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• Android java.lang.UnsatisfiedLinkError - couldn't find "libffmpeg.so"

  13 octobre 2016, par Achin

  i have build this project with eclipse https://github.com/youtube/yt-watchme and it is running fine , but when i try to build this project in android studio i am error in my Ffmpeg class ,i have copy all the file from my running demo which i made in eclipse to my android studio project directory , i will post my directory structure and build.gradle , please anyone guide me ? please see the below

  Process: com.google.android.apps.watchme, PID: 6330
  
      java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.google.android.apps.watchme-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]] couldn't find "libffmpeg.so"
  
              at java.lang.Runtime.loadLibrary(Runtime.java:366)
  
              at java.lang.System.loadLibrary(System.java:988)
  
              at com.google.android.apps.watchme.Ffmpeg.<clinit>(Ffmpeg.java:22)
  
              at com.google.android.apps.watchme.VideoStreamingConnection.open(VideoStreamingConnection.java:71)
  
              at com.google.android.apps.watchme.StreamerService.startStreaming(StreamerService.java:73)
  
              at com.google.android.apps.watchme.StreamerActivity.startStreaming(StreamerActivity.java:161)
  
              at com.google.android.apps.watchme.StreamerActivity.access$200(StreamerActivity.java:39)
  
              at com.google.android.apps.watchme.StreamerActivity$1.onServiceConnected(StreamerActivity.java:55)
  
              at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1208)
  
              at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1225)
  
              at android.os.Handler.handleCallback(Handler.java:739)
  
              at android.os.Handler.dispatchMessage(Handler.java:95)
  
              at android.os.Looper.loop(Looper.java:135)
  
              at android.app.ActivityThread.main(ActivityThread.java:5343)
  
              at java.lang.reflect.Method.invoke(Native Method)
  
              at java.lang.reflect.Method.invoke(Method.java:372)
  
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
  
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
  
  </clinit>

  

  and in JNI function

  

• Minimal "hello world" for WebRTC real-time streaming ?

  4 novembre 2018, par d33tah

  I’d like to learn about how to set up HTML5 live streaming. The use case I have in mind is related to controlling a Lego Mindstorms robot, which means that I want minimal latency. So far I experimented with RTMP using this Docker repository, but found that I can’t seem to tune it to get a real-time streaming. After a bit of research, I found that WebRTC could perhaps fit my use case.

  Let’s say I have a ffmpeg-compatible source, such as a webcam or x11grab data that I would like to stream using WebRTC. What would a "hello, world" look like that achieves this goal ?

• ffmpeg convert to webm error "too many invisible frames"

  24 janvier 2019, par Вадим Коломиец

  I need to convert any format (for example, mp4, avi etc) to .webm with own ioContext. I build ffmpeg with vpx, ogg, vorbis, opus and create simple project. But when i write any frame i get error "Too many invisible frames. Failed to send packet to filter vp9_superframe for stream 0"

  I’ve already tried convert from webm to webm with copy codec params with avcodec_parameters_copy and this works.

      #include <qcoreapplication>
  
  #include <qfileinfo>
  
  #include <iostream>
  
  #include <fstream>
  
  
  
  extern "C" {
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libavutil></libavutil>timestamp.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libavfilter></libavfilter>buffersink.h>
  
  #include <libavfilter></libavfilter>buffersrc.h>
  
  #include <libavutil></libavutil>opt.h>
  
  #include <libavutil></libavutil>pixdesc.h>
  
  }
  
  
  
  using namespace std;
  
  
  
  struct BufferData {
  
      QByteArray data;
  
      uint fullsize;
  
  
  
      BufferData() {
  
          fullsize =0;
  
      }
  
  };
  
  
  
  
  
  static int write_packet_to_buffer(void *opaque, uint8_t *buf, int buf_size)         {
  
      BufferData *bufferData = static_cast(opaque);
  
      bufferData->fullsize += buf_size;
  
      bufferData->data.append((const char*)buf, buf_size);
  
      return buf_size;
  
  }
  
  
  
  
  
  static bool writeBuffer(const QString &amp;filename, BufferData *bufferData) {
  
      QFile file(filename);
  
      if( !file.open(QIODevice::WriteOnly) )  return false;
  
      file.write(bufferData->data);
  
      qDebug()&lt;&lt;"FILE SIZE = " &lt;&lt; file.size();
  
      file.close();
  
      return true;
  
