[FFmpeg-user] FFmpeg Library

Clément Bœsch u at pkh.me
Thu Sep 17 10:56:39 CEST 2015

On Thu, Sep 17, 2015 at 04:47:48PM +0800, Steven Liu wrote:
> You can reference the doc/example file makefile
> -fomit-frame-pointer -pthread   -g -Wdeclaration-after-statement -Wall
> -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings
> -Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast
> -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch
> -Wno-format-zero-length -Wno-pointer-sign -O3 -fno-math-errno
> -fno-signed-zeros -fno-tree-vectorize -Werror=format-security
> -Werror=implicit-function-declaration -Werror=missing-prototypes
> -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto
> -Wno-maybe-uninitialized    -c -o doc/examples/transcoding.o
> doc/examples/transcoding.c
> gcc -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavresample
> -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -Wl,--as-needed
> -Wl,-z,noexecstack -Wl,--warn-common
> -Wl,-rpath-link=libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
>   -o doc/examples/transcoding_g doc/examples/transcoding.o   -lavdevice
> -lavfilter -lavformat -lavcodec -lpostproc -lswresample -lswscale -lavutil
> -lXv -lX11 -lXext -lva -lva-x11 -lva -lxcb -lxcb-shm -lxcb -lxcb-xfixes
> -lxcb-render -lxcb-shape -lxcb -lxcb-shape -lxcb -lX11 -lx264 -lmp3lame
> -lfaac -lm -lz -pthread
> the simple is looks like :
> gcc -g doc/examples/muxing.c -o muxing  -lavcodec -lavdevice -lavfilter
> -lavformat -lavutil -lswscale -lswresample -lpostproc -lx264 -lmp3lame -lz
> -liconv -lbz2

No. You should NEVER explicit the libraries and sub dependency libraries
by yourself (because it's build and installation dependent). See how it's
done in the Makefile.


Clément B.
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