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• Android AudioRecord to FFMPEG encode native AAC

  8 mars 2013, par Curtis Kiu

  I am doing video chatting in android and i would like to port ffmpeg to stream rtsp or rtmp but now i have a try in RTSP first.
  Somehow the problem now is av_write_frame or av_interleaved_write_frame is fail to work or just crash.
  Maybe...
  AudioRecord Sample format is not equals to FFMPEG setting
  Frame receive is not equals

  So code... AudioRecorder
  http://pastebin.com/iWtB3Jhy
  package com.curtis.broadcaster.Publisher ;

  import android.app.Activity;
  
  import android.graphics.Bitmap;
  
  import android.media.AudioFormat;
  
  import android.media.AudioRecord;
  
  import android.media.AudioRecord.OnRecordPositionUpdateListener;
  
  import android.media.MediaRecorder;
  
  import android.os.Bundle;
  
  import android.util.Log;
  
  
  
  public class Publisher extends Activity {
  
      private int mAudioBufferSize;
  
      private int mAudioBufferSampleSize;
  
      private AudioRecord mAudioRecord;
  
      private boolean inRecordMode = false;
  
      private short[] audioBuffer;
  
      private String Tag = "Publisher/Publisher.java";
  
  
  
      public void onCreate(Bundle savedInstanceState) {
  
          Log.i(Tag, "|| onCreate()");
  
          super.onCreate(savedInstanceState);
  
          initAudioRecord();
  
          Log.i(Tag, "-- End onCreate()");
  
      }
  
  
  
      @Override
  
      public void onResume() {
  
          Log.i(Tag, "|| onResume()");
  
          super.onResume();
  
          inRecordMode = true;
  
          Thread t = new Thread(new Runnable() {
  
  
  
              public void run() {
  
                  Log.i(Tag, "|| Run Threat t");
  
                  getSamples();
  
                  Log.i(Tag, "-- End Threat t");
  
              }
  
          });
  
          t.start();
  
          Log.i(Tag, "-- End onResume()");
  
      }
  
  
  
      protected void onPause() {
  
          Log.i(Tag, "|| Run onPause()");
  
          inRecordMode = false;
  
          super.onPause();
  
          Log.i(Tag, "-- End onPause()");
  
      }
  
  
  
      @Override
  
      protected void onDestroy() {
  
          Log.i(Tag, "|| Run onDestroy()");
  
          if (mAudioRecord != null) {
  
              mAudioRecord.release();
  
              Log.i(Tag + " onDestroy", "mAudioRecord.release()");
  
          }
  
          jniStopAll();
  
          super.onDestroy();
  
          android.os.Process.killProcess(android.os.Process.myPid());
  
          Log.i(Tag, "-- End onDestroy()");
  
      }
  
  
  
      public OnRecordPositionUpdateListener mListener = new OnRecordPositionUpdateListener() {
  
  
  
          public void onPeriodicNotification(AudioRecord recorder) {
  
              Log.i(Tag + " mListener(onPeriodicNotification)", "time is "
  
                      + System.currentTimeMillis());
  
              jniSetAudioSample(audioBuffer);
  
          //  audioBuffer = new short[mAudioBufferSampleSize];
  
          }
  
  
  
          public void onMarkerReached(AudioRecord recorder) {
  
              Log.i(Tag + " mListener(onMarkerReached)",
  
                      "time is " + System.currentTimeMillis());
  
              inRecordMode = false;
  
              recorder.stop();
  
              Log.i(Tag, "recorder.stop()");
  
          }
  
      };
  
  
  
      private void initAudioRecord() {
  
          try {
  
              jniCheck();
  
              int sampleRate = 44100;
  
              int channelConfig = AudioFormat.CHANNEL_IN_MONO;
  
              int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
  
              mAudioBufferSize = 2 * AudioRecord.getMinBufferSize(sampleRate,
  
                      channelConfig, audioFormat);
  
              mAudioBufferSampleSize = mAudioBufferSize / 2;
  
