Hi,
I'm trying to grab images from a webcam, and I'm trying to use the
following code:
AVCodecContext *pCodecCtx;
AVInputFormat *pFormat;
const char device[] = "/dev/video0";
const char formatName[] = "video4linux";
av_register_all();
if (!(pFormat = av_find_input_format(formatName))) {
printf("can't find input format %s\n", formatName);
return -1;
}
if (av_open_input_file(&pFormatCtx, device, pFormat, 0, NULL)!=0) {
printf("can't find open input file %s\n", device);
return -1;
}
but I'm finding that I always get a null as a return value from
av_find_input_format(). I tried all sort os values for formatName,
ranging from mp2, mp4, dv1394, h264, video4linux and video4linux2. all
these values are listed when I issue:
ffmpeg -formats
it seems that on my setup, av_find_input_format() just doesn't find any
of the formats. what am I doing wrong?
Akos
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