Comments by Member 13740197 (Top 36 by date)

Thanks for the answer.

Hi,

Thanks for the answer. I have tried with your code but I am unable to play GIFs.Below is the play function. I am printing i value, it is printing continuously 0 and 1 but the gif is not playing. Can you please tell me how to solve this.

void play(char *gif)
{

movie = new QMovie(gif);
if (!movie->isValid())
{
qDebug()<<"Movie is Inavlid";
}
ui->label_banner->setMovie(movie);

movie->start();
ui->stackedWidget->setCurrentIndex(4);
}

Thanks for the answer

I have already sent the output to a file /root/response.json. But this file is empty when curl error is 6 and 28 case. But my requirement is to read this error numbers.

Hi, I have another problem after playing and stopping video. After 10 times while I am playing video I got below error, Can you please tell why this is coming?

[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...
[AO OSS] Can't set audio device /dev/dsp to s16le output, trying s16le...


MPlayer interrupted by signal 2 in module: ao2_init
Can't restore text mode: Invalid argument

Thanks for your answer

This explaining how to save the image but my requirement is how to convert qlistwidgetitem to QImage.

My code
public:
static Widget * Get(){return w_pThis;}

protected:
static Widget * w_pThis;

After using this I am getting below error

error: undefined reference to `Widget::m_pThis'

Can you please tell me how to solve this.

Can you please explain with an example.

Hi
After using pointers also I am unable to access ui. Below is which I have used.

Widget *obj;
obj->Display_image();

also tried below

Widget *obj = new Widget();
obj->Display_image();

Can you please provide me the solution.

The below is some part of the code which is used in the library.

m_capStartAct = new QAction(QIcon(":/images/record.png"), "&Start capturing", this);
QAction *quitAct = new QAction(QIcon(":/images/exit.png"), "&Quit", this);
QToolBar *toolBar = addToolBar("");
toolBar->setObjectName("toolBar");
toolBar->addAction(m_capStartAct);
toolBar->addAction(quitAct);

Here the images record.png & exit.png are present in resource file rsc.qrc.

But when I am using this library in another application the images are not displaying(means empty button) and function is working fine. I have added these images to my application as a resource file but still, images are not displaying. Can you please help me.

Thanks for the reply, now I am able to run my application. But I got another issue. My library contains GUI which uses resource file for images.
And I have added this resource file in my application also, but when I am running my application these images are not displaying. So how to make it possible to display, Can you please help.

Hi
I got a solution for this. I have created a library project with qt using New project->OtherProject->C++ Library. After building the project four shared libraries are created in the project folder like abc.s0, abc.so.1, abc.so.1.0 and abc.so.1.0.0.

I used this libraries in another project which is successfully run. After running that exe in target I got error below

./mycam: error while loading shared libraries: abc.so.1: cannot open shared object file: No such file or directory

What is this error and how to resolve it, Can you please help.

Actually the object files I have taken from qt project folder after building.

I have tried with object files like below
gcc -shared -o libc.so camcapture.o capture-win.o ctrl-tab.o designer.o general-tab.o glMsgDialog.o json.o main.o qrc_rsc.o qv4l2.o v4l2-api.o

But I am getting below error

/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
/usr/bin/ld: camcapture.o: Relocations in generic ELF (EM: 40)
camcapture.o: error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status


What is this error and do I need to do anything to do with ld command and object files.

Thanks for the reply.
The link which you have sent is giving an explanation about creating a library using .c files. But in my case, the whole qt project(which consists of default classes and functions because of this I could not convert into .cpp files) should convert into a library.

Sorry for not mentioning,USB means Pendrive.I need to know whether Pendrive is connected or not using if condition.

It asking for arguments
lsusb -s [[bus]:][devnum]
lsusb -d vendor:[product]

what I have to give here.My requirement is only to check whether USB is connected or not.If connected it has to copy file otherwise it has to display a message to user to connect USB.

Path I have taken correctly.Is there any way to assign hexadecimal values to visb_bmp char array(as shown above).

