OpenH264思科的 H.264 編碼器
OpenH264 是思科公司發(fā)布的一個(gè)開(kāi)源的 H.264 編碼和解碼器。
編碼器特性
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
解碼器特性
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
支持的操作系統(tǒng)
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)
支持的處理器
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