Epiphan Networked VGA Grid - Manual (Page 5)

iv
issue. If possible, avoid using wide-mode for VGA displays that exhibit this issue.
l
When changing a channel's source from a local encoder source to an external encoder source, it's
possible to have an AAC audio encoding bitrate that is higher than the VGA Grid HD Encoder supports.
The resulting stream or recording may be unplayable and you may encounter a warning about variable
audio bitrate.
Workaround: When changing from local to external sources, delete the channel rather than changing
the source(s). Or, if re-using channels, ensure audio encoding bitrate for VGA Grid HD Encoders is set to
no more than 160 kbps.
l
Recordings made with encoded streams from VGA Grid HD Encoders, using AAC audio and AVI file
format are not playable via VLC.
Workaround: Use another media player, such as Windows Media Player; choose a different audio codec;
or save recordings as .MP4 or .MOV files.
l
Some cameras are sensitive to EDIDs and are not captured at optimal settings. When capturing from
these cameras, the HD signal may be down-sampled by the camera to an SD signal because the Epiphan
system doesn't share the EDID the camera expects for its HD signal.
Workaround: Contact Epiphan customer support for a custom EDID to resolve this issue.
l
Limitation: When audio is enabled on an SDI source where video is already being captured, it takes up
to 15 seconds for the system to detect the audio. Once detected, the audio is properly synchronized
with the video.
Workaround: Start the SDI signal with audio enabled, or check to ensure audio is detected before
streaming or recording.
Affecting streaming
l
You may see video artifacts when creating multiple source layouts where sources are partially
overlapped.
Workaround: Avoid overlapping sources in multiple source channels or disable the Keep Aspect Ratio
parameter.
Affecting recording
l
You may see video artifacts when creating multiple source layouts where sources are partially
overlapped.
Workaround: Avoid overlapping sources in multiple source channels or disable the Keep Aspect Ratio
parameter.
Affecting the web interface
l
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.
l
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.