[FFmpeg-user] possible to do mp3 @ 48kHz
jshupert at pps-inc.com
Wed May 11 21:22:22 CEST 2011
On 5/11/2011 12:59 PM, James Darnley wrote:
> On 11/05/2011, Jim Shupert<jshupert at pps-inc.com> wrote:
>> I am successful transcoding files with
>> ffmpeg -i D:\path\vid\my.mpg -ab 192000 -ar 44100 -b 8000000 -s 720x480
>> -vcodec libxvid -acodec libmp3lame D:\path\vid\my.avi
>> ffmpeg -i D:\path\vid\my.mpg -ab 192000 -ar 44100 -b 1500000 -r 30 -s
>> 720x480 -f flv D:\path\vid\my.flv
>> but the problem is i would very much enjoy having the audio sampling
>> rate of 48kHz ; -ar 48000
>> and libmp3lame only will do 44100 , 22050 , 11025
>> so if i really wanted to have mp3 48 kHz audio --- is there any solution?
> lame happily supports 48 KHz. FLV does not. Stop using FLV and all
> will be fine.
Yes, thank you -- you are exactly correct.
I am have just made 48kHz mp3 in the avi.. it seems (from what i have
now read) that FLV supports only 4 rates
5.5 kHz, 11 kHz, 22.05 kHz, 44.1 kHz
But I now have a second Q of the same encodes if I look at my result in
mediainfo i see
that the video datarate is not what i used in my command
mediainfo reports the 2 files at 2 diffrent rates
Bit rate : 4557 Kbps
Bit rate : 2983 Kbps
ffmpeg -i D:\path\vid\my.mpg -ab 192000 -ar 48000 -b 8000000 -s 720x480
-vcodec libxvid -acodec libmp3lame D:\path\vid\my.avi
so insted of -b 8000000 [ 8 mbps ] i am getting a vbr ?
is that true and how do i make it cbr @ 8mbps
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