[MEncoder-users] Couple Issues

[Brendan Schwartz]

On 8/10/07, snap at snapdrive.net <snap at snapdrive.net> wrote:
>
> Hello,
>
> I have a couple problems with mencoder that I was hoping someone could
> give me a little assistance with. I've installed everything (mplayer
> from SVN), and for the most part it works. I can successfully convert
> avi files without any problems at all. The two issues I have are:
>
> When running:
>
> mencoder 100_1926.MOV -ofps 24 -o test.flv -of lavf -oac mp3lame
> -lameopts abr:br=64 -ovc lavc -lavcopts
> vcodec=flv:keyint=12:vbitrate=800:mbd=2:mv0:trell:v4mv:cbp:last_pred=3
> -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -srate
> 22050 -vf scale -zoom -xy 320
>
>
> 1) Option lavfopts: Unknown suboption
> i_certify_that_my_video_stream_does_not_use_b_frames
> Error parsing option on the command line: -lavfopts
>
> The only information I could find on this error suggested that using the
> latest SVN would fix it, which I've already installed.
>
> 2) The next problem comes if I remove the "-lavfopts
> i_certify_that_my_video_stream_does_not_use_b_frames " portion of the
> command. In this case, mencoder succesfully converts the file. When
> playing the newly created flv, the video runs at double speed while the
> audio runs at normal speed.
>
> Can anyone offer any suggestions on how I can get these two errors
> corrected?
>
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>

Diego recently committed some changes removing
i_certify_that_my_video_stream_does_not_use_b_frames (
http://cia.vc/stats/author/diego/.message/248bd). My understanding is that
bframes are now supported when using lavf.
Not sure about number 2, but have you tried removing/changing some of the
command line options and seeing if you can narrow down the problem. I would
take a look at -ofps and -srate to start, but I'm no expert.

Good luck,
Brendan