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Buffering

Usually just:out buffers between less than half a second and three 0.5 and 3 seconds of the final uncompressed final output uncompressed in the RAM – to make sure the playout can continue without dropping frames even under bad conditions. A bad condition usually has two reasons:

Bad Conditions

• Case 1: The storage system is not fast enough to deliver the required data. This could happen because (1) because…
  • the disk is getting full
  (2)
  • heavy copying of files
  (3)
  • many users access the same storage system at the same time
  (3)
  • the file system is heavily fragmented.

• Case 2: The GPU isn't able to render the content fast enough, because the current graphic is too complex. Remember that real time graphics can put heavy load on the CPU, GPU and the file system – especially if they read out dozens of data sources at the same time.

In both cases the just:out pipeline buffer will be quickly exhausted (the buffer status will decrease and turn red) a buffer underrun may occur and eventually just:out will begin to drop video frames. To guard against this, just:out will automatically "eject" the most recently started graphic if the

Auto Eject

If the pipeline buffer reaches a critical state and stays there for half a second or longer. Further, if ejecting the graphic more than 0.5 seconds just:out will automatically eject the most recently started graphic. If this does not result in the pipeline recovering to a non-critical state then all non-in nite infinite graphics will be automatically ejected. We recommend that you test

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Visual Representaion of the Buffer

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