Audio works but no video

B

bwelch42

New Member
After installing OBS Studio to record some Microsoft Teams meetings, only audio of each meeting works. Instead of video I see an blank white screen for youtube or an initial meeting screen image for a Teams meeting. It's the same when I run OBS Studio as myself or administrator. Uninstalling and reinstalling OBS Studio didn't help.

The log from at attempt to record part of a youtube video in a firefox window is here: https://obsproject.com/logs/8rlNeaLz5A9lnXQu

What should I try next?

Current log file:

14:32:33.251: CPU Name: Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
14:32:33.251: CPU Speed: 2112MHz
14:32:33.251: Physical Cores: 4, Logical Cores: 8
14:32:33.251: Physical Memory: 16244MB Total, 7790MB Free
14:32:33.251: Windows Version: 10.0 Build 17763 (release: 1809; revision: 1697; 64-bit)
14:32:33.251: Running as administrator: false
14:32:33.251: Aero is Enabled (Aero is always on for windows 8 and above)
14:32:33.251: Windows 10 Gaming Features:
14:32:33.251: Game Bar: On
14:32:33.251: Game DVR: On
14:32:33.251: Game DVR Background Recording: On
14:32:33.259: Sec. Software Status:
14:32:33.260: Windows Defender Antivirus: enabled (AV)
14:32:33.261: Windows Firewall: enabled (FW)
14:32:33.261: Windows Defender Antivirus: enabled (ASW)
14:32:33.261: Current Date/Time: 2021-01-29, 14:32:33
14:32:33.261: Browser Hardware Acceleration: true
14:32:33.261: Portable mode: false
14:32:33.638: OBS 26.1.1 (64-bit, windows)
14:32:33.638: ---------------------------------
14:32:33.640: ---------------------------------
14:32:33.640: audio settings reset:
14:32:33.640: samples per sec: 48000
14:32:33.640: speakers: 2
14:32:33.642: ---------------------------------
14:32:33.642: Initializing D3D11...
14:32:33.642: Available Video Adapters:
14:32:33.646: Adapter 0: Intel(R) UHD Graphics 620
14:32:33.646: Dedicated VRAM: 134217728
14:32:33.646: Shared VRAM: 4222068736
14:32:33.646: PCI ID: 8086:5917
14:32:33.647: Driver Version: 24.20.100.6170
14:32:33.647: output 0: pos={0, 0}, size={1920, 1200}, attached=true, refresh=59, name=DELL U2415
14:32:33.647: output 1: pos={1920, 0}, size={1920, 1080}, attached=true, refresh=59, name=ASUS VE258
14:32:33.649: Loading up D3D11 on adapter Intel(R) UHD Graphics 620 (0)
14:32:33.664: D3D11 loaded successfully, feature level used: b000
14:32:33.664: DXGI increase maximum frame latency success
14:32:34.086: ---------------------------------
14:32:34.086: video settings reset:
14:32:34.086: base resolution: 1920x1080
14:32:34.086: output resolution: 1920x1080
14:32:34.086: downscale filter: Bicubic
14:32:34.086: fps: 60/1
14:32:34.086: format: NV12
14:32:34.086: YUV mode: 709/Partial
14:32:34.086: NV12 texture support not available
14:32:34.087: Audio monitoring device:
14:32:34.087: name: Default
14:32:34.087: id: default
14:32:34.090: ---------------------------------
14:32:34.096: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
14:32:34.097: Failed to load 'en-US' text for module: 'decklink-captions.dll'
14:32:34.098: Failed to load 'en-US' text for module: 'decklink-ouput-ui.dll'
14:32:34.138: [AMF] Unable to load 'amfrt64.dll', error code 126.
14:32:34.144: [AMF] AMF Test failed due to one or more errors.
14:32:34.144: Failed to initialize module 'enc-amf.dll'
14:32:34.170: [obs-browser]: Version 2.9.1
14:32:34.170: [obs-browser]: CEF Version 75.1.16+g16a67c4+chromium-75.0.3770.100
14:32:34.200: Couldn't find VLC installation, VLC video source disabled
14:32:34.211: A DeckLink iterator could not be created. The DeckLink drivers may not be installed
14:32:34.212: No blackmagic support
14:32:34.219: ---------------------------------
14:32:34.219: Loaded Modules:
14:32:34.219: win-wasapi.dll
14:32:34.219: win-mf.dll
14:32:34.219: win-dshow.dll
14:32:34.219: win-decklink.dll
