Recherche avancée

Sur d’autres sites (9212)

• How can I decrypt this m3u8 and key file to mp4, Maybe its use javascript to decryptdata

  23 décembre 2020, par lionkinglk

  THIS is the video website :
the video website link

  


  From this video link, I download the m3u8, key.key and ts video files, and use FFMPEG to transform these files to mp4.
but Error :

  


  ffmpeg -allowed_extensions ALL -i a.m3u8 -c copy 01.mp4
ffmpeg version N-94813-g85386c36e3-ffmpeg-for-N_m3u8DL-CLI Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.2.0 (GCC)
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 56.101 / 58. 56.101
  libavformat    58. 32.104 / 58. 32.104
  libavfilter     7. 58.102 /  7. 58.102
  libavresample   4.  0.  0 /  4.  0.  0
  libswresample   3.  6.100 /  3.  6.100
[hls @ 007e3000] Skip ('#EXT-X-VERSION:3')
[hls @ 007e3000] Skip ('#EXT-X-ALLOW-CACHE:YES')
[hls @ 007e3000] Opening 'a.key' for reading
[hls @ 007e3000] Opening 'crypto:43924590506ad94e644d0bfac89e14b9_2_0.ts' for reading
[hls @ 007e3000] Opening 'crypto:43924590506ad94e644d0bfac89e14b9_2_1.ts' for reading
[hls @ 007e3000] Error when loading first segment '43924590506ad94e644d0bfac89e14b9_2_0.ts'
a.m3u8: Invalid data found when processing input


  


  The key file is

  


  00000000h: 46 F5 50 A3 7A 46 85 B5 8C 17 5B 0E 4B 8D F5 49 ; F鮌F叺?[.K嶕I
00000010h: F1 02 79 41 58 C7 A3 D3 17 90 0D D6 27 67 D6 D0 ; ?yAX牵???g中


  


  and the IV value in the m3u8 file is

  


  IV=0x786d9270e353d8758b621c1f775491f2


  


  Too long bytes to FFMPEG.

  


  ---

  


  In my limited experience with html and javascript, I found the Chrome blob a random named javascript file when the website page freshed.

  


  Chrome - Network log :

  


  XHR:43924590506ad94e644d0bfac89e14b9_2.m3u8?pid=1608691204584X1511260&device=desktop
XHR:43924590506ad94e644d0bfac89e14b9_2.key?token=1df110e5-ff1d-42de-bd39-b63304bb3062-53648385
XHR:43924590506ad94e644d0bfac89e14b9_2_0.ts?pid=1608691204584X1511260&device=desktop
Other:blob:https://www.sciconf.cn/93ebcbe3-0211-4ec0-94df-421024e8b505



  


  Some codes in the javascript file (blob:https://www.sciconf.cn/93ebcbe3-0211-4ec0-94df-421024e8b505)like :

  


  o = function() {
                function t(t, e, i, n) {
                    this.decryptdata = i,
                    this.discardEPB = n,
                    this.decrypter = new v.a(t,e,{
                        removePKCS7Padding: !1
                    })
                }
                var e = t.prototype;
                return e.decryptBuffer = function(t, e) {
                    this.decrypter.decrypt(t, this.decryptdata.key.buffer, this.decryptdata.iv.buffer, e)
                }


  


  I think the website use this js file to decrypt the key file and the IV value, but I can't add breakpoint to the random named js file.

  


  ---

  


  I am studying this for a long time, but no use.

  


  Please help or try to give some ideas how to achieve the decrypted key and IV ?

  


  Thanks in advance.

  


• confused about lhls in ffmpeg

  27 décembre 2020, par JohnL

  I am more than a little confused about trying to use the experimental lhls option in ffmpeg.

  


  I have built ffmpeg from source (which takes a while), and currently have version 4.1.6 running.

  


  Reading other threads here, and the ffmpeg docs, it appears that the lhls option is available only in the Dash muxer.

  


  I gravitated to HLS because of its support in Apple devices, and I thought that lhls was related (and Apple was drafting the spec).

  


  Then there is the comment in the ffmpeg docs that states that the hls.js folks are working on supporting lhls in their library, which I also use to support browsers like Chrome.

