檔案轉換 Convert rmvb to flv

原本以為 ffmpeg 不支援 RMVB / WMV9 格式
所以找了 memcoder (similar to ffmpeg)
 
1.) 首先將 rmvb 檔 轉到去 avi 檔
memcoder command:
mencoder demo.rmvb -oac mp3lame -lameopts preset=64 -ovc xvid -xvidencopts bitrate=600 -of avi -o demo.avi

2.) 之後再由 avi 轉到去 flv
ffmpeg command:
ffmpeg -i demo.avi -ab 56 -ar 22050 -b 500 -r 15 -s 640x480 demo.flv

不過我再試一下用 ffmpeg 直接轉換如下:

ffmpeg -y -i demo.rmvb -ab 32k -ar 22050 -b 300k -bt 100k -r 15 -s 640x480 demo.flv

一樣也可以轉換成功呀 !!!

但就出了一堆 warning message (可以不理會)

[aac @ 0x3eb8a0]SBR not implemented. Update your FFmpeg version to the newest one from SVN. If the problem still occurs, it means that your file has a feature which has not been implemented.



ffmpeg download:
http://www.videohelp.com/tools/ffmpeg

memcoder download: (command  line tool)
http://www.videohelp.com/tools/MPlayer