Recherche avancée

Médias (2)

Mot : - Tags -/doc2img

Autres articles (67)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Possibilité de déploiement en ferme

    12 avril 2011, par

    MediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
    Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

Sur d’autres sites (9302)

  • "undefined reference to " when calling ffmpeg1.2.1 in Cplusplus using ANDROID NDK

    21 mars 2014, par wolfz

    when i call ffmpeg1.2.1 lib in Cplusplus wrapper with android NDK, some symbols cannot be linked ,the errors occur when linking as follows. but the other symbols can be linked,why ? how to correct the mistake ?

    SharedLibrary  : libplayer.so
    
/home/mytest/player/jni/lib/DllAvCodec.h:124: error: undefined reference to 'avcodec_string(char*, int, AVCodecContext*, int)'
    
/home/mytest/player/jni/lib/DllAvCodec.h:124: error: undefined reference to 'avcodec_string(char*, int, AVCodecContext*, int)'
    
/home/mytest/player/jni/lib/DllAvCodec.h:124: error: undefined reference to 'avcodec_string(char*, int, AVCodecContext*, int)'
    
/home/mytest/player/jni/lib/DllAvCodec.h:144: error: undefined reference to 'av_free_packet(AVPacket*)'
    
/home/mytest/player/jni/cores/player/Demuxers/DemuxFFmpeg.cpp:248: error: undefined reference to 'av_log_set_callback(void (*)(void*,mytestt*,     std::__va_list))'
    
/home/mytest/player/jni/lib/DllAvCodec.h:144: error: undefined reference to 'av_free_packet(AVPacket*)'
    
/home/mytest/player/jni/cores/player/Demuxers/DemuxFFmpeg.cpp:701: error: undefined reference to 'av_free_packet(AVPacket*)'
    
/home/mytest/player/jni/cores/player/Demuxers/DemuxFFmpeg.cpp:798: error: undefined reference to 'av_free_packet(AVPacket*)'
    
/home/mytest/player/jni/lib/DllAvCodec.h:108: error: undefined reference to 'avcodec_find_decoder(AVCodecID)'
    
clang++: error: linker command failed with exit code 1 (use -v to see invocation)    

    my android.mk is :

    LOCAL_PATH := $(call my-dir)
    
DEFINES += \
    
           -DTARGET_POSIX \
    
           -DTARGET_LINUX \
    
           -D_LINUX \
    
           -DTARGET_ANDROID \
    
           -D__STDC_CONSTANT_MACROS 
    

    
######################################
    
#build ffmpeg prebuilt lib
    
######################################
    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libavcodec
    
LOCAL_SRC_FILES :=lib/lib/libavcodec.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libavfilter  
    
LOCAL_SRC_FILES :=lib/lib/libavfilter.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libavformat  
    
LOCAL_SRC_FILES :=lib/lib/libavformat.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libavutil  
    
LOCAL_SRC_FILES :=lib/lib/libavutil.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libpostproc  
    
LOCAL_SRC_FILES :=lib/lib/libpostproc.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libswresample  
    
LOCAL_SRC_FILES :=lib/lib/libswresample.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    
include $(CLEAR_VARS)  
    
LOCAL_MODULE := libswscale  
    
LOCAL_SRC_FILES := lib/lib/libswscale.a
    
include $(PREBUILT_STATIC_LIBRARY)
    

    

    
######################################
    
#build lib
    
######################################
    
include $(CLEAR_VARS)
    
LOCAL_MODULE:= player
    
base := $(LOCAL_PATH)
    

    
LOCAL_SRC_FILES += ... #ignore
    

    

    
LOCAL_C_INCLUDES += $(LOCAL_PATH) \
    
            $(LOCAL_PATH)/lib \
    
            $(LOCAL_PATH)/lib/include \
    
            $(LOCAL_PATH)/cores/dvdplayer \
    

    
LOCAL_CPPFLAGS += -Wall -fexceptions $(DEFINES)
    

    
LOCAL_STATIC_LIBRARIES := libavformat libavcodec libavfilter  \
    
                          libavutil libpostproc libswscale libswresample 
    

    
LOCAL_LDLIBS += -llog -lz 
    
LOCAL_LDFLAGS += -L../jni/lib/lib  
    

    
include $(BUILD_SHARED_LIBRARY)

    the DllAvcodec.h is :