14:32:34.219: win-capture.dll
14:32:34.219: vlc-video.dll
14:32:34.219: text-freetype2.dll
14:32:34.219: rtmp-services.dll
14:32:34.219: obs-x264.dll
14:32:34.219: obs-vst.dll
14:32:34.219: obs-transitions.dll
14:32:34.219: obs-text.dll
14:32:34.219: obs-qsv11.dll
14:32:34.219: obs-outputs.dll
14:32:34.219: obs-filters.dll
14:32:34.219: obs-ffmpeg.dll
14:32:34.219: obs-browser.dll
14:32:34.219: image-source.dll
14:32:34.219: frontend-tools.dll
14:32:34.219: enc-amf.dll
14:32:34.219: decklink-ouput-ui.dll
14:32:34.219: decklink-captions.dll
14:32:34.219: coreaudio-encoder.dll
14:32:34.219: ---------------------------------
14:32:34.219: ==== Startup complete ===============================================
14:32:34.225: All scene data cleared
14:32:34.225: ------------------------------------------------
14:32:34.291: WASAPI: Device 'Headset Earphone (4- Logitech B530 USB Headset)' [48000 Hz] initialized
14:32:34.291: [Loaded global audio device]: 'Desktop Audio'
14:32:34.316: WASAPI: Device 'Headset Microphone (4- Logitech B530 USB Headset)' [44100 Hz] initialized
14:32:34.316: [Loaded global audio device]: 'Mic/Aux'
14:32:34.316: [window-capture: 'Window Capture'] update settings:
14:32:34.316: executable: firefox.exe
14:32:34.316: method selected: Automatic
14:32:34.316: method chosen: BitBlt
14:32:34.316:
14:32:34.317: Switched to scene 'Scene'
14:32:34.317: ------------------------------------------------
14:32:34.317: Loaded scenes:
14:32:34.317: - scene 'Scene':
14:32:34.317: - source: 'Window Capture' (window_capture)
14:32:34.317: ------------------------------------------------
14:32:34.356: adding 42 milliseconds of audio buffering, total audio buffering is now 42 milliseconds (source: Mic/Aux)
14:32:34.356:
14:32:46.276: >>> nv12 tex not active, fall back to old qsv encoder
14:32:46.276: [qsv encoder: 'simple_h264_recording'] settings:
14:32:46.276: rate_control: ICQ
14:32:46.276: ICQ Quality: 23
14:32:46.276: fps_num: 60
14:32:46.276: fps_den: 1
14:32:46.276: width: 1920
14:32:46.276: height: 1080
14:32:46.276: [qsv encoder: 'simple_h264_recording'] debug info:
14:32:46.288: impl: D3D11
14:32:46.288: surf: D3D11
14:32:46.333: m_nSurfNum: 12
14:32:46.335: m_nTaskPool: 4
14:32:46.335: major: 1
14:32:46.335: minor: 26
14:32:46.335: ---------------------------------
14:32:46.335: [FFmpeg aac encoder: 'simple_aac_recording'] bitrate: 192, channels: 2, channel_layout: 3
14:32:46.335:
14:32:46.343: ==== Recording Start ===============================================
14:32:46.343: [ffmpeg muxer: 'simple_file_output'] Writing file 'C:/Users/bryan.welch/Videos/2021-01-29 14-32-46.mkv'...
14:32:51.981: [ffmpeg muxer: 'simple_file_output'] Output of file 'C:/Users/bryan.welch/Videos/2021-01-29 14-32-46.mkv' stopped
14:32:51.981: Output 'simple_file_output': stopping
14:32:51.981: Output 'simple_file_output': Total frames output: 327
14:32:51.981: Output 'simple_file_output': Total drawn frames: 338
14:32:51.981: ==== Recording Stop ================================================
 
B

bwelch42

New Member
I was able to fix this. At first I didn't think this was the 'black screen issue' as the recordings sometimes included a white screen or an image from the start of the video. Changing a few settings on the Dell laptop fixed things.

First, by searching for 'graphics settings' I could see this laptop has two Intel UHD Graphics 620 GPUs. It was previously set to 'High performance' and I changed it to 'Power saving'.
obs2.PNG

Next, I right-clicked on the desktop and clicked on 'Intel Graphics Settings', clicked on 'Browse' to find the obs64.exe executable file and selected it. Other settings were left as shown and after that recordings worked as expected. Hopefully this helps someone out to get OBS Studio working on their work laptop.

obs1.PNG
 
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