[MPlayer-users] Problems coding to 3gp

Sebastián Lacuesta sebastianlacuesta at gmail.com
Tue Mar 9 18:41:49 CET 2010

Well, thanks for the -af channels=1 detail, it "worked" for files with
multiple channels, but sound still is fast. Actually, now I use ffmpeg to
convert to 3gp, but first I need to decode the original file using mencoder
because it seems to support more formats. I have a batch process that
receives a video and then it needs to convert it to 3gp. Now I convert the
original video to flv (I needed the video in that format before too) using
mencoder and then I encode it to 3gp using ffmpeg. I don't know if flv is a
good choice as intermediate format.
If I could use mencoder directly, I guess the process would be faster,
without the need of an intermediate file. I have reported it some time ago:
http://bugzilla.mplayerhq.hu/show_bug.cgi?id=1603 I haven't see any
resolution, it leaves as "NEW".
Is there any better choice than flv as intermediate format/audio codec/video

2010/3/9 Carl Eugen Hoyos <cehoyos at ag.or.at>

> Sebastián Lacuesta <sebastianlacuesta <at> gmail.com> writes:
> > mencoder AnInputFile.ext -o TheOutputFile.3gp -of lavf -oac lavc -ovc
> lavc
> > -srate 8000 -vf scale=176:144 -ofps 12 -channels 1 -lavcopts
> > vcodec=h263:acodec=libopencore_amrnb:abitrate=12200
> Did you try FFmpeg?
> ffmpeg -i AnInputFile.ext -acodec libopencore_amrnb -s 176x144 -ac 1 -ar
> 8000
> -ab 12.2k TheOutputFile.3gp
> To downmix, you need -af channels=1, not -channels 1 (see man mplayer).
> Carl Eugen
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