Re: some question about

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On Sun, Sep 5, 2010 at 12:06 PM, loody <miloody@xxxxxxxxx> wrote:
> hi:
>
> 2010/9/5 Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx>:
>> On Sun, Sep 5, 2010 at 11:48 AM, Devin Heitmueller
>> <dheitmueller@xxxxxxxxxxxxxx> wrote:
>>> On Sun, Sep 5, 2010 at 11:36 AM, loody <miloody@xxxxxxxxx> wrote:
>>>> WinTV-HVR-1950 high performance USB TV tuner
>>>> WinTV-HVR-950Q for laptop and notebooks
>>>
>>> Both these devices are supported under Linux, and in fact are unlikely
>>> to work properly with only Full Speed USB.  At least the 950q
>>> definitely requires High speed (I put a check in there to specifically
>>> not load the driver otherwise).
>>
>> I perhaps misread your original email.  While the 950q does present
>> itself as a USB audio class device, the 1950 does not.  It only
>> provides MPEG encoded output (containing both the audio and video),
>> and is not a USB audio class device.
>>
>> So while both these devices will work under Linux on a high speed
>> interface, if you specifically require the device to identify itself
>> as a USB audio class device, only the 950q does this.
>>
>> Devin
> would you mind to send me the device descriptors for me?
> I want to check whether the input/output unit and audio/video format
> does meet the spec.
> BTW, will the device support mp3 output?
> since the spec define mp3 as one of input/output format.
> that means if I put the raw data of mp3 to that device, it should
> play/record well.

The device descriptors can be found here:

http://linuxtv.org/wiki/index.php/Hauppauge_WinTV-HVR-950Q#Identification

The device does not support MP3 output (virtually no devices do as far
as I know).  It only provides raw 16-bit two channel PCM.

The video format would not be in the spec you mentioned.  It does work
as a standard V4L2 device though, providing raw YUYV video frames.

Perhaps if I better understood your intended application, I might be
able to give better advice.

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com
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