MP4 to PRC Converter

Extract Psion Record audio from MP4 video online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Psion Record Format

PRC is the native voice recording format for Psion PDAs. Converting from MP4 creates files that load on these vintage handhelds.

Compact Voice Files

PRC produces small voice recordings from your MP4 audio — matching the storage constraints of Psion devices.

Cloud Conversion

No Psion tools required. Our servers handle the MP4 to PRC extraction and encoding entirely online.

How to convert MP4 to PRC

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose prc or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your prc file right afterwards

About formats

MP4 (MPEG-4 Part 14) is the most widely used multimedia container format in the world, standardized by the Moving Picture Experts Group as part of the MPEG-4 specification in 2003. Built on the ISO base media file format (MPEG-4 Part 12), which itself drew from the Apple QuickTime container, MP4 uses a hierarchical atom/box structure that can encapsulate virtually any type of media data. The container most commonly packages H.264 or H.265 video with AAC audio, though it also supports a wide range of alternative codecs including AV1, VP9, MPEG-4 Visual, AC-3, and ALAC. The design supports advanced features such as streaming hints for progressive download and adaptive streaming, chapter markers, multiple audio and subtitle tracks, metadata tags, and embedded thumbnail images. A standardized structure and broad codec support have made MP4 the default choice for online video platforms, mobile devices, digital cameras, and operating system media libraries. HTML5 video with H.264 in MP4 is supported by every major web browser, establishing the combination as the universal baseline for web video delivery. Efficient packaging overhead, combined with the compression capabilities of modern codecs it carries, enables high-quality video distribution at practical file sizes across bandwidth-constrained networks and storage-limited devices.
Initial release: 2003
PRC is an audio file format associated with Psion handheld organizers, particularly the Series 3 and Series 5 lines from the 1990s. These pocket computers included built-in microphones and basic voice recording capabilities, storing captured audio in the PRC container. The encoding is typically ADPCM-based (Adaptive Differential Pulse-Code Modulation), balancing file size against audio intelligibility given the severe storage constraints of early PDAs — the original Psion Series 3 had just 256 KB of RAM doubling as storage. PRC audio is generally mono at low sample rates (often 8 kHz), optimized for speech rather than music. One advantage was tight integration with the EPOC operating system (later evolving into Symbian), letting users embed voice notes directly in agenda entries and database records. The compact file sizes — a minute of speech consumed only a few kilobytes — made it feasible to store dozens of memos on devices with minimal memory. While PRC audio is a legacy format today, conversion tools exist for extracting recordings from archived Psion devices, which remain collectible among retro computing enthusiasts.
Developer: Psion PLC
Initial release: 1993

Frequently Asked Questions

Why convert MP4 to PRC?

PRC is the Psion Record audio format used by Psion organizer devices. Converting creates recordings compatible with this vintage PDA platform.

What opens PRC files?

Psion handheld devices and Psion emulators load PRC voice recordings natively. SoX can also process the audio data.

Is PRC a modern format?

PRC is a legacy format specific to Psion PDAs. It is used today by retro computing enthusiasts and for Psion data preservation.

Can I batch convert?

Upload multiple MP4 files at once. Each audio track is extracted and formatted as a separate PRC file.

What quality does PRC offer?

PRC is designed for voice-quality recordings on Psion hardware — compact files with speech-grade audio fidelity.

Does it remove the video?

Yes — only the audio from your MP4 is kept. The result is a Psion Record audio file with no video content.

MP4 to PRC Quality Rating

4.6 (16 votes)
You need to convert and download at least 1 file to provide feedback!