              Log.i(Tag, "Buffer Size " + mAudioBufferSize);
  
              Log.i(Tag, "new AudioRecord begin");
  
  
  
              mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
  
                      sampleRate, channelConfig, audioFormat, mAudioBufferSize);
  
              Log.i(Tag, "new AudioRecord end");
  
  
  
              jniInitFFMpeg();
  
          } catch (IllegalArgumentException e) {
  
              Log.i(Tag, "initAudioRecord go Errors");
  
              e.printStackTrace();
  
          }
  
  
  
          // mAudioRecord.setNotificationMarkerPosition(10000);
  
          mAudioRecord.setPositionNotificationPeriod(1024);
  
          mAudioRecord.setRecordPositionUpdateListener(mListener);
  
  
  
          int audioRecordState = mAudioRecord.getState();
  
          if (audioRecordState != AudioRecord.STATE_INITIALIZED) {
  
              finish();
  
          }
  
  
  
      }
  
  
  
      private void getSamples() {
  
          Log.i(Tag, "|| getSamples()");
  
          if (mAudioRecord == null)
  
              return;
  
  
  
          audioBuffer = new short[mAudioBufferSampleSize];
  
          mAudioRecord.startRecording();
  
          int audioRecordingState = mAudioRecord.getRecordingState();
  
          if (audioRecordingState != AudioRecord.RECORDSTATE_RECORDING) {
  
              finish();
  
          }
  
          while (inRecordMode) {
  
              int samplesRead = mAudioRecord.read(audioBuffer, 0,
  
                      mAudioBufferSampleSize);
  
              Log.i(Tag, "getSamples >>SamplesRead : " + samplesRead);
  
          }
  
          mAudioRecord.stop();
  
          Log.i(Tag, "mAudioRecord.stop()");
  
      }
  
  
  
      private native void jniCheck();
  
  
  
      private native void jniInitFFMpeg();
  
  
  
      private native void jniSetAudioSample(short[] audioBuffer);
  
  
  
      private native void jniStopAll();
  
  
  
      static {
  
          System.loadLibrary("ffmpeg");
  
          System.loadLibrary("testerv4");
  
  
  
      }
  
  
  
  }

  FFMPEG JNI http://pastebin.com/hgPva35b

  #include 
  
  #include <android></android>log.h>
  
  #include <android></android>bitmap.h>
  
  
  
  #include 
  
  #include 
  
  #include 
  
  #include 
  
  #include <sys></sys>time.h>
  
  #include "libavformat/rtsp.h"
  
  
  
  #include <libavutil></libavutil>mathematics.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  
  
  #undef exit
  
  /* Log System */
  
  #define  LOG_TAG    "FFMPEGSample - v4a"
  
  #define DEBUG_TAG   "FFMPEG-AUDIO PART"
  
  #define  LOGI(...)  __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
  
  #define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
  
  
  
  /* 5 seconds stream duration */
  
  #define STREAM_DURATION   5.0
  
  #define STREAM_FRAME_RATE 25 /* 25 images/s */
  
  #define STREAM_NB_FRAMES  ((int)(STREAM_DURATION * STREAM_FRAME_RATE))
  
  #define STREAM_PIX_FMT      PIX_FMT_YUV420P /* default pix_fmt */
  
  #define VIDEO_CODEC_ID      CODEC_ID_FLV1
  
  #define AUDIO_CODEC_ID      CODEC_ID_AAC
  
  
  
  static int sws_flags = SWS_BICUBIC;
  
  int mode = 1; //1 = only audio, 2 = only video, 3 = both video and audio
  
  
  
  AVFormatContext *avForCtx;
  
  //AVFormatContext *oc;
  
  AVStream *audio_st, *video_st;
  
  double audio_pts, video_pts;
  
  int frameCount, audioFrameCount, start;
  
  char *url;
  
  
  
