bitstream_based_models

ITU-T P.1203/P.1204 bitstream parser for H.264/H.265/VP9 extracting QP, motion vectors, and transform coefficient stats for quality modeling.

Link

Comparing H.265/HEVC and VP9: Impact of High Frame Rates on Perceptual QualityAcademic comparison of HEVC and VP9 codecs under high frame-rate conditions, including ffmpeg/libvpx tuning parameters used.
Performance Comparison of AV1, JEM, VP9, and HEVC EncodersFraunhofer HHI SPIE 2017 paper comparing codec internals, BD-BR, and complexity across AV1, JEM, VP9, and HEVC.
libvpx-rsRust bindings for libvpx supporting VP8/VP9 encode/decode with prebuilt binaries.
libvpx-goAuto-generated Go bindings for libvpx, enabling VP8/VP9 encode/decode from Go.
oxideav-vp9Pure-Rust VP9 decoder implementation including header parsing, bool decoder, and partial intra prediction, under active development.
Differentiable VMAF Re-implementation on PyTorchDifferentiable PyTorch reimplementation of VMAF metric enabling gradient-based codec/RDO optimization, with companion code.
nano-hevcMinimal educational HEVC encoder written in pure Python, readable-over-fast, for teaching codec internals.
Opus (xiph/opus)Reference implementation of the Opus audio codec, recently adding deep-learning-based packet loss concealment.
dav1d.wasmWASM port of the dav1d AV1 decoder, SIMD-optimized with TypeScript interfaces, aimed at production use in browsers.
FOSDEM 2024: VVdeC<>Arm — Optimizing an Open Source VVC Decoder for Arm ArchitecturesFOSDEM Open Media devroom talk detailing Arm-specific performance optimization work on the open-source VVdeC VVC decoder.