  


  Should I be using dash instead of hls for my prototype ? I want to try and get very low latency for a construction inspection app I am considering building. Right now, the latency I am seeing is 10-15 seconds.

  


  Any insights would be appreciated. TIA

  


  See my comment below. I have many of the dash format flags working, but can't get -lhls to work. Here are some of the build flags used :

  


  conversion : avcodec configuration : —prefix=/usr —extra-version='1 deb10u1+rpt1' —toolchain=hardened —incdir=/usr/include/arm-linux-gnueabihf —enable-gpl —disable-stripping —enable-avresample —disable-filter=resample —enable-avisynth —enable-gnutls —enable-ladspa —enable-libaom —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libcdio —enable-libcodec2 —enable-libflite —enable-libfontconfig —enable-libfreetype —enable-libfribidi —enable-libgme —enable-libgsm —enable-libjack —enable-libmp3lame —enable-libmysofa —enable-libopenjpeg —enable-libopenmpt —enable-libopus —enable-libpulse —enable-librsvg —enable-librubberband —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libssh —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx265 —enable-libxml2 —enable-libxvid —enable-libzmq —enable-libzvbi —enable-lv2 —enable-omx —enable-openal —enable-opengl —enable-sdl2 —enable-omx-rpi —enable-mmal —enable-neon —enable-rpi —enable-libdc1394 —enable-libdrm —enable-libiec61883 —enable-chromaprint —enable-frei0r —enable-libx264 —libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp —cpu=cortex-a7 —arch=armv6t2 —disable-thumb —enable-shared —disable-doc —disable-programs

  


• FFmpeg fails to build : pocketsphinx (implicit declaration of function 'ps_get_in_speech' is invalid in C99)

  12 janvier 2020, par Joy Jin

  I’m building FFmpeg version 4.2.2 on macOS High Sierra 10.13.6. The configuration is :

  configure --enable-gpl --enable-version3 --enable-nonfree --enable-gray --enable-chromaprint --enable-frei0r --enable-gcrypt --enable-gmp --enable-ladspa --enable-libaom --enable-libaribb24 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdavs2 --enable-libdc1394 --enable-libfdk-aac --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libjack --enable-libklvanc --enable-libkvazaar --enable-liblensfun --enable-libmodplug  --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencv --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-librtmp --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex  --enable-libsrt --enable-libssh --enable-libtensorflow --enable-libtesseract --enable-libtheora  --enable-libtwolame  --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxavs2 --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-libxvid  --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-decklink --enable-libmysofa --enable-openal --enable-opencl --enable-opengl --enable-openssl --enable-pocketsphinx --enable-vapoursynth

  Make gives me the following error :

  CC  libavfilter/af_asr.o
  
  libavfilter/af_asr.c:72:19: error: implicit declaration of function
  
        'ps_get_in_speech' is invalid in C99
  
        [-Werror,-Wimplicit-function-declaration]
  
      have_speech = ps_get_in_speech(s->ps);
  
                    ^
  
  libavfilter/af_asr.c:72:19: warning: this function declaration is not a
  
        prototype [-Wstrict-prototypes]
  
  libavfilter/af_asr.c:77:40: error: too few arguments to function call, expected
  
        3, have 2
  
          speech = ps_get_hyp(s->ps, NULL);
  
                   ~~~~~~~~~~            ^
  
  /opt/local/include/pocketsphinx/pocketsphinx.h:449:1: note: 'ps_get_hyp'
  
        declared here
  
  char const *ps_get_hyp(ps_decoder_t *ps, int32 *out_best_score,
  
  ^
  
  libavfilter/af_asr.c:80:27: error: too few arguments to function call, expected
  
        2, have 1
  
          ps_start_utt(s->ps);
  
          ~~~~~~~~~~~~      ^
  
  /opt/local/include/pocketsphinx/pocketsphinx.h:363:1: note: 'ps_start_utt'
  
        declared here
  
  int ps_start_utt(ps_decoder_t *ps, char const *uttid);
  
  ^
  
  libavfilter/af_asr.c:92:23: error: too few arguments to function call, expected
  
        2, have 1
  
      ps_start_utt(s->ps);
  
