Verifying MP4 test streams on a local disk

This example describes how to verify that Dolby Digital Plus bitstreams are correctly multiplexed into the MP4 format. The multiplexed MP4 files for testing are stored on a local disk.

Procedure

  1. Locate the test stream, and then copy them to the same directory that contains MP4Validator.
    Input test signals Description
    ChID_voices_51_256_ddp.mp4 MP4 files multiplexed from one pair of video and audio streams
  2. Run this command: 
    mp4validator --input ChID_voices_51_256_ddp.mp4 --output-folder tmp > logfile.txt
  3. The verification process generates the files listed in the table.
    Output files Descriptions
    tmp\out_2.h264 H.264 file output from MP4Validator, named using the convention out<_TrackNumber>.h264
    tmp\out_1.ec3 Dolby Digital Plus file output from MP4Validator, named out<_TrackNumber>.ec3
    logfile.txt Log file
  4. Verify the logfile to ensure that no errors are reported by the tool.