Bug Report Audio quality issue

[Klaydoggy]

I don't know if this would go under the "audio pops" topic or not... so here it is...

Xbox 360 via component/RCA > Black Magic Intensity Shuttle usb 3.0 > Laptop running OBS. I get video and audio, but the audio is bad, has static sounds through it.

Open Broadcaster Software v0.466a - 32bit (´・ω・｀)
-------------------------------
CPU Name: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
CPU Speed: 1995MHz
Physical Memory:  4095MB Total, 4095MB Free
stepping id: 7, model 10, family 6, type 0, extmodel 1, extfamily 0, HTT 1, logical cores 8, total cores 4
Windows Version: 6.1 Build 7601 S
Aero is Enabled
------------------------------------------
Adapter 1
  Video Adapter: NVIDIA GeForce GTX 570M
  Video Adapter Dedicated Video Memory: 1560739840
  Video Adapter Shared System Memory: 2684235776
=====Stream Start=====================================================================
  Multithreaded optimizations: On
  Base resolution: 1280x720
  Output resolution: 1280x720
------------------------------------------
Loading up D3D10...
------------------------------------------
Using auxilary audio input: Microphone (Realtek High Definition Audio)
------------------------------------------
Audio Encoding: AAC
    bitrate: 128
------------------------------------------
    device: Blackmagic WDM Capture,
    device id \\?\decklink#avstream#7&1c41d73d&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\decklinkcapture1,
    chosen type: HDYC, usingFourCC: true, res: 1280x720 - 1280x720, fps: 59.9402-59.9402, fourCC: 'HDYC'

Using directshow input
------------------------------------------
Video Encoding: x264
    fps: 60
    width: 1280, height: 720
    preset: veryfast
    CBR: no
    max bitrate: 1000
    buffer size: 1000
    quality: 8
------------------------------------------
Total frames rendered: 39232, number of frames that lagged: 5 (0.01%) (it's okay for some frames to lag)
=====Stream End=======================================================================
=====Stream Start=====================================================================
  Multithreaded optimizations: On
  Base resolution: 1280x720
  Output resolution: 1280x720
------------------------------------------
Loading up D3D10...
------------------------------------------
Using auxilary audio input: Microphone (Realtek High Definition Audio)
------------------------------------------
Audio Encoding: AAC
    bitrate: 128
------------------------------------------
    device: Blackmagic WDM Capture,
    device id \\?\decklink#avstream#7&1c41d73d&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\decklinkcapture1,
    chosen type: HDYC, usingFourCC: true, res: 1280x720 - 1280x720, fps: 59.9402-59.9402, fourCC: 'HDYC'

Using directshow input
------------------------------------------
Video Encoding: x264
    fps: 60
    width: 1280, height: 720
    preset: veryfast
    CBR: no
    max bitrate: 1000
    buffer size: 1000
    quality: 8
------------------------------------------
Using RTMP service: Twitch / Justin.tv
  Server selection: rtmp://live-lax.justin.tv/app
bufferTime: 1401, outputRateWindowTime: 1000, dropThreshold: 1901
Total frames rendered: 3312, number of frames that lagged: 2 (0.06%) (it's okay for some frames to lag)
RTMPPublisher::SocketLoop: Aborting due to bStopping
Number of b-frames dropped: 0 (0%), Number of p-frames dropped: 0 (0%), Total 0 (0%)
=====Stream End=======================================================================

Profiler results:

==============================================================
frame - [100%] [avg time: 4.219 ms] [avg calls per frame: 1] [children: 86.8%] [unaccounted: 13.2%]
| scene->Preprocess - [19.9%] [avg time: 0.838 ms] [avg calls per frame: 1]
| video encoding and uploading - [67%] [avg time: 2.826 ms] [avg calls per frame: 1] [children: 41.8%] [unaccounted: 25.2%]
| | CopyResource - [0.521%] [avg time: 0.022 ms] [avg calls per frame: 0]
| | conversion to 4:2:0 - [0.545%] [avg time: 0.023 ms] [avg calls per frame: 0]
| | call to encoder - [40.7%] [avg time: 1.717 ms] [avg calls per frame: 0]
| | sending stuff out - [0.0474%] [avg time: 0.002 ms] [avg calls per frame: 0]
==============================================================

I tried changing the audio to mp3 instead of aac, and it crashes OBS. I also tried the other bitrates for aac and it sounded the same.

Here's a brief recording on Twitch so you can hear it. - http://www.twitch.tv/nerd_junkies/b/362888472

Any ideas?

 

[Lain]

I know that blackmagic has some issues with audio output in general, you may need to mess with its internal configuration. I'm not entirely sure. You're using "output to desktop" so I don't really know much about what its audio settings are at.

The WDM thing seems to have issues on occasion for some reason, I don't quite know why.