  /*Audio Declare*/
  
  float t, tincr, tincr2;
  
  int16_t *samples;
  
  uint8_t *audio_outbuf;
  
  int audio_outbuf_size;
  
  int audio_input_frame_size;
  
  
  
  AVFormatContext *createAVFormatContext();
  
  AVStream *add_audio_stream(AVFormatContext *oc, enum CodecID codec_id);
  
  void open_video(AVFormatContext *oc, AVStream *st);
  
  void open_audio(AVFormatContext *oc, AVStream *st);
  
  AVStream *add_video_stream(AVFormatContext *oc, enum CodecID codec_id);
  
  void write_audio_frame(AVFormatContext *oc, AVStream *st);
  
  void write_video_frame(AVFormatContext *oc, AVStream *st);
  
  void init();
  
  void setAudioSample(unsigned char *inSample[]);
  
  void stopAll();
  
  
  
  /*/////////////////////////////////JNI Bridge////////////////////////////////////// */
  
  void Java_com_curtis_broadcaster_Publisher_Publisher_jniCheck(JNIEnv* env,
  
          jobject this) {
  
      LOGI("-@ JNI work fine @-");
  
  }
  
  void Java_com_curtis_broadcaster_Publisher_Publisher_jniInitFFMpeg(JNIEnv* env,
  
          jobject this) {
  
      LOGI("-@ Init Encorder @-");
  
  
  
      /* initialize libavcodec, and register all codecs and formats */
  
      avcodec_init();
  
      avcodec_register_all();
  
      av_register_all();
  
      avformat_network_init(); //ERROR
  
  
  
  
  
      /* allocate the output media context */
  
      avForCtx = createAVFormatContext();
  
      frameCount = 1;
  
      audioFrameCount = 1;
  
      start = 0;
  
  
  
      /* add the audio and video streams using the default format codecs
  
       and initialize the codecs */
  
      video_st = NULL;
  
      audio_st = NULL;
  
      if (mode == 1 || mode == 3) {
  
          audio_st = add_audio_stream(avForCtx, AUDIO_CODEC_ID);
  
          LOGI("(Init Encorder) - addAudioStream");
  
      }
  
      if (mode == 2 || mode == 3) {
  
          video_st = add_video_stream(avForCtx, VIDEO_CODEC_ID);
  
          LOGI("(Init Encorder) - addVideoStream");
  
  
  
      }
  
  
  
      //  av_dump_format(avForCtx, 0, "rtsp://192.168.1.104/live/live", 1);
  
      LOGI("(Init Encorder) - Waiting to call open_*");
  
  
  
      if (audio_st) {
  
          open_audio(avForCtx, audio_st);
  
          LOGI("(Init Encorder) - open_audio");
  
      }
  
  
  
      if (video_st) {
  
          open_video(avForCtx, video_st);
  
          LOGI("(Init Encorder) - open_video");
  
      }
  
  
  
      av_write_header(avForCtx);
  
      LOGI("-@ Finish Init Encorder @-");
  
  
  
  }
  
  
  
  void Java_com_curtis_broadcaster_Publisher_Publisher_jniSetAudioSample(
  
          JNIEnv* env, jobject this, unsigned char *inSample[]) {
  
      if (audio_st) {
  
          LOGI("-@ Start setAudioSample @-");
  
          samples = (int16_t *) inSample;
  
  
  
          write_audio_frame(avForCtx, audio_st);
  
          LOGI("-@ Finish setAudioSample @-");
  
      }
  
  }
  
  
  
  void Java_com_curtis_broadcaster_Publisher_Publisher_jniStopAll(JNIEnv* env,
  
          jobject this) {
  
      LOGI("-@ Stopping All @-");
  
      //close_audio(avForCtx, audio_st);
  
      //close_video(avForCtx, video_st);
  
      LOGI("-@ Stopped All @-");
  
  }
  
  /*/////////////////////////////END JNI Bridge////////////////////////////////////// */
  
