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• Trouble linking own application using ffmpeg/libav

  2 mai 2019, par Kiamur

  I have a source, that I’d like to build and link against the libav library on Linux.
  I followed the compilation guide of ffmpeg here : https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
  Everything works.
  I build the included examples like this : FFmpeg : building example C codes
  It also works.

  Now, I’d like to build my own little applications, where I try to learn about using libav. My current problem is, that by using the command line

  gcc muxing.c -g -I ../../../ffmpeg_build/include/ -L ../../../ffmpeg_build/lib/ -lavdevice -lavformat -lavfilter -lavcodec -lswresample -lswscale -lavutil -lm -lz -lpthread -lfdk-aac -lmp3lame -lx264 -lva -lX11

  I get to this point :

  muxing.c: In function ‘write_audio_frame’:
  
  muxing.c:354:5: warning: ‘avcodec_encode_audio2’ is deprecated [-Wdeprecated-declarations]
  
       ret = avcodec_encode_audio2(codecContext, &pkt, frame, &got_packet);
  
       ^~~
  
  In file included from ../../../ffmpeg_build/include/libavformat/avformat.h:317:0,
  
                   from muxing.c:42:
  
  ../../../ffmpeg_build/include/libavcodec/avcodec.h:5418:5: note: declared here
  
   int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
  
       ^~~~~~~~~~~~~~~~~~~~~
  
  muxing.c: In function ‘write_video_frame’:
  
  muxing.c:524:5: warning: ‘avcodec_encode_video2’ is deprecated [-Wdeprecated-declarations]
  
       ret = avcodec_encode_video2(codecContext, &pkt, frame, &got_packet);
  
       ^~~
  
  In file included from ../../../ffmpeg_build/include/libavformat/avformat.h:317:0,
  
                   from muxing.c:42:
  
  ../../../ffmpeg_build/include/libavcodec/avcodec.h:5457:5: note: declared here
  
   int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
  
       ^~~~~~~~~~~~~~~~~~~~~
  
  /usr/bin/ld: ../../../ffmpeg_build/lib//libx264.a(opencl-8.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
  
  //lib/x86_64-linux-gnu/libdl.so.2: error adding symbols: DSO missing from command line
  
  collect2: error: ld returned 1 exit status

  Then I read, in order to overcome this linker error, I have to append -ldl to my command line, but then I get this :

