[FFmpeg-devel] sdp.c and CONFIG_RTP_MUXER

[Matthias Schneider]

Hi Diego,
here the exact configure line:
./configure --disable-muxers --enable-muxer=h264 --enable-muxer=mpeg4 --disable-ffserver
--enable-shared

(some muxer thus refers to all muxers disabled except h264 and mpeg4)

A "make" leads to the following error:

...

ln -sf libavformat.so.51 libavformat.so
make[1]: Leaving directory `/usr/src/ffmpeg/libavformat'
touch .libs
gcc -L"/usr/src/ffmpeg"/libavformat -L"/usr/src/ffmpeg"/libavcodec -L"/usr/src/ffmpeg"/libavutil
-rdynamic -export-dynamic -Wl,--warn-common -Wl,--as-needed
-Wl,-rpath-link,"/usr/src/ffmpeg"/libavcodec -Wl,-rpath-link,"/usr/src/ffmpeg"/libavformat
-Wl,-rpath-link,"/usr/src/ffmpeg"/libavutil -g -o ffmpeg_g ffmpeg.o cmdutils.o -lavformat
-lavcodec -lavutil -lm -lz -ldl
gcc -L"/usr/src/ffmpeg"/libavformat -L"/usr/src/ffmpeg"/libavcodec -L"/usr/src/ffmpeg"/libavutil
-rdynamic -export-dynamic -Wl,--warn-common -Wl,--as-needed
-Wl,-rpath-link,"/usr/src/ffmpeg"/libavcodec -Wl,-rpath-link,"/usr/src/ffmpeg"/libavformat
-Wl,-rpath-link,"/usr/src/ffmpeg"/libavutil -g -o ffplay_g ffplay.o cmdutils.o -lavformat
-lavcodec -lavutil -lm -lz -ldl   -L/usr/lib -lSDL
/usr/src/ffmpeg/libavformat/libavformat.so: undefined reference to `rtp_get_payload_type'
collect2: ld returned 1 exit status
make: *** [ffmpeg_g] Error 1
make: *** Waiting for unfinished jobs....
/usr/src/ffmpeg/libavformat/libavformat.so: undefined reference to `rtp_get_payload_type'
collect2: ld returned 1 exit status
make: *** [ffplay_g] Error 1

The problem is that in rtp.c some parts are conditionally compiled if CONFIG_RTP_MUXER is defined.
In sdp.c however the function rtp_get_payload_type is referenced regardless of that define...

Matthias

--- Diego Biurrun <diego at biurrun.de> schrieb:

> On Sat, Jul 28, 2007 at 02:34:45PM +0200, Matthias Schneider wrote:
> > compiling ffmpeg and having some muxers disabled lead to a problem
> > with the newly introduced sdp.c (rtp_get_payload_type wasn't found
> > when linking since CONFIG_RTP_MUXER was set to 0). The enclosed patch
> > should fix that issue.
> 
> Unreproducible.
> 
> Provide exact instructions to reproduce the compilation failure.  "some
> muxers" is useless information, we need details here, not guesswork.
> 
> Diego
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> 



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