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Bug 755665 - Add support for rolling headers and clock update in the teletext decoder
Add support for rolling headers and clock update in the teletext decoder
Status: RESOLVED OBSOLETE
Product: GStreamer
Classification: Platform
Component: gst-plugins-bad
git master
Other Linux
: Normal enhancement
: git master
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on: 733819
Blocks:
 
 
Reported: 2015-09-26 13:55 UTC by Daniel Kamil Kozar
Modified: 2018-11-03 13:40 UTC
See Also:
GNOME target: ---
GNOME version: ---


Attachments
Add support for rolling headers and clock updates in teletextdec (12.00 KB, patch)
2015-09-26 13:55 UTC, Daniel Kamil Kozar
none Details | Review

Description Daniel Kamil Kozar 2015-09-26 13:55:40 UTC
Created attachment 312204 [details] [review]
Add support for rolling headers and clock updates in teletextdec

This patch adds support for rolling headers and clock updates in the teletext decoder's RGBA output mode. Thus, the behaviour is now quite similar to what can be seen with analogue TVs :

 * Right after turning on the decoder, only the rolling header is displayed, while the page content is blank.
 * After finding the page, only the clock is updated.
 * When changing the requested page, the content of the old page is still displayed, but the header shows rolling page numbers.

The patch requires applying the patch porting the teletextdec element to 1.0, which I posted previously.
Comment 1 Thomas Löwe 2015-09-28 08:13:03 UTC
Hi Daniel,

thanks for splitting this from the port.

It's better than the first approach, but I see still 2 problems:

1) it doesn't realize already cached pages and waits for a page update instead of showing the cached page immediately

2) header colors still changes (pages with different teletext levels), maybe always use the color from the index page?

The ev.ttx_page.clock_update looks not reliable here: the clock jumps here over several seconds.
Comment 2 GStreamer system administrator 2018-11-03 13:40:49 UTC
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