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• Evolution #4271 (Nouveau) : valider_url_distante => pouvoir déclarer des domaines distants et pas ...

  21 janvier 2019, par - Equipement

  Bonjour,

  La fonction valider_url_distante permet de déclarer des hosts distants :
  

  <span class="CodeRay"><span class="local-variable">$known_hosts</span> = pipeline(<span class="string"><span class="delimiter">'</span><span class="content">declarer_hosts_distants</span><span class="delimiter">'</span></span>, <span class="local-variable">$known_hosts</span>);
  </span>
  Télécharger

  C’est très bien, mais avec plusieurs centaines de hosts à déclarer (dont la liste varie dans le temps), cela devient compliqué à gérer.

  Serait-il possible d’avoir, en plus, la possibilité de déclarer des domaines distants ?

  Une première piste serait de pouvoir déclarer .example.com dans le pipeline pour inclure tous les *.example.com au lieu des les énumérer un par un.

  Une seconde piste consisterait à s’inspirer de la function need_proxy (via une constante avec la même syntaxe que pour le http_noproxy) :

  // Pour mémoire code actuel à conserver ...
  

  <span class="CodeRay">    <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">false</span>;
      <span class="keyword">foreach</span> (<span class="local-variable">$known_hosts</span> <span class="keyword">as</span> <span class="local-variable">$known_host</span>) {
          <span class="local-variable">$parse_known</span> = <span class="predefined">parse_url</span>(<span class="local-variable">$known_host</span>);
          <span class="keyword">if</span> (<span class="local-variable">$parse_known</span>
            <span class="keyword">and</span> <span class="predefined">strtolower</span>(<span class="local-variable">$parse_known</span>[<span class="string"><span class="delimiter">'</span><span class="content">host</span><span class="delimiter">'</span></span>]) === <span class="predefined">strtolower</span>(<span class="local-variable">$parsed_url</span>[<span class="string"><span class="delimiter">'</span><span class="content">host</span><span class="delimiter">'</span></span>])) {
              <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">true</span>;
              <span class="keyword">break</span>;
          }
      }
  </span>
  Télécharger

  // ... que l’on pourrait faire suivre de ce code (complètement inspiré de function need_proxy) :
  

  <span class="CodeRay">    <span class="keyword">if</span> (!<span class="local-variable">$is_known_host</span>) {
                  <span class="local-variable">$known_domaines</span> = _DECLARER_DOMAINES_DISTANTS;
   
                  <span class="local-variable">$known_domaines</span> = <span class="predefined">str_replace</span>(<span class="string"><span class="delimiter">"</span><span class="char">\n</span><span class="delimiter">"</span></span>, <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="delimiter">"</span></span>, <span class="local-variable">$known_domaines</span>);
                  <span class="local-variable">$known_domaines</span> = <span class="predefined">str_replace</span>(<span class="string"><span class="delimiter">"</span><span class="char">\r</span><span class="delimiter">"</span></span>, <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="delimiter">"</span></span>, <span class="local-variable">$known_domaines</span>);
                  <span class="local-variable">$known_domaines</span> = <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="local-variable">$known_domaines</span><span class="content"> </span><span class="delimiter">"</span></span>;
                  <span class="local-variable">$domain</span> = <span class="predefined">strtolower</span>(<span class="local-variable">$parsed_url</span>[<span class="string"><span class="delimiter">'</span><span class="content">host</span><span class="delimiter">'</span></span>]);
   
                  <span class="keyword">if</span> (<span class="predefined">strpos</span>(<span class="local-variable">$known_domaines</span>, <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="local-variable">$domain</span><span class="content"> </span><span class="delimiter">"</span></span>) !== <span class="predefined-constant">false</span>){
                      <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">true</span>;
                  }
   
