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• Vitamio build librtmp for android

  15 avril 2014, par David

  I read in the GitHub of this project FFmpeg-vitamio comes with rtmp compilled but seems Not.

  Here in the next link to the ffmpeg build, as you can see exists an .sh for android with librtmp

  https://github.com/yixia/FFmpeg-Vitamio

  When I try to execute it I get a syntax error from windows and ubuntu.

  And I don´t have idea about what Must I do once compiled (If it´s possible) where to place the libs, etc, Can someone help me please ? I can´t find information about that.

  Greetens

  DAvid

• FFmpegFrameGrabber crashes 100% of time attempting to compress video on Android

  2 avril 2013, par esilver

  I am attempting to use javacv/ffmpeg to compress video on an Android device prior to upload. I am using this code :

  FrameGrabber grabber = new FFmpegFrameGrabber(inputFile.getAbsolutePath()); 
  
  grabber.start();
  
  FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFile.getAbsolutePath(), 
  
     grabber.getImageWidth(), grabber.getImageHeight(), 
  
     grabber.getAudioChannels()); 
  
  
  
  recorder.setVideoCodec(com.googlecode.javacv.cpp.avcodec.AV_CODEC_ID_MPEG4);
  
  recorder.setAudioCodec(com.googlecode.javacv.cpp.avcodec.AV_CODEC_ID_PCM_S16LE);
  
  recorder.setPixelFormat(com.googlecode.javacv.cpp.avutil.AV_PIX_FMT_YUV420P);
  
  
  
  /* Unclear if I need these lines or not */
  
  // recorder.setFrameRate(grabber.getFrameRate()); 
  
  // recorder.setSampleRate(grabber.getSampleRate()); 
  
  // recorder.setFormat("mp4");
  
  /* End unclear lines */
  
  
  
  recorder.start();
  
  
  
  Frame frame; 
  
  int totalFrames = grabber.getLengthInFrames();
  
  for (int i = 0; i < totalFrames; i++) {
  
    frame = grabber.grabFrame();
  
    if (frame == null) break;
  
    recorder.record(frame);
  
  }
  
  
  
  recorder.stop();
  
  grabber.stop();

  This code crashes 100% of the time at FFmpegFrameGrabber line 584, which is the line :

  frame.samples = samples_buf.position(0).limit(data_size / av_get_bytes_per_sample(samples_frame.format()));

  This is because samples_buf is null, because samples_frame.format() does not appear to match any of the cases (AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL).

  I attempted to avoid this crash by using the grab() method instead of the grabFrame() method, because the grab() method skips audio processing. However, the video I end up with does not play back when I extract it off the device and attempt playback in a web browser, for example.

  I have tried numerous iterations of this code, including this code, all to no avail, all crashing because of line above.

  Can anyone advise the shortest working path to compressing a video using javacv/ffmpeg on Android ?

  Thanks !

• av_read_frame function in ffmpeg in android always returning packet.stream_index as 0

  31 juillet 2013, par droidmad

  I am using the following standard code pasted below (ref : http://dranger.com/ffmpeg/) to use ffmpeg in android using ndk. My code is working fine in ubuntu 10.04 using gcc compiler. But I am facing an issue in android.The issue is av_read_frame(pFormatCtx, &packet) is always returning packet.stream_index=0. I have tested my code with various rtsp urls and I have the same behaviour in all cases. I do not have any linking or compiling issues as everything seems to be working fine except this issue. I am trying to solve this from last 2 days but I am stuck badly.Please point me in right direction.

  #include 
  
  #include <android></android>log.h>
  
  
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  
  
  #include 
  
  #define DEBUG_TAG "mydebug_ndk"
  
  
  
  jint Java_com_example_tut2_MainActivity_myfunc(JNIEnv * env, jobject this,jstring myjurl) {
  
    AVFormatContext *pFormatCtx = NULL;
  
    int             i, videoStream;
  
    AVCodecContext  *pCodecCtx = NULL;
  
    AVCodec         *pCodec = NULL;
  
    AVFrame         *pFrame = NULL;
  
    AVPacket        packet;
  
    int             frameFinished;
  
  
  
    AVDictionary    *optionsDict = NULL;
  
    struct SwsContext *sws_ctx = NULL;
  
  
  
    jboolean isCopy;
  
    const char * mycurl = (*env)->GetStringUTFChars(env, myjurl, &amp;isCopy);
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:p2: [%s]", mycurl);
  
  
  
    // Register all formats and codecs
  
    av_register_all();
  
    avformat_network_init();
  
    // Open video file
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:before_open");
  
  
  
    if(avformat_open_input(&amp;pFormatCtx, mycurl, NULL, NULL)!=0)
  
        return -1;
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "start: %d\t%d\n",pFormatCtx->raw_packet_buffer_remaining_size,pFormatCtx->max_index_size);
  
  
  
    (*env)->ReleaseStringUTFChars(env, myjurl, mycurl);
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:before_stream");
  
    // Retrieve stream information
  
    if(avformat_find_stream_info(pFormatCtx, NULL)&lt;0)
  
        return -1;
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_stream");
  
    // Find the first video stream
  
    videoStream=-1;
  
    for(i=0; inb_streams; i++)
  
        if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
  
          videoStream=i;
  
          break;
  
        }
  
    if(videoStream==-1)
  
        return -1; // Didn&#39;t find a video stream
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_videostream");
  
    // Get a pointer to the codec context for the video stream
  
    pCodecCtx=pFormatCtx->streams[videoStream]->codec;
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_codec_context");
  
  
  
    // Find the decoder for the video stream
  
    pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_decoder");
  
  
  
    if(pCodec==NULL)
  
        return -1;
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:found_decoder");
  
  
  
    // Open codec
  
    if(avcodec_open2(pCodecCtx, pCodec, &amp;optionsDict)&lt;0)
  
        return -1;
  
    // Allocate video frame
  
    pFrame=avcodec_alloc_frame();
  
    sws_ctx = sws_getContext(pCodecCtx->width,pCodecCtx->height,pCodecCtx->pix_fmt,pCodecCtx->width,
  
          pCodecCtx->height,PIX_FMT_YUV420P,SWS_BILINEAR,NULL,NULL,NULL);
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:before_while");
  
  
  
    int count=0;
  
    while(av_read_frame(pFormatCtx, &amp;packet)>=0) {
  
          __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "entered while: %d   %d   %d\n", packet.duration,packet.stream_index,packet.size);
  
  
  
        if(packet.stream_index==videoStream) {
  
            // Decode video frame
  
            //break;
  
            avcodec_decode_video2(pCodecCtx, pFrame, &amp;frameFinished,&amp;packet);
  
            __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:in_while");
  
            if(frameFinished) {
  
                __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:gng_out_of_while");
  
                  break;
  
            }
  
        }
  
  
  
        // Free the packet that was allocated by av_read_frame
  
        av_free_packet(&amp;packet);
  
        if(++count>1000)
  
           return -2; //infinite while loop
  
    }
  
    __android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK:after_while");
  
  
  
    // Free the YUV frame
  
    av_free(pFrame);
  
    // Close the codec
  
    avcodec_close(pCodecCtx);
  
    // Close the video file
  
    avformat_close_input(&amp;pFormatCtx);
  
  
  
    return 0;
  
  
  
  }