from NULL to READY ==> capsfilter0
[gstreamer] gstreamer changed state from NULL to READY ==> decoder
[gstreamer] gstreamer changed state from NULL to READY ==> queue0
[gstreamer] gstreamer changed state from NULL to READY ==> matroskademux1
[gstreamer] gstreamer changed state from NULL to READY ==> filesrc0
[gstreamer] gstreamer changed state from NULL to READY ==> pipeline0
[gstreamer] gstreamer changed state from READY to PAUSED ==> capsfilter0
[gstreamer] gstreamer changed state from READY to PAUSED ==> decoder
[gstreamer] gstreamer stream status CREATE ==> src
[gstreamer] gstreamer changed state from READY to PAUSED ==> queue0
[gstreamer] gstreamer stream status ENTER ==> src
[gstreamer] gstreamer stream status CREATE ==> sink
[gstreamer] gstreamer changed state from READY to PAUSED ==> matroskademux1
[gstreamer] gstreamer changed state from READY to PAUSED ==> filesrc0
[gstreamer] gstreamer stream status ENTER ==> sink
[gstreamer] gstDecoder -- onPreroll()
[gstreamer] gstreamer message stream-start ==> pipeline0
[gstreamer] gstreamer mysink taglist, container-format=(string)Matroska;
[gstreamer] gstreamer mysink taglist, video-codec=(string)"Motion\ JPEG";
[gstreamer] gstBufferManager -- map buffer size was less than max size (1382400 vs 1382407)
[gstreamer] gstBufferManager recieve caps:  video/x-raw, format=(string)I420, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)1:4:0:0, framerate=(fraction)25/1
[gstreamer] gstBufferManager -- recieved first frame, codec=MJPEG format=i420 width=1280 height=720 size=1382407
[gstreamer] gstreamer changed state from READY to PAUSED ==> mysink
[gstreamer] gstreamer changed state from READY to PAUSED ==> pipeline0
[gstreamer] gstreamer message async-done ==> pipeline0
[gstreamer] gstreamer message new-clock ==> pipeline0
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> mysink
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> capsfilter0
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> decoder
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> queue0
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> matroskademux1
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> filesrc0
[gstreamer] gstreamer changed state from PAUSED to PLAYING ==> pipeline0
[cuda]   allocated 4 ring buffers (1382407 bytes each, 5529628 bytes total)
[cuda]   allocated 4 ring buffers (8 bytes each, 32 bytes total)
[cuda]   allocated 4 ring buffers (2764800 bytes each, 11059200 bytes total)

Is there any way to solve this ?

Thank you my dude !