  
  
  /* New Added Coding */
  
  AVFormatContext *createAVFormatContext() {
  
      LOGI("-@OPEN - createAVFormatContext@-");
  
  
  
      AVFormatContext *ctx = avformat_alloc_context();
  
      //  ctx->oformat = av_guess_format("flv", "rtmp://192.168.1.104/live/live",
  
      //      NULL);
  
      //  ctx->oformat = av_guess_format("flv", NULL, NULL);
  
  
  
      //if (!av_guess_format("flv", NULL, NULL)) {
  
  
  
      //LOGI("-flv Can not Guess Format-");
  
      //}
  
  
  
      ctx->oformat = av_guess_format("rtsp", NULL, NULL);
  
  
  
      if (!av_guess_format("rtsp", NULL, NULL)) {
  
  
  
          LOGI("-flv Can not Guess Format-");
  
      }
  
  
  
      /*
  
       LOGI("%d",avformat_alloc_output_context2(&amp;ctx, ctx->oformat, "flv",
  
       "rtmp://192.168.1.104/live/live"));
  
       if (!ctx) {
  
       LOGI("-@avformat_alloc_output_context2 fail@-");
  
       }*/
  
      //   LOGI("flv %d",avformat_alloc_output_context2(&amp;ctx, ctx->oformat, "flv",
  
      //   "rtmp://192.168.1.104/live/live"));
  
      //   LOGI("rtmp %d",avformat_alloc_output_context2(&amp;ctx, ctx->oformat, "rtmp",
  
      //   "rtmp://192.168.1.104/live/live"));
  
      //   LOGI("mpeg4 %d",avformat_alloc_output_context2(&amp;ctx, ctx->oformat, "mpeg4",
  
      //   "rtmp://192.168.1.104/live/live"));
  
      //   LOGI("NULL %d",avformat_alloc_output_context2(&amp;ctx, ctx->oformat, NULL,
  
      //   "rtmp://192.168.1.104/live/live"));
  
      avformat_alloc_output_context2(&amp;ctx, ctx->oformat, "sdp",
  
              "rtsp://192.168.1.104:1935/live/live");
  
  
  
      if (!ctx) {
  
          LOGI("-@avformat_alloc_output_context2 fail@-");
  
      }
  
  
  
      LOGI("-@CLOSE - createAVFormatContext@-");
  
  
  
      return ctx;
  
  }
  
  
  
  /**************************************************************/
  
  /* audio output */
  
  
  
  /*
  
   * add an audio output stream
  
   */
  
  AVStream *add_audio_stream(AVFormatContext *oc, enum CodecID codec_id) {
  
      LOGI("-@OPEN - add_audio_stream@-");
  
  
  
      AVCodecContext *c;
  
      AVStream *st = avformat_new_stream(oc, avcodec_find_encoder(codec_id));
  
  
  
      if (!st) {
  
          LOGI("-@add_audio_stream - Could not alloc stream@-");
  
          exit(1);
  
      }
  
      st->id = 1;
  
  
  
      c = st->codec;
  
      c->codec_id = AUDIO_CODEC_ID;
  
      c->codec_type = AVMEDIA_TYPE_AUDIO;
  
  
  
      /* put sample parameters */
  
      c->sample_fmt = AV_SAMPLE_FMT_FLT;
  
      //c->sample_fmt = AV_SAMPLE_FMT_S16;
  
      c->bit_rate = 100000;
  
      c->sample_rate = 44100;
  
      c->channels = 1;
  
  
  
      // some formats want stream headers to be separate
  
      if (oc->oformat->flags &amp; AVFMT_GLOBALHEADER)
  
          c->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
      LOGI("-@Close - add_audio_stream@-");
  
  
  
      return st;
  
  }
  
  
  
  void open_audio(AVFormatContext *oc, AVStream *st) {
  
      LOGI("@- open_audio -@");
  
  
  
      AVCodecContext *c;
  
