[Libav-user] Question about avdevice_list_devices() using.

[Roger Pack]

AFAIK it's not "tied in" to dshow as of yet, is this a really big priority?

On Wed, Aug 20, 2014 at 8:16 AM, Mike Charikov <ch_mike at mail.ru> wrote:
>
> Hi!
>
>
>
> I try to use avdevice_list_devices() for getting list of video devices, but don’t clearly understand, how to do that properly. How should I properly init AVFormatContext for calling avdevice_list_devices()?
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>
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> Tried something like that:
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>
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> int main() {
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>
>
>                 avdevice_register_all();
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>                 avcodec_register_all();
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>
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>                 AVFormatContext* format_context = avformat_alloc_context();
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>                 AVInputFormat *fmt = av_find_input_format("dshow");
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>                 AVDeviceInfoList *device_list=NULL;
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>
>
>                 int err = avformat_open_input(&format_context, NULL, fmt, NULL);
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>                 if (err != 0) {
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>                                fprintf(stderr, "ffmpeg: Unable to open input: %d\n", err);
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>                 }
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>
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>                 int i = avdevice_list_devices(format_context, &device_list);
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>
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>                 return 0;
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> }
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>
>
> But avformat_open_input() returns error (code -1414092869), and so does avdevice_list_devices() (code -40)
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>
>
>
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