Bug Report No simultanous streaming and recording possible with Elgato CaptureCard

CommanderCH

New Member
I've been trying to run any version of OBS Studio (portable, non-portable, 32 bit and 64 bit), none of them work as soon as I attach the CaptureCard to the software (Video Capture Device).

Problem with non-portable version: It errors the recording. Streaming is fine. The only error I see is this:

16:39:10.258: [x264 encoder: 'recording_h264'] encode failed
16:39:10.283: Error encoding with encoder 'recording_h264'

Problem with portable 32 bit version: Same error as above.

Problem with portable 64 bit version: Elgato somewhat just doesn't popup in Video Capture Device list. Therefor a simultanous recording is no longer possible.

Whenever I kill the Elgato source, everything works just as planned. Even with different encoders for streaming and recording at the same time! Once I get it back (even with default settings) it just doesn't like to record whenever the stream is running. It just gets stuck at that error. That's it.

Settings: Almost everything on standard. Trying to do 1080p 60fps (mainly due to the recording), but also doesn't work with 720p 60fps with Lanczos downscaling option. Used the standard x264 encoder and also my hardware nvenc encoder. Recording Quality is only on High Quality. Anything else on standards. Bitrate is 3500 for streaming. It used to work before and my internet is fine. No clue why it broke. There was no update to my software.

Oh ya, it works perfectly when I only stream or only record. But streams are being muted by Twitch, when I use soundtracks (e.g. play a music game like Guitar Hero Live) so I'm kinda forced to do local recordings as well, if I want them on Youtube. I just have no clue, why both can't work simultanously.
 
Last edited:

CommanderCH

New Member
I just turned off the Elgato in sources (by pressing that eye symbol) and attempted to start streaming and recording. It crashed. I have to terminate the Elgato source, in order to being able to stream and record at the same time. (So basically it works fine when I only strema on PC as it seems)

Anyone has any source why that might happen?
 

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CommanderCH

New Member
Here some more tests. Fully installed OBS Studio 0.16.5, set everything manually again but only attaching the Elgato on sources this time (so no plugins for like TwitchAlerts or whatever). Same issue. Here's the complete log with all the settings and bla.
 

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  • 2016-12-06 17-06-36.txt
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CommanderCH

New Member
Problem isolated (workaround works):

It doesn't work when using Base Canvas 1920x1080 without downscaling. Whenever I downscale to 720p, it works all fine. EVERYTHING works all fine. In addition, even when I stream at 1080p, it somehow still results in streaming in 720p. Don't ask me why...
 
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