Hi,
whenever i am trying to read out the avi file and converting into grayscal
using Opencv 2.1 and VS 2008 in windows xp
i don't why i am getting following run time error at the same time i am
unable to get the help on it
**ERROR 1**
[NULL @ 0x37da10]Invalid and
inefficient vfw-avi packed B frames
detected fps=23 frame (w, h) = (640,
272) Output #0, avi, to 'test.avi':
Stream #0.0: Video: mpeg4, yuv420p,
640x272, q=2-31, 11141 kb/s, 90k tbn,
23 .98 tbc [mpeg4 @ 0x37f920]removing
common factors from framerate [mpeg4 @
0x37da10]Invalid and inefficient
vfw-avi packed B frames detected
Compiler did not align stack
variables. Libavcodec has been
miscompiled and may be very slow or
crash. This is not a bug in
libavcodec, but in the compiler. You
may try recompiling using gcc >= 4.2.
Do not report crashes to FFmpeg
developers. [mpeg4 @ 0x37da10]Invalid
and inefficient vfw-avi packed B
frames detected
if i try some other avi file then i am getting following runtime error
**ERROR 2**
fps=15 frame (w, h) = (176, 184)
Output #0, avi, to 'demo.avi':
Stream #0.0: Video: mpeg4, yuv420p, 176x184, q=2-31, 2072 kb/s,
90k tbn, 15 tbc Compiler did not align
stack variables. Libavcodec has been
miscompiled and may be very slow or
crash. This is not a bug in
libavcodec, but in the compiler. You
may try recompiling using gcc >= 4.2.
Do not report crashes to FFmpeg
developers.
I really don't know whats going on here is my code from Learning OpenCV ,
// VideoCon.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include <cv.h>
#include <highgui.h>
#include <stdio.h>
int main( int argc, char* argv[] ) {
cvNamedWindow( "Example2_10", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "Log_Polar", CV_WINDOW_AUTOSIZE );
CvCapture* capture = cvCreateFileCapture( "Rambo.avi" );
if (!capture){
return -1;
}
IplImage* bgr_frame;
double fps = cvGetCaptureProperty (
capture,
CV_CAP_PROP_FPS
);
printf("fps=%d\n",(int)fps);
CvSize size = cvSize(
(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH),
(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT)
);
printf("frame (w, h) = (%d, %d)\n",size.width,size.height);
#ifndef NOWRITE
CvVideoWriter* writer = cvCreateVideoWriter(
// On linux Will only work if you've installed ffmpeg development
files correctly,
"test.avi",
// otherwise segmentation fault. Windows probably better.
CV_FOURCC('D','X','5','0'),
fps,
size
);
#endif
IplImage* logpolar_frame = cvCreateImage(
size,
IPL_DEPTH_8U,
3
);
IplImage* gray_frame = cvCreateImage(
size,
IPL_DEPTH_8U,
1
);
while( (bgr_frame=cvQueryFrame(capture)) != NULL ) {
cvShowImage( "Example2_10", bgr_frame );
cvConvertImage( //We never make use of this gray image
bgr_frame,
gray_frame,
CV_RGB2GRAY
);
cvLogPolar( bgr_frame, logpolar_frame,
//This is just a fun conversion the mimic's the human visual
system
cvPoint2D32f(bgr_frame->width/2,
bgr_frame->height/2),
40,
CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS );
cvShowImage( "Log_Polar", logpolar_frame );
//Sigh, on linux, depending on your ffmpeg, this often won't
work ...
#ifndef NOWRITE
cvWriteToAVI( writer, logpolar_frame );
#endif
char c = cvWaitKey(10);
if( c == 27 ) break;
}
#ifndef NOWRITE
cvReleaseVideoWriter( &writer );
#endif
cvReleaseImage( &gray_frame );
cvReleaseImage( &logpolar_frame );
cvReleaseCapture( &capture );
}
--
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