[aravis] Re: ArvBuffer = NULL, grab failed ...
- From: Yoan Audureau <yoan.audureau@xxxxxxxxx>
- To: aravis@xxxxxxxxxxxxx
- Date: Thu, 22 Jan 2015 23:45:33 +0100
Hello,
I have resolved my problem. it was just a little mistake...
When my ArvBuffer was not succeed to grab a frame (no
ARV_BUFFER_STATUS_SUCCESS), I returned false in my function without re-push
the buffer in the stream. After a while, there were no more available
buffers in the stream and that's why I got an ArvBuffer with NULL value.
Now it works well, thanks aravis !
Y.A
2015-01-22 14:39 GMT+01:00 Yoan Audureau <yoan.audureau@xxxxxxxxx>:
> 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
>
--
Audureau Yoan
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