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  • Ecrire une actualité

    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
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  • D’autres logiciels intéressants

    12 avril 2011, par

    On ne revendique pas d’être les seuls à faire ce que l’on fait ... et on ne revendique surtout pas d’être les meilleurs non plus ... Ce que l’on fait, on essaie juste de le faire bien, et de mieux en mieux...
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  • Anomalie #2089 : Bug du formulaire ajouter un auteur à un article

    15 juin 2011, par cedric -

    Ah, c’est typiquement suhosin qui coupe les requetes avec le contexte ajax car suspicion d’attaque. Il y a un fix experimental qui consiste a ajouter un define(’_CACHE_CONTEXTES_AJAX’,true) dans mes_options.php Du coup, les contextes ajax sont ecrits sur le disque et seul une clé md5 est (...)

  • avcodec/cbs_mpeg2 : Simplify splitting fragment

    4 février 2022, par Andreas Rheinhardt
    avcodec/cbs_mpeg2 : Simplify splitting fragment

    avpriv_find_start_code() supports non-contiguous buffers
    
by maintaining a state that allows to find start codes
    
that span across multiple buffers ; a consequence thereof
    
is that avpriv_find_start_code() is given a zero-sized
    
buffer, it does not modify this state, so that it appears
    
as if a start code was found if the state contained a start code.
    

    This can e.g. happen with Sequence End units in MPEG-2 and
    
to counter this, cbs_mpeg2_split_fragment() reset the state
    
when it has already encountered the end of the fragment
    
in order to add the last unit (if it is only of the form 00 00 01 xy)
    
only once ; it also used a flag to set whether this is the final unit.
    

    Yet this can be improved by simply resetting state unconditionally
    
(thereby avoiding a branch) ; the flag can be removed by just checking
    
whether we have a valid start code (of the next unit to add)
    
at the end.
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavcodec/cbs_mpeg2.c

  • ffmpeg link error with CodeBlocks

    12 juillet 2016, par Yoohoo

    Hi，I am currently doing a real time video encoding c program using ffmpeg, initially I encountered a lot of "undefined reference" error, after I set the linker in build options, some error got disappeared, but still some error remains.

    ||=== Build: Debug in c_3rd party encoding (compiler: GNU GCC Compiler)     ===|
    
/home/yonghao/codeblocksfile/c_3rd party encoding/main.c||In function     ‘init_video_encode’:|
    
/home/yonghao/codeblocksfile/c_3rd party encoding/main.c|73|warning: ‘avcodec_alloc_frame’ is deprecated (declared at ../../ffmpeg_build/include/libavcodec/avcodec.h:3618) [-Wdeprecated-declarations]|
    
/home/yonghao/codeblocksfile/c_3rd party encoding/main.c||In function ‘cancle_encode’:|
    
/home/yonghao/codeblocksfile/c_3rd party encoding/main.c|134|warning: ‘avcodec_free_frame’ is deprecated (declared at ../../ffmpeg_build/include/libavcodec/avcodec.h:3643) [-Wdeprecated-declarations]|
    
/home/yonghao/codeblocksfile/c_3rd party encoding/main.c|21|warning: ‘endcode’ defined but not used [-Wunused-variable]|
    
../../ffmpeg_build/lib/libavcodec.a(libmp3lame.o)||In function `mp3lame_encode_frame':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|211|undefined reference to `lame_encode_buffer_float'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|195|undefined reference to `lame_encode_buffer'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|198|undefined reference to `lame_encode_buffer_int'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|219|undefined reference to `lame_encode_flush'|
    
../../ffmpeg_build/lib/libavcodec.a(libmp3lame.o)||In function `mp3lame_encode_close':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|86|undefined reference to `lame_close'|
    
../../ffmpeg_build/lib/libavcodec.a(libmp3lame.o)||In function `mp3lame_encode_init':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|98|undefined reference to `lame_init'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|102|undefined reference to `lame_set_num_channels'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|103|undefined reference to `lame_set_mode'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|106|undefined reference to `lame_set_in_samplerate'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|107|undefined reference to `lame_set_out_samplerate'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|111|undefined reference to `lame_set_quality'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|115|undefined reference to `lame_set_VBR'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|116|undefined reference to `lame_set_VBR_quality'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|120|undefined reference to `lame_set_VBR'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|121|undefined reference to `lame_set_VBR_mean_bitrate_kbps'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|123|undefined reference to `lame_set_brate'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|128|undefined reference to `lame_set_bWriteVbrTag'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|131|undefined reference to `lame_set_disable_reservoir'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|134|undefined reference to `lame_init_params'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|140|undefined reference to `lame_get_encoder_delay'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libmp3lame.c|143|undefined reference to `lame_get_framesize'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusdec.o)||In function `libopus_flush':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|178|undefined reference to `opus_multistream_decoder_ctl'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusdec.o)||In function `libopus_decode':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|143|undefined reference to `opus_multistream_decode_float'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|139|undefined reference to `opus_multistream_decode'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|148|undefined reference to `opus_strerror'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusdec.o)||In function `libopus_decode_close':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|121|undefined reference to `opus_multistream_decoder_destroy'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusdec.o)||In function `libopus_decode_init':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|87|undefined reference to `opus_multistream_decoder_create'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|91|undefined reference to `opus_strerror'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|97|undefined reference to `opus_multistream_decoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusdec.c|99|undefined reference to `opus_strerror'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusenc.o)||In function `libopus_encode':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|346|undefined reference to `opus_multistream_encode'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|342|undefined reference to `opus_multistream_encode_float'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|351|undefined reference to `opus_strerror'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusenc.o)||In function `libopus_encode_close':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|389|undefined reference to `opus_multistream_encoder_destroy'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusenc.o)||In function `libopus_encode_init':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|254|undefined reference to `opus_multistream_encoder_create'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|260|undefined reference to `opus_strerror'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusenc.o)||In function `libopus_configure_encoder':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|117|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|119|undefined reference to `opus_strerror'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|124|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|127|undefined reference to `opus_strerror'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|130|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|132|undefined reference to `opus_strerror'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|135|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|138|undefined reference to `opus_strerror'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|141|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|144|undefined reference to `opus_strerror'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|149|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|152|undefined reference to `opus_strerror'|
    
../../ffmpeg_build/lib/libavcodec.a(libopusenc.o)||In function `libopus_encode_init':|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|288|undefined reference to `opus_multistream_encoder_ctl'|
    
/home/yonghao/ffmpeg_sources/ffmpeg/libavcodec/libopusenc.c|290|undefined reference to `opus_strerror'|
    
||More errors follow but not being shown.|
    
||Edit the max errors limit in compiler options...|
    
||=== Build failed: 50 error(s), 3 warning(s) (0 minute(s), 3 second(s)) ===|

    Here are my screen shot of the CodeBlock linker setting.

    ffmpeg_build/lib/libvpx.a
    
ffmpeg_build/lib/libswscale.a
    
ffmpeg_build/lib/libwresample.a
    
ffmpeg_build/lib/libpostproc.a
    
ffmpeg_build/lib/libfdk-aac.a
    
ffmpeg_build/lib/libvutil.a
    
ffmpeg_build/lib/libvformat.a
    
ffmpeg_build/lib/libavfilter.a
    
ffmpeg_build/lib/libavdevice.a
    
ffmpeg_build/lib/libavcodec.a

    Totally 10 libs.

    My Questions :

    1. Are these errors caused by lacking libs or libs not linked.
    2. What libs I missing or what libs should I add to linker.

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