By: Michael Lynch <git@mtlynch.io>
Transcode uploaded videos from disk without re-spilling An uploaded video is already streamed to a temp file before processing, but writeFullSizeVideo passed it through the stream-based Converter, which spills the reader to another temp file before ffmpeg runs. For a multi-gigabyte upload that doubled the source on disk (plus a redundant copy of the WebM output). Add convert.VideoFileToWebM, a path-to-path transcode, and have the video upload path transcode directly to a temp WebM file and write that, skipping mediastore.WriteConverted. The importer keeps the reader-based VideoToWebM because its sources come from an fs.FS rather than a local path. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>