Create separate audio file using a video

As more people consume their media from more devices, it becomes important to have your content available across multiple mediums to make it easy for your users to consume. Often times, your audio can be an important part of your video which can be streamed separately from the video.

Using Qencode, you can easily create separate files using the audio tracks in your videos.

To create an audio output from a video, set the value of the output attribute in the format object to the format of the audio ouput (example: "mp3").

You can also can just use an audio file as the input or source.

Example:

{
 "output": "mp3",
 "audio_bitrate": 192
}

You can also create HLS outputs with a single audio stream, set the value of the output attribute in the format object as "hls_audio". You also can use audio-only input as a source.

Example:

{
 "output": "hls_audio",
 "audio_codec": "libfdk_aac",
 "audio_bitrate": 128
}

You can fine tune audio settings using the following attributes as part of the format object. You can find a list of attributes below:

audio_codec	optional Output file audio codec. When creating audio only outputs you can specify this for HLS audio outputs only. Defaults to aac. You can also use libfdk_aac which stands for Fraunhofer FDK AAC.
audio_bitrate	optional Output file audio bitrate value in kbps. Defaults to 64.
audio_sample_rate	optional Output file audio sample rate. Defaults to 44100.
audio_channels_number	optional Output file audio channels number. Default value is 2.

Currently, the following formats are available for audio outputs: MP3, HLS audio (HLS with a single audio stream).

Similar to video, you can customize any of the audio attributes like audio_bitrate, audio_sample_rate, and audio_channels_number.

Example

{
  "output": "mp3",
  "destination": {
    "url":"s3://s3.us-east-1.amazonaws.com/yourbucket/output.mp3",
    "key":"abcde12345",
    "secret":"abcde12345",
    "permissions": "public-read"
  },
  "audio_bitrate": 128,
  "audio_sample_rate" : "44100",
  "audio_channels_number" : "2"
}

Creating audio clips with start_time and duration attributes is also supported.