Video output - flash variable

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video_output flash variable

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The following information may be useful for anyone developing applications for the NMT platform.

The NMT stores the current TV Mode internally in a flash variable 'video_output'.

This appears in the /tmp/setting.txt file. And on some firmwares , is also duplicated in a file called /tmp/tvmode.

The following table list the value of /tmp/tvmode for various TV modes.

These values were observed whilst connected to a CRT TV via component. It is possible that the HDMI handshake may influence this.

Some values were observed by after pressing 'TV Mode' + digit button on the remote. Others were set using the AV Setup screen.

On Popcorn firmware the file /tmp/tvname contains the name of the TV Mode. However this is not set on all NMT firmwares.

Reported Mode	Contents of video_output (100 series)	TV Mode set via Remote (100 series)
Auto	0	0
Composite NTSC	1	1
Composite PAL	2	2
Component NTSC 480i 60Hz	3	3
Component PAL 576i 50Hz	4	?
Component 480p 60Hz	5	?
Component 720p 60hz	6	4
Component 1080p 60hz	7	6
Component 1080i 60hz	8	5
HDMI 480p 60hz	9	?
HDMI 720p 60hz	10	7
Component 1080p 24Hz	11	?
HDMI 1080i 60hz	?	?
HDMI 1080i 50hz	?	?
HDMI 1080p 60hz	?	?
HDMI 1080p 50hz	18	?
HDMI 1080p 24hz	?	?
bad mode?/bad handshake?	12	n/a
Component 720p 50hz	13	?
Component 1080p 50hz	14	?
Component 1080i 50hz	15	?
HDMI? 720p 50hz	16	?
Component 576h 50hz	30	?
HDMI 576p 50hz	31	?
?	32	8
HDMI 1080p 59,94Hz	29	9