Convert Incompatible Media

When Sequence prepares media

Some files use a container or codec that is unreliable for macOS playback or audio processing. When preparation is required, the project shows Media Compatibility.

Sequence tracks the prepared file alongside the original source. This preparation is shared by the media item’s variants; it is not a separate edit or a new transcription.

Remux first

With automatic codec, bitrate, and container settings, Sequence tries a remux before conversion. Remuxing puts the existing video and audio streams into a compatible container without re-encoding, so it is usually quick and avoids a generational encode. Explicit bitrate or codec choices, or a MOV output, request a transcode instead.

If remuxing succeeds, the project uses the remuxed file for compatible playback and export. Your original media remains available unless you have explicitly enabled the setting to delete originals after remuxing.

When conversion is needed

If remuxing cannot make the file usable, Sequence can transcode a compatible version. The output container and codecs depend on the conversion settings; do not assume every conversion produces the same MP4. Conversion takes longer because media is re-encoded.

A converted compatibility file can contain only the first video and audio streams, unlike a source-preserving remux. Remux preparation also excludes subtitles and attachments. Keep the original recording when you need its other streams or embedded extras.

You can keep working in Sequence while conversion runs. Long-running work appears in the Action Center, and if you enable system notifications Sequence can notify you when the job finishes.

Conversion preferences

In Media Compatibility, choose video quality, video codec, audio codec, and container. Leave quality on Auto to use source-based settings, or choose a preset or custom bitrate. Codec and container choices constrain each other; for example, audio that requires MOV disables incompatible container choices.

Conversion preferences also include remux defaults, MP3-to-M4A conversion, and the option to delete originals after successful preparation. That last setting is destructive. Leave it off unless the original files are backed up and you are certain they are no longer needed.

Managing prepared files

Prepared media appears in Metadata with badges such as Remux or Converted. If the file moves or loses access permission, use relinking rather than starting a second project or repeating conversion. The inspector also provides delete actions for remuxed and converted media; read the confirmation before removing a prepared file.