[MEncoder-users] "requested bitrate is too low." in 2-pass x264 encoding

[Stroller]

On 10 Apr 2010, at 12:30, Grozdan wrote:
>> ...
>> I'm not sure I understand why MP4Box is being promoted for this, ...
>>
>> mencoder -dvd-device /dev/rdisk4 dvd://01 -o outputfile.mp4 -vf
>> scale=720:-10,harddup -ofps 24000/1001 -of lavf -lavfopts  
>> format=ipod -alang
>> en -oac faac -faacopts br=192:mpeg=4:object=2:raw -ovc x264 - 
>> x264encopts
>> bitrate 
>> =1500:nocabac:level_idc=30:bframes=0:global_header:threads=auto:subq=
>> 5 
>> :partitions 
>> =all:trellis=1:chroma_me:me=umh:weightp=0:8x8dct=0:force_cfr
>
> As i said it for the second time (and as RC said it too), if you use
> b-frames (which obviously you don't) it will create a broken mp4.
> Without b-frames it's possible to create a valid mp4 but if you throw
> them in, forget it

AIUI b-frames allow higher quality encoding per file-size. Is this  
correct?

Stroller.