Function copy_packets 

pub fn copy_packets(
    copy: &PacketCopy,
    output: impl Into<OutputTarget>,
    container: Container,
    audio: CopyAudio<'_>,
    cancel: &CancelToken,
    progress: &mut dyn FnMut(u64),
) -> Result<PacketCopyReport, EncodeError>

Writes copy’s runs back to back into a new container file at output, with audio. The runs were planned for container (PacketCopyRequest::container).

The output is transactional and renamed into place only when complete. Encoded audio is written slightly ahead of the video so neither stream piles up in the muxer. progress receives the video packets written.

Errors

Returns an adapter failure for an existing output, a partial a running export holds, a read or write failure, a failed mix, audio the plan does not copy, or a cancel.