Question / Help Failed to start streaming - Output failed

[Tiefman]

OBS was working fine like 10 minutes ago on NVENC encoding to twitch for live stream, now I get an error "Failed to start streaming". Literally no settings have been changed. GPU drivers and windows drivers are all up to date.


Log:


13:57:10.659: CPU Name: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz
13:57:10.659: CPU Speed: 4200MHz
13:57:10.659: Physical Cores: 4, Logical Cores: 8
13:57:10.659: Physical Memory: 16314MB Total, 9293MB Free
13:57:10.659: Windows Version: 10.0 Build 18362 (revision: 418; 64-bit)
13:57:10.659: Running as administrator: false
13:57:10.659: Aero is Enabled (Aero is always on for windows 8 and above)
13:57:10.659: Windows 10 Gaming Features:
13:57:10.659: Game DVR: On
13:57:10.660: Sec. Software Status:
13:57:10.662: Windows Defender Antivirus: enabled (AV)
13:57:10.662: Windows Firewall: enabled (FW)
13:57:10.663: Current Date/Time: 2019-11-10, 13:57:10
13:57:10.663: Browser Hardware Acceleration: true
13:57:10.663: Portable mode: false
13:57:10.851: OBS 24.0.3 (64-bit, windows)
13:57:10.851: ---------------------------------
13:57:10.851: ---------------------------------
13:57:10.851: audio settings reset:
13:57:10.851: samples per sec: 44100
13:57:10.851: speakers: 2
13:57:10.852: ---------------------------------
13:57:10.852: Initializing D3D11...
13:57:10.852: Available Video Adapters:
13:57:10.854: Adapter 0: NVIDIA GeForce GTX 1080 Ti
13:57:10.854: Dedicated VRAM: 3077570560
13:57:10.854: Shared VRAM: 4258543616
13:57:10.854: output 0: pos={0, 0}, size={1920, 1080}, attached=true
13:57:10.855: Loading up D3D11 on adapter NVIDIA GeForce GTX 1080 Ti (0)
13:57:10.894: D3D11 loaded successfully, feature level used: b000
13:57:10.894: D3D11 GPU priority setup failed (not admin?)
13:57:11.269: ---------------------------------
13:57:11.269: video settings reset:
13:57:11.269: base resolution: 1920x1080
13:57:11.269: output resolution: 1920x1080
13:57:11.269: downscale filter: Bicubic
13:57:11.269: fps: 60/1
13:57:11.269: format: NV12
13:57:11.269: YUV mode: 601/Partial
13:57:11.269: NV12 texture support enabled
13:57:11.271: Audio monitoring device:
13:57:11.271: name: Default
13:57:11.271: id: default
13:57:11.271: ---------------------------------
13:57:11.275: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
13:57:11.275: Failed to load 'en-US' text for module: 'decklink-ouput-ui.dll'
13:57:11.308: [AMF] AMF Test failed due to one or more errors.
13:57:11.308: Failed to initialize module 'enc-amf.dll'
13:57:11.325: [obs-browser]: Version 2.7.15
13:57:11.329: NVENC supported
13:57:11.392: Couldn't find VLC installation, VLC video source disabled
13:57:11.398: No blackmagic support
13:57:11.401: ---------------------------------
13:57:11.401: Loaded Modules:
13:57:11.401: win-wasapi.dll
13:57:11.401: win-mf.dll
13:57:11.401: win-dshow.dll
13:57:11.401: win-decklink.dll
13:57:11.401: win-capture.dll
13:57:11.401: vlc-video.dll
13:57:11.401: text-freetype2.dll
13:57:11.401: rtmp-services.dll
13:57:11.401: obs-x264.dll
13:57:11.401: obs-vst.dll
13:57:11.401: obs-transitions.dll
13:57:11.401: obs-text.dll
13:57:11.401: obs-qsv11.dll
13:57:11.401: obs-outputs.dll
13:57:11.401: obs-filters.dll
13:57:11.401: obs-ffmpeg.dll
13:57:11.401: obs-browser.dll
13:57:11.401: image-source.dll
13:57:11.401: frontend-tools.dll
13:57:11.401: enc-amf.dll
13:57:11.401: decklink-ouput-ui.dll
13:57:11.401: coreaudio-encoder.dll
13:57:11.401: ---------------------------------
13:57:11.401: ==== Startup complete ===============================================
13:57:11.404: All scene data cleared
13:57:11.404: ------------------------------------------------
13:57:11.429: WASAPI: Device 'Speakers (Schiit Modi Uber)' initialized
13:57:11.441: WASAPI: Device 'Microphone (Rift Audio)' initialized
13:57:11.442: Switched to scene 'Scene'
13:57:11.442: ------------------------------------------------
13:57:11.442: Loaded scenes:
13:57:11.442: - scene 'Scene':
13:57:11.442: - source: 'Desktop' (monitor_capture)
13:57:11.442: ------------------------------------------------
13:57:11.469: adding 46 milliseconds of audio buffering, total audio buffering is now 46 milliseconds (source: Mic/Aux)
13:57:11.469:
13:57:12.497: [jim-nvenc: 'simple_h264_stream'] init_session: nv.nvEncOpenEncodeSessionEx(&params, &enc->session) failed: 10 (NV_ENC_ERR_OUT_OF_MEMORY)
13:57:12.505: ---------------------------------
13:57:12.505: [NVENC encoder: 'simple_h264_stream'] settings:
13:57:12.505: rate_control: CBR
13:57:12.505: bitrate: 6000
13:57:12.505: cqp: 0
13:57:12.505: keyint: 120
13:57:12.505: preset: hq
13:57:12.505: profile: high
13:57:12.505: width: 1920
13:57:12.505: height: 1080
13:57:12.505: 2-pass: false
13:57:12.505: b-frames: 2
13:57:12.505: GPU: 0
13:57:12.505:
13:57:12.589: [NVENC encoder: 'simple_h264_stream'] Failed to open NVENC codec: Generic error in an external library
13:57:12.589: Stream output type 'rtmp_output' failed to start!

 

[kram106]

For this error, I'd assume that something is already using NVENC. From the log, I can see that your game DVR is on. I'd recommend disabling the game bar as this can use the NVENC encoder and conflict with OBS (win+s, game bar settings, turn switch off)