      AVCodec *codec;
  
  
  
      c = st->codec;
  
      c->strict_std_compliance = -2;
  
      /* find the audio encoder */
  
      codec = avcodec_find_encoder(c->codec_id);
  
      if (!codec) {
  
          LOGI("@- open_audio E:codec not found-@");
  
          exit(1);
  
      }
  
  
  
      /* open it */
  
      if (avcodec_open(c, codec) &lt; 0) {
  
          LOGI("%d",avcodec_open(c, codec));
  
          LOGI("@- open_audio E:could not open codec-@");
  
          exit(1);
  
      }
  
  
  
      /* init signal generator */
  
      t = 0;
  
      tincr = 2 * M_PI * 110.0 / c->sample_rate;
  
      /* increment frequency by 110 Hz per second */
  
      tincr2 = 2 * M_PI * 110.0 / c->sample_rate / c->sample_rate;
  
  
  
      audio_outbuf_size = 10000;
  
      audio_outbuf = av_malloc(audio_outbuf_size);
  
  
  
      /* ugly hack for PCM codecs (will be removed ASAP with new PCM
  
       support to compute the input frame size in samples */
  
      if (c->frame_size &lt;= 1) {
  
          audio_input_frame_size = audio_outbuf_size / c->channels;
  
          switch (st->codec->codec_id) {
  
          case CODEC_ID_PCM_S16LE:
  
          case CODEC_ID_PCM_S16BE:
  
          case CODEC_ID_PCM_U16LE:
  
          case CODEC_ID_PCM_U16BE:
  
              audio_input_frame_size >>= 1;
  
              break;
  
          default:
  
              break;
  
          }
  
      } else {
  
          audio_input_frame_size = c->frame_size;
  
      }
  
      LOGI("audio_input_frame_size : %d",audio_input_frame_size);
  
      samples = av_malloc(audio_input_frame_size * 2 * c->channels);
  
      LOGI("@- Close open_audio -@");
  
  
  
  }
  
  
  
  /* prepare a 16 bit dummy audio frame of &#39;frame_size&#39; samples and
  
   &#39;nb_channels&#39; channels */
  
  void get_audio_frame(int16_t *samples, int frame_size, int nb_channels) {
  
      LOGI("@- get_audio_frame -@");
  
  
  
      int j, i, v;
  
      int16_t *q;
  
  
  
      q = samples;
  
      for (j = 0; j &lt; frame_size; j++) {
  
          v = (int) (sin(t) * 10000);
  
          for (i = 0; i &lt; nb_channels; i++)
  
              *q++ = v;
  
          t += tincr;
  
          tincr += tincr2;
  
          LOGI("@- audio_frame Looping -@");
  
      }
  
      LOGI("@- CLOSE get_audio_frame -@");
  
  
  
  }
  
  
  
  void write_audio_frame(AVFormatContext *oc, AVStream *st) {
  
      LOGI("@- write_audio_frame -@");
  
  
  
      AVCodecContext *c;
  
      AVPacket pkt;
  
      av_init_packet(&amp;pkt);
  
  
  
      c = st->codec;
  
  
  
      //get_audio_frame(samples, audio_input_frame_size, c->channels);
  
      LOGI("@- write_audio_frame : got frame from get_audio_frame -@");
  
  
  
      pkt.size
  
              = avcodec_encode_audio(c, audio_outbuf, audio_outbuf_size, samples);
  
      LOGI("%d",pkt.size);
  
  
  
      if (c->coded_frame &amp;&amp; c->coded_frame->pts != AV_NOPTS_VALUE)
  
          pkt.pts
  
                  = av_rescale_q(c->coded_frame->pts, c->time_base, st->time_base);
  
      LOGI("%d",pkt.pts);
  
  
  
      pkt.flags |= AV_PKT_FLAG_KEY;
  
      pkt.stream_index = st->index;
  
      pkt.data = audio_outbuf;
  
      LOGI("Finish PKT");
  
