Export is possible through The “File -> Export Composition” menu to export the Composition Result, or by right clicking on an interval in the Timeline and choosing “export” to export the Track Result up to that interval’s Stage.
When an Export is executed, HoloEdit outputs any relevant stream data present for each export type specified.
Export Best Practices¶
Due to the nature of Volumetric Video clips, HoloEdit exports can be time consuming or hardware intensive. To ensure a fast and smooth export process, we recommend following these guidelines:
Avoid Exports into your HoloEdit Workspace. Exporting directly into a folder or subfolder of your HoloEdit Workspace is not supported. Because a considerable number of frames will have to be indexed by HoloEdit for import simultaneously, doing this can lead to poor performance or HoloEdit crashes. If you are exporting data for the purpose of re-import back into HoloEdit, take care to export to a separate directory, and then move those output files into a new folder in your Workspace after HoloEdit has completed the export process.
Ensure Available Disk Space. Before any large export, confirm the available disk space on your computer. Even while exporting to compressed output formats such as OMS, free disk space is required to prepare and export your clips. We recommend keeping several dozen gigabytes of disk space available at all times. At minimum, keep at least as much free disk space as your original source files required. For more information on HoloEdit hardware requirements, see the System Requirements section.
The OMS Format¶
HoloEdit provides its own export format for volumetric video compression and playback, called OMS. The OMS format is always recommended as the final output for a volumetric Composition, with playback targets for web, streaming, and popular game engines for local playback. In addition to OMS, there are several other output formats available in HoloEdit.
OMS supports the following unique features:
The OMS format provides fast and compressed playback of any volumetric capture. OMS compression includes the following optional features
Temporal Compression: Temporal compression uses SSDR data with a stabilized clip’s Segments to greatly reduce file size on exported OMS files. This compression is applied automatically to all OMS exports containing SSDR data.
Mesh Compression: Mesh Compression provides lossy methods of storing a mesh frame with a smaller footprint using bitpacking, ordering, and other encoding tricks. Enabled with the “Bitpacking’’ option in the OMS export options.
Sequence Bytestream Compression: Sequence Bytestream Compression is an additional layer of compression automatically applied to OMS exports. It uses Bytestream compression techniques such as zStd or zLib on a per sequence basis to save additional space.
Animation Retargeting, usually referred to as “Retargeting”, is a process that allows dynamic animations to be added during OMS Playback.
One common usage of Retargeting is “Head Retargeting”, using the head bone to make the volumetric actor look at an animated object or camera in the scene during playback.
In HoloEdit 2021.2 the Head Retargeting workflow is supported through the Generate Skeleton and Generate Skin Weights For Head Retargeting stages, which provide the tools to automatically re-direct a Volumetric Actor’s gaze during playback. The OMS format supports all necessary Skeletal and Skinning data for playback with Retargeting.
In HoloEdit 2021.2, simultaneous export of multiple Tracks is supported through the Combined MP4+OMS output type. All other Output types export the Track Result of the uppermost Track in your current Composition.
The “Export Final Composition” Window¶
The Export Final Composition window lets you specify one or more output types and export them in a single step.
The Export Final Composition window is made up for two parts – the Shared Export Settings, and the Export Sequences area:
The “Export Sequences” Field¶
The Export Sequences field makes up the majority of the Export Final Composition window. It is made up of a large list view, with a “ + “ button at the top right. The + Button will open the “New Output Sequence” window. The list view contains all of the output sequences specified for export. Every output present in the list view will be exported together when you press the “Export” button at the bottom right of the window.
The “New Output Sequence” Window¶
The New Output Sequence window is made up of 3 parts:
The Output Sequence Filename Field¶
The Output Sequence Filename Field is the text field at the top left of the window. The specified string will be used to determine the naming scheme for your output files.
Along with letters, numbers, and some symbols, certain symbols can be used to configure how HoloEdit numbers individual files exported in single-frame formats like .obj, .png, or .ply.
Supplying a name with no special characters, such as “filename” will place the frame number at the end of the name. The frame number will be “zero padded” to four digits. For example, “filename0001.obj”, or “filename0525.obj”. Frame numbers longer than 4 digits will not have any padding, such as “filename34556.obj”.
Supplying a name with the “#” character anywhere in the name will determine where the frame number is placed. For example, “file#name” will place the frame number where the # character is located, such as “file0012name.obj”.
Supplying a name with more than one “#” character in a row, such as “filename##”, will override the default four digit padding and pad to the number of # characters. For example, “filename04.obj”.
Finally, supplying a name with a “#” character followed by a “!” character will insert the frame number at that location with no padding, for example “file#!name” could produce “file1name.obj”.
If you wish to include “#” or “!” characters in your name, you can ‘escape’ them by providing a leading “\” symbol. For example, “file\#name” will be treated as the name “file#name” with no special characters, and export files like “file#name0001.obj”. Or “filename\#_###” will produce files like “filename#_045.obj”.
Attempting to provide more than one non-adjacent “#” character will prompt you to correct the name.
The Output Sequence Type Selector¶
The Output Sequence Type drop down on the right specifies the kind of output to be exported.
The rest of the window consists of the Output Parameters. These vary per Output Type. See Output Sequence Types for details.
After configuring your New Output Sequence, press the “Save” Button at the bottom of the window to add it to the Export Sequences List. You can add as many individual Export Sequences as you’d like before pressing Export in the Export Final Composition window to begin the export process.