                  <span class="keyword">while</span> (<span class="predefined">strpos</span>(<span class="local-variable">$domain</span>, <span class="string"><span class="delimiter">'</span><span class="content">.</span><span class="delimiter">'</span></span>) !== <span class="predefined-constant">false</span>) {
                          <span class="local-variable">$domain</span> = <span class="predefined">explode</span>(<span class="string"><span class="delimiter">'</span><span class="content">.</span><span class="delimiter">'</span></span>, <span class="local-variable">$domain</span>);
                          <span class="predefined">array_shift</span>(<span class="local-variable">$domain</span>);
                          <span class="local-variable">$domain</span> = <span class="predefined">implode</span>(<span class="string"><span class="delimiter">'</span><span class="content">.</span><span class="delimiter">'</span></span>, <span class="local-variable">$domain</span>);
   
                          <span class="keyword">if</span> (<span class="predefined">strpos</span>(<span class="local-variable">$known_domaines</span>, <span class="string"><span class="delimiter">"</span><span class="content"> .</span><span class="local-variable">$domain</span><span class="content"> </span><span class="delimiter">"</span></span>) !== <span class="predefined-constant">false</span>) {
                              <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">true</span>;
                          }
                  }
          } 
  </span>
  Télécharger

  Cordialement
  Equipement

• Why does my yuva444p video always lose alpha channel after transcoding to vp9 ?

  1er avril, par Ian Ye

  I'm trying to convert a video with alpha channel using FFmpeg, but the transparency information gets lost in the output.

  


  Here is the input video (prores, yuva444p) detail with ffprobe :

  


   Stream #0:1[0x2](und): Video: prores (4444) (ap4h / 0x68347061), yuva444p12le(bt709), 360x480, 73314 kb/s, 60.13 fps, 60 tbr, 600 tbn (default)
      Metadata:
        creation_time   : 2019-05-21T21:23:03.000000Z
        handler_name    : Core Media Video
        vendor_id       : appl
        encoder         : Apple ProRes 4444


  


  And my command is below :

  


  ffmpeg -i alpha_prores.mov -c:v libvpx-vp9 -pix_fmt yuva420p -auto-alt-ref 0 out.webm


  


  There is the output info :

  


  Output #0, webm, to 'out.webm':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    com.apple.quicktime.creationdate: 2019-05-14T13:47:17-0700
    com.apple.quicktime.location.ISO6709: +37.3367-122.0094/
    com.apple.quicktime.make: Apple
    com.apple.quicktime.model: iPhone X
    com.apple.quicktime.software: 12.1.2
    encoder         : Lavf61.7.100
  Stream #0:0(und): Video: vp9, yuva420p(tv, bt709, progressive), 360x480, q=2-31, 60 fps, 1k tbn (default)
      Metadata:
        creation_time   : 2019-05-21T21:23:03.000000Z
        handler_name    : Core Media Video
        vendor_id       : appl
        encoder         : Lavc61.19.101 libvpx-vp9
      Side data:
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A


  


  We can see pix_fmt is still yuva420p, but after finished, I use ffprobe to check it, and the result changed !

  


    Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv, bt709, progressive), 360x480, SAR 1:1 DAR 3:4, 60 fps, 60 tbr, 1k tbn (default)
      Metadata:
        alpha_mode      : 1
        HANDLER_NAME    : Core Media Video
        VENDOR_ID       : appl
        ENCODER         : Lavc61.19.101 libvpx-vp9
        DURATION        : 00:00:05.950000000


  


  The pix_fmt turn to yuv420p, which means lose alpha channel. Also we can see there is an extra info in metadata alpha_mode: 1.

  


  By the way, the result webm video can display its transparent pixel correctly in browser.

  


  When I try to overlay it on a mp4 video, transparent pixels turn to black pixels :

  


  ffmpeg -i background.mp4 -i out.webm -filter_complex "[0][1]overlay=x=10:y=10" output2.mp4


  


  And when I overlay the prores video on the same mp4, result is correct.

  


  ffmpeg -i background.mp4 -i alpha_prores.mov -filter_complex "[0][1]overlay=x=10:y=10" output2.mp4


  


  So I wonder the difference between yuva and alpha_mode:1.