  
  
      /* write the compressed frame in the media file */
  
      //  if (av_interleaved_write_frame(oc, &amp;pkt) != 0) {
  
      //  LOGI("@- write_audio_frame E:Error while writing audio frame -@");
  
      //  exit(1);
  
      //  }
  
  
  
      if (av_interleaved_write_frame(oc, &amp;pkt) != 0) {
  
          LOGI("Error while writing audio frame %d\n", audioFrameCount);
  
      } else {
  
          LOGI("Writing Audio Frame %d", audioFrameCount);
  
      }
  
  
  
      LOGI("@- CLOSE write_audio_frame -@");
  
      audioFrameCount++;
  
      av_free_packet(&amp;pkt);
  
  }
  
  
  
  void close_audio(AVFormatContext *oc, AVStream *st) {
  
      avcodec_close(st->codec);
  
  
  
      av_free(samples);
  
      av_free(audio_outbuf);
  
  }
  
  
  
  /**************************************************************/
  
  /* video output */
  
  
  
  AVFrame *picture, *tmp_picture;
  
  uint8_t *video_outbuf;
  
  int frame_count, video_outbuf_size;
  
  
  
  /* add a video output stream */
  
  AVStream *add_video_stream(AVFormatContext *oc, enum CodecID codec_id) {
  
      AVCodecContext *c;
  
      AVStream *st;
  
      AVCodec *codec;
  
  
  
      st = avformat_new_stream(oc, NULL);
  
      if (!st) {
  
          fprintf(stderr, "Could not alloc stream\n");
  
          exit(1);
  
      }
  
  
  
      c = st->codec;
  
  
  
      /* find the video encoder */
  
      codec = avcodec_find_encoder(codec_id);
  
      if (!codec) {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
      avcodec_get_context_defaults3(c, codec);
  
  
  
      c->codec_id = codec_id;
  
  
  
      /* put sample parameters */
  
      c->bit_rate = 400000;
  
      /* resolution must be a multiple of two */
  
      c->width = 352;
  
      c->height = 288;
  
      /* time base: this is the fundamental unit of time (in seconds) in terms
  
       of which frame timestamps are represented. for fixed-fps content,
  
       timebase should be 1/framerate and timestamp increments should be
  
       identically 1. */
  
      c->time_base.den = STREAM_FRAME_RATE;
  
      c->time_base.num = 1;
  
      c->gop_size = 12; /* emit one intra frame every twelve frames at most */
  
      c->pix_fmt = STREAM_PIX_FMT;
  
      if (c->codec_id == CODEC_ID_MPEG2VIDEO) {
  
          /* just for testing, we also add B frames */
  
          c->max_b_frames = 2;
  
      }
  
      if (c->codec_id == CODEC_ID_MPEG1VIDEO) {
  
          /* Needed to avoid using macroblocks in which some coeffs overflow.
  
           This does not happen with normal video, it just happens here as
  
           the motion of the chroma plane does not match the luma plane. */
  
          c->mb_decision = 2;
  
      }
  
      // some formats want stream headers to be separate
  
      if (oc->oformat->flags &amp; AVFMT_GLOBALHEADER)
  
          c->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  
  
      return st;
  
  }
  
  
  
  AVFrame *alloc_picture(enum PixelFormat pix_fmt, int width, int height) {
  
      AVFrame * picture;
  
      uint8_t *picture_buf;
  
      int size;
  
  
  
      picture = avcodec_alloc_frame();
  
      if (!picture)
  
          return NULL;
  
      size = avpicture_get_size(pix_fmt, width, height);
  
      picture_buf = av_malloc(size);
  
      if (!picture_buf) {
  
          av_free(picture);
  
          return NULL;
  
      }
  
      avpicture_fill((AVPicture *) picture, picture_buf, pix_fmt, width, height);
  
      return picture;
  
  }
  
  
  
  void open_video(AVFormatContext *oc, AVStream *st) {
  
      AVCodec *codec;
  
