Overview

Composite recording mode generates one M3U8 file and multiple TS files which include the audio and video of all UIDs in a channel. You can use FFmpeg to convert an M3U8 file to MP4 or use Agora's Format Converter script to batch convert multiple TS files into MP4 or audio formats.

Convert using FFmpeg

You can use FFmpeg to convert an M3U8 file to MP4. Install FFmpeg and run the following command:

ffmpeg -i input.m3u8 -vcodec copy -acodec copy -absf aac_adtstoasc output.mp4

Where input.m3u8 is the name of the M3U8 file to convert, and output.mp4 is the name of the MP4 file to output. For more information about the parameters used in this example, see the FFmpeg Documentation.

Convert using the script

You can use Agora's Format Converter script to batch convert TS files to MP4 or audio formats, including MP3, WAV, and AAC.

Prerequisites

Recommended systems for transcoding:

  • Ubuntu 14.04 and later x64
  • CentOS 6.5 and later (7.0 recommended) x64

To run the script, you need to install FFmpeg and Python 2, version 2.7 or later.

File preparation

Ensure that the recorded files are stored in an accessible directory.

Transcoding steps

1. Get the Format Converter script

Download the Agora Format Converter script and decompress it.

2. Execute the Format Converter script

Use the following command:

python format_convert.py <directory> <source_format> <destination_format>

Where:

  • directory: Directory of the source files.

  • source_format: Format of the source files. source_format must be in lowercase:

    • Audio: mp3, wav, or aac.
    • Video: mp4 or ts.

  • destination_format: Format to which you want to convert the source files. destination_format must be in lowercase:

    • Audio: mp3, wav, or aac.
    • Video: mp4 or ts.

When you run the command, the script will search for all files in the specified format in the directory and convert them to the target format. The converted files have the same name as the source files, except for the suffix.

Example

To convert all the MP4 files under /home/testname/testfolder to TS format, use the following command:

python format_convert.py /home/testname/testfolder/ mp4 ts