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API > API/Plugins > API/Plugins/MP4Muxer > API/Plugins/MP4Muxer/IMP4RawMuxer
Description
Adds a track to be written. Returns a track index used during muxing or -1 if the track cannot be added.
| Name | AddTrack |
| Type | function |
| Header File | /Engine/Plugins/Media/MP4Utilities/Source/MP4Muxer/Public/MP4Muxer.h |
| Include Path | #include "MP4Muxer.h" |
int32 AddTrack
(
const FTrackSpec & InTrackSpec
)