Question / Help 5.1 audio downmix to stereo

obsgnub

New Member
Hello,

I'm currently missing audio channels when streaming via OBS. I'm only hearing the first 2 audio channels. My configuration is as follows:
Capture: AJA U-TAP SDI
RTMP Server: NGINX 1.19.15
Player: VLC 2.2.4


My issue looks very similar to the one described here: https://obsproject.com/mantis/view.php?id=837 . Is it possible that the fix would also allow me to hear all of the audio in my source? If so, how would I get access to version 19?

Thanks!
 

Fenrir

Forum Admin
No, that fix was specific to the Blackmagic (decklink) source type.

Can you get a log so we can see if anything seems out of sorts?
 

obsgnub

New Member
Yeah, I figured it wouldn't apply, but you never know :)

Code:
11:53:41.036: CPU Name: Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz
11:53:41.036: CPU Speed: 3312MHz
11:53:41.036: Physical Cores: 4, Logical Cores: 4
11:53:41.036: Physical Memory: 8072MB Total, 6083MB Free
11:53:41.036: Windows Version: 10.0 Build 14393 (revision: 1066; 64-bit)
11:53:41.036: Running as administrator: false
11:53:41.036: Aero is Enabled (Aero is always on for windows 8 and above)
11:53:41.036: Portable mode: false
11:53:41.056: OBS 18.0.0 (64bit, windows)
11:53:41.056: ---------------------------------
11:53:41.056: ---------------------------------
11:53:41.056: audio settings reset:
11:53:41.056:     samples per sec: 44100
11:53:41.056:     speakers:        2
11:53:41.085: Warning: The OpenGL renderer is currently in use.  On windows, the OpenGL renderer can decrease capture performance due to the lack of specific features used to maximize capture performance.  The Direct3D 11 renderer is recommended instead.
11:53:41.106: ---------------------------------
11:53:41.106: video settings reset:
11:53:41.106:     base resolution:   1920x1080
11:53:41.106:     output resolution: 1152x648
11:53:41.106:     downscale filter:  Bicubic
11:53:41.106:     fps:               30000/1001
11:53:41.106:     format:            NV12
11:53:41.107: ---------------------------------
11:53:41.110: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/chrome_elf.dll' not found, loading of module failed
11:53:41.111: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
11:53:41.112: [AMF Encoder] Unable to load 'amfrt64.dll', error code 126.
11:53:41.119: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libcef.dll' not found, loading of module failed
11:53:41.119: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libEGL.dll' not found, loading of module failed
11:53:41.120: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libGLESv2.dll' not found, loading of module failed
11:53:41.120: Failed to load 'en-US' text for module: 'obs-browser.dll'
11:53:41.120: [browser_source: 'Version: 1.29.0']
11:53:41.121: LoadLibrary failed for 'nvEncodeAPI64.dll': The specified module could not be found.
11:53:41.121:  (126)
11:53:41.132: Couldn't find VLC installation, VLC video source disabled
11:53:41.136: No blackmagic support
11:53:41.288: ---------------------------------
11:53:41.288:   Loaded Modules:
11:53:41.288:     win-wasapi.dll
11:53:41.288:     win-mf.dll
11:53:41.288:     win-dshow.dll
11:53:41.288:     win-decklink.dll
11:53:41.288:     win-capture.dll
11:53:41.288:     vlc-video.dll
11:53:41.288:     text-freetype2.dll
11:53:41.288:     rtmp-services.dll
11:53:41.288:     obs-x264.dll
11:53:41.288:     obs-vst.dll
11:53:41.288:     obs-transitions.dll
11:53:41.288:     obs-text.dll
11:53:41.288:     obs-qsv11.dll
11:53:41.288:     obs-outputs.dll
11:53:41.288:     obs-filters.dll
11:53:41.288:     obs-ffmpeg.dll
11:53:41.288:     obs-browser.dll
11:53:41.288:     image-source.dll
11:53:41.288:     frontend-tools.dll
11:53:41.288:     enc-amf.dll
11:53:41.288:     coreaudio-encoder.dll
11:53:41.288: ==== Startup complete ===============================================
11:53:41.295: Switched to Preview/Program mode
11:53:41.295: ------------------------------------------------
11:53:41.298: All scene data cleared
11:53:41.298: ------------------------------------------------
11:53:41.317: WASAPI: Device 'Digital Audio Interface (U-TAP SDI Audio)' initialized
11:53:41.319: ---------------------------------
11:53:41.320: [DShow Device: 'AJA UTAP - Video'] settings updated:
11:53:41.320:     video device: U-TAP SDI Video
11:53:41.320:     video path: \\?\usb#vid_1f6a&pid_15ae&mi_00#6&2f509686&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global
11:53:41.320:     resolution: 1280x720
11:53:41.320:     fps: 30.00 (interval: 333333)
11:53:41.320:     format: YUY2
11:53:41.320: Switched to scene 'UTAP - STREAM 2'
11:53:41.321: ------------------------------------------------
11:53:41.321: Loaded scenes:
11:53:41.321: - scene 'UTAP - STREAM 2':
11:53:41.321:     - source: 'AJA UTAP - Video' (dshow_input)
11:53:41.321:     - source: 'AJA UTAP - Audio' (wasapi_input_capture)
11:53:41.321: ------------------------------------------------
11:53:41.354: adding 23 milliseconds of audio buffering, total audio buffering is now 23 milliseconds
11:53:42.942: ---------------------------------
11:53:42.942: [x264 encoder: 'simple_h264_stream'] preset: veryfast
11:53:42.942: [x264 encoder: 'simple_h264_stream'] settings:
11:53:42.942:     rate_control: CBR
11:53:42.942:     bitrate:      2500
11:53:42.942:     buffer size:  2500
11:53:42.942:     crf:          0
11:53:42.942:     fps_num:      30000
11:53:42.942:     fps_den:      1001
11:53:42.942:     width:        1152
11:53:42.942:     height:       648
11:53:42.942:     keyint:       250
11:53:42.942:     vfr:          off
11:53:42.942:
11:53:42.955: [Media Foundation AAC: 'simple_aac']: encoder created
11:53:42.955:     bitrate: 160
11:53:42.955:     channels: 2
11:53:42.955:     sample rate: 44100
11:53:42.955:     bits-per-sample: 16
11:53:42.955:
11:53:42.955: [rtmp stream: 'simple_stream'] Connecting to RTMP URL rtmp://192.168.0.12:1935/live1...
11:53:42.958: [rtmp stream: 'simple_stream'] Interface: Intel(R) Ethernet Connection (2) I219-LM (ethernet, 1000 mbps)
11:53:43.093: [rtmp stream: 'simple_stream'] Connection to rtmp://192.168.0.12:1935/live1 successful
11:53:43.096: ==== Streaming Start ===============================================
11:56:08.317: adding 23 milliseconds of audio buffering, total audio buffering is now 46 milliseconds
 
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