MP4 Muxing

MP4 is an ISO Base Media File Format container commonly used for H.264/AVC, H.265/HEVC, AAC, and other compressed streams. Muxing combines already encoded audio and video streams into a single playable MP4 file with synchronized timing and container metadata.

These samples show how to mux AAC audio and H.264 video into an MP4 file with TTranscoder::run, optionally with fast start (progressive download).

• Mux Audio and Video Into MP4 - Mux AAC audio and H.264 video into an MP4 file with TTranscoder::run.

• Mux Audio and Video Into MP4 With Fast Start - Mux AAC audio and H.264 video into an MP4 file, or remux an existing MP4 file, with the MP4 FastStart muxer parameter set so the file can play while downloading.