Your files stay on your Mac.
MPEG-TS (.ts) is the container used by broadcast TV tuners, DVRs, and Blu-ray capture cards. Converting to iTunes M4V wraps the video in an Apple-compatible container that plays natively in iTunes, Apple TV, and iOS. Convertessa does the entire repack on your Mac — files never leave your machine.
Drag one .ts file or an entire folder of transport streams into Convertessa. Batch mode processes every file in the folder in a single pass.
Choose iTunes M4V from the output list. Because M4V uses lossy encoding, use the quality slider to tune the balance between file size and visual fidelity.
Click Convert. Convertessa runs entirely offline — your .ts files are processed locally and the finished M4V files are saved alongside the originals.
Images, audio, video, documents, archives and eBooks — all converted natively, right on your Mac.
Pick a format you have — see everything Convertessa can turn it into.
Convert hundreds of files at once with per-type group defaults and individual overrides.
First-class support for HEIC, AVIF and WebP — encode and decode, both ways. Read JPEG XL and a dozen more modern formats too.
Drop files anywhere on the window. Native, instant, and exactly what you’d expect on a Mac.
Dial in compression, resolution and bitrate. Keep originals pristine or shrink for sharing.
Never overwrite a file by accident. Convertessa appends safe suffixes automatically.
Every job is logged locally. Re-run a previous conversion or revisit recent outputs in a click.
Bundle your converted files straight into a single ZIP, TAR or 7z — packaged and ready to share the moment a job finishes.
Right-click any file in Finder and choose Convert. A Quick Action handles it on the spot — no need to open the app first.
Shrink Convertessa to a tidy mini window that tucks into a corner — just a drop zone and a format picker for quick, one-off conversions.
No cloud. No account. No upload. Every conversion happens entirely on-device, using the power already in your Mac. What you convert is nobody’s business but yours.
Script conversions, wire them into your build, or batch a folder from the terminal. The same engine, no GUI required.
Read the full CLI documentation →Shrink Convertessa down to a small, focused window — drop, convert, done, with your recent conversions one click away.
macOS 14+ · Apple Silicon & Intel
New formats, new features, and fixes — every release, on the record.
Yes. iTunes M4V uses H.264 video and AAC audio inside an MP4 container. Convertessa encodes your MPEG-TS stream to match that spec, so the output file opens in iTunes and syncs to Apple devices without any additional steps.
Yes. Embedded metadata is stripped during conversion, so the M4V contains only the video and audio tracks.
Yes. Drop the entire folder into Convertessa, or run convertessa /path/to/folder --to m4v in the terminal. Every .ts file in the folder is converted in one batch.