      ~~~~~~~~~~~~      ^
  
  /opt/local/include/pocketsphinx/pocketsphinx.h:363:1: note: 'ps_start_utt'
  
        declared here
  
  int ps_start_utt(ps_decoder_t *ps, char const *uttid);
  
  ^
  
  libavfilter/af_asr.c:116:5: error: implicit declaration of function
  
        'ps_default_search_args' is invalid in C99
  
        [-Werror,-Wimplicit-function-declaration]
  
      ps_default_search_args(s->config);
  
      ^
  
  libavfilter/af_asr.c:116:5: warning: this function declaration is not a
  
        prototype [-Wstrict-prototypes]
  
  2 warnings and 5 errors generated.
  
  make: *** [libavfilter/af_asr.o] Error 1

  This issue does not appear if I remove —enable-pocketsphinx from the configure argument.

  I built and installed sphinxbase from the source, and I used macport’s pocketsphinx version because building from source failed. These two issues might be related.

  acmod.c:1037:34: error: too many arguments provided to function-like macro
  
        invocation
  
              acmod->senscr_frame, acmod->n_senone_active);
  
                                   ^
  
  /usr/local/include/sphinxbase/err.h:144:9: note: macro 'E_DEBUG' defined here
  
  #define E_DEBUG(level,x)
  
          ^
  
  acmod.c:1036:5: error: use of undeclared identifier 'E_DEBUG'; did you mean
  
        'ERR_DEBUG'?
  
      E_DEBUG("Frame %d has %d active states\n",
  
      ^~~~~~~
  
      ERR_DEBUG
  
  /usr/local/include/sphinxbase/err.h:149:5: note: 'ERR_DEBUG' declared here
  
      ERR_DEBUG,
  
      ^
  
  acmod.c:1036:5: warning: expression result unused [-Wunused-value]
  
      E_DEBUG("Frame %d has %d active states\n",
  
      ^~~~~~~
  
  acmod.c:1161:17: error: too many arguments provided to function-like macro
  
        invocation
  
                  acmod->n_senone_active);
  
                  ^
  
  /usr/local/include/sphinxbase/err.h:144:9: note: macro 'E_DEBUG' defined here
  
  #define E_DEBUG(level,x)
  
          ^
  
  acmod.c:1160:9: error: use of undeclared identifier 'E_DEBUG'; did you mean
  
        'ERR_DEBUG'?
  
          E_DEBUG("Frame %d has %d active states\n", frame_idx,
  
          ^~~~~~~
  
          ERR_DEBUG
  
  /usr/local/include/sphinxbase/err.h:149:5: note: 'ERR_DEBUG' declared here
  
      ERR_DEBUG,
  
      ^
  
  acmod.c:1160:9: warning: expression result unused [-Wunused-value]
  
          E_DEBUG("Frame %d has %d active states\n", frame_idx,
  
          ^~~~~~~
  
  acmod.c:1303:37: error: too many arguments provided to function-like macro
  
        invocation
  
              acmod->n_senone_active, acmod->output_frame);
  
                                      ^
  
  /usr/local/include/sphinxbase/err.h:144:9: note: macro 'E_DEBUG' defined here
  
  #define E_DEBUG(level,x)
  
          ^
  
  acmod.c:1302:5: error: use of undeclared identifier 'E_DEBUG'; did you mean
  
        'ERR_DEBUG'?
  
      E_DEBUG("acmod_flags2list: %d active in frame %d\n",
  
      ^~~~~~~
  
      ERR_DEBUG
  
  /usr/local/include/sphinxbase/err.h:149:5: note: 'ERR_DEBUG' declared here
  
      ERR_DEBUG,
  
      ^
  
  acmod.c:1302:5: warning: expression result unused [-Wunused-value]
  
      E_DEBUG("acmod_flags2list: %d active in frame %d\n",
  
      ^~~~~~~
  
  3 warnings and 6 errors generated.
  
  make[2]: *** [acmod.lo] Error 1
  
  make[1]: *** [all-recursive] Error 1
  
  make: *** [all-recursive] Error 1