[aravis] Re: ArvBuffer = NULL, grab failed ...
- From: Yoan Audureau <yoan.audureau@xxxxxxxxx>
- To: aravis@xxxxxxxxxxxxx
- Date: Thu, 22 Jan 2015 14:39:32 +0100
Hello,
Yes I have used the aravis examples and it worked very well until
yesterday^^.
I work on a distant linux pc which is connected to a basler camera and dmk
camera (DMK23G445). This pc runs my program. Arv-viewer works well with the
DMK camera, but i'm not sure for the basler camera ( I get arv-viewer's
windows from a distant pc). I have not lot informations with arv-viewer to
see if a grab failed but i think it failed because I can't get new frames
if I play with exposure or gain (with the dmk, it works).
With my program, the continuous grab seems to works with dmk. My arv-buffer
doesn't get a null value. But with the basler, my arv-buffer get a NULL
value after 1000 or 2000 frames, it depends. Is that merely a connection
problem ? Both cameras are connected to a gigabit switch.
Thank you,
Y.A
2015-01-22 12:35 GMT+01:00 Patrick Doyle <wpdster@xxxxxxxxx>:
> This looks a lot like code from the Aravis examples and/or viewer
> directories, which is great! I wish I had thought to look at that
> code when I first started playing with Aravis.
>
> Does your camera work with arvviewer? Or does it eventually timeout
> and fail as you describe even with the viewer?
>
> --wpd
>
>
> On Wed, Jan 21, 2015 at 2:33 PM, Yoan Audureau <yoan.audureau@xxxxxxxxx>
> wrote:
> >
> > Hello,
> >
> > I am a new user of aravis for a basler camera acA1300-30gm.
> > I have some difficulties to grab frames continuously from this camera.
> > In fact, it works to grab frames but at a moment my ArvBuffer get a NULL
> > value (arv_buffer = arv_stream_timeout_pop_buffer(stream, 2000000)). And
> > after that, the following grabs also all failed. I don't really
> understand
> > why arv_stream_timeout_pop_buffer returns a NULL value at "random" time.
> > Could anyone help me find my mistake ?
> >
> > Here is the code grouped in different functions. ArvBuffer is in
> > CameraSDKAravis::grabImage(Frame &newFrame).
> > I call this function in a loop.
> >
> > Thank you,
> >
> > Yoan
> >
> > bool CameraSDKAravis::grabStart(){
> >
> > payload = arv_camera_get_payload (camera);
> >
> > arv_camera_get_region (camera, NULL, NULL, &width, &height);
> >
> > pixFormat = arv_camera_get_pixel_format (camera);
> >
> > arv_camera_get_exposure_time_bounds (camera, &exposureMin,
> > &exposureMax);
> >
> > arv_camera_get_gain_bounds (camera, &gainMin, &gainMax);
> >
> > arv_camera_set_frame_rate (camera, 30);
> >
> > fps = arv_camera_get_frame_rate(camera);
> >
> > caps_string = arv_pixel_format_to_gst_caps_string(pixFormat);
> >
> > gain = arv_camera_get_gain(camera);
> > exp = arv_camera_get_exposure_time(camera);
> >
> > cout << endl;
> >
> > cout << "DEVICE SELECTED : " << arv_camera_get_device_id(camera)
> <<
> > endl;
> > cout << "DEVICE NAME : " << arv_camera_get_model_name(camera)
> <<
> > endl;
> > cout << "DEVICE VENDOR : " << arv_camera_get_vendor_name(camera)
> <<
> > endl;
> > cout << "PAYLOAD : " << payload
> <<
> > endl;
> > cout << "Width : " << width
> <<
> > endl
> > << "Height : " << height
> <<
> > endl;
> > cout << "Exp Range : [" << exposureMin << " - " <<
> exposureMax
> > << "]" << endl;
> > cout << "Exp : " << exp
> <<
> > endl;
> > cout << "Gain Range : [" << gainMin << " - " << gainMax
> > << "]" << endl;
> > cout << "Gain : " << gain
> <<
> > endl;
> > cout << "Fps : " << fps
> <<
> > endl;
> > cout << "Type : " << caps_string
> <<
> > endl;
> >
> > cout << endl;
> >
> > // Create a new stream object. Open stream on Camera.
