v4l2grab Version 0.2
A few weeks ago, I published my v4l2grab program to grab JPEGs from V4l2 devices.
Today I got an request by email to include support for integer conversion from YUV422 to RGB as descriped by Wikipedia. So I included it and did some style adjustments, too.
You can download it here: v4l2grab Version 0.2
To use integer conversion you have to compile with an additional
-DNTSC
for NTSC like conversion or
-DITU_R_INT
for ITU-R integer conversion. Both standars are explained in the referenced wikipedia article. The use of
-DITU_R_FLOAT
uses the previous floating point version of ITU-R which is default if no compiling options are specified. More information about compilation can be found on the original post.
The current version of V4L2grab can be found on github.
If you like this article, feel free to flattr it:
Jun09
2 Responses to “v4l2grab Version 0.2”
Hello,
This code is very usefull, thanks.
Just a remark, i think there is a memory leak if function “imageProcess”.
In effect, we must free dst, i.e. add at the end :
[...]
jpegWrite(dst);
free(dst) ; // This
}
[...]
In one frame this is not a problem, but in many applications we must have to treat a lot of frames, so…
Thanks a lot.
–
JM
Thanks for the hint. I fixed it in the git repository.