decode 3gp, possible?

[dragonBoy]

hi all

i have been using ffmpeg to convert videos for my work
and we have members that take videos from their phone, and we want to also display these on the web for web users
we want to convert these to wmv (although we have experienced these issues with all formats we've tried)
mp4 videos taken from phones, we can convert with no problem

but the video always seems to have frames missing, while the audio plays through completely
is this a known issue?

i have also tried commercial software, imtoo converter, but this had the same issue when converting to an avi file, or could this be a computer issue
i'm not sure about that, because the computer i tried ffmpeg with is a dedicated server (web server albeit, but with very light traffic) and has heaps of memory + cpu power

command line
ffmpeg -i videos-processing/input.3gp -b 128 -ar 8000 -ab 16 -acodec mp3 -vcodec wmv1 videos-converted/output.wmv

BUILD INFO
ffmpeg version 0.4.9-pre1, build 4730, Copyright (c) 2000-2004 Fabrice Bellard
configuration: --host=i686-redhat-linux-gnu --build=i686-redhat-linux-gnu --t
arget=i386-redhat-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr -
-bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --in
cludedir=/usr/include --libdir=/usr/lib --libexecdir=/usr/libexec --localstatedi
r=/var --sharedstatedir=/usr/com --mandir=/usr/share/man --infodir=/usr/share/in
fo --extra-cflags=-O2 -g -pipe -march=i386 -mcpu=i686 --enable-mp3lame --enable-
vorbis --enable-faad --enable-faac --enable-xvid --enable-pp --enable-shared-pp
--enable-shared --enable-gpl --disable-strip --enable-amr_nb
built on Aug 4 2005 17:18:42, gcc: 3.2.3 20030502 (Red Hat Linux 3.2.3-52)

[celtic_druid]

0.4.9-pre1, build 4730, that would be quite old wouldn't it? Build I did back in june is build 4755.

Try a fresh checkout and see if it helps.

[dragonBoy]

hi thanks for your reply
i assume you are building from src
are you able to convert from 3gp smoothly?

the reason i am using the old build is because i need to have ffmpeg installed as an rpm, and that is the most recent rpm that i can find for our server rhel3
and even then i had to recompile from the src rpm to get the amr_nb option enabled

we don't currently have a computer that we can test using the src compile unfortunately
and in the end we do need to use rpm's because it is much easier for us maintaining the server

and i'm no linux pro, so i can't build the rpm myself

dave

[celtic_druid]

Never tried to convert any 3gp files.