FFMPEG Help

IceXaos · 06-12-2012, 01:20 PM

I can't quite figure out what all flags I need for this. If someone could help me with the command, it'd be greatly appreciated.

Starting with video of any aspect ratio or format.
Convert to flash FLV file.
Set average bitrate to 500 kb/s.
Set audio Hz to 22050.
Set audio bitrate to 96 kb/s.
Set video width to 512 while keeping aspect ratio.

Thanks much for any help.

teckk · 06-12-2012, 08:49 PM

http://linux.die.net/man/1/ffmpeg

Code:

-ar freq
    Set the audio sampling frequency (default = 44100 Hz). 
-ab bitrate
    Set the audio bitrate in bit/s (default = 64k). 
-ac channels
    Set the number of audio channels (default = 1)
-acodec codec
    Force audio codec to codec. Use the "copy" special value to specify that the raw codec data must be copied as is.

Code:

-b bitrate
    Set the video bitrate in bit/s (default = 200 kb/s). 
-s size
    Set frame size. The format is wxh (ffserver default = 160x128, ffmpeg default = same as source). The following abbreviations are recognized: 
-r fps
    Set frame rate (Hz value, fraction or abbreviation), (default = 25). 
-aspect aspect
    Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777). 
-vcodec codec
    Force video codec to codec. Use the "copy" special value to tell that the raw codec data must be copied as is.

Something like

Code:

ffmpeg -i video.avi -acodec libmp3lame -ar 22050 -ab 96k -b 500k -s 512x240 -f flv output.flv

Use your own parameters, codecs you want to use, size etc.

Running just ffmpeg will show you what it was compiled with.

http://linuxers.org/tutorial/ffmpeg-tutorial-beginners
http://www.linuxstall.com/ffmpeg-tutorial/
http://ffmpeg.org/ffmpeg.html