HELO H.264 Streaming and Recording Encoder v1.1r1 38 www.aja.com
Slices Per Frame (Advanced Settings)
Selects the number of encoding slices per frame. Options are:
• 1 - (factory default)
• 2
• 4
• 8
If Slices Per Frame is greater than one, video will be encoded in a way that allows
parallelized decoding. If the decoder is sufficiently powerful, it can decode 2, 4, or
8 sections of the frame simultaneously.
Entropy Coding (Advanced Settings)
Selects the algorithm used for entropy encoding.
CABAC - (Context Based Adaptive Binary Arithmetic Coding) (factory default)
CAVLC - (Context Adaptive Variable Length Coding). CAVLC is generally easier
to decode, but can offer reduced image quality. CAVLC is always used when
Constrained or Baseline H.264 Encoding Profiles are selected.
Display Aspect Ratio
Selects whether the input video should be coded for playback on a display device
with a specific aspect ratio.
Auto - (factory default)
4:3
16:9
Recording Media Type
Selects whether recordings go to SD Card, USB, or a CIFS or NFS Network file
share. CIFS shares are commonly used on Windows servers. NFS shares are
commonly used on Unix-style servers, such as Linux and Mac OS X.
SD - Record to the media inserted into the SD Card slot (factory default).
USB - Record to the media connected to the standard size USB Storage port.
CIFS Network Share - Record to Windows shares (CIFS and SMB).
NOTE: To tell if the CIFS server is writable, HELO writes a test file to the remote server,
then deletes it. If the process works, HELO knows that the server is writable.
However, it is possible to configure the server to allow HELO to be able to write
files, but not delete them. If you are seeing numerous test files on your CIFS server,
check your server configuration to make sure that HELO has both write access
and delete access.
NFS Network Share - Record to Network File System for Unix-based systems
such as Linux and Mac OS X.
NOTE: When using NFS Network Share, make sure that you take into account any file
size limits on your file system. Configure your HELO so that it doesn't make file
sizes that your storage system cannot handle. For example, you can restrict
the maximum file size by adjusting the bit rate, frame rate, and setting limits of
duration so that clips will not be bigger than 4GB or 2GB.
SD Card/USB Record Path
Defines a path (or directory name) for the recording location on an SD card or
USB stick. Recordings will always be placed inside an /AJA directory. Use forward
slashes to create paths for subdirectories. For example, to create the path: "AJA/
project_name", enter the following into the SD Card/USB Record Path field:
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