  }
  
  
  
  int main(int argc, char *argv[])
  
  {
  
      QCoreApplication a(argc, argv);
  
      AVOutputFormat *ofmt = NULL;
  
      AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;
  
      AVPacket pkt;
  
      int ret;
  
      int stream_index = 0;
  
      int *stream_mapping = NULL;
  
      int stream_mapping_size = 0;
  
  
  
      const char *in_filename  = "../assets/sample.mp4";
  
      const char *out_filename = "../assets/sample_new.webm";
  
  
  
  
  
      //------------------------  Input file  ----------------------------
  
      if ((ret = avformat_open_input(&amp;ifmt_ctx, in_filename, 0, 0)) &lt; 0) {
  
          fprintf(stderr, "Could not open input file '%s'", in_filename);
  
          return 1;
  
      }
  
  
  
      if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) &lt; 0) {
  
          fprintf(stderr, "Failed to retrieve input stream information");
  
          return 1;
  
      }
  
      av_dump_format(ifmt_ctx, 0, in_filename, 0);
  
      //-----------------------------------------------------------------
  
  
  
  
  
      //---------------------- BUFFER -------------------------
  
     AVIOContext *avio_ctx = NULL;
  
     uint8_t *avio_ctx_buffer = NULL;
  
     size_t avio_ctx_buffer_size = 4096*1024;
  
     const size_t bd_buf_size = 1024*1024;
  
     /* fill opaque structure used by the AVIOContext write callback */
  
     avio_ctx_buffer = (uint8_t*)av_malloc(avio_ctx_buffer_size);
  
     if (!avio_ctx_buffer) return AVERROR(ENOMEM);
  
  
  
     BufferData bufferData;
  
     avio_ctx = avio_alloc_context(avio_ctx_buffer, avio_ctx_buffer_size,
  
                                   1, &amp;bufferData, NULL,
  
                                   &amp;write_packet_to_buffer, NULL);
  
  
  
  
  
     if (!avio_ctx) return AVERROR(ENOMEM);
  
     //------------------------------------------------------
  
  
  
  
  
      avformat_alloc_output_context2(&amp;ofmt_ctx, NULL, NULL, out_filename);
  
          if (!ofmt_ctx) {
  
          fprintf(stderr, "Could not create output context\n");
  
          ret = AVERROR_UNKNOWN;
  
          return 1;
  
      }
  
  
  
      //------------------------  Stream list  ----------------------------
  
      stream_mapping_size = ifmt_ctx->nb_streams;
  
      stream_mapping = (int*)av_mallocz_array(stream_mapping_size,     sizeof(*stream_mapping));
  
      if (!stream_mapping) {
  
          ret = AVERROR(ENOMEM);
  
          return 1;
  
      }
  
      //-------------------------------------------------------------------
  
  
  
  
  
  
  
      //------------------------  Output file  ----------------------------
  
      AVCodec *encoder;
  
      AVCodecContext *input_ctx;
  
      AVCodecContext *enc_ctx;
  
      for (int i=0; i &lt; ifmt_ctx->nb_streams; i++) {
  
          AVStream *out_stream;
  
          AVStream *in_stream = ifmt_ctx->streams[i];
  
          AVCodecParameters *in_codecpar = in_stream->codecpar;
  
  
  
          if (in_codecpar->codec_type != AVMEDIA_TYPE_AUDIO &amp;&amp;
  
              in_codecpar->codec_type != AVMEDIA_TYPE_VIDEO &amp;&amp;
  
              in_codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
  
              stream_mapping[i] = -1;
  
              continue;
  
          }
  
  
  
          enc_ctx = avcodec_alloc_context3(encoder);
  
          if (!enc_ctx) {
  
              av_log(NULL, AV_LOG_FATAL, "Failed to allocate the encoder context\n");
  
              return AVERROR(ENOMEM);
  
          }
  
  
  
          stream_mapping[i] = stream_index++;
  
  
  
          out_stream = avformat_new_stream(ofmt_ctx, NULL);
  
          if (!out_stream) {
  
              fprintf(stderr, "Failed allocating output stream\n");
  
              ret = AVERROR_UNKNOWN;
  
              return 1;
  
