Latest post Wed, Apr 24 2019 4:53 PM by DIESELE. 3 replies.
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  • Tue, Apr 23 2019 6:59 PM

    FrameFlex causes performance issues

    I want to share with everybody something that I just discovered. Call it a bug or call it a feature that doesn't perform as expected. Basically, in a short sequence where a lot of the clips have FrameFlex applied to them, Media Composer takes a serious performance hit. I have a 9-minute sequence in an HD 1080p project where the footage is pretty evenly split between DNx36 and NTSC 3:1 media. Almost all of the clips have FrameFlex applied to them and there is a major lag/delay that I experience when I edit clips into the timeline--that is, until you render the timeline. 

    I started experiencing this lag, and it was happening on other workstations as well, Mac and PC. So, I knew it wasn't the computer and it wasn't the storage (I sent the sequence off to somebody else who had another copy of the media and he experienced the same lag on an older version of Avid). I'm running 2018.12.3. He is running 8.9.5. 

    I narrowed down that it was FrameFlex causing the problem by first, creating a new sequence and cutting in footage. No lag initially. Then I started cutting in pieces of footage from my original sequence. I kept doing this until I had built out a test sequence that was longer than my original one. This sequence also had some Boris and Sapphire plugins in it. I ruled that out as a culprit as well. The lag/delay became particularly bad when the sequence got longer. 

    After rendering the entire sequence and the green "realtime" dots on the FrameFlex clips went away, everything behaved normally. 

    So, my recommendation to everyone is, if you can help it, AMA/Link to your footage, apply FrameFlex to them, then transcode the clips, baking in the formatting on transcode so that you don't run into these performance problems. 

    I hope this is helpful to you all. 

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  • Tue, Apr 23 2019 9:04 PM In reply to

    Re: FrameFlex causes performance issues

    Its worth noting that Frameflex, Source colour adapters and others are all realtime effects so yes there will be a perfomance hit if they are unrendered.

    If you need realtime playback then experimenting with the media cache is a good start (if you have plenty of RAM)

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  • Wed, Apr 24 2019 1:08 AM In reply to

    • jef
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    Re: FrameFlex causes performance issues

    Damien LeVeck:

    So, my recommendation to everyone is, if you can help it, AMA/Link to your footage, apply FrameFlex to them, then transcode the clips, baking in the formatting on transcode so that you don't run into these performance problems. 

    Burning in the Frameflex setting works for some, but ultimately defeats the purpose of greater than final raster size source clips.

    Really, Avid's media processing is not as effecient as some other systems.

    Jef

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  • Wed, Apr 24 2019 4:53 PM In reply to

    • DIESELE
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    Re: FrameFlex causes performance issues

    I use Frameflex daily and cant say I have hit any unexpected performance hit - sure things move a little more slowly on UHD media at 300Mbps v HD at 100Mbps, but its perfectly workable.  Can just about play a colour corrected Frameflexed UHD clip in real time...  And a caption on top too on a good day!  I work in 1920x1080 25P on 25P UHD sources.

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