    #pragma once
    

    

    
#include "DllAvUtil.h"
    
#include "utils/log.h"
    
#define USE_EXTERNAL_FFMPEG  1
    

    
extern "C" {
    
  #include <libavcodec></libavcodec>avcodec.h>
    
}
    

    
#if LIBAVCODEC_VERSION_MICRO >= 100
    
  #define LIBAVCODEC_FROM_FFMPEG
    
#else
    
  #define LIBAVCODEC_FROM_LIBAV
    
#endif
    

    
#include "threads/SingleLock.h"
    

    
class DllAvCodecInterface
    
{
    
public:
    
  virtual ~DllAvCodecInterface() {}
    
  virtual void avcodec_register_all(void)=0;
    
  virtual void avcodec_flush_buffers(AVCodecContext *avctx)=0;
    
  virtual int avcodec_open2_dont_call(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)=0;
    
  virtual AVCodec *avcodec_find_decoder(enum CodecID id)=0;
    
  virtual AVCodec *avcodec_find_encoder(enum CodecID id)=0;
    
  virtual int avcodec_close_dont_call(AVCodecContext *avctx)=0;
    
  virtual AVFrame *avcodec_alloc_frame(void)=0;
    
  virtual int avpicture_fill(AVPicture *picture, uint8_t *ptr, PixelFormat pix_fmt, int width, int height)=0;
    
  virtual int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt)=0;
    
  virtual int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)=0;
    
  virtual int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)=0;
    
  ///virtual int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, const short *samples)=0;
    
  ///virtual int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)=0;
    
  virtual int avpicture_get_size(PixelFormat pix_fmt, int width, int height)=0;
    
  virtual AVCodecContext *avcodec_alloc_context3(AVCodec *codec)=0;
    
  virtual void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)=0;
    
  virtual void avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec)=0;
    
  virtual AVCodecParserContext *av_parser_init(int codec_id)=0;
    
  virtual int av_parser_parse2(AVCodecParserContext *s,AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size,
    
                    const uint8_t *buf, int buf_size,
    
                    int64_t pts, int64_t dts, int64_t pos)=0;
    
  virtual void av_parser_close(AVCodecParserContext *s)=0;
    
  virtual AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)=0;
    
  virtual int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
    
    AVCodecContext *avctx, const char *args,
    
    uint8_t **poutbuf, int *poutbuf_size,
    
    const uint8_t *buf, int buf_size, int keyframe) =0;
    
  virtual void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc) =0;
    
  virtual void avpicture_free(AVPicture *picture)=0;
    
  virtual void av_free_packet(AVPacket *pkt)=0;
    
  virtual int avpicture_alloc(AVPicture *picture, PixelFormat pix_fmt, int width, int height)=0;
    
  virtual enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt)=0;
    
  virtual int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic)=0;
    
  virtual void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)=0;
    
  virtual AVCodec *av_codec_next(AVCodec *c)=0;
    
  virtual int av_dup_packet(AVPacket *pkt)=0;
    
  virtual void av_init_packet(AVPacket *pkt)=0;
    
  virtual int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align) = 0;
    
  virtual void avcodec_free_frame(AVFrame **frame)=0;
    
};
    

    

    
// Use direct layer
    
class DllAvCodec : public DllAvCodecInterface
    
{
    
public:
    
  static CCriticalSection m_critSection;
    

    
  virtual ~DllAvCodec() {}
    
  virtual void avcodec_register_all()
    
  {
    
    CSingleLock lock(DllAvCodec::m_critSection);
    
    ::avcodec_register_all();
    
  }
    
  virtual void avcodec_flush_buffers(AVCodecContext *avctx) { ::avcodec_flush_buffers(avctx); }
    
  virtual int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
    
  {
    
    CSingleLock lock(DllAvCodec::m_critSection);
    
    return ::avcodec_open2(avctx, codec, options);
    
  }
    
  virtual int avcodec_open2_dont_call(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options) { *(volatile int *)0x0 = 0; return 0; }
    
  virtual int avcodec_close_dont_call(AVCodecContext *avctx) { *(volatile int *)0x0 = 0; return 0; }
    
  virtual AVCodec *avcodec_find_decoder(enum CodecID id) { return ::avcodec_find_decoder(id); }
    
  virtual AVCodec *avcodec_find_encoder(enum CodecID id) { return ::avcodec_find_encoder(id); }
    
  virtual int avcodec_close(AVCodecContext *avctx)
    