  ../../../ffmpeg_build/lib//libavcodec.a(libopusdec.o): In function `libopus_flush':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:204: undefined reference to `opus_multistream_decoder_ctl'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusdec.o): In function `libopus_decode':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:169: undefined reference to `opus_multistream_decode_float'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:165: undefined reference to `opus_multistream_decode'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:174: undefined reference to `opus_strerror'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusdec.o): In function `libopus_decode_close':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:145: undefined reference to `opus_multistream_decoder_destroy'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusdec.o): In function `libopus_decode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:101: undefined reference to `opus_multistream_decoder_create'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:105: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:111: undefined reference to `opus_multistream_decoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:113: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:126: undefined reference to `opus_multistream_decoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c:129: undefined reference to `opus_strerror'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusenc.o): In function `libopus_encode':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:487: undefined reference to `opus_multistream_encode'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:483: undefined reference to `opus_multistream_encode_float'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:492: undefined reference to `opus_strerror'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusenc.o): In function `libopus_encode_close':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:530: undefined reference to `opus_multistream_encoder_destroy'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusenc.o): In function `libopus_encode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:348: undefined reference to `opus_multistream_encoder_create'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:358: undefined reference to `opus_multistream_surround_encoder_create'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:365: undefined reference to `opus_strerror'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusenc.o): In function `libopus_configure_encoder':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:121: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:123: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:128: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:131: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:134: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:136: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:139: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:142: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:145: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:148: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:153: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:156: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:161: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:164: undefined reference to `opus_strerror'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libopusenc.o): In function `libopus_encode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:410: undefined reference to `opus_multistream_encoder_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:412: undefined reference to `opus_strerror'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c:426: undefined reference to `opus_multistream_encoder_destroy'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisenc.o): In function `libvorbis_encode_frame':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:287: undefined reference to `vorbis_analysis_buffer'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:294: undefined reference to `vorbis_analysis_wrote'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:310: undefined reference to `vorbis_analysis_blockout'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:311: undefined reference to `vorbis_analysis'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:313: undefined reference to `vorbis_bitrate_addblock'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:317: undefined reference to `vorbis_bitrate_flushpacket'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:302: undefined reference to `vorbis_analysis_wrote'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisenc.o): In function `libvorbis_encode_close':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:180: undefined reference to `vorbis_analysis_wrote'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:182: undefined reference to `vorbis_block_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:183: undefined reference to `vorbis_dsp_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:184: undefined reference to `vorbis_info_clear'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisenc.o): In function `libvorbis_encode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:203: undefined reference to `vorbis_info_init'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisenc.o): In function `libvorbis_setup':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:98: undefined reference to `vorbis_encode_setup_vbr'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:107: undefined reference to `vorbis_encode_setup_managed'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:114: undefined reference to `vorbis_encode_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:121: undefined reference to `vorbis_encode_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:127: undefined reference to `vorbis_encode_ctl'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:160: undefined reference to `vorbis_encode_setup_init'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisenc.o): In function `libvorbis_encode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:208: undefined reference to `vorbis_analysis_init'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:214: undefined reference to `vorbis_block_init'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:220: undefined reference to `vorbis_comment_init'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:222: undefined reference to `vorbis_comment_add_tag'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:224: undefined reference to `vorbis_analysis_headerout'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisenc.c:257: undefined reference to `vorbis_comment_clear'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `decode_frame':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:161: undefined reference to `vpx_codec_decode'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `vpx_decode':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:221: undefined reference to `vpx_codec_get_frame'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `decode_frame':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:162: undefined reference to `vpx_codec_error'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:163: undefined reference to `vpx_codec_error_detail'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:161: undefined reference to `vpx_codec_decode'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:162: undefined reference to `vpx_codec_error'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `vpx_decode':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:222: undefined reference to `vpx_codec_get_frame'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:201: undefined reference to `vpx_codec_vp9_dx_algo'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:201: undefined reference to `vpx_codec_vp8_dx_algo'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `vpx_free':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:269: undefined reference to `vpx_codec_destroy'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:271: undefined reference to `vpx_codec_destroy'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `vpx_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:53: undefined reference to `vpx_codec_version_str'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:54: undefined reference to `vpx_codec_build_config'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:56: undefined reference to `vpx_codec_dec_init_ver'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:59: undefined reference to `vpx_codec_error'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `vp8_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:278: undefined reference to `vpx_codec_vp8_dx_algo'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxdec.o): In function `vp9_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxdec.c:298: undefined reference to `vpx_codec_vp9_dx_algo'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `vpx_encode':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:1118: undefined reference to `vpx_codec_encode'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:1126: undefined reference to `vpx_codec_encode'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `queue_frames':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:979: undefined reference to `vpx_codec_get_cx_data'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:981: undefined reference to `vpx_codec_get_cx_data'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `log_encoder_error':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:164: undefined reference to `vpx_codec_error'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:165: undefined reference to `vpx_codec_error_detail'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `codecctl_int':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:298: undefined reference to `vpx_codec_control_'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `vpx_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:524: undefined reference to `vpx_codec_get_caps'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:527: undefined reference to `vpx_codec_version_str'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:528: undefined reference to `vpx_codec_build_config'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:533: undefined reference to `vpx_codec_enc_config_default'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:534: undefined reference to `vpx_codec_err_to_string'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:719: undefined reference to `vpx_codec_enc_init_ver'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:727: undefined reference to `vpx_codec_enc_init_ver'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:812: undefined reference to `vpx_img_wrap'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:820: undefined reference to `vpx_img_wrap'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `vp8_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:1279: undefined reference to `vpx_codec_vp8_cx'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `vp9_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:1309: undefined reference to `vpx_codec_vp9_cx'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `codecctl_intp':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:320: undefined reference to `vpx_codec_control_'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpxenc.o): In function `vpx_free':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:344: undefined reference to `vpx_codec_destroy'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpxenc.c:346: undefined reference to `vpx_codec_destroy'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libx265.o): In function `libx265_encode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libx265.c:84: undefined reference to `x265_api_get_173'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libx265.c:86: undefined reference to `x265_api_get_173'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libx265.o): In function `libx265_encode_init_csp':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libx265.c:494: undefined reference to `x265_api_get_173'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libx265.c:496: undefined reference to `x265_api_get_173'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libx265.c:498: undefined reference to `x265_api_get_173'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvpx.o): In function `ff_vp9_init_static':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpx.c:73: undefined reference to `vpx_codec_vp9_cx'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvpx.c:73: undefined reference to `vpx_codec_get_caps'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisdec.o): In function `oggvorbis_decode_close':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:191: undefined reference to `vorbis_block_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:192: undefined reference to `vorbis_dsp_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:193: undefined reference to `vorbis_info_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:194: undefined reference to `vorbis_comment_clear'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisdec.o): In function `oggvorbis_decode_frame':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:169: undefined reference to `vorbis_synthesis'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:175: undefined reference to `vorbis_synthesis_pcmout'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:179: undefined reference to `vorbis_synthesis_read'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:170: undefined reference to `vorbis_synthesis_blockin'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisdec.o): In function `oggvorbis_decode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:48: undefined reference to `vorbis_info_init'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:49: undefined reference to `vorbis_comment_init'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:97: undefined reference to `vorbis_synthesis_headerin'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisdec.o): In function `oggvorbis_decode_close':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:191: undefined reference to `vorbis_block_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:192: undefined reference to `vorbis_dsp_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:193: undefined reference to `vorbis_info_clear'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:194: undefined reference to `vorbis_comment_clear'
  
  ../../../ffmpeg_build/lib//libavcodec.a(libvorbisdec.o): In function `oggvorbis_decode_init':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:109: undefined reference to `vorbis_synthesis_init'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavcodec/libvorbisdec.c:110: undefined reference to `vorbis_block_init'
  