> > stream = arv_camera_create_stream(camera, NULL, NULL);
> >
> > if (ARV_IS_GV_STREAM(stream)){
> >
> > bool arv_option_auto_socket_buffer = true;
> > bool arv_option_no_packet_resend = true;
> > unsigned int arv_option_packet_timeout = 20;
> > unsigned int arv_option_frame_retention = 100;
> >
> > if(arv_option_auto_socket_buffer){
> >
> > g_object_set(stream,
> > "socket-buffer",
> ARV_GV_STREAM_SOCKET_BUFFER_AUTO,
> > "socket-buffer-size", 0, NULL);
> >
> > }
> >
> > if(arv_option_no_packet_resend){
> >
> > g_object_set(stream, "packet-resend",
> > ARV_GV_STREAM_PACKET_RESEND_NEVER, NULL);
> >
> > }
> >
> > g_object_set(stream, "packet-timeout", (unsigned)200000,
> > "frame-retention", (unsigned) 10000000,NULL);
> >
> > }
> >
> > // Push 50 buffer in the stream input buffer queue.
> > for (int i = 0; i < 50; i++)
> > arv_stream_push_buffer(stream, arv_buffer_new(payload, NULL));
> >
> > return true;
> >
> > }
> >
> > void CameraSDKAravis::acqStart(bool continuousAcquisition){
> >
> > if(continuousAcquisition)
> > arv_camera_set_acquisition_mode(camera,
> > ARV_ACQUISITION_MODE_CONTINUOUS);
> > else
> > arv_camera_set_acquisition_mode(camera,
> > ARV_ACQUISITION_MODE_SINGLE_FRAME);
> >
> > arv_camera_start_acquisition(camera);
> >
> > }
> >
> > void CameraSDKAravis::acqStop(){
> >
> > arv_stream_get_statistics(stream, &n_completed_buffers, &n_failures,
> > &n_underruns);
> >
> > cout << "Completed buffers = " << (unsigned long long)
> > n_completed_buffers << endl;
> > cout << "Failures = " << (unsigned long long) n_failures
> > << endl;
> > cout << "Underruns = " << (unsigned long long) n_underruns
> > << endl;
> >
> > arv_camera_stop_acquisition(camera);
> >
> > g_object_unref(stream);
> > g_object_unref(camera);
> >
> > }
> >
> > bool CameraSDKAravis::grabImage(Frame &newFrame){
> >
> > ArvBuffer *arv_buffer;
> >
> > arv_buffer = arv_stream_timeout_pop_buffer(stream, 2000000); //us
> >
> > if (arv_buffer == NULL){
> > g_usleep (100000);
> > // throw runtime_error("arv_buffer is NULL");
> > return false;
> >
> > }else{
> >
> > if (arv_buffer->status == ARV_BUFFER_STATUS_SUCCESS){
> >
> > //Timestamping.
> > string acquisitionDate =
> >
> TimeDate::localDateTime(second_clock::universal_time(),"%Y:%m:%d:%H:%M:%S");
> >
> > Mat image;
> >
> > if(pixFormat == ARV_PIXEL_FORMAT_MONO_8){
> >
> > Mat img(height, width, CV_8UC1, arv_buffer->data);
> > img.copyTo(image);
> >
> > }else if(pixFormat == ARV_PIXEL_FORMAT_MONO_12){
> >
> > Mat img(height, width, CV_16UC1, arv_buffer->data);
> > img.copyTo(image);
> >
> > }
> >
> > newFrame = Frame(image, arv_camera_get_gain(camera),
> > arv_camera_get_exposure_time(camera), acquisitionDate);
> >
> > }else{
> >
> > switch(arv_buffer->status){
> >
> > case 0 :
> > cout << "ARV_BUFFER_STATUS_SUCCESS : the buffer
> contains
> > a valid image"<<endl;
> > break;
> > case 1 :
> > cout << "ARV_BUFFER_STATUS_CLEARED: the buffer is
> > cleared"<<endl;
> > break;
> > case 2 :
> > cout << "ARV_BUFFER_STATUS_TIMEOUT: timeout was
> reached
> > before all packets are received"<<endl;
> > break;
> > case 3 :
> > cout << "ARV_BUFFER_STATUS_MISSING_PACKETS: stream
> has
> > missing packets"<<endl;
> > break;
> > case 4 :
> > cout << "ARV_BUFFER_STATUS_WRONG_PACKET_ID: stream
> has
> > packet with wrong id"<<endl;
> > break;
> > case 5 :
> > cout << "ARV_BUFFER_STATUS_SIZE_MISMATCH: the
> received
> > image didn't fit in the buffer data space"<<endl;
> > break;
> > case 6 :
> > cout << "ARV_BUFFER_STATUS_FILLING: the image is
> > currently being filled"<<endl;
> > break;
> > case 7 :
> > cout << "ARV_BUFFER_STATUS_ABORTED: the filling was
> > aborted before completion"<<endl;
> > break;
> >
> > }
> >
> > return false;
> > }
> >
> > arv_stream_push_buffer(stream, arv_buffer);
> >
> > }
> >
> > return true;
> > }
> >
>
>
--
Audureau Yoan
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