Question / Help NVENC and alt tabbing

cvax · Mar 14, 2014

Hi,

I know ShadowPlay doesn't really like alt-tabbing and it seems NVENC in OBS doesn't like it much either. Is there some setting I can do to address this or otherwise avoid this problem if I want to alt-tab? Thanks.

Lain · Mar 14, 2014

What happens when you alt-tab with nvenc on? This is the first time I've heard of it

dodgepong · Mar 14, 2014

Shadowplay encompasses both capture and encoding, while NVENC is just the encoder. Alt-tabbing shouldn't be affected by NVENC, so it's probably more likely an issue with the way you're using OBS.

Can you post your log? (Here's how)

cvax · Mar 14, 2014

My game, Titanfall, crashes after I try to alt tab back into it. The screen in the recording also goes black. Log file attached.

Code:

20:33:23: No Intel graphics adapter visible in QSVHelper.exe, Optimus problem?
20:33:23: CUDA loaded successfully
20:33:23: 1 CUDA capable devices found
20:33:23: [ GPU #0 - < GeForce GTX 750 Ti > has Compute SM 5.0, NVENC Available ]
20:35:06: Open Broadcaster Software v0.613b - 32bit (´・ω・｀)
20:35:06: -------------------------------
20:35:06: CPU Name: Intel(R) Core(TM) i7 CPU  920  @ 2.67GHz
20:35:06: CPU Speed: 2672MHz
20:35:06: Physical Memory:  4095MB Total, 4095MB Free
20:35:06: stepping id: 4, model 26, family 6, type 0, extmodel 0, extfamily 0, HTT 1, logical cores 8, total cores 4
20:35:06: monitor 1: pos={0, 0}, size={1920, 1200}
20:35:06: Windows Version: 6.1 Build 7601 S
20:35:06: Aero is Disabled
20:35:06: -------------------------------
20:35:06: OBS Modules:
20:35:06: Base Address  Module
20:35:06: 00370000  OBS.exe
20:35:06: 61E40000  OBSApi.dll
20:35:06: 66190000  BWCapture.dll
20:35:06: 66160000  DShowPlugin.dll
20:35:06: 6C0C0000  GraphicsCapture.dll
20:35:06: 6A7D0000  NoiseGate.dll
20:35:06: 66140000  PSVPlugin.dll
20:35:06: 66120000  scenesw.dll
20:35:06: ------------------------------------------
20:35:06: Adapter 1
20:35:06:  Video Adapter: NVIDIA GeForce GTX 750 Ti
20:35:06:  Video Adapter Dedicated Video Memory: 2070609920
20:35:06:  Video Adapter Shared System Memory: 2147807232
20:35:06:  Video Adapter Output 1: pos={0, 0}, size={1920, 1200}, attached=true
20:35:06: =====Stream Start: 2014-03-13, 20:35:06===============================================
20:35:06:  Multithreaded optimizations: On
20:35:06:  Base resolution: 1280x800
20:35:06:  Output resolution: 1280x800
20:35:06: ------------------------------------------
20:35:06: Loading up D3D10 on NVIDIA GeForce GTX 750 Ti (Adapter 1)...
20:35:06: ------------------------------------------
20:35:06: Audio Format: 48000 Hz
20:35:06: ------------------------------------------
20:35:06: Audio Channels: 2 Ch
20:35:06: Playback device Default
20:35:06: ------------------------------------------
20:35:06: Using desktop audio input: Speakers (SoundMAX Integrated Digital HD Audio)
20:35:06: Using quad speaker setup
20:35:07: ------------------------------------------
20:35:07: Using auxilary audio input: Microphone (Pro 9000)
20:35:07: ------------------------------------------
20:35:07: Audio Encoding: AAC
20:35:07:  bitrate: 160
20:35:07: Using graphics capture
20:35:07: Scene buffering time set to 400
20:35:07: NVENC internal init finished successfully
20:35:07: NVENC supports 7 h264 presets
20:35:07: ------------------------------------------
20:35:07: Video Encoding: NVENC
20:35:07:  fps: 60
20:35:07:  width: 1280, height: 800
20:35:07:  preset: bd
20:35:07:  profile: high
20:35:07:  level: autoselect
20:35:07:  keyint: 30
20:35:07:  CBR: yes
20:35:07:  CFR: no
20:35:07:  max bitrate: 10000
20:35:07:  avg bitrate: 10000
20:35:07:  buffer size: 10000
20:35:07: ------------------------------------------
20:35:08: SharedTexCapture hooked
20:35:08: Using RTMP service: Twitch / Justin.tv
20:35:08:  Server selection: rtmp://live.justin.tv/app
20:35:08:  Interface: Marvell Yukon 88E8056 PCI-E Gigabit Ethernet Controller #2 (ethernet, 100 mbps)
20:35:09: Completed handshake with rtmp://live.justin.tv/app in 71 ms.
20:35:09: SO_SNDBUF was at 8192
20:35:09: SO_SNDBUF is now 65536
20:35:09: RTMPPublisher::SocketLoop: Increasing send buffer to ISB 131072 (buffer: 0 / 1300480)
20:35:10: RTMPPublisher::SocketLoop: Increasing send buffer to ISB 262144 (buffer: 0 / 1300480)
20:39:29: RTMPPublisher::SocketLoop: Stalled for 1566 ms to write 16395 bytes (buffer: 0 / 1300480), unstable connection?
20:47:41: ++++++++++++++++++++++++++++++++++++++++++++++++++++++
20:47:41:  New Scene
20:47:41: Using Monitor Capture
20:47:47: ++++++++++++++++++++++++++++++++++++++++++++++++++++++
20:47:47:  New Scene
20:47:47: Using graphics capture
20:47:52: ++++++++++++++++++++++++++++++++++++++++++++++++++++++
20:47:52:  New Scene
20:47:52: Using Monitor Capture
20:47:56: Total frames encoded: 46106, total frames duplicated: 3265 (7.08%)
20:47:56: Number of frames skipped due to encoder lag: 532 (1.15%)
20:47:56: Total frames rendered: 45157, number of late frames: 348 (0.77%) (it's okay for some frames to be late)
20:47:57: RTMPPublisher::SocketLoop: Graceful loop exit
20:47:57: Average send payload: 12457 bytes, average send interval: 9 ms
20:47:57: Number of times waited to send: 2, Waited for a total of 8194 bytes
20:47:57: Number of b-frames dropped: 0 (0%), Number of p-frames dropped: 0 (0%), Total 0 (0%)
20:47:57: Number of bytes sent: 975429047
20:47:57: Encoder closed
20:47:57: NVENC deinitialized
20:47:57:
20:47:57: Profiler time results:
20:47:57:
20:47:57: ==============================================================
20:47:57: video thread frame - [100%] [avg time: 2.362 ms] [children: 97%] [unaccounted: 3.01%]
20:47:57: | scene->Preprocess - [4.4%] [avg time: 0.104 ms]
20:47:57: | GPU download and conversion - [92.6%] [avg time: 2.187 ms] [children: 46.7%] [unaccounted: 45.9%]
20:47:57: | | flush - [7.58%] [avg time: 0.179 ms]
20:47:57: | | CopyResource - [3.73%] [avg time: 0.088 ms]
20:47:57: | | conversion to 4:2:0 - [35.4%] [avg time: 0.836 ms]
20:47:57: Convert444Threads - [100%] [avg time: 0.567 ms] [children: 99.1%] [unaccounted: 0.882%]
20:47:57: | Convert444toNV12 - [99.1%] [avg time: 0.562 ms]
20:47:57: encoder thread frame - [100%] [avg time: 6.256 ms] [children: 0.991%] [unaccounted: 99%]
20:47:57: | sending stuff out - [0.991%] [avg time: 0.062 ms]
20:47:57: ==============================================================
20:47:57:
20:47:57:
20:47:57: Profiler CPU results:
20:47:57:
20:47:57: ==============================================================
20:47:57: video thread frame - [cpu time: avg 0.093 ms, total 4227.63 ms] [avg calls per frame: 1]
20:47:57: | scene->Preprocess - [cpu time: avg 0.019 ms, total 889.206 ms] [avg calls per frame: 1]
20:47:57: | GPU download and conversion - [cpu time: avg 0.054 ms, total 2464.82 ms] [avg calls per frame: 1]
20:47:57: | | flush - [cpu time: avg 0.032 ms, total 1450.81 ms] [avg calls per frame: 1]
20:47:57: | | CopyResource - [cpu time: avg 0.004 ms, total 187.203 ms] [avg calls per frame: 1]
20:47:57: | | conversion to 4:2:0 - [cpu time: avg 0.003 ms, total 140.4 ms] [avg calls per frame: 1]
20:47:57: Convert444Threads - [cpu time: avg 0.257 ms, total 23228.5 ms] [avg calls per frame: 2]
20:47:57: | Convert444toNV12 - [cpu time: avg 0.256 ms, total 23150.5 ms] [avg calls per frame: 2]
20:47:57: encoder thread frame - [cpu time: avg 3.361 ms, total 154925 ms] [avg calls per frame: 1]
20:47:57: | sending stuff out - [cpu time: avg 0.041 ms, total 1903.21 ms] [avg calls per frame: 1]
20:47:57: ==============================================================
20:47:57:
20:47:57: =====Stream End: 2014-03-13, 20:47:57=================================================


