I am trying to write a small program in C++ that transcodes a video frame by frame, and I am using the functions libvlc_video_set_callbacks and libvlc_video_set_format_callbacks to achieve this.
The first function works fine, but I am not sure how to implement libvlc_video_set_format_callbacks.
I tried it this way to start with but it gives me an argument error for 'setup':
int setup(void* pUserData, char *chroma, unsigned int *width, unsigned int *height, unsigned int *pitches, unsigned int *lines)
{
(void) pUserData;
return 1;
}
libvlc_video_set_format_callbacks(mp, setup, cleanup);
Next thing is that I don't really know how to set the right video format properties.
Can you please help me with this setup-function or at least point me to an example that shows how to implement it, as I didn't find one? As you can imagine, I am not a very experienced programmer so please be patient with me ;) Thanks in advance
liblv_video_set_format_callbacks
second argument is of type libvlc_video_format_cb
, which is the following typedef:
typedef unsigned(* libvlc_video_format_cb)(void **opaque, char *chroma, unsigned *width, unsigned *height, unsigned *pitches, unsigned *lines);
We can see two differences with your setup
function:
void**
. Yours is void*
. unsigned
. Yours is int
. I don't know either about video format properties. Thus, I will not able to give you any pointers for that.
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