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mencoder <filename.avi> -ovc xvid -oac mp3lame -xvidencopts fixed_quant=4 -o <output.avi>
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Vlatko Kosturjakmencoder and ffmpeg quick reference - mostly xvid and bitrates explanations
mencoder mplayer xvid divx encoding multimedia transcode conversion avi wmv howto linux ffmpeg delicious
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Ramón SuárezThere are many good reasons to convert video files you made yourself - or video files forwarded to you which you plan to distribute.
Good reasons to change a video file can be:
* Playability
* Size
This howto will to introduce to you some of tlinux howto conversion tutorial dvd multimedia flash ffmpeg encoding convert ubuntu digital mplayer bitrate transcode cd mencoder video
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Flash video (flv)
ffmpeg is the best choice for making flash video sites (.flv files). The syntax is simple:
ffmpeg -i inputfile.avi flashfile.flv
A parameter you likely want is -ab, audio bitrate. The default is 64, which may be fine for home videos, but is is too poor if you want to promote your local talented singer in a music video. Example:
ffmpeg -i musicvideo.mpg -ab 256 Som_du_visnar2.flv
Also note that .flv files do not support a samlerate of 48000, but it will convert using the original file's rate anyway and fault on exit. Flash video can have a sample rate of 44100, 22050 and 11025. Set the audio sampling frequency with -ar freq (usually -ar 44100) if the original file has something other than the valid rates.
Options you may want to consider:
-ab (number) # audio bitrate -ar freq # audio sampling frequency -b video bitrate # defaults to 200, which is kind of low
You should also be aware of -sameq. This makes the video the same quality as the original, but tends to make flash video files twice the size as original mpeg's. This is bad when it comes to serving files, but it may be worth it if you really want your flash video to have high quality (and you have the bandwidth..).
(I dont know why? but i experienced FFMPEG doesnot convert all standard vodeos even in MPEG ,AVI format etc into FLV format. Do you know why? please email me at imtahir@gmail.com. Regards )
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