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• how to play mp3 using ffmpeg

  5 novembre 2013, par Ari

  I'm trying to play audio mp3 file using ffmpeg in android
  but I'm facing a problem in the below mentioned code

  how to play mp3 using ffmpeg

   void JNICALL  Java_com_music_MainActivity_loadFile(JNIEnv* env, jobject obj,jstring file,jbyteArray array)
  
  {
  
      jboolean            isfilenameCopy;
  
      const char *        filename = (*env)->GetStringUTFChars(env, file, &isfilenameCopy);
  
      AVCodec *codec;
  
      AVCodecContext *c= NULL;
  
      int out_size, len;
  
      FILE *f, *outfile;
  
      uint8_t *outbuf;
  
      uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
  
      AVPacket avpkt;
  
      jclass              cls = (*env)->GetObjectClass(env, obj);
  
      jmethodID           play = (*env)->GetMethodID(env, cls, "playSound", "([BI)V");//At the begining of your main function
  
  
  
      av_init_packet(&avpkt);
  
  
  
      printf("Audio decoding\n");
  
  
  
  
  
      __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "inside load file");
  
      /* find the mpeg audio decoder */
  
      codec = avcodec_find_decoder(CODEC_ID_MP3);
  
      if (!codec) {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
  
  
      c= avcodec_alloc_context();
  
  
  
      /* open it */
  
      if (avcodec_open(c, codec) < 0) {
  
          fprintf(stderr, "could not open codec\n");
  
          exit(1);
  
      }
  
  
  
      __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "open avcode");
  
      outbuf = malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);
  
     __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "open %s",outbuf);
  
  
  
      f = fopen(filename, "rb");
  
      if (!f) {
  
          fprintf(stderr, "could not open %s\n", filename);
  
          exit(1);
  
      }
  
  
  
      /* decode until eof */
  
      avpkt.data = inbuf;
  
      avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
  
      __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "data =%s and size %d",avpkt.data,avpkt.size);
  
      while (avpkt.size > 0) {
  
          out_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
  
          len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);
  
          __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "length =%d",len);
  
          if (len < 0) {
  
              fprintf(stderr, "Error while decoding\n");
  
              __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, " failed length =%d",errno);
  
  
  
              exit(1);
  
          }
  
          if (out_size > 0) {
  
              /* if a frame has been decoded, output it */
  
              jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
  
              memcpy(bytes, outbuf, out_size); //
  
              (*env)->ReleaseByteArrayElements(env, array, bytes, 0);
  
              (*env)->CallVoidMethod(env, obj, play, array, out_size);
  
  
  
          }
  
          avpkt.size -= len;
  
          avpkt.data += len;
  
          if (avpkt.size < AUDIO_REFILL_THRESH) {
  
              /* Refill the input buffer, to avoid trying to decode
  
               * incomplete frames. Instead of this, one could also use
  
               * a parser, or use a proper container format through
  
               * libavformat. */
  
              memmove(inbuf, avpkt.data, avpkt.size);
  
              avpkt.data = inbuf;
  
              len = fread(avpkt.data + avpkt.size, 1,
  
                          AUDIO_INBUF_SIZE - avpkt.size, f);
  
              if (len > 0)
  
                  avpkt.size += len;
  
          }
  
      }
  
  
  
      fclose(f);
  
      free(outbuf);
  
  
  
      avcodec_close(c);
  
      av_free(c);
  
  }

  i am getting the len = - 1 in

  len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);

  what am i doing wrong ??

  please help

• Continuously play the gif on image using FFmpeg

  20 février 2020, par Shweta Patil

  I am trying to place multiple gif on image and save as gif using FFmpeg. I had achieved placing of multiple gif but all gif doesnot play continuously i.e Second gif repeat only once first gif finish and started again ..the second gif stop and start again only when first gif finishes.

  command_try[0]="-i";
  
      command_try[1]=input;
  
      command_try[2]="-i";
  
      command_try[3]=gifthumbnail;
  
      command_try[4]="-i";
  
      command_try[5]=gifthumbnail;
  
      command_try[6]="-i";
  
      command_try[7]=thumbnail;
  
      command_try[8]="-i";
  
      command_try[9]=thumbnail2;
  
      command_try[10]="-filter_complex";
  
      command_try[11]="[0:v]scale=0:0[base];[1:v]scale=300:-1[img1];[2:v]scale=720:-1290[img2];[3:v]scale=80:-1[img3];[4:v]scale=50:-1[img4];[img1]rotate=45:c=black@0:ow=rotw(45):oh=roth(45)[r1];[img2]rotate=0:c=black@0:ow=rotw(0):oh=roth(0)[r2];" +
  
              "[img3]rotate=0:c=black@0:ow=rotw(0):oh=roth(0)[r3];[img4]rotate=0:c=black@0:ow=rotw(0):oh=roth(0)[r4];[base][r1]overlay=100:70[tmp1];"+
  
              "[tmp1][r2]overlay=55:55[tmp2];[tmp2][r3]overlay=65:65[tmp3];[tmp3][r4]overlay=30:30";
  
  
  
      command_try[12]="-preset";
  
      command_try[13]="veryfast";
  
      command_try[14]="/storage/emulated/0/Pictures/imggif.gif";

  As I am recently started working on FFmpeg need help to play gif continuously independently.

• Play drm protected video

  10 mars 2023, par Aaditya Kumar

  I downloaded video from this link :-

  


  https://zee5vod.akamaized.net/drm1/elemental/dash/TV_SHOWS/ZEE_TV/March2021/15032021/Seamless/BQC_Kumkum_Bhagya_CS_Ep1787_Seamless_15032021_hi_a2808b31106f106303f084b9943d5986/manifest1080lowp/1080lowp_000000649.mp4

  


  


  but when i am playing video then the video is not supported

  


  


  someone help that how can i able to play this video