FastCast v0.5.1 adds command-line recording control: start and stop recording from scripts, Stream Deck buttons, or schedulers while FastCast is running. Recording, streaming, capture, and audio behavior are unchanged from v0.5.0.
Requires Windows 10 (20H1+) or Windows 11, x64. Portable ZIP — no installer needed.
Command-line recording control
With FastCast running, scripts can now start and stop recording:
fastcastc --start-record # start recording
fastcastc --start-record --monitor 2 # record display 2
fastcastc --stop-record # stop the recording- The commands trigger the same guarded action as the Start/Stop button and the
Ctrl+Alt+F9hotkey, so a recording can never be double-started or stopped when idle. --monitor Nrecords display N (the "Display N" entries of the app's Screen list). The choice sticks like a manual selection; an unknown display number is rejected.- Exit codes are script-friendly:
0for success and for harmless no-ops (already recording / nothing to stop), nonzero for failures (FastCast not running, start failed, unknown display). Output is plain text with no log noise. - The ZIP now includes
fastcastc.exenext tofastcast.exe— usefastcastcfrom scripts and shells: it waits for the command and exits with its exit code. - FastCast is never launched automatically, and nothing runs in the background — if it isn't running, the command says so and exits nonzero.
Run fastcastc --help for the full CLI reference. The QUICKSTART.txt in the ZIP has a new COMMAND LINE section.
Upgrading from v0.5.0
Unzip v0.5.1 anywhere and run fastcast.exe — your settings are stored separately (under %APPDATA%\FastCast) and carry over automatically. You can delete the old folder.
Download & verify
FastCast-0.5.1-win-x64.zip— portable build. Extract and runfastcast.exe.FastCast-0.5.1-win-x64.zip.sha256— checksum for verifying the download.
Expected SHA-256 for FastCast-0.5.1-win-x64.zip:
1c890d9de1f8da1ddfc70a654e8d9b08e7fd62b8fc11e8e38d82cb334f2f2c88
Verify in PowerShell:
Get-FileHash .\FastCast-0.5.1-win-x64.zip -Algorithm SHA256This open-beta build is unsigned; Windows SmartScreen may show "Unknown publisher". Click More info → Run anyway only if you trust the download source.
FastCast remains privacy-conscious: no telemetry, no accounts, no crash upload, no background polling, no auto-update. Updates are manual via Check for Updates in the app.