﻿视频转换工具
ffmpeg -y -i test.mpeg -bitexact -vcodec h263 -b 128 -r 15 -s 176x144 -acodec aac -ac 2 -ar 22500 -ab 24 -f 3gp test.3gp 

高品质：ffmpeg -i "E:\123\clock.avi" -ab 128 -acodec libmp3lame -ac 1 -ar 22050 -r 29.97 -qscale 6 -y "E:\123\clock123.flv"
低品质：ffmpeg -i infile -ab 128 -acodec libmp3lame -ac 1 -ar 22050 -r 29.97 -b 512 -y outfile

ffmpeg -y -i "E:\123\clock.avi" -bitexact -vcodec h263 -b 128 -r 15 -s 176x144 -acodec aac -ac 2 -ar 22500 -ab 24 -f flv "E:\123\clock123.flv"

ffmpeg -y -i "E:\123\clock.avi" -ac 1 -acodec amr_nb -ar 8000 -s 176x144 -b 128 -r 15 "E:\123\clock123.flv"
ffmpeg -y -i  "E:\123\clock.avi" -ab 56 -ar 22050 -b 500 -r 15 -s "E:\123\clock22.flv"

 -i "E:\123\test2.rmvb" -ab 56 -ar 22050 -b 500 -r 15 -s 320x240 "E:\123\test2.rmvb.flv" 
  -i "E:\123\test2.rmvb" -b 360 -r 25 -s 320x240 -hq -deinterlace -ab 56 -ar 22050 -ac 1 "E:\123\test2.rmvb.flv"
  ffmpeg -i "E:\123\clock.avi" -ab 56 -ar 22050 -qmin 2 -qmax 16 -b 320k -r 15 -s 320x240 "E:\123\clock22.flv"



截图成功：  ffmpeg -i "E:\123\clock.avi" -y -f image2 -ss 8 -t 0.001 -s 350x240 "E:\123\clock.avi.jpg"
  成功： ffmpeg -i "E:\123\clock.avi" -y -f image2 -ss 2 -vframes 1 -s 350x240 "E:\123\clock.avi.jpg"
最新版ffmpeg转码成功： ffmpeg.exe -i "E:\123\test2.rmvb" -y -ab 56 -ar 22050 -b 500 -r 15 -s 320*240 "E:\123\test2.rmvb.flv"
