
Audio File Type: For streaming formats, like QuickTime and MXF, the Audio File Type menu is automatically set to the Video File Type. There
may be situations in which you require a separate audio stream. For example, if you export the video stream as a DPX file
sequence, you can select a standalone audio file format (.aiff, .wav, .mp3, etc.).
The supported standalone audio formats are:
- AIFF-C
- AIFF
- Nextsnd
- MP3
- WAVE
- Broadcast Wave
- Berkeley/IRCAM/CARL Sound (BISCF)
- Audio Visual Research (AVR)
Compression:Use to select the audio compression settings. Options are:
For QuickTime: (Only 16-bit is available. There are no options in the UI.)
- Alaw
- ima4
- Linear PCM (QT 7)
- Mpeg Layer 2 Audio
- Sowt
- Twos
- Ulaw
For MXF:
- 16bit Linear PCM
- 24bit Linear PCM
Sampling: Use to define the sampling frequency of exported audio files. Options are:
- Native
- 11Khz
- 22Khz
- 44.1Khz
- 48Khz
Lustre's behavior when exporting audio depends on the type of render mode selected. To export media files with audio, Lustre
uses the grade-based audio file when the Media Origin is set to OneSequence. If you select Source Grade or Original Media
and you are working with media files that contain audio media, such as Quicktime, MXF, R3D, the exported audio will come from
the source media files.
Summary:
- Source Grade Renders: Lustre uses the source audio of each clip for the render and re-encodes it to the selected format.
- One Sequence Renders: Lustre uses the timeline's audio and re-encodes it as one multi-channel audio track (the number of channels depends on the
selected output format).
- Original Media: Lustre uses the source audio of each clip for the render and re-encodes it to the selected format.
Note
- You must select an audio output format that supports the number of audio channels you are exporting. For example, if you are
exporting a four channel audio file to mp3, channels 3 and 4 will be discarded during the encoding as the mp3 format only
supports up to two channels.
- When exporting audio, Lustre will re-encode to the bit depth of either your source audio or your timeline audio, based on
your export mode, as long as the selected output format supports that bit depth. If it does not support the bit depth, the
export defaults to a lower bit depth, supported by the selected output format.