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MP4 is choppy when playing in Wirecast

We had a video that we imported into Wirecast. The video is an MP4 format and plays just fine outside of Wirecast. When we import this into Wirecast, the video is very choppy and doesn't align with the audio. 

We tried converting this to another format but seems that none of the other formats are working with Wirecast. My question is this, what is the best format to use with Wirecast and what kind of video codec would be recommended? Is there also some settings that we need to change once the video is imported? We have used the stock videos within Wirecast and those are working just fine. 

Any information would be greatly appreciated and helpful. 

Thanks!

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  • I'd love to help but I need technical information.

    Wirecast 13.1.1?

    What OS?

    What Computer Specs?

    MP4 is a container which can contain any number of codecs, how was the file create?

    What is the frame size?

    What is the file's data rate?

    You mention "plays just fine outside Wirecast" what did you play it in?

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  • Wirecast 13.1.1? Yes

    What OS? Windows 10

    What Computer Specs? Intel Core i5 6200U CPU 2.30GHz with 8GB RAM 

    MP4 is a container which can contain any number of codecs, how was the file create? not sure as I received the file via a Google Drive link and downloaded it from there. I know that my co-worker received two MKV files that he merged together using a movie maker software. 

    What is the frame size? 2160h x 3840w

    What is the file's data rate?19077kbps

    You mention "plays just fine outside Wirecast" what did you play it in? Played it in the default Windows 10 Movie's and TV app. 

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  • Nick Anderson said:
    What is the frame size? 2160h x 3840w
    What is the file's data rate?19077kbps

     These are on the large side. Keep in mind Wirecast is decoding this and all other sources in real-time for live streaming.

    If you're streaming 1080p you can easily use 1920x1080 source at about 5000kbps H.264 give or take 
     

    Nick Anderson said:
    Intel Core i5 6200U CPU 2.30GHz with 8GB RAM 

     And that would further compound the problem a 6th generation i5 may not be up to the task for the file sizes you're using.

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  • Thanks for the info. This video is done for right now, in other words we are not needing this again for anything. What is a good file size that videos should be at? Are their best practices that we should be following when doing a video for Wirecast? 

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  • Nick Anderson Ideally an Apple ProRes file would be easier to playback but much larger file size. ProRes LT or Proxy would get you the smallest file sizes in that family.

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  • does the video size affect the playback as well? like if it's render in 4k or 1080p. what is the recommend size for it? i have tried with both 1080p and 720p video. 1080p video makes it choppy while as 720p video seems pretty smooth.

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  • jing lie A larger video may require more system resources to play. So smaller would be easier. Your file frame size should ideally match the canvas and encoder frame size.

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  • so ProRes lt would play better than h264? Because it is less compressed?  Less work for computer?

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  • Michael day 

    Michael day said:
    so ProRes lt would play better than h264? Because it is less compressed?  Less work for computer?

    Thats the theory.... but only if there is no alpha channel graphics in the ProRes file. Previous bugs have been submitted documenting issues with alpha channel performance impact, but no feedback has yet been received if or when this bug will be fixed. WIRE-15021

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