[MEncoder-users] -oac copy and -of lavf shows audio data info wrong for flv videos.

[Bill Crockett]

I have found now that it is not only the stream copying command, but 
encoding an mp4 with AVC and AAC to a Flash Video flv with AVC and AAC 
resulted in extremely low audio bit rate.  For example, a bit rate of 
128 kbps wanted, resulted in only 3 kbps.

Is there anything wrong with this command line please?

mencoder inputfile.mp4 -o outputfile.flv -vf harddup -oac faac -faacopts 
mpeg=4:object=2:raw:br=128 -of lavf -lavfopts format=flv -ovc x264 
-x264encopts 
level_idc=30:bframes=0:bitrate=768:global_header:subq=5:frameref=6:part 
itions=all:trellis=1:chroma_me:me=umh

This command line below also resulted in 3 kbps for the audio, even 
though the original video has 128 kbps for the audio.

mencoder -ovc copy -oac copy -of lavf -lavfopts format=flv -fafmttag 
0x706d inputfile.flv -o outputfile.flv

Is this the cause of it all?

==========================================================================
** MUXER_LAVF 
*****************************************************************
REMEMBER: MEncoder's libavformat muxing is presently broken and can generate
INCORRECT files in the presence of B-frames. Moreover, due to bugs MPlayer
will play these INCORRECT files as if nothing were wrong!
*******************************************************************************

The "-x264encopts bframes=0" made no difference.  It only seems to 
affect Flash Videos with AVC & AAC and the flv container.  Is there any 
fix for this please?