  {
    
    CSingleLock lock(DllAvCodec::m_critSection);
    
    return ::avcodec_close(avctx);
    
  }
    
  virtual AVFrame *avcodec_alloc_frame() { return ::avcodec_alloc_frame(); }
    
  virtual int avpicture_fill(AVPicture *picture, uint8_t *ptr, PixelFormat pix_fmt, int width, int height) { return ::avpicture_fill(picture, ptr, pix_fmt, width, height); }
    
  virtual int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt) { return ::avcodec_decode_video2(avctx, picture, got_picture_ptr, avpkt); }
    
  virtual int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt) { return ::avcodec_decode_audio4(avctx, frame, got_frame_ptr, avpkt); }
    
  virtual int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt) { return ::avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, avpkt); }
    
  ///virtual int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, const short *samples) { return ::avcodec_encode_audio(avctx, buf, buf_size, samples); }
    
  ///virtual int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) { return ::avcodec_encode_audio2(avctx, avpkt, frame, got_packet_ptr); }
    
  virtual int avpicture_get_size(PixelFormat pix_fmt, int width, int height) { return ::avpicture_get_size(pix_fmt, width, height); }
    
  virtual AVCodecContext *avcodec_alloc_context3(AVCodec *codec) { return ::avcodec_alloc_context3(codec); }
    
  virtual void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode) { ::avcodec_string(buf, buf_size, enc, encode); }
    
  virtual void avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec) { ::avcodec_get_context_defaults3(s, codec); }
    

    
  virtual AVCodecParserContext *av_parser_init(int codec_id) { return ::av_parser_init(codec_id); }
    
  virtual int av_parser_parse2(AVCodecParserContext *s,AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size,
    
                    const uint8_t *buf, int buf_size,
    
                    int64_t pts, int64_t dts, int64_t pos)
    
  {
    
    return ::av_parser_parse2(s, avctx, poutbuf, poutbuf_size, buf, buf_size, pts, dts, pos);
    
  }
    
  virtual void av_parser_close(AVCodecParserContext *s) { ::av_parser_close(s); }
    

    
  virtual AVBitStreamFilterContext *av_bitstream_filter_init(const char *name) { return ::av_bitstream_filter_init(name); }
    
  virtual int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
    
    AVCodecContext *avctx, const char *args,
    
    uint8_t **poutbuf, int *poutbuf_size,
    
    const uint8_t *buf, int buf_size, int keyframe) { return ::av_bitstream_filter_filter(bsfc, avctx, args, poutbuf, poutbuf_size, buf, buf_size, keyframe); }
    
  virtual void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc) { ::av_bitstream_filter_close(bsfc); }
    

    
  virtual void avpicture_free(AVPicture *picture) { ::avpicture_free(picture); }
    
  virtual void av_free_packet(AVPacket *pkt) { ::av_free_packet(pkt); }
    
  virtual int avpicture_alloc(AVPicture *picture, PixelFormat pix_fmt, int width, int height) { return ::avpicture_alloc(picture, pix_fmt, width, height); }
    
  virtual int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic) { return ::avcodec_default_get_buffer(s, pic); }
    
  virtual void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic) { ::avcodec_default_release_buffer(s, pic); }
    
  virtual enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt) { return ::avcodec_default_get_format(s, fmt); }
    
  virtual AVCodec *av_codec_next(AVCodec *c) { return ::av_codec_next(c); }
    

    
  virtual int av_dup_packet(AVPacket *pkt) { return ::av_dup_packet(pkt); }
    
  virtual void av_init_packet(AVPacket *pkt) { return ::av_init_packet(pkt); }
    
  virtual int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align) { return ::avcodec_fill_audio_frame(frame, nb_channels, sample_fmt, buf, buf_size, align); }
    
  virtual void avcodec_free_frame(AVFrame **frame) { return ::avcodec_free_frame(frame); };
    

    
};

  • ClassX installation "codec not found" due to dependencies [migrated]

    25 mars 2014, par khateeb

    ClassX is an interactive lecture streaming system developed in the Electrical Engineering Department at Stanford University.
    Unlike conventional lecture capturing systems, ClassX requires very simple consumer-grade equipment and minimal human operation.