  ../../../ffmpeg_build/lib//libavutil.a(hwcontext_vaapi.o): In function `vaapi_device_create':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:1490: undefined reference to `vaGetDisplay'
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:1514: undefined reference to `vaGetDisplayDRM'
  
  ../../../ffmpeg_build/lib//libavutil.a(hwcontext_vaapi.o): In function `vaapi_device_derive':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vaapi.c:1561: undefined reference to `vaGetDisplayDRM'
  
  ../../../ffmpeg_build/lib//libavutil.a(hwcontext_vdpau.o): In function `vdpau_device_create':
  
  /home/ritter/ffmpeg_sources/ffmpeg/libavutil/hwcontext_vdpau.c:461: undefined reference to `vdp_device_create_x11'
  
  collect2: error: ld returned 1 exit status

  So, what can I do, to get it compiled and linked fully ?

• FFMPEG source compilation failed with Android NDK Clang compiler (r16b) with error "the clang compiler does not support '-mcpu=arm'"

  10 juillet 2018, par Prasaathviki

  while compiling FFMPEG source with Android NDK Clang compiler (r16b), I’m getting compiler error.

  for the below config :

  ./configure \
  
  --prefix=/home/prasaathviki/Desktop/ffmpeg/bin/android/26/arm64_26 \
  
  --cross- 
  
  prefix=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android- \
  
  --sysroot="/home/prasaathviki/Desktop/depends/android/ndk/mytoolchains/r16b/arm64_26/sysroot" \
  
  --disable-static \
  
  --disable-doc \
  
  --disable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-symver \
  
  --enable-shared \
  
  --enable-protocol=concat \
  
  --enable-protocol=file \
  
  --enable-muxer=mp4 \
  
  --enable-demuxer=mpegts \
  
  --target-os=android \
  
  --enable-decoder=h264 \
  
  --enable-cross-compile \
  
  --arch=arm \
  
  --cpu=arm \
  
  --toolchain=clang-usan \
  
  --extra-cflags="-fPIE -fPIC -ffast-math -funroll-loops -mfloat-abi=softfp -mfpu=vfpv3-d16" \
  
  --extra-ldflags="-pie" \
  
  --cc=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-clang \
  
  --cxx=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-clang++ \
  
  --ld=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-ld \
  
  --as=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-clang \
  
  --ar=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-ar \
  
  --strip=/home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-strip

  In ffbuild/Config.log i’m getting this below error..

  /home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-clang --sysroot=/home/prasaathviki/Desktop/depends/android/ndk/mytoolchains/r16b/arm64_26/sysroot -fsanitize=undefined -fPIE -fPIC -ffast-math -funroll-loops -mfloat-abi=softfp -mfpu=vfpv3-d16 -mcpu=arm -c -o /tmp/ffconf.Hn6wyaNC/test.o /tmp/ffconf.Hn6wyaNC/test.c
  
  clang50: error: the clang compiler does not support '-mcpu=arm'
  
  C compiler test failed.

  Also i have tried without —cpu flag, but still it reported an error as below

  /home/prasaathviki/Desktop/ndk/mytoolchains/r16b/arm64_26/bin/aarch64-linux-android-clang --sysroot=/home/prasaathviki/Desktop/depends/android/ndk/mytoolchains/r16b/arm64_26/sysroot -fsanitize=undefined -fPIE -fPIC -ffast-math -funroll-loops -mfloat-abi=softfp -mfpu=vfpv3-d16 -mcpu= -c -o /tmp/ffconf.gQNwoHgC/test.o /tmp/ffconf.gQNwoHgC/test.c
  
  clang50: warning: joined argument expects additional value: '-mcpu=' [-Wunused-command-line-argument]
  
  clang50: error: the clang compiler does not support '-mcpu='
  
  C compiler test failed.

  Please help me to resolve this issue. Thanks.

• ERROR : libmp3lame >= 3.98.3 not found

  12 mai 2018, par Prasad Revanaki

  I am installing ffmpeg utility, but I am facing libmp3lame >= 3.98.3 not found not found error. I am able to find lame-3.99.5-1.el6.rf.x86_64.rpm and lame-libs-3.98.4-1.el6.nux.x86_64.rpm but installing these are not solving the problem. I am not able to find libmp3lame rpm to install.

  Can anyone help me here ?

  [root@sdp-dev-03 :/opt/ffmpeg] # ./configure —prefix="$HOME/ffmpeg_build" —extra-cflags="-I$HOME/ffmpeg_build/include" —extra-ldflags="-L$HOME/ffmpeg_build/lib" —bindir="$HOME/bin" —extra-libs=-ldl —enable-version3 —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libvpx —enable-libfaac —enable-libmp3lame —enable-libtheora —enable-libvorbis —enable-libx264 —enable-libvo-aacenc —enable-libxvid —disable-ffplay —enable-gpl —enable-postproc —enable-nonfree —enable-avfilter —enable-pthreads

  ERROR : libmp3lame >= 3.98.3 not found

  If you think configure made a mistake, make sure you are using the latest
  version from Git. If the latest version fails, report the problem to the
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  Include the log file "config.log" produced by configure as this will help
  solve the problem.