[MPlayer-users] Capturing from composite using a bktr card on OpenBSD

Edd Barrett vext01 at gmail.com
Mon Jan 9 21:32:29 CET 2012


On 9 January 2012 20:18, Reimar Döffinger <Reimar.Doeffinger at gmx.de> wrote:
> On Mon, Jan 09, 2012 at 03:58:23PM +0000, Edd Barrett wrote:
>> Hi,
>> I am using mplayer in combination with a bktr card to play my old sega
>> megadrive. It works, but something is not quite right:
>>  - odd "scanlines" across picture.
>>  - colours are really intense and psychedelic.
>> I am no expert in video, colour spaces, timings etc, so I can't
>> provide any decent insight as to why this happens, but I can provide a
>> couple of screenshots:
>> http://imgur.com/a/7YqqP
>> The first screenshot is supposed to have a blue background IIRC.
> How does that blue with the wrong colour compare to the blue that has
> the correct colour in the capture?

A false green which should be blue is a blocky flickery green.

> How do you connect the capture card?

I am using a sega megadrive composite cable; this exact one:

I plug this into the composite (input 0) of my bktr card, which is a:
bktr0 at pci3 dev 2 function 0 "Brooktree BT878" rev 0x02: apic 8 int 18
bktr0: Card has no configuration EEPROM. Cannot determine card make.
bktr0: IMS TV Turbo, Philips FR1236 NTSC FM tuner.

Here it has guessed(?) that the card is NTSC, I think this is the
problem. The bktr(4) manual page has a kernel option "option
BKTR_OVERRIDE_CARD=nnn" which I can force to PAL perhaps?

I will try this.

Best Regards
Edd Barrett


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