[Ffmpeg-devel] Differences between H.263 and H.263i and H.263p in FFMPEG

Tobias Marx superoverdrive
Mon Oct 16 14:45:51 CEST 2006

I have checked out ffmpeg and compiled it.

I tried to run the watermark module and I got the following error:

undefined symbol: sws_getCachedContext

The whole output was:

p15201909:/home/ffmpeg/ffmpeg # ffmpeg -i sample.mpg -vhook '/usr/local/lib/vhook/watermark.so -f logo.gif' -an out.mov
FFmpeg version SVN-r6708, Copyright (c) 2000-2006 Fabrice Bellard, et al.
  libavutil version: 49.0.1
  libavcodec version: 51.20.0
  libavformat version: 50.6.0
  built on Oct 16 2006 14:44:13, gcc: 3.3.5 20050117 (prerelease) (SUSE Linux)
Input #0, mpeg, from 'sample.mpg':
  Duration: 00:00:00.0, start: 0.500000, bitrate: 49971 kb/s
  Stream #0.0[0x1e0]: Video: mpeg1video, yuv420p, 320x240, 104857 kb/s, 25.00 fps(r)
/usr/local/lib/vhook/watermark.so: undefined symbol: sws_getCachedContext
Failed to add video hook function: /usr/local/lib/vhook/watermark.so -f logo.gif

Have you got any idea whats going wrong?



-------- Original-Nachricht --------
Datum: Mon, 16 Oct 2006 11:13:29 +0200
Von: Michael Niedermayer <michaelni at gmx.at>
An: FFmpeg development discussions and patches <ffmpeg-devel at mplayerhq.hu>
Betreff: Re: [Ffmpeg-devel] Differences between H.263 and H.263i and H.263p in	FFMPEG

> Hi
> dont missuse the reply function of your MUA when you intend to start
> a new thread, it will mess up the threaded view for other people
> (messages will be displayed as replies to random other messages)
> On Mon, Oct 16, 2006 at 02:08:12AM -0700, yj wrote:
> > Hi,
> > Can anyone give me a clue about the differences
> > between H.263 and H.263i and H.263p in ffmpeg?
> > and also the differences between these codecs and the
> > standard h.263 codec.
> > Appreciate for your help.
> read the fine ffmpeg source code
> [...]
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> In the past you could go to a library and read, borrow or copy any book
> Today you'd get arrested for mere telling someone where the library is
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> ffmpeg-devel at mplayerhq.hu
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