MP4 Library

Introduction

MP4 is the universal container for recorded and on-demand video. VASTreaming's MP4 library goes far beyond the platform defaults—giving you full control over reading, writing, and fragmenting MP4 files with features built for production streaming workflows.

Pair the MP4 reader and writer with our streaming clients and servers to use MP4 files as a streaming source or as a recording destination.

Features

Codecs:

• Video: H.265 (HEVC), H.264, MPEG-4
• Audio: AAC, MP3

Format support:

• Self-contained MP4 files and fragmented MP4 (fMP4)
• Metadata reading and writing

Advanced capabilities:

• Progressive download optimization—write files ready for streaming playback
• Crash-resistant writer with file recovery logic
• NTP time synchronization for frame-accurate timestamps
• High-performance reader with efficient caching
• Live file tailing—read from a growing, unfinished file in real time

Platforms

Available for all major platforms:

• C# / .NET: .NET 6/7/8/9/10+ (cross-platform), .NET Framework 4.5+
• Java / C++: Android Studio
• C++: Visual Studio (Windows, Linux)
• C++ / Objective-C / Swift: Xcode (macOS, iOS)

Ready to get started? Explore our demo projects on GitHub with a free 30-day demo license, or contact us for additional information.