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I have been a long time Wirecast user for our podcast. There are a few things about it I just don't like, so last night I downloaded the trial version of vMix. So far, I am very impressed, but there are a few things keeping me from purchasing the product that I hope this forum can help me with:
1. How do I delete an input? I created an input with a single image before I realized the next option down was a slide show (something I have been begging Wirecast to do since version 3).
2. I have only done some test recordings, no streaming yet, and the CPU usage is VERY high. With Wirecast, I can stream and record and still keep the CPU under 60% (total usage). My broadcast machine is a Core i7 3770k OC to 4.2Ghz running Windows 7. I am using the MP4 recording option with "Use Hardware Encoder" checked, but the total CPU usage is still 85%+. My video card is an AMD Radeon HD 7800 Series. I also have an AverMedia C985 card in the machine if that helps. Of course my concern is if I am already maxing out the CPU with just the local recording, then there is no way I could also stream the video.
Thanks for the help!
Mike
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Mike,
1. Select "Close on the input, That will remove it.
2. You should have plenty of CPU horsepower with that set-up. What other processes or s/w are running at the same time?
What version of vMix did you download? 13? 14? Just curious.
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Rank: Advanced Member
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Well that was super simple, can't believe I missed how to remove the input. Thanks!
I am running vMix 13 and the only other processes I had running on the system was the Chrome browser with several tabs open. Is there any way for vMix to use the AverMedia C985 to handle the encoding?
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jpeg2RAW wrote:Is there any way for vMix to use the AverMedia C985 to handle the encoding? Not for vMix. Just record or stream with AverMedia software (RECentral), using vMix as a source.
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Rank: Advanced Member
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Regarding your high CPU usage, I forgot to ask... what resolution are you using?
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MP4 is very CPU intensive. This has been improved quite a bit in Windows 8, so I would suggest upgrading if possible, otherwise
I would suggest recording to MPEG-2 instead.
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MP4 impact on the CPU has been improved in Windows 8 over Windows 7? Is the difference noticable?
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Hi Martin,
i bump this topic because of the "use hardware encoder" option in MP4 local recording.
Can you make a statement about it because the requirements are not really clear. Nothing in the documentation, nothing in the forum.
I thought it uses Quick Sync, but my i7 3770K is Quick Sync compatible (works well with OBS and Action! Capture) and still uses up to 80% CPU in vMix.
BTW why can't we use FFmpeg for local enconding if we can't have hardware acceleration ? it seems to use far less CPU.
Thanks.
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I am putting this here instead of starting a new thread. I have ordered a Blackmagic Design HyperDeck Shuttle 2. Has anyone used these with good success? I was thinking I could record to this and keep from affecting performance of the vMix. I only ordered one. I wanted to use this to record the vMix ouput. Any thoughts or insight will be appreciated.
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Hi,
I use the original shuttle and it works great for me. In addition to taking the recording load off the vMix System, it functions as a 'converter', as it has both SDI and HDMI ins and outs. It records ProRes format at very high quality. My workflow is output from vMix -> input of shuttle -> input of Encoder (Teradek or Vidiu).
Maxi
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 1 user thanked Maximus for this useful post.
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