Compressed file formats (ranging from 480p up to 1080p Web-DL) built for users with limited or metered internet connections. Traffic Dynamics and Regional Demand
is the first open‑source, royalty‑free JPEG‑XL‑compatible format that delivers 8‑K+ HDR quality at 50 % lower bitrate than legacy JPEG. It ships with a C‑library , Rust bindings , and a WebAssembly (Wasm) codec for browsers. In this post you’ll learn:
// Set encoding parameters hdjan24_enc_params params = .quality = 85, // 0‑100, 85 ≈ 0.9 SSIM .color_space = HDJAN24_CS_RGB, // RGB, not YCbCr .hdr = true, // Enable PQ‑Quant .progressive = true ; hdjan24
int main(void) // Load raw RGBA data (e.g., via stb_image) int w, h, channels; unsigned char *raw = stbi_load("sample.png", &w, &h, &channels, 4); if (!raw) perror("stbi_load"); return 1;
All tests run on an AMD Ryzen 7950X (16 cores) with SIMD optimizations enabled. Compressed file formats (ranging from 480p up to
| Language | Binding | Status | |----------|----------|--------| | C/C++ | libhdjan24 | ✅ stable (v1.2) | | Rust | hdjan24_rs | ✅ stable (v0.9) | | Python | hdjan24-py | ✅ stable (v0.3) | | JavaScript (Wasm) | hdjan24-wasm | ✅ stable (v0.2) | | Go | hdjan24-go | ✅ beta (v0.1) |
vcpkg install hdjan24
[dependencies] hdjan24_rs = "0.9"
Daily soap operas and television dramas from prominent Indian and Bangladeshi networks. In this post you’ll learn: // Set encoding
| Test | Resolution | Bitrate (MB) | PSNR (dB) | SSIM | Encode Time (s) | Decode Time (ms) | |------|------------|--------------|-----------|------|-----------------|------------------| | – 8K HDR (3840 × 2160) | 8 K HDR | 7.8 | 49.2 | 0.992 | 1.6 (4‑core) | 12 | | Benchmark B – 4K SDR (3840 × 2160) | 4 K SDR | 2.1 | 46.8 | 0.987 | 0.9 | 8 | | Benchmark C – 1080p (1920 × 1080) | 1080p | 0.42 | 44.5 | 0.981 | 0.3 | 4 | | Legacy JPEG – Same images | – | 14.6 (8 K) | 45.3 | 0.945 | 0.4 | 5 | | AVIF (AV1‑based) | – | 8.2 (8 K) | 48.1 | 0.989 | 2.3 | 15 |
// Encode let mut encoder = Encoder::new(¶ms); let encoded = encoder.encode(&img, w, h)?;