    I faced problems during installing it, I hope you have a solution.

    BTW : I successfully installed it 2 years ago, but now I think the problem as the dependencies and Ubuntu versions are different than the versions we used two years ago.

    Detailed description of the problem :

    • I’m using Ubuntu 12.04
    • I followed the instructions @ ClassX installation guide, and all steps till step 4 are successfully done (the encoder bin file generated).
    • When trying to encode the video using the classX web system, it shows the encoding completed after few seconds.However, there are no tiles generated.

    • I tried to execute the command at CX_log.txt, and the following error appears.

      mahmoud@Mahmoud-HP-Pavilion-dv5-Notebook-PC : $ sudo perl /var/www/ClassXWebSystem/system/publishers/web/actions/encode.pl "/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/lecSEven" "/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/.encoding_1372706251" "/var/www/ClassXWebSystem/content/streaming/FALL_2013_2014/CS106A_FALL_2013_2014/lecSEven" "/var/www/ClassXWebSystem/system/publishers/bin" classx y n n
      [sudo] password for mahmoud :
      00068.jpg
      ..
      .
      00068.mp4
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/.encoding_1372706251/00068.mp4’ :
      Metadata :
      major_brand : isom
      minor_version : 512
      compatible_brands : isomiso2avc1mp41
      encoder : Lavf52.39.0
      Duration : 00:02:30.05, start : 0.000000, bitrate : 8141 kb/s
      Stream #0.0(und) : Video : h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 8007 kb/s, 29.95 fps, 29.97 tbr, 2997 tbn, 59.94 tbc
      Stream #0.1(und) : Audio : aac, 44100 Hz, stereo, s16, 128 kb/s
      Output #0, mp4, to ’/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/.encoding_1372706251/stream0.mp4’ :
      Stream #0.0 : Video : [0][0][0][0] / 0x0000, yuv420p, 640x360, q=32-36, 64 kb/s, 90k tbn, 14.99 tbc
      codec not found

  • ClassX installation "codec not found" due to dependencies [migrated]

    25 mars 2014, par khateeb

    ClassX is an interactive lecture streaming system developed in the Electrical Engineering Department at Stanford University.
    Unlike conventional lecture capturing systems, ClassX requires very simple consumer-grade equipment and minimal human operation.

    I faced problems during installing it, I hope you have a solution.

    BTW : I successfully installed it 2 years ago, but now I think the problem as the dependencies and Ubuntu versions are different than the versions we used two years ago.

    Detailed description of the problem :

    • I'm using Ubuntu 12.04
    • I followed the instructions @ ClassX installation guide, and all steps till step 4 are successfully done (the encoder bin file generated).
    • When trying to encode the video using the classX web system, it shows the encoding completed after few seconds.However, there are no tiles generated.

    • I tried to execute the command at CX_log.txt, and the following error appears.

      mahmoud@Mahmoud-HP-Pavilion-dv5-Notebook-PC : $ sudo perl /var/www/ClassXWebSystem/system/publishers/web/actions/encode.pl "/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/lecSEven" "/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/.encoding_1372706251" "/var/www/ClassXWebSystem/content/streaming/FALL_2013_2014/CS106A_FALL_2013_2014/lecSEven" "/var/www/ClassXWebSystem/system/publishers/bin" classx y n n
      [sudo] password for mahmoud :
      00068.jpg
      ..
      .
      00068.mp4
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/.encoding_1372706251/00068.mp4' :
      Metadata :
      major_brand : isom
      minor_version : 512
      compatible_brands : isomiso2avc1mp41
      encoder : Lavf52.39.0
      Duration : 00:02:30.05, start : 0.000000, bitrate : 8141 kb/s
      Stream #0.0(und) : Video : h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 8007 kb/s, 29.95 fps, 29.97 tbr, 2997 tbn, 59.94 tbc
      Stream #0.1(und) : Audio : aac, 44100 Hz, stereo, s16, 128 kb/s
      Output #0, mp4, to '/var/www/ClassXWebSystem/content/encoding/FALL_2013_2014/CS106A_FALL_2013_2014/.encoding_1372706251/stream0.mp4' :
      Stream #0.0 : Video : [0][0][0][0] / 0x0000, yuv420p, 640x360, q=32-36, 64 kb/s, 90k tbn, 14.99 tbc
      codec not found

Navigation