[MPlayer-users] Cannot set bitrate using faac codec

Nico Sabbi nsabbi at email.it
Thu Mar 9 13:34:18 CET 2006


?? wrote:
> On Thursday 09 March 2006 20:16, Nico Sabbi wrote:
>   
>> ?? wrote:
>>     
>>> Hi,
>>>
>>> I've encounted this strange problem, that I cannot set the bitrate with
>>> -faacopts br=xxx when encoding using faac, I'm trying to encoding a video
>>> with a
>>>
>>> AUDIO: 48000 Hz, 2 ch, s16le, 1536.0 kbit/100.00% (ratio: 192000->192000)
>>>
>>> even if I set br=1, the audio was encoded with a 160 kbps/s. But if I
>>> extract the audio and encode it using faac -b xxx, it works ok.
>>>       
>> br=1 doesn't make sense. What other bitrates did you use?
>> Also, post the full log, please
>>     
>
> I did the encoding with the following command line:
>
> /usr/local/mplayer/bin/mencoder -v 01-03.avi -ovc copy -oac faac -faacopts 
> br=64 -o test.avi > debug.log
>
> You can see from the attachment the audio is actually encoded to 155 kbps/s
>
>   
> ------------------------------------------------------------------------
>
>   
[snip]
> Pos:   1.2s     30f ( 0%)   0fps Trem:   6min 1576mb  A-V:0.074 [28801:155] A/Vms 12/1 D/B/S 0/0/1 
> Pos:   1.2s     31f ( 0%)  27fps Trem:   6min 1381mb  A-V:0.078 [28801:155] A/Vms 13/1 D/B/S 0/0/1 
> Writing index...
> Writing header...
> ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
>
> Video stream: 28801.224 kbit/s  (3600153 B/s)  size: 4320000 bytes  1.200 secs  31 frames
>
> Audio stream:  155.995 kbit/s  (19499 B/s)  size: 32447 bytes  1.664 secs
> Uninit audio filters...
> [libaf] Removing filter dummy 
> uninit audio: pcm
>   

after 1.2 seconds the rate isn't reliable. Wait longer.
BTW, does faac (the executable) respect the specified bitrate?

 
 
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