Last game capture log:
2014-03-13, 20:35:07: we're booting up:
20:35:07: CaptureThread: attached to process TitanFall.exe
20:35:07: DXGI Present
20:35:07: (half life scientist) everything..  seems to be in order
20:35:07: DXGI: Found D3D 11
20:35:07: setting up d3d11 data
20:35:07: ---------------------- Cleared D3D11 Capture ----------------------
20:35:07: found dxgi format (dx11) of: 28, size: {1920, 1200}, multisampled: false
20:35:07: DoD3D11Hook: success
20:35:08: successfully capturing d3d11 frames via GPU
20:47:41: stop requested, terminating d3d11 capture
20:47:41: ---------------------- Cleared D3D11 Capture ----------------------
20:47:46: ---------------------- Cleared D3D11 Capture ----------------------

Sapiens · Mar 14, 2014

Run Titanfall in borderless windowed mode, Source engine games are notoriously finicky about alt-tabbing. Add -window and -noborder to your launch command line.

cvax · Mar 14, 2014

I did some more testing just now. Seems like the issue is with NVENC + Fraps + alt tab? If any one of those three is not there, no issue. Weird.

Floatingthru · Mar 14, 2014

Fraps is known to break Game Capture at times. If possible don't use it, or do what Sapiens has said then use Window Capture.

Question / Help NVENC and alt tabbing

cvax

Member

Lain

dodgepong

Administrator

cvax

Member

Sapiens

cvax

Member

Floatingthru