Convert SCR to MP4

A Windows screensaver is usually an executable, while phones, editors, websites, and televisions expect a standard video file. Record its visible animation as MP4 when you need to share, edit, or archive it; renaming the executable cannot perform this conversion.

What the SCR format is

.scr is primarily the Windows screensaver extension. A screensaver is normally an executable Windows program that runs after the configured idle period and may generate animation interactively. Files can appear in C:\Windows\System32, downloaded screensaver packages, or older desktop-customization software.

The extension is also used by unrelated programs for screen recordings, scripts, and project data, so the extension alone does not identify a media format. Do not open an unknown SCR file merely to test it: a screensaver is executable code and can contain malware. Scan it with security software and use only a trusted source.

What the MP4 format is

MP4 is a multimedia container commonly carrying H.264 or H.265 video and AAC audio. It is supported by web browsers, phones, televisions, video editors, and most media players, and normally produces much smaller files than uncompressed capture.

MP4 stores the rendered screen output, not the original screensaver program, settings, interactivity, or behavior. A recording also cannot preserve detail beyond the display resolution and frame rate used during capture.

How to convert a screensaver with OBS studio

1. Download OBS Studio from obsproject.com and install it. Configure a trusted SCR file and scan it before execution.
2. Create an OBS scene and add Sources → Display Capture. Display capture is generally more reliable than window capture because a screensaver may run full-screen or change its window.
3. Open Windows screen-saver settings through Settings → Personalization → Lock screen → Screen saver. Select the screensaver and use Preview. Start the OBS recording immediately before launching the preview; configure OBS hotkeys if moving the mouse would close the screensaver.
4. Set the capture resolution and frame rate in Settings → Video to match the display when practical. In Settings → Output → Recording, choose an H.264 encoder and AAC audio if the screensaver produces audio.
5. Record the required duration, stop the recording, and open the resulting video in a media player before editing or uploading it.

Record to MKV rather than MP4 when possible. MKV is safer if OBS or Windows crashes because the file is less likely to become unusable. After recording, use File → Remux Recordings in OBS to create MP4; remuxing changes the container without re-encoding the video.

Commercial screen recorders such as Camtasia can perform the same capture and export the result as MP4, but OBS Studio is sufficient for a free desktop workflow. Windows' built-in capture tools may stop or interfere when the screensaver exits on input, so test them before relying on them.

When the SCR file is actually video

Some non-Windows applications use .scr for media or recording files. Inspect a copy with MediaInfo or FFmpeg before converting:

ffprobe input.scr

If FFmpeg reports a video stream, convert it with:

ffmpeg -i input.scr -c:v libx264 -preset medium -crf 20 -c:a aac -b:a 128k output.mp4

If a program rejects the extension even though the file is confirmed to be a supported video, copy it and rename the copy to the format identified by MediaInfo before importing it. Never rename a Windows screensaver executable and expect it to become video.

Quality and compatibility limits

For broad compatibility, use H.264 video, AAC audio, a constant frame rate, and the display's native resolution. In FFmpeg, crf 18 to 23 is a practical H.264 quality range; lower values create larger files with less compression.

Screensavers can respond to mouse movement, keyboard input, idle timers, and multiple monitors. Disable notifications, prevent display sleep, keep the capture display unchanged, and test audio separately. Hardware-accelerated or protected content may appear black in window capture; display capture is the appropriate OBS alternative, although some protected output cannot be recorded.

Online services such as CloudConvert and Convertio can convert a confirmed media file whose content is non-sensitive. They generally cannot process a Windows screensaver executable. Uploading an unknown executable creates avoidable security and privacy risks, so use desktop capture for screensaver programs.