ZeroVideo: Enterprise Pure C# Video Streaming, Transport & Multimedia Engine

ZeroVideo is a sovereign, high-performance, pure C# video streaming, camera network transport, and multimedia playback engine for .NET. Completely free from heavyweight native C++ bindings (no FFmpeg or VLC unmanaged binaries required), it provides low-latency RTSP/RTP/H.264 stream ingestion, industrial Motion JPEG (MJPEG) streaming, lossless bitmap snapshot generation, strided multi-format video frame buffers, fast BT.601 color conversions, and clock-synchronized video playback.

Operating as a core member of Tier 3 (Perception & Intelligence) within the ZeroPlatform ecosystem.

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🏛️ Ecosystem Architectural Alignment

• Architectural Tier: Tier 3 (Perception & Intelligence)
• Permitted Upstream Dependencies: Tier 0 (ZeroPrimitives, ZeroConcurrency, ZeroSecurity), Tier 1 (ZeroCompute, ZeroTensor), Tier 2 (ZeroNetwork)
• Downstream Consumers: Tier 4 (ZeroGraphics), Tier 5 (ZeroPipeline, ZeroUI)
• Core Guarantees: Pure C# execution, Zero Large Object Heap (LOH) GC allocations on hot streaming loops, zero unmanaged runtime binary dependencies.

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Key Features

• Zero-LOH Frame Memory Pool (VideoFramePool, PooledVideoFrameBuffer):
  • High-throughput buffer pooling using ArrayPool<byte>.Shared to eliminate Large Object Heap (LOH) GC pauses during continuous high-FPS streaming.
  • Implements IDisposable with zero-allocation span accessors (AsSpan, AsReadOnlySpan, GetRowSpan).
• Industrial Motion JPEG Multipart Client (MjpegClient):
  • Ingests standard multipart/x-mixed-replace HTTP video streams from industrial IP cameras (Basler, FLIR, Axis, Hikvision, ESP32-CAM, OctoPrint) with zero external libraries.
  • Non-blocking asynchronous reading loop (ReadAsync) with fault-tolerant JPEG SOI (0xFF, 0xD8) and EOI (0xFF, 0xD9) marker search.
  • Event-driven frame dispatching (FrameReceived).
• Lossless Snapshot BMP Exporter (SnapshotExporter):
  • Pure C# Windows Bitmap (.bmp) generator without GDI+ or System.Drawing dependencies.
  • Full support for 8-bit Gray8 (with 256-color grayscale palette), 24-bit BGR/RGB, 32-bit BGRA/RGBA, and planar YUV420P/NV12.
• Strided Video Frame Buffer (VideoFrameBuffer):
  • Low-latency pixel memory wrapping supporting Gray8, RGB24, BGR24, RGBA32, BGRA32, NV12, and YUV420P with nanosecond presentation timestamps (PTS).
• RTSP 1.0 Client Transport (RtspClient):
  • Pure C# session negotiation (OPTIONS, DESCRIBE, SETUP, PLAY, PAUSE, TEARDOWN) with SDP video track parsing for IP security and industrial cameras.
• RFC 3550 RTP Stream Demuxing (RtpPacket):
  • Fast binary packet header parsing and serialization with SSRC and sequence number tracking.
• H.264 AVC NAL Unit Scanner (H264NaluParser):
  • Annex B start code detection (0x000001 / 0x00000001) and parameter set (SPS/PPS) extraction.
• RFC 6184 FU-A Reassembly with Packet Loss Guard (H264FuAReassembler):
  • Seamless reassembly of fragmented NAL units across RTP packet boundaries using reusable assembly memory and sequence number continuity validation to discard corrupted frames.
• H.264 SPS Bitstream Metadata Parser (H264SpsParser):
  • Pure C# Exp-Golomb bitstream decoder extracting video dimensions (width, height), profile, and level from raw Sequence Parameter Sets without external decoders.
• Fixed-Point BT.601 Color Conversion (ColorConverter):
  • Integer-scaled conversion from YUV420P and NV12 to packed RGB24 and BGR24 with 2x horizontal chrominance calculation reuse and aggressive inlining.
• Master Playback Clock & Backpressured Player (VideoClock, VideoPlayer):
  • Drift-free PTS synchronization, bounded queue backpressure control (MaxQueueCapacity, FrameDropStrategy.DropOldest), variable playback rate, seeking, and forensic frame stepping.

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Multi-Targeting

• .NET 8.0+
• .NET Framework 4.6.2+
• .NET Standard 2.0

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License

MIT License. Copyright © 2026 Phong Võ (kzxl).