Epiphan Pearl - Manual (Page 6)

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Encoding video at 60 fps with either 16 mHz or 22 mHz AAC audio can result in some dropped video
frames.
Workaround: Select another video frame rate, a different audio sampling rate, or choose MP3 audio.
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The automatically calculated frame size for HD VGA sources is occasionally incorrect.
Workaround: This problem is caused due to cable degradation or poor cable connection. Re-seat or
exchange your VGA cable. If the problem is still not resolved, visit the Epiphan Pearl support page for a
custom EDID to resolve the issue.
Affecting streaming and recording
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Output from the Auto-A and Auto-B sources (in the auto channels or in channels using these inputs on
a layout) can sometimes flicker to another source plugged into the same row (e.g. from HDMI-A to
VGA-A and back to HDMI-A).
Workaround: Use specific sources in your layouts, or keep only one item plugged into row A and one
item plugged into row B.
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When switching layouts while streaming or recording it's possible to have a small number of frames
(approximately 100ms worth) repeated in the stream or recording file, and over the same time period a
small number of frames from the new layout skipped.
Workaround: If dropped frames are problematic for your application, avoid the layout switching
feature.
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CPU is under high load when rotating a source through the sources configuration menu.
Workaround: If possible, manually or programatically rotate the source image (e.g. rotate the camera
or use the source's software settings) instead of rotating via the streaming system's configuration
pages.
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If the hard drive runs out of space when recording a video, recording may fail.
Workaround: Use Automatic File Upload to configure your system to automatically offload and erase
recordings as they are made. See
File and recording transfer for more details.
Affecting the web interface
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It is possible to name two or more channels with the same value. Use of automatic file transfer and
UPnP is unpredictable if this occurs.
Workaround: Ensure each channel has a unique name.
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The automatic file upload (AFU) file queue shows a maximum of 15 files, Newer 15 and Top of the list
buttons do not work. All files are transfered, even though they are not lists.
Workaround: Wait for the queue to have fewer files in the list.
Affecting other areas
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Pearl fails to restart after improper shutdown (power cable removed or rapid power cycle). LED and
touch screen blink.
Workaround: Restart Pearl by removing the power cable for 20 seconds, then reattaching the cable
and powering the system back on.