  


  And the reason why vp9 would lose alpha channel when overlay on a mp4 video.

  


  It's better if you can provide other pixel format for my purpose(I want it can display correctly when overlay on mp4) !

  


  Thanks !

  


• Unable to integrate ffmpeg as a native dependency for an Android NDK project

  24 avril 2016, par mmark

  I have an Android NDK project which consists entirely of C/C++ code, and it basically processes images without using any external libraries.

  I’m using Android Studio + Gradle NDK Experimental plugin (0.7.0-alpha1).

  Now, I need to integrate ffmpeg as a native library to use it from the C/C++ code in order to decode a H.264 video frame.

  These are the questions I’ve found here regarding this issue :

  Android - Integrating ffmpeg and android-ndk-r9c

  Android NDK w/ ffmpeg library - error running project

  Using FFmpeg native libraries with Android-NDK

  Can not build with prebuilt static libraries using gradle-experimental

  Here is my build.gradle file :

  apply plugin: 'com.android.model.application'
  
  
  
  def ffmpeg_path = file(project(':ffmpeg').projectDir).absolutePath + "/ffmpeg-android"
  
  
  
  model {
  
  
  
      repositories {
  
          libs(PrebuiltLibraries) {
  
              libavcodec {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libavcodec.a")
  
                  }
  
              }
  
              libavutil {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libavutil.a")
  
                  }
  
              }
  
              libswresample {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libswresample.a")
  
                  }
  
              }
  
              libswscale {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libswscale.a")
  
                  }
  
              }
  
              libavformat {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libavformat.a")
  
                  }
  
              }
  
              libavdevice {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libavdevice.a")
  
                  }
  
              }
  
              libavfilter {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libavfilter.a")
  
                  }
  
              }
  
              libpostproc {
  
                  headers.srcDir "${ffmpeg_path}/include"
  
                  binaries.withType(StaticLibraryBinary) {
  
                      staticLibraryFile = file("${ffmpeg_path}/${targetPlatform.getName()}/lib/libpostproc.a")
  
                  }
  
              }
  
          }
  
      }
  
  
  
      android {
  
          compileSdkVersion = 23
  
          buildToolsVersion = "23.0.2"
  
  
  
          defaultConfig.with {
  
              applicationId = "com.example.hellojni"
  
              minSdkVersion.apiLevel = 4
  
              targetSdkVersion.apiLevel = 23
  
          }
  
      }
  
  
  
      /*
  
       * native build settings
  
       */
  
      android.ndk {
  
          moduleName = "hello-jni"
  
          platformVersion = 9 //same as minSdkVersion.apiLevel for better compatibility
  
          stl    = "c++_static"
  
          abiFilters.addAll(["armeabi", "armeabi-v7a", "x86"]) //filtering ABIs on the ones Google Play Games library is compatible with.
  
      }
  
      android.buildTypes {
  
          release {
  
              minifyEnabled = false
  
              proguardFiles.add(file('proguard-rules.txt'))
  
          }
  
      }
  
  
  
      android.sources {
  
          main {
  
              jni {
  
                  dependencies {
  
                      library "libavcodec" linkage "static"
  
                      library "libavutil" linkage "static"
  
                      library "libswresample" linkage "static"
  
                      library "libswscale" linkage "static"
  
                      library "libavformat" linkage "static"
  
                      library "libavdevice" linkage "static"
  
                      library "libavfilter" linkage "static"
  
                      library "libpostproc" linkage "static"
  
                  }
  
              }
  
          }
  
      }
  
  
  
  }

  I based on this sample from Google which integrates an external native library.

