Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[mattkhan]

I have a magewell capture card - https://www.magewell.com/products/usb-capture-hdmi-plus

it has an app that tells you the incoming signal format which states that audio is 48kHz, 16bit, LPCM (as expected)

the Windows audio device settings also says it's 16bit, 48kHz

yet when I play this using jriver tv as a capture card, I see that MC DSP is receiving an input of 44.1kHz

in the log, I see

Code: [Select]

0005023: 14692: Playback: COutputPluginAudioRenderer::SetVideoFrameRate: Frame rate: 50 fps
0005023: 14692: TV: CAnalogTVDevice::BuildPreviewGraph: Preview Graph built
0005023: 14692: TV: 0x3964 DumpGraph: Start
0005023: 14692: TV: 0x3964 DumpGraph: Log_DumpGraph [21492bd0ca0]
0005023: 14692: TV: 0x3964 DumpGraph:     Filter [2148edde158]  'JRiver Audio Renderer'
0005023: 14692: TV: 0x3964 DumpGraph:         CLSID: {A4002F8E-510F-442C-8AD3-F9C7B23FB394}
0005023: 14692: TV: 0x3964 DumpGraph:         Host:
0005023: 14692: TV: 0x3964 DumpGraph:           Pin [214fd26cd38]  'In' [Input]  Connected to pin [21485760d78]
0005023: 14692: TV: 0x3964 DumpGraph:     Filter [214fbd1a308]  'JRVR'
0005023: 14692: TV: 0x3964 DumpGraph:         CLSID: {555E6803-14EF-4946-8646-B6EF9E9121E2}
0005023: 14692: TV: 0x3964 DumpGraph:         Host:
0005023: 14692: TV: 0x3964 DumpGraph:           Pin [214881f9e18]  '' [Input]  Connected to pin [21485a03f78]
0005023: 14692: TV: 0x3964 DumpGraph:     Filter [21481e37e98]  'HDMI (USB Capture HDMI+)'
0005023: 14692: TV: 0x3964 DumpGraph:         CLSID: {E30629D2-27E5-11CE-875D-00608CB78066}
0005023: 14692: TV: 0x3964 DumpGraph:         Host: c:\windows\system32\qcap.dll
0005023: 14692: TV: 0x3964 DumpGraph:           Pin [21485760d78]  'Capture' [Output]  Connected to pin [214fd26cd38]
0005023: 14692: TV: Log_DisplayType: Connection type  M type MEDIATYPE_Audio  S type MEDIASUBTYPE_PCM
0005023: 14692: TV: Log_DisplayType: Subtype description UNKNOWN
0005023: 14692: TV: Log_DisplayType: Not temporally compressed
0005023: 14692: TV: Log_DisplayType: Sample size 4
0005023: 14692: TV: Log_DisplayType:      Format type FORMAT_WaveFormatEx
0005023: 14692: TV: Log_DisplayType:      Subtype MEDIASUBTYPE_PCM
0005023: 14692: TV: Log_DisplayType: wFormatTag 1
0005023: 14692: TV: Log_DisplayType: nChannels 2
0005023: 14692: TV: Log_DisplayType: nSamplesPerSec 44100
0005023: 14692: TV: Log_DisplayType: nAvgBytesPerSec 176400
0005023: 14692: TV: Log_DisplayType: nBlockAlign 4
0005023: 14692: TV: Log_DisplayType: wBitsPerSample 16
0005023: 14692: TV: Log_DisplayType: cbSize 0

any idea why it arrives as 44.1 rather than the source format?