Messaging
In the context of "picture-to-sound", in relation to "sound-to-picture", the aim of a video may differ, since the focus may be primarily on performance, rather than messaging.
Video
Synchronisation
Subtitles, are synchronised in reference to "singing", as generated by vocalising software, the timing of which is ascertained by viewing waveforms in an audio editing application and determining where vocal phrases start and finish, with intersecting vocals prioritised.
Editing
A (mastered) stereo audio file is loaded onto the timeline of a video editing application, with timing references in the form of 00:00:00.000, via Web Video Text Track (WebVTT) files. Chapters or cues are included in separate VTT files, using the .webvtt extension.
Imaging
Each subtitle has beginning and end handles, that images can be snapped to, as designated by video editing software, whereby image display can be started or stopped at certain times, or shown for a certain length of time, as well as faded for effect.
Rendering
Once the audio and subtitles are imported, still images are included, in addition to a title image. The MPEG-4 format serves as a container for audio and video data; however, audio quality is inferior to that of the Compact Disc (CD) format, due to inferior audio conversion.
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