Luca Abeni escreveu:
> Hi,
>
> Gustavo Felisberto wrote:
>
>> Using available source code I managed to do a simple video capture program:
>>
>> http://pastebin.com/m5e2840a8
>>
>> But now I'm trying to use it in a larger project. The thing is when I
>> copy/pasted it to a c++ file I started receiving a "-12" when calling
>> int result = av_open_input_file(&pFormatCtx, "/dev/video0", iformat, 0,
>> &formatParams);
>>
>
> -12 should be ENOMEM, which (I think) does not make too much sense here...
> The only issue I can see is that you risk to pass random data in
> formatParams. Try a memset() to 0 on this variable before using it.
>
>
Sorry for the delay but I've been working with other parts of the
project. If i add the memset I get problems even in the standalone program:
AVFormatParameters formatParams;
AVInputFormat *iformat;
AVFormatContext *pFormatCtx;
memset(&formatParams, 0, sizeof(AVFormatParameters));
formatParams.channel = 0;
formatParams.standard = NULL;
formatParams.width = 352;
formatParams.height = 288;
iformat = av_find_input_format("video4linux");
if (av_open_input_file(&pFormatCtx, "/dev/video0", iformat, 4096,
&formatParams) != 0) {
fprintf(stderr, "Could not open device");
return -1;
}
I start getting a return of -1 and:
[video4linux @ 0x4d170050]Bad capture size (352x288) or wrong time base (0)
Could not open device
I'me rebuilding the kernel to try the Michael Conrad tip.
--
Gustavo Felisberto
(HumpBack)
Web: http://dev.gentoo.org/~humpback
Blog: http://blog.felisberto.net/
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