来源:http://stackoverflow.com/questions/25197169/how-to-decode-a-h-264-frame-on-ios-by-hardware-decoding How to decode a H.264 frame on iOS by hardware decoding? up vote 8 down vote favorite 4 I have been used ffmpeg to decode every single frame that I…

H.264格式,iOS硬编解码 以及 iOS 11对HEVC硬编解码的支持 1,H.264格式 网络表示层NAL,如图H.264流由一帧一帧的NALU组成: SPS:序列参数集,作用于一系列连续的编码图像: PPS:图像参数集,作用于编码视频序列中一个或多个独立的图像: 这两个帧也是独立的NALU. I-Frame:关键帧,帧内编码后的帧,显示比较完全的一帧: P-Frame:参考前一帧,可能只是对比前一帧的运动估计的变化部分: B-Frame:会参照前后的帧,其他类似P-Frame.B和P F…

转自:http://www.5i01.cn/topicdetail.php?f=510&t=3735840&r=18&last=48592660 H.264 / MPEG-4 AVC 是优秀的视讯编码格式就目前已成熟的视讯编码格式而言,H.264的压缩率是最佳的.压缩率极高,可以只用很低 bitrate 提供堪用画质. 而 x264 为免费开放原始码的 H.264 / MPEG-4 AVC 编码器,是目前编码效率最高的开放原始码 H.264 编码器. 此文只是基础知识,说明只是大略…

H.264中NAL.Slice与frame意思及相互关系 NAL nal_unit_type中的1(非IDR图像的编码条带).2(编码条带数据分割块A).3(编码条带数据分割块B).4(编码条带数据分割块C).5(IDR图像的编码条带)种类型 与 Slice种的三种编码模式:I_slice.P_slice.B_slice 还有frame的3种类型:I frame.P frame. B frame之间有什么映射关系么? 最后,NAL nal_unit_type中的6(SEI).7(SPS).8(P…

===================================================== H.264源代码分析文章列表: [编码 - x264] x264源代码简单分析:概述 x264源代码简单分析:x264命令行工具(x264.exe) x264源代码简单分析:编码器主干部分-1 x264源代码简单分析:编码器主干部分-2 x264源代码简单分析:x264_slice_write() x264源代码简单分析:滤波(Filter)部分 x264源代码简单分析:宏块分析(Anal…

1. Introduction Broadcast(广播) television and home entertainment(娱乐) have been revolutionised(彻底改变) by the advent(出现) of digital TV andDVD-video.(--广播电视和家庭娱乐方式被彻底改变了在数字电视和DVD-Video出现之后--) These applications and many more were made possible by the stan…

转债:  http://www.cardinalpeak.com/blog/the-h-264-sequence-parameter-set/ View from the Peak The h.264 Sequence Parameter Set April 20th, 2011 by Ben Mesander This is a follow-up to my World’s Smallest h.264 Encoder post. I’ve received several emails a…

转载 http://www.cardinalpeak.com/blog/worlds-smallest-h-264-encoder/ View from the Peak World’s Smallest h.264 Encoder March 19th, 2010 by Ben Mesander Recently I have been studying the h.264 video codec and reading the ISO spec. h.264 a much more soph…

H.264 Profiles Profiles are sets of capabilities. If your black box only supports the Baseline profile it'll not be able to decode a stream using High capabilities. In VLC you can set the H.264 profile to be used by the x264 encoder like this: --sout…

Status of This Memo This document specifies an Internet standards track protocol for the   Internet community, and requests discussion and suggestions for   improvements.  Please refer to the current edition of the "Internet   Official Protocol Stand…