[Ffmpeg-devel] [PATCH] Update docs according to new "ab" parameter unit

Benoit Fouet benoit.fouet
Tue Mar 6 11:15:59 CET 2007


Hi,

M?ns Rullg?rd wrote:
> Benoit Fouet said:
>   
>> Hi,
>>
>> Michel Bardiaux wrote:
>>     
>>> Benoit Fouet wrote:
>>>       
>>>> Hi Takis,
>>>>
>>>>         
>>> [snip]
>>>
>>>       
>>>> well, if you update this, you have also to change "-b" to "-vb"
>>>> in fact, the behaviour now is that one:
>>>> - "ab" option sets audio bitrate
>>>> - "vb" option sets video bitrate
>>>> - "b" option sets both
>>>> so, if we have on the same line a "ab" option followed by a "b"
>>>> option... the latter will overwrite the former...
>>>>
>>>>         
>>> Is this *really* what we want? This new meaning for -b will break
>>> *every* example in the archives, every script using ffmpeg,... in a
>>> not-so-obvious way. It might be better to remove with -b entirely.
>>>       
>> should have been a great idea to have those remarks in the dedicated
>> thread, when i exposed it :)
>> i cannot see an easy way to get rid of "b" option, though...
>> and if you want the same bitrate for audio and video, it is quite useful
>> too to handle "b" option...
>>     
>
> Wanting the same audio and video bitrate seems rather unlikely to me.
> I don't think having a shorthand for such a bizarre coincidence is
> really warranted.
>   
it can happen for low resolution video for instance...
anyway, i can have a look to get rid of -b option, but i'd prefer not
to, are there other opinions on this ?

Ben





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