      AVCodecContext *c;
  
  
  
      c = st->codec;
  
  
  
      /* find the video encoder */
  
      codec = avcodec_find_encoder(c->codec_id);
  
      if (!codec) {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
  
  
      /* open the codec */
  
      if (avcodec_open(c, codec) &lt; 0) {
  
          fprintf(stderr, "could not open codec\n");
  
          exit(1);
  
      }
  
  
  
      video_outbuf = NULL;
  
      if (!(oc->oformat->flags &amp; AVFMT_RAWPICTURE)) {
  
          /* allocate output buffer */
  
          /* XXX: API change will be done */
  
          /* buffers passed into lav* can be allocated any way you prefer,
  
           as long as they&#39;re aligned enough for the architecture, and
  
           they&#39;re freed appropriately (such as using av_free for buffers
  
           allocated with av_malloc) */
  
          video_outbuf_size = 200000;
  
          video_outbuf = av_malloc(video_outbuf_size);
  
      }
  
  
  
      /* allocate the encoded raw picture */
  
      picture = alloc_picture(c->pix_fmt, c->width, c->height);
  
      if (!picture) {
  
          fprintf(stderr, "Could not allocate picture\n");
  
          exit(1);
  
      }
  
  
  
      /* if the output format is not YUV420P, then a temporary YUV420P
  
       picture is needed too. It is then converted to the required
  
       output format */
  
      tmp_picture = NULL;
  
      if (c->pix_fmt != PIX_FMT_YUV420P) {
  
          tmp_picture = alloc_picture(PIX_FMT_YUV420P, c->width, c->height);
  
          if (!tmp_picture) {
  
              fprintf(stderr, "Could not allocate temporary picture\n");
  
              exit(1);
  
          }
  
      }
  
  }
  
  
  
  /* prepare a dummy image */
  
  void fill_yuv_image(AVFrame *pict, int frame_index, int width, int height) {
  
      int x, y, i;
  
  
  
      i = frame_index;
  
  
  
      /* Y */
  
      for (y = 0; y &lt; height; y++) {
  
          for (x = 0; x &lt; width; x++) {
  
              pict->data[0][y * pict->linesize[0] + x] = x + y + i * 3;
  
          }
  
      }
  
  
  
      /* Cb and Cr */
  
      for (y = 0; y &lt; height / 2; y++) {
  
          for (x = 0; x &lt; width / 2; x++) {
  
              pict->data[1][y * pict->linesize[1] + x] = 128 + y + i * 2;
  
              pict->data[2][y * pict->linesize[2] + x] = 64 + x + i * 5;
  
          }
  
      }
  
  }
  
  
  
  void write_video_frame(AVFormatContext *oc, AVStream *st) {
  
      int out_size, ret;
  
      AVCodecContext *c;
  
      struct SwsContext *img_convert_ctx;
  
  
  
      c = st->codec;
  
  
  
      if (frame_count >= STREAM_NB_FRAMES) {
  
          /* no more frame to compress. The codec has a latency of a few
  
           frames if using B frames, so we get the last frames by
  
           passing the same picture again */
  
      } else {
  
          if (c->pix_fmt != PIX_FMT_YUV420P) {
  
              /* as we only generate a YUV420P picture, we must convert it
  
               to the codec pixel format if needed */
  
              if (img_convert_ctx == NULL) {
  
                  img_convert_ctx = sws_getContext(c->width, c->height,
  
                          PIX_FMT_YUV420P, c->width, c->height, c->pix_fmt,
  
                          sws_flags, NULL, NULL, NULL);
  
                  if (img_convert_ctx == NULL) {
  
                      fprintf(stderr,
  
                              "Cannot initialize the conversion context\n");
  
                      exit(1);
  
                  }
  
              }
  
              fill_yuv_image(tmp_picture, frame_count, c->width, c->height);
  
              sws_scale(img_convert_ctx, tmp_picture->data,
  
                      tmp_picture->linesize, 0, c->height, picture->data,
  
                      picture->linesize);
  
