软件简介

OpenH264 是思科公司发布的一个开源的 H.264 编码和解码器。

编码器特性

• Constrained Baseline Profile up to Level 5.2 (4096x2304)

• Arbitrary resolution, not constrained to multiples of 16x16

• Rate control with adaptive quantization, or constant quantization

• Slice options: 1 slice per frame, N slices per frame, N macroblocks per slice, or N bytes per slice

• Multiple threads automatically used for multiple slices

• Temporal scalability up to 4 layers in a dyadic hierarchy

• Spatial simulcast up to 4 resolutions from a single input

• Long Term Reference (LTR) frames

• Memory Management Control Operation (MMCO)

• Reference picture list modification

• Single reference frame for inter prediction

• Multiple reference frames when using LTR and/or 3-4 temporal layers

• Periodic and on-demand Instantaneous Decoder Refresh (IDR) frame insertion

• Dynamic changes to bit rate, frame rate, and resolution

• Annex B byte stream output

• YUV 4:2:0 planar input

解码器特性

• Constrained Baseline Profile up to Level 5.2 (4096x2304)

• Arbitrary resolution, not constrained to multiples of 16x16

• Single thread for all slices

• Long Term Reference (LTR) frames

• Memory Management Control Operation (MMCO)

• Reference picture list modification

• Multiple reference frames when specified in Sequence Parameter Set (SPS)

• Annex B byte stream input

• YUV 4:2:0 planar output

支持的操作系统

• Windows 64-bit and 32-bit (initial release is only 32-bit, 64-bit will follow soon)

• Mac OS X 64-bit (initial release does not include this target, will follow soon)

• Linux 64-bit and 32-bit (initial release is only 32-bit, 64-bit will follow soon)

• Android 32-bit (initial release does not include this target, will follow soon)

• iOS 64-bit and 32-bit (not supported yet, may be added in the future)

支持的处理器

• Intel x86 optionally with MMX/SSE (no AVX yet, help is welcome)

• ARMv7 optionally with NEON (initial release does not include this target, will follow later)

• Any architecture using C/C++ fallback functions