Your files stay on your Mac.
MPEG-TS is a transport stream container used for broadcast recordings, IPTV captures, and digital TV output. Converting to AAC pulls the audio track and re-encodes it as Advanced Audio Coding — a lossy format supported by phones, tablets, browsers, and streaming apps. Set quality to balance file size against audio fidelity.
Drag a single .ts file or an entire folder of recordings into Convertessa. Everything stays on your Mac — nothing is uploaded.
Select AAC from the output format list. Set quality to control how aggressively the audio is compressed.
Click Convert. Convertessa extracts and encodes each audio track in place, leaving your original .ts files untouched.
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.
Convertessa converts the primary audio track found in each .ts file to AAC. Drop your files in and Convert — no additional setup needed.
No. Convertessa writes new .aac files alongside your originals and never overwrites the source.
Yes. Drop the folder onto Convertessa or run convertessa /path/to/folder --to aac in Terminal to batch-convert every .ts file inside.