          } else {
  
              fill_yuv_image(picture, frame_count, c->width, c->height);
  
          }
  
      }
  
  
  
      if (oc->oformat->flags &amp; AVFMT_RAWPICTURE) {
  
          /* raw video case. The API will change slightly in the near
  
           future for that. */
  
          AVPacket pkt;
  
          av_init_packet(&amp;pkt);
  
  
  
          pkt.flags |= AV_PKT_FLAG_KEY;
  
          pkt.stream_index = st->index;
  
          pkt.data = (uint8_t *) picture;
  
          pkt.size = sizeof(AVPicture);
  
  
  
          ret = av_interleaved_write_frame(oc, &amp;pkt);
  
      } else {
  
          /* encode the image */
  
          out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size,
  
                  picture);
  
          /* if zero size, it means the image was buffered */
  
          if (out_size > 0) {
  
              AVPacket pkt;
  
              av_init_packet(&amp;pkt);
  
  
  
              if (c->coded_frame->pts != AV_NOPTS_VALUE)
  
                  pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base,
  
                          st->time_base);
  
              if (c->coded_frame->key_frame)
  
                  pkt.flags |= AV_PKT_FLAG_KEY;
  
              pkt.stream_index = st->index;
  
              pkt.data = video_outbuf;
  
              pkt.size = out_size;
  
  
  
              /* write the compressed frame in the media file */
  
              ret = av_interleaved_write_frame(oc, &amp;pkt);
  
          } else {
  
              ret = 0;
  
          }
  
      }
  
      if (ret != 0) {
  
          fprintf(stderr, "Error while writing video frame\n");
  
          exit(1);
  
      }
  
      frame_count++;
  
  }
  
  
  
  void close_video(AVFormatContext *oc, AVStream *st) {
  
      avcodec_close(st->codec);
  
      av_free(picture->data[0]);
  
      av_free(picture);
  
      if (tmp_picture) {
  
          av_free(tmp_picture->data[0]);
  
          av_free(tmp_picture);
  
      }
  
      av_free(video_outbuf);
  
  }

  Android Manifest has been set and init everything.
  Please give me some ideas..
  Some log message to yours http://pastebin.com/uPD5LyH2

• How to convert wav file to mp4 using ffmpeg in android ?

  30 mars 2012, par newentry

  I am having a wav file.How to convert wav file into mp4 file container format with AAC as audio stream using FFmpeg in android.I know how compile and port ffmpeg for android.Can anybody give me right direction

  thanks,

• Samples RSS And Flashback Samples

  22 décembre 2011, par Multimedia Mike — Game Hacking, Python

  I made good on my claim that I would create an RSS feed for the samples repository.

  Here is the link to the samples RSS feed [ http://samples.mplayerhq.hu/samples-rss.xml ]. Also, here is the Python source code I threw together for the task.

  I just want to check : I’m not the only person who still relies on RSS these days, right ? The tech press has been cheerfully proclaiming its demise for some time now. But then, they have been proclaiming the same for Adobe Flash as well.

  I’m no expert in RSS. If you have any suggestions for how to improve the features presented in the feed, please let me know. And, of course, keep the samples coming. This script should help provide more visibility for a broader audience.

  Mario and Flashback Samples
  Thanks to LuigiBlood who sent in some samples that allowed me to test out my new script for automatically syncing the repositories and updating the samples RSS feed. First, there are CPC multimedia files from the Japanese 3DO port of Flashback : The Quest for Identity. Then, there is an Interplay MVE file on the CD version of Mario Teaches Typing in which the video doesn’t decode correctly.

  LuigiBlood also sent in another file from the latter game. It’s big and has the extension .AV. It could be a multimedia file as it appears to have a palette and PCM audio inside. But there’s no header and I’m a bit unsure about how to catalog it.