Hi,
On 27-Apr-00 Dmitri wrote:
> On Wed, 26 Apr 2000, Randy Dunlap wrote:
>
>> Can any of you give me an update on the current status of v4l
>> frame data being returned as RBG vs. BGR? I recall that Alan said
>> that BGR is (historically) correct -- based on bttv.
>
> I don't really know how all this started, but the order of bytes is
> relatively easy to change (most cameras produce native YUV streams).
> Did someone propose to change BGR to RGB (as if there is nothing left
> to do in 2.3.99-pre#)?
Oh yes, easy to change, and then a paint in the you-know-what for
applications... :(
I've done some digging, and came to the following conclusions:
* all hardware grabber/TV cards use BGR
* nearly all applications drivers therefor use BGR
* the claim that read() should return RGB and mmap() BGR is bogus; no
single driver that I investigated implements this behaviour
* The only driver that dared to return RGB was the 'new' CPiA driver, and
I think that got quickly resolved.
Conclusion: use BGR everywhere; Alan agreed on that.
You can lookup my post and Alan's reply in the linux-usb archives. So can we
now please quit this mess?
> Since V4L is being phased out (slowly, admittedly) to be replaced with
> much more modular and rich V4L2
I'd like to point out that I consider the V4L2 bloat, and still not adequate
for webcams. I am therefor absolutely not in a hurry to make a V4L2
interface...
- Nemosoft
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