Re: [Mjpeg-users] jpeg2yuv: Corrupt JPEG data: premature end of data segment

[Gert V. <ger...@hc...>]

Hi,

While looking through the jpeg2yuv source code, I noticed that the file 
size of the jpeg images is obtained by reading MAXPIXELS bytes from the 
jpeg file:

         jpegsize = fread(jpegdata, sizeof(unsigned char), MAXPIXELS, 
jpegfile);

And MAXPIXELS is defined as 1280x1024 pixels:

      #define MAXPIXELS (1280*1024)  /* Maximum size of final image */

Which is 1310720 bytes and is not big enough for the jpegs I was trying 
to convert.

A quick and dirty solution for me:

[gert@apollo lavtools]$ diff -u jpeg2yuv.c.1 jpeg2yuv.c
--- jpeg2yuv.c.1        2006-05-27 12:31:56.000000000 +0200
+++ jpeg2yuv.c  2006-05-27 12:32:26.000000000 +0200
@@ -42,7 +42,7 @@
 #include "yuv4mpeg.h"
 #include "mpegconsts.h"

-#define MAXPIXELS (1280*1024)  /* Maximum size of final image */
+#define MAXPIXELS (3000*2200)  /* Maximum size of final image */



[gert@apollo lavtools]$


   Gert




Gert Vervoort wrote:

>
> jpeg2yuv mentions that the size of the image is 1310720 bytes, but the 
> actual size is 1839353 bytes:
> [gert@apollo tmp]$ ls -al IMG_0134.JPG
> -rw-rw-r--  1 gert gert 1839353 May 26 21:50 IMG_0134.JPG
> [gert@apollo tmp]$
>