Re: some question about
On Sun, Sep 5, 2010 at 12:06 PM, loody wrote: > hi: > > 2010/9/5 Devin Heitmueller : >> On Sun, Sep 5, 2010 at 11:48 AM, Devin Heitmueller >> wrote: >>> On Sun, Sep 5, 2010 at 11:36 AM, loody 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 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: some question about
hi: 2010/9/5 Devin Heitmueller : > On Sun, Sep 5, 2010 at 11:48 AM, Devin Heitmueller > wrote: >> On Sun, Sep 5, 2010 at 11:36 AM, loody 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. appreciate your help, miloody -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: some question about
On Sun, Sep 5, 2010 at 11:48 AM, Devin Heitmueller wrote: > On Sun, Sep 5, 2010 at 11:36 AM, loody 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 -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: some question about
On Sun, Sep 5, 2010 at 11:36 AM, loody 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). Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
some question about
dear all: I saw there is a "Audio Devices Rev. 2.0 Spec and Adopters Agreement" on the usb org. But so far my device can bought are FS instead of HS. Since I need HS audio device which list in "Audio Devices Rev. 2.0 Spec and Adopters Agreement" to verification the performance of my host. I try very hard to find some possible devices with linux support on the net. per your experience, are below 2 meet "Audio Devices Rev. 2.0 Spec and Adopters Agreement"? WinTV-HVR-1950 high performance USB TV tuner WinTV-HVR-950Q for laptop and notebooks if they are not would you please tell me where and what device meet the spec requirement and also supported by linux. appreciate your help, miloody -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
