[streaming] Re: chopping off the top 24 lines of video (Vertical Blanking Interval)

[Jean-Paul Saman]

Anthony Benjammin DeNardo III wrote:
> I am VLC streaming some broadcast video on our campus, which is encoded 
> by some Hauppaugue cards.  when I view the resulting video on my VLC 
> client, the VBI is displayed as the top 24 rows, which appears as a 
> fuzzy blue line at the top of the video.  note: in analog television 
> systems the vertical blanking interval can be used to carry data, since 
> anything sent during the VBI would naturally not be displayed.
> 
> I think I could transcode the video in VLC, and crop the top 24 lines, 
> but it seems such a waste of resources since the video being received by 
> VLC is already encoded.  is there a standard way to receive video from a 
> Hauppaugue card, and strip off the VBI data (from the server) so the 
> resulting video displayed on the client does not have this fuzzy blue 
> line on top?
> 
> thanks in advance :-)
> 
I believe this is an error in encoding the analogue stream into digital 
stream. The vbi information should be carried as a separate ES in the 
digital domain.

Gtz,
Jean-Paul Saman.

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