The code you given is not printing anything

The code is working fine if I take visb_bmp value taken llike below.
So how to convert image to this hexadecimal bytes and save to visb_bmp
unsigned char visb_bmp[]=
{

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x87,0xfd,0xe0,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x3f,0xe0,0xff,0x81,0xff,0x87,0x7f,0x80,0x7f,0x30, //*16bytes*

0xf8,0x1f,0xfc,0xf,0xf2,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x87,0xfc,0xc0,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x3f,0xe0,0x7f,0x0,0xfe,0x87,0x1f,0x0,0x7c,0x70, //*16bytes*

0xf0,0x1f,0xfc,0xf,0xf9,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x3,0xfe,0x81,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x1f,0xe0,0x1f,0x4,0xfc,0x87,0xf,0x0,0x78,0x70, //*16bytes*

0xf0,0x1f,0xfc,0x7,0xf9,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x41,0xfe,0x83,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x1f,0xe0,0xf,0x66,0xf8,0x87,0xf,0x0,0x78,0x70, //*16bytes*

0xf0,0xf,0xfe,0x87,0xfc,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x21,0xff,0x3,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0xf,0xe0,0xcf,0x64,0xf0,0x87,0x7,0x0,0x78,0x70, //*16bytes*

0xf0,0xf,0xfe,0x3,0xfc,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x20,0xff,0x7,0x1e, //*16bytes*

0xfc,0xff,0xf0,0x1f,0xfe,0x83,0xf,0xe0,0xc7,0x0,0xe3,0x87,0x7,0x7f,0x70,0xf0, //*16bytes*

0xe0,0xf,0xfe,0x43,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x90,0xff,0xf,0x1e, //*1
};

The code is working fine if I take visb_bmp value taken llike below.
So how to convert image to this hexadecimal bytes and save to visb_bmp
unsigned char visb_bmp[]=
{

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x87,0xfd,0xe0,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x3f,0xe0,0xff,0x81,0xff,0x87,0x7f,0x80,0x7f,0x30, //*16bytes*

0xf8,0x1f,0xfc,0xf,0xf2,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x87,0xfc,0xc0,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x3f,0xe0,0x7f,0x0,0xfe,0x87,0x1f,0x0,0x7c,0x70, //*16bytes*

0xf0,0x1f,0xfc,0xf,0xf9,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x3,0xfe,0x81,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x1f,0xe0,0x1f,0x4,0xfc,0x87,0xf,0x0,0x78,0x70, //*16bytes*

0xf0,0x1f,0xfc,0x7,0xf9,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x41,0xfe,0x83,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0x1f,0xe0,0xf,0x66,0xf8,0x87,0xf,0x0,0x78,0x70, //*16bytes*

0xf0,0xf,0xfe,0x87,0xfc,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x21,0xff,0x3,0x1f, //*16bytes*

0x3c,0x0,0x70,0x0,0x80,0x83,0xf,0xe0,0xcf,0x64,0xf0,0x87,0x7,0x0,0x78,0x70, //*16bytes*

0xf0,0xf,0xfe,0x3,0xfc,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x20,0xff,0x7,0x1e, //*16bytes*

0xfc,0xff,0xf0,0x1f,0xfe,0x83,0xf,0xe0,0xc7,0x0,0xe3,0x87,0x7,0x7f,0x70,0xf0, //*16bytes*

0xe0,0xf,0xfe,0x43,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, //*16bytes*

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x90,0xff,0xf,0x1e, //*1

I tried below,but if usb not connected also it is entering into if condition.Tell me why?

ret = system("lsusb -v");
if (ret == 0)
pop_up("Connected you USB drive...");
else
{
pop_up("USB Drive Not Connected..");
return;
}

This is not working.In query executing it is entering but not entering into
while(query.next).Can you please tell me the solution.

Sorry Iam unable to understand this,Can you please provide me any video on how to scroll a screen.

I have taken vertical layout on Scroll area.But I had problem that when taking any object I am unable to resize width and height.Especially when taking label it is coming with maximum width & height equal to scroll area.But my requirement is to place a label beside another label.Can you please provide me the solution.

Sorry I am unable to find the QVBoxLayout in QT GUI,Can you please tell me how to take

Thank you

I have know idea on sqlite,so which datatype we have to take to save QDatetime object in db.And how to retrieve the object.Means can I take directly object as qry.value(0)

Thank you somuch for your answer

It's working fine,but I had a problem when I am updating a parameter in the same row.

query.prepare("UPDATE ISSUEPASS SET INTIME =? WHERE PassID = :passId");
query.addBindValue(intime);
query.bindValue(":passId", num);
Here intime is QString variable,but Iam getting Sql error "Parameter Count mismatch"
Can you please tell me the solution.