  This is the ffmpeg project I compiled before importing it into mine :
  https://github.com/WritingMinds/ffmpeg-android

  I’ve added all the .a and .h files and I’m able to import the headers in my C/C++ code, but when I try to compile it I get the following error :

  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function try_decode_frame: error: undefined reference to 'avpriv_h264_has_num_reorder_frames'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function compute_pkt_fields: error: undefined reference to 'avpriv_h264_has_num_reorder_frames'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function parse_packet: error: undefined reference to 'av_parser_parse2'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function parse_packet: error: undefined reference to 'av_parser_close'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function read_frame_internal: error: undefined reference to 'av_parser_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function avformat_find_stream_info: error: undefined reference to 'av_parser_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function avformat_find_stream_info: error: undefined reference to 'avcodec_pix_fmt_to_codec_tag'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function avformat_find_stream_info: error: undefined reference to 'avpriv_get_raw_pix_fmt_tags'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function ff_stream_add_bitstream_filter: error: undefined reference to 'av_bitstream_filter_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function ff_stream_add_bitstream_filter: error: undefined reference to 'av_bitstream_filter_close'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(utils.o):utils.c:function av_apply_bitstream_filters: error: undefined reference to 'av_bitstream_filter_filter'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(aadec.o):aadec.c:function aa_read_packet: error: undefined reference to 'av_tea_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(aadec.o):aadec.c:function aa_read_packet: error: undefined reference to 'av_tea_crypt'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(aadec.o):aadec.c:function aa_read_header: error: undefined reference to 'av_tea_alloc'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(aadec.o):aadec.c:function aa_read_header: error: undefined reference to 'av_tea_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(aadec.o):aadec.c:function aa_read_header: error: undefined reference to 'av_tea_crypt'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(ac3dec.o):ac3dec.c:function ac3_eac3_probe.isra.0: error: undefined reference to 'avpriv_ac3_parse_header'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(adtsenc.o):adtsenc.c:function adts_write_header: error: undefined reference to 'avpriv_mpeg4audio_get_config'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(adtsenc.o):adtsenc.c:function adts_write_header: error: undefined reference to 'avpriv_copy_pce_data'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(asfcrypt.o):asfcrypt.c:function ff_asfcrypt_dec: error: undefined reference to 'av_rc4_alloc'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(asfcrypt.o):asfcrypt.c:function ff_asfcrypt_dec: error: undefined reference to 'av_rc4_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(asfcrypt.o):asfcrypt.c:function ff_asfcrypt_dec: error: undefined reference to 'av_rc4_crypt'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(asfcrypt.o):asfcrypt.c:function ff_asfcrypt_dec: error: undefined reference to 'av_rc4_init'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(asfcrypt.o):asfcrypt.c:function ff_asfcrypt_dec: error: undefined reference to 'av_rc4_crypt'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(matroska.o):matroska.c:function ff_mkv_stereo3d_conv: error: undefined reference to 'av_stereo3d_alloc'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(nut.o):nut.c:function ff_nut_add_sp: error: undefined reference to 'av_tree_node_alloc'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(nut.o):nut.c:function ff_nut_add_sp: error: undefined reference to 'av_tree_insert'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(nut.o):nut.c:function ff_nut_free_sp: error: undefined reference to 'av_tree_enumerate'
  
  /Users/marcos/Documents/Android/fdecoder/ffmpeg/ffmpeg-android/armeabi-v7a/lib/libavformat.a(nut.o):nut.c:function ff_nut_free_sp: error: undefined reference to 'av_tree_destroy'
  
  Error:error: ld returned 1 exit status
  
  Error:Execution failed for task ':app:linkHello-jniArmeabi-v7aDebugSharedLibrary'.
  
  > A build operation failed.
  
        Linker failed while linking libhello-jni.so.
  
    See the complete log at: file:///Users/marcos/Documents/Android/fdecoder/app/build/tmp/linkHello-jniArmeabi-v7aDebugSharedLibrary/output.txt
  
  Information:BUILD FAILED
  
  Information:Total time: 14.993 secs
  
  Information:2 errors
  
  Information:0 warnings
  
  Information:See complete output in console

  There’s obviously something I’m not importing properly, but can’t figure exactly what’s missing.