          }
  
  
  
          out_stream->codecpar->width = in_codecpar->width;
  
          out_stream->codecpar->height = in_codecpar->height;
  
          out_stream->codecpar->level = in_codecpar->level;
  
          out_stream->codecpar->format =in_codecpar->format;
  
          out_stream->codecpar->profile =in_codecpar->profile;
  
          out_stream->codecpar->bit_rate =in_codecpar->bit_rate;
  
          out_stream->codecpar->channels =in_codecpar->channels;
  
          out_stream->codecpar->codec_tag = 0;
  
          out_stream->codecpar->color_trc =in_codecpar->color_trc;
  
          out_stream->codecpar->codec_type =in_codecpar->codec_type;
  
          out_stream->codecpar->frame_size =in_codecpar->frame_size;
  
          out_stream->codecpar->block_align =in_codecpar->block_align;
  
          out_stream->codecpar->color_range =in_codecpar->color_range;
  
          out_stream->codecpar->color_space =in_codecpar->color_space;
  
          out_stream->codecpar->field_order =in_codecpar->field_order;
  
          out_stream->codecpar->sample_rate =in_codecpar->sample_rate;
  
          out_stream->codecpar->video_delay =in_codecpar->video_delay;
  
          out_stream->codecpar->seek_preroll =in_codecpar->seek_preroll;
  
          out_stream->codecpar->channel_layout =in_codecpar->channel_layout;
  
          out_stream->codecpar->chroma_location =in_codecpar->chroma_location;
  
          out_stream->codecpar->color_primaries =in_codecpar->color_primaries;
  
          out_stream->codecpar->initial_padding =in_codecpar->initial_padding;
  
          out_stream->codecpar->trailing_padding =in_codecpar->trailing_padding;
  
          out_stream->codecpar->bits_per_raw_sample = in_codecpar->bits_per_raw_sample;
  
          out_stream->codecpar->sample_aspect_ratio.num = in_codecpar->sample_aspect_ratio.num;
  
          out_stream->codecpar->sample_aspect_ratio.den = in_codecpar->sample_aspect_ratio.den;
  
          out_stream->codecpar->bits_per_coded_sample   = in_codecpar->bits_per_coded_sample;
  
  
  
  
  
          if (in_codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
  
              out_stream->codecpar->codec_id =ofmt_ctx->oformat->video_codec;
  
          }
  
          else if(in_codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
  
              out_stream->codecpar->codec_id = ofmt_ctx->oformat-    >audio_codec;
  
          }
  
      }
  
      av_dump_format(ofmt_ctx, 0, out_filename, 1);
  
      ofmt_ctx->pb = avio_ctx;
  
  
  
      ret = avformat_write_header(ofmt_ctx, NULL);
  
      if (ret &lt; 0) {
  
          fprintf(stderr, "Error occurred when opening output file\n");
  
          return 1;
  
      }
  
      //------------------------------------------------------------------------------
  
  
  
  
  
      while (1) {
  
          AVStream *in_stream, *out_stream;
  
  
  
          ret = av_read_frame(ifmt_ctx, &amp;pkt);
  
          if (ret &lt; 0)
  
              break;
  
  
  
          in_stream  = ifmt_ctx->streams[pkt.stream_index];
  
          if (pkt.stream_index >= stream_mapping_size ||
  
              stream_mapping[pkt.stream_index] &lt; 0) {
  
              av_packet_unref(&amp;pkt);
  
              continue;
  
          }
  
  
  
          pkt.stream_index = stream_mapping[pkt.stream_index];
  
          out_stream = ofmt_ctx->streams[pkt.stream_index];
  
  
  
          /* copy packet */
  
          pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, AVRounding(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
  
          pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, AVRounding(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
  
          pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
  
          pkt.pos = -1;
  
  
  
          ret = av_interleaved_write_frame(ofmt_ctx, &amp;pkt);
  
          if (ret &lt; 0) {
  
              fprintf(stderr, "Error muxing packet\n");
  
              break;
  
          }
  
          av_packet_unref(&amp;pkt);
  
      }
  
      av_write_trailer(ofmt_ctx);
  
      avformat_close_input(&amp;ifmt_ctx);
  
  
  
      /* close output */
  
      writeBuffer(fileNameOut, &amp;bufferData);
  
      avformat_free_context(ofmt_ctx);
  
      av_freep(&amp;stream_mapping);
  
      if (ret &lt; 0 &amp;&amp; ret != AVERROR_EOF) {
  
          fprintf(stderr, "Error occurred: %d\n",ret);
  
          return 1;
  
      }
  
      return a.exec();
  
  }
  
  </fstream></iostream></qfileinfo></qcoreapplication>