The line stride declared by the NDI video frame is ignored which causes issues for non standard resolutions

[guillaumeriousat]

For video receivers, cyndilib recomputes the line-stride in the calc_fourcc_pack_info function instead of using the line-stride declared in the NDIlib_video_frame_v2_t struct.

For most resolution this works fine but some non-standard resolution add some line padding.

In practice, this causes cyndilib to consider that the data buffer is actually shorter than it really is. The get_array function of a video frame returns incomplete data and trying to display it results in a jumbled image.

Here is a screenshot of OBS sending three color bands as a 300x700 rgba image through the OBS-NDI plugin and cyndilib receiving it.

This also happens with the RecvColorFormat.UYVY_RGBA flag, which can also contain padding which cyndilb ignores.

I have a simple fix for this for which I'll open a PR soon.