8 月 2014 - 贝壳博客

最近在做全志A20的Android系统开发，经常需要调试script.fex文件中的参数。
会经常用到sunxi-tools中的几个工具

fexc:
	`.fex` file (de)compiler

	Usage: ./fexc [-vq] [-I <infmt>] [-O <outfmt>] [<input> [<output>]]

	infmt:  fex, bin  (default:fex)
	outfmt: fex, bin  (default:bin)

bin2fex:
	compatibility shortcut to call `fexc` to decompile an script.bin
	blob back into `.fex` format used by allwinner's SDK to configure
	the boards.

fex2bin:
	compatiblity shortcut to call `fexc` to compile a `.fex` file into
	the binary form used by the sun4i kernel.

fexc:

`.fex` file (de)compiler

Usage: ./fexc [-vq] [-I <infmt>] [-O <outfmt>] [<input> [<output>]]

infmt: fex, bin (default:fex)

outfmt: fex, bin (default:bin)

bin2fex:

compatibility shortcut to call `fexc` to decompile an script.bin

blob back into `.fex` format used by allwinner's SDK to configure

the boards.

fex2bin:

compatiblity shortcut to call `fexc` to compile a `.fex` file into

the binary form used by the sun4i kernel.

后来需要在windows下工作切换环境很麻烦所以用cygwin编译了sunxi-tools 并写了几个脚本文件，方便多了

步骤：继续阅读“windows下全志 A20 Android script.fex 调试工具”

原创文章，转载请注明： 转载自贝壳博客

本文链接地址: windows下全志 A20 Android script.fex 调试工具

阅读ffmpeg串流的手册FFmpeg Streaming Guide
当进行点对点串流时
如果视频编码为H.264时，payload type 为 96

$ ffmpeg -re -i sample1.mp4 -an -c copy -f rtp rtp://127.0.0.1:12345

Output #0, rtp, to 'rtp://127.0.0.1:12345':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf55.48.100
    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 424x240, q=2-31, 420 kb/s, 24 fps, 90k tbn, 24 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 127.0.0.1
t=0 0
a=tool:libavformat 55.48.100
m=video 12345 RTP/AVP 96
b=AS:420
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0LAHpZiA2P8vCAAAAMAIAAABgHixck=,aMuMsg==; profile-level-id=42C01E

$ ffmpeg -re -i sample1.mp4 -an -c copy -f rtp rtp://127.0.0.1:12345

Output #0, rtp, to 'rtp://127.0.0.1:12345':

Metadata:

major_brand : isom

minor_version : 512

compatible_brands: isomiso2avc1mp41

encoder : Lavf55.48.100

Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 424x240, q=2-31, 420 kb/s, 24 fps, 90k tbn, 24 tbc (default)

Metadata:

handler_name : VideoHandler

Stream mapping:

Stream #0:0 -> #0:0 (copy)

SDP:

v=0

o=- 0 0 IN IP4 127.0.0.1

s=No Name

c=IN IP4 127.0.0.1

t=0 0

a=tool:libavformat 55.48.100

m=video 12345 RTP/AVP 96

b=AS:420

a=rtpmap:96 H264/90000

a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0LAHpZiA2P8vCAAAAMAIAAABgHixck=,aMuMsg==; profile-level-id=42C01E

此时会自动输出一段SDP的代码，这时候如果直接播放继续阅读“使用ffmpeg进行rtp串流h.264时关于sdp的一些分析”

原创文章，转载请注明： 转载自贝壳博客

本文链接地址: 使用ffmpeg进行rtp串流h.264时关于sdp的一些分析