Overview
Transmuxing is the process of changing the format of a video or audio file while preserving some or all of the streams from the original file.
Today, Zencoder can transmux H.264 video and AAC/MP3 audio tracks from MP4/MOV formats to MP4/TS (including creating fragmented MP4 or segmented TS output). There are, however, a number of requirements that must be met by the input files to transmux properly:
Video
- MP4/MOV container format
- H.264 codec
- No b-frames used
Audio
- MP4/MOV container format
- AAC or MP3 codec
Segmenting/Fragmenting
- Maximum GOP should be less than or equal to the segment duration
- HE-AAC-V2 may not be used
Other
- Most encoding options have no effect on transmuxed files because the streams are not being re-encoded
copy_video
copy_video:Boolean
API Versions: V2
Parent: output
Default: false
Valid Values: true or false
Compatible Job Types: VOD
Example: true
Description:
Specifying copy_video will take the video track from the input video file and transmux it into the resulting output file.
{
"input": "s3://zencodertesting/test.mov",
"outputs": [
{
"copy_video": true
}
]
}
copy_audio
copy_audio:Boolean
API Versions: V2
Parent: output
Default: false
Valid Values: true or false
Compatible Job Types: VOD
Example: true
Description:
Specifying copy_audio will take the audio track from the input video file and transmux it into the resulting output file.
{
"input": "s3://zencodertesting/test.mov",
"outputs": [
{
"copy_audio": true
}
]
}