Composite output

This is something I've not managed to find any details about... either with Rasplex or a xmbc-plex-plugin... 

 

Do either of the projects support composite output?
My bedroom has an old TV with no HDMI input so it has been plex-less so far... I was hoping a Pi might fix that...

 

Maybe I'm missing something obvious (maybe the Pi does composite/hdmi switching natively in the OS?) but I'm new to the pi, so perhaps I'm missing something obvious... or maybe it's just something nobody has needed so far

I would also like to know this and haven't bothered to actually look and figure it out yet

http://forums.plexapp.com/index.php/topic/62597-rasplex-support/page-3#entry366839

Video mode options

sdtv_mode defines the TV standard for composite output (default=0)

sdtv_mode=0    Normal NTSC
sdtv_mode=1    Japanese version of NTSC – no pedestal
sdtv_mode=2    Normal PAL
sdtv_mode=3    Brazilian version of PAL – 525/60 rather than 625/50, different subcarrier

sdtv_aspect defines the aspect ratio for composite output (default=1)

sdtv_aspect=1  4:3
sdtv_aspect=2  14:9
sdtv_aspect=3  16:9

I just installed using the Linux installer and although everything seems OK when starting the RaspPi I am getting no output via composite video output. I see the configuration options shown from fontie above but have no idea how to set these options on my set-up. Is there an ssh or something to get in and set configurations options? Perhaps it is another issue all together but I am getting now video out on fresh install using linux installer and composite video out.


Thanks! Jeff

I see the configuration options shown from fontie above but have no idea how to set these options on my set-up. Is there an ssh or something to get in and set configurations options?

Either use ssh (see the FAQ on how to do this) and edit /flash/config.txt or just insert the SD-Card and edit the config.txt file in the root directory of the first partition (FAT32).

I am having the same issue. I tried adding sdtv_mode=0 and aspect=0 but the same issue persists. HDMI is fine, no composite out with .28 trying .27 now

----update: same issue on .27

Added this to wiki https://sourceforge.net/p/rasplex/wiki/SD%20TV%20Output/

hey dale, thanks for posting this,

what are my next troubleshooting steps if i have set sdtv_mode=0 in the config.txt and i am still only getting hdmi out?

We will be adding this to the installer so that you can easily select SDTV or HDMI.

Have you removed the "hdmi_force_hotplug=1" and "hdmi_drive=1" lines from the default config.txt?  I'm using composite output and find that I have to edit this every time I flash a new version.

Great work by the way!  I've been following for a while and I'm finally able to play/see video with the .30 "beta" version! 

So folks, we got the installer working today. 

You can't see them (because they aren't implemented yet), but there are radio buttons for "HDTV/SDTV" selection : )

Hope to have this working sometime this week for our SDTV friends : )

So folks, we got the installer working today. 

You can't see them (because they aren't implemented yet), but there are radio buttons for "HDTV/SDTV" selection : )

Hope to have this working sometime this week for our SDTV friends : )

I haven't tested any installer (I use the "Win32 Disk Imager" program for preparing my SD cards), but I think you have a more basic problem with the implementation itself, regardless of how it's installed.

I'm afraid something must be wrong with your coding of the SDTV initialization, because I  get no signal at all from the composite output even after adding the same config.txt entries that work fine for other RPi images, (such as the non-Plex OpenELEC releases), with identical connections.

I use no HDMI cable at all, but only composite RCA plus the stereo plug, both connected via SCART adapter to a PAL CRT TV with 4:3 aspect ratio, and to configure this for the RPi I've added the following lines to the "config.txt" file of the Rasplex 0.1.32 SD card boot partition.
 

## sdtv_mode=2 => normal PAL, sdtv_aspect=1 => 4:3 (2=>14:9, 3=>16:9)

sdtv_mode=2

sdtv_aspect=1

CRT TVs need to skip some pixels at the edges of the theoretical screen

overscan_left=25

overscan_right=25

overscan_top=25

overscan_bottom=25

We can also disable those settings (1) or allow them to take effect (0)

disable_overscan=0

NB 1: Those overscan settings are just test values, to be tweaked later once the basic display works…

NB 2: This is not a 'PAL vs NTSC' conflict, since the CRT TV used does support both those SDTV standards

Adding those config lines to the normal RaspBMC SD card caused it to properly use PAL (previously it used NTSC), so I know that should work, but with the Rasplex boot I just get a black screen, whether it has the original config file or the one that has these lines added. The only way to get any picture at all is to connect it by HDMI to another TV (since this CRT TV has no HDMI).

I'm not at all sure how or why this is happening, but as far as I can see those settings are completely ignored by the Rasplex boot code.

Btw:

This is not for my own use, since I'd obviously use the HDMI-capable TV set instead. But I'm trying to set up a cheap media center for my brother, who currently only has a CRT TV available. Rasplex would be ideal for this, as I have lots of stuff on my Plex server to share with him, but unless this problem is fixed...

----- PRESS STOP UPDATE -----

In writing this post I kept rechecking various things, and I just found the main reason why it didn't work right.

In the "config.txt" file of this Rasplex SD card I now find a very strange and unmotivated addition, as follows:

################################################################################

End of default configuration

all values below this line were inserted from config.txt.bk (your old config)

and can be merged with the above values

################################################################################

#arm_freq=900

arm_freq=800

core_freq=450

sdram_freq=450

#force_turbo=1

#disable_overscan=1

hdmi_force_hotplug=1

hdmi_drive=2

gpu_mem_256=128

gpu_mem_512=200

The really odd thing about this is that there should not exist any "config.txt.bk (your old config)" when making a fresh install to a new card.

So those settings that messed everything up for me have just materialized out of thin air... (== incorrect code or incorrect release image)

I've now 'commented out' the two HDMI related entries in that added text section, and with this change Rasplex now boots correctly on the CRT TV.

With this change my immediate problem is solved, but I'm still leaving the initial part of my post as-is, so that others with similar problems will be able to recognize that this solution also may work for them.

Please change the future release images so that user defined entries are not overridden by entries from some 'imaginary' backup.

Btw:

In case I appear a bit negative towards Rasplex in this post, be assured that nothing could be farther from the truth.

I'm a big fan of this project, and any seeming negativity is just a side effect of struggling with the issue above.

Best regards: dlanor

dlanor, thank you for clarifying this. Commenting out the hdmi entires worked for me. Now I get awful low-res washed out colors on the composite line :lol:. I'll donate one of my surplus Pis to run on my father in laws' old secondary TV, a CRT or "tjock-TV" as we prefer to call them in Sweden.

My eyes literally hurt when setting this thing up... As an optometrist I could explain exactly why but I'll leave that for another post  ;). Thanks again.

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