Affecting encoding
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Limitation
: When Pearl Mini is overloaded, video frames or audio samples can be dropped causing
variable frame rate and audio cracks.
Workaround
: Pearl Mini is a powerful system capable of many simultaneous tasks, but like any other
computing device, it has finite resources. If this problem is observed, check the CPU load from your
system's Info page.
To reduce system load, do any of the following: disconnect unused video displays from Pearl Mini's video
output ports, delete unused channels and unused layouts, or reduce the complexity of layouts by scaling at
the source instead of having the system scale, or reduce the number of sources in layouts, or reduce the
frame size or frame rate for channels displayed on the video output ports. Note that actions performed in
the Admin panel and Epiphan Live can increase overhead (such as adding channels/sources to Epiphan
Live's Dashboard preview panels), as can switching layouts via Pearl Mini's touch screen.
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Configuring very low frame rates such as 1 fps encoding with a high bitrate setting (e.g. 7000 kbps) results
in poor video quality.
Workaround
: Allow Pearl Mini to automatically select the best bitrate setting. For 1 fps, this results in a
bitrate of about 1180 kbps.
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Some audio distortion is heard on the video output port when the channel encoding is set to1 fps.
Workaround
: For best results, encode the channel at 5 fps or higher.
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Occasionally, a solid black image appears when connecting an AV.io HD capture card to a USB port on
Pearl-2.
Workaround
: Reconnecting the capture card resolves the issue and captures the video normally.
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The GoPro camera model HERO7 and some Evertz video distribution systems can suddenly stop working
with Pearl Mini.
Workaround
: Reset the EDID for the Pearl Mini input. You can also use a device such as an HDMI splitter to
isolate and filter the video signal before the signal is sent to Pearl Mini.
Affecting streaming and recording
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Interlaced SDI capture is sometimes shifted downwards, resulting in a small green line at the top of the
video.
Workaround
: This issue varies with different sources. If it is affecting your capture, the best solution is to
crop out the green line in your layout.
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AFU to Amazon Web Services S3 Simple Cloud Storage transfer sometimes does not recover after the
network connection is cut. The expected behavior is that the file transfer would restart, but there is
sometimes a time desync that results in a failed transfer.
Workaround
: If the network connection is severed during a AFU transfer, the process must be restarted
from the beginning, and the transfer must proceed without interruptions to the network.
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In the current FTP session, the
FTP Delete
command continues to work even after the
Disable FTP Delete
setting is applied using the Admin panel.
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Occasionally, tracks won't extract from a 64 GB .AVI multi-track recording using the Admin UI.
Workaround
: Perform the extraction again.
