On Fri, Sep 18, 2015 at 8:30 PM, Paul B Mahol <[email protected]> wrote:
> On 9/18/15, gaurav mishra <[email protected]> wrote: > > Hi, > > I have written a app using ffmpeg's library and am able to compile and > run > > it on my mac (slighly older version of ffmpeg installed). But when i am > > trying to build the code on ubuntu machine i am getting some errors > > few of them being > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/rtmpproto.c:1087: > undefined > > reference to `inflate' > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/rtmpproto.c:1105: > undefined > > reference to `inflateEnd' > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/rtmpproto.c:1105: > undefined > > reference to `inflateEnd' > > > > /usr/local/lib/libavformat.a(swfdec.o): In function `swf_read_packet': > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/swfdec.c:358: undefined > > reference to `uncompress' > > > > /usr/local/lib/libavformat.a(swfdec.o): In function `swf_read_header': > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/swfdec.c:147: undefined > > reference to `inflateInit_' > > > > /usr/local/lib/libavformat.a(swfdec.o): In function `zlib_refill': > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/swfdec.c:115: undefined > > reference to `inflate' > > > > /usr/local/lib/libavformat.a(swfdec.o): In function `swf_read_close': > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavformat/swfdec.c:523: undefined > > reference to `inflateEnd' > > > > /usr/local/lib/libavcodec.a(cscd.o): In function `decode_frame': > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavcodec/cscd.c:91: undefined > > reference to `uncompress' > > > > /usr/local/lib/libavcodec.a(dxa.o): In function `decode_frame': > > > > /home/ubuntu/ffmpeg_sources/ffmpeg/libavcodec/dxa.c:250: undefined > > reference to `uncompress' > > > > > > the list of undefined reference errors is quite huge. > > > > the command which i am using to link looks like this-- > > > > g++ file1.o file2.o file3.o -L/usr/lib/x86_64-linux-gnu > -L/usr/local/lib > > -L/home/ubuntu/casablanca/Release/build.release/Binaries -lpthread > > -lavutil -lavformat > > -lavcodec -lavfilter -lboost_system -lboost_thread -lboost_chrono > -lcpprest > > -lswscale -o final > > > Hmm try linking with -lzlib too. > After some trial and errors i figured out the command to make it work. i had to link lzlib, libx264, libfdk-aac ,libopus -libva to make it work. -lavformat -lavcodec -lavutil -lpthread -lz -lfdk-aac -lx264 -lopus -lswresample -lva -lboost_system -lboost_thread -lboost_chrono -lcpprest I wonder why the build worked on my mac with just following libs - -lavformat -lavcodec -lavutil -lboost_system -lboost_thread -lboost_chrono -lcpprest > > > the issue seems to be related to order of linking. is there a mistake in > > order in which i am linking the libs. > > PS - lpthread was not required when i was building on my mac. > > > > following is the output of ffmpeg -i > > > > ffmpeg version N-75410-g58fe57d Copyright (c) 2000-2015 the FFmpeg > > developers > > > > built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04) > > > > configuration: --enable-gpl --enable-libfdk-aac --enable-libx264 > > --enable-libopus --enable-nonfree > > > > libavutil 55. 2.100 / 55. 2.100 > > > > libavcodec 57. 3.100 / 57. 3.100 > > > > libavformat 57. 2.100 / 57. 2.100 > > > > libavdevice 57. 0.100 / 57. 0.100 > > > > libavfilter 6. 5.100 / 6. 5.100 > > > > libswscale 4. 0.100 / 4. 0.100 > > > > libswresample 2. 0.100 / 2. 0.100 > > > > libpostproc 54. 0.100 / 54. 0.100 > > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user >
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