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• How to play videos that only contain P frames (no I frames) on iOS ?

  9 septembre 2016, par Clement Wang

  I am trying to play a raw .264 file on iOS that only contains P frames (no keyframes included), but it fails to play with multiple open source FFmpeg video players such as kxmovie or ijkplayer.

  The error log shows non-existing PPS 0 referenced, however the SPS and PPS information is already embedded in the frames. I am wondering if it is possible to play P-frame only videos with a modified version of FFmpeg or any other open source library/player.

• 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

• play m3u8 video from laravel storage

  21 janvier 2020, par Jennsen

  My question is the same as how to play m3u8 videos from laravel storage but this one did not get answers.

  If I play the video from the public folder it does it without problems.

  but if I want to play it from storage this doesn’t work.

      public function watch(Request $request, Episode $episode)
  
  {
  
  
  
      $video = Storage::disk('videos')->get($episode->video);
  
  
  
      return new Response($video, 200, ['Content-Type' => 'application/x-mpegURL', 'isHls' => true]);
  
  }

  this is the definition of my disk in config/filesystems.php

    'videos' => [
  
          'driver' => 'local',
  
          'root' => storage_path('app/videos'),
  
          'url' => env('APP_URL').'/storage',
  
          'visibility' => 'public',
  
      ],

  this is my conversion code (job)

       */
  
  public function handle()
  
  {
  
      $path = $this->episode->id . '.m3u8';
  
      $lowBitrate  = (new X264 ('aac'))->setKiloBitrate(500)->setVideoCodec('libx264');
  
      $midBitrate  = (new X264 ('aac'))->setKiloBitrate(1000)->setVideoCodec('libx264');
  
      $highBitrate = (new X264 ('aac'))->setKiloBitrate(3000)->setVideoCodec('libx264');
  
  
  
      FFMpeg::fromDisk('tmp')->open($this->episode->video)
  
          ->exportForHLS()
  
          ->dontSortFormats()
  
          ->setSegmentLength(10)
  
          ->toDisk('local')
  
          ->addFormat($lowBitrate, function($media) {
  
              $media->addFilter(function ($filters) {
  
                  $filters->resize(new \FFMpeg\Coordinate\Dimension(640, 480));
  
              });
  
          })
  
          ->addFormat($midBitrate, function($media) {
  
              $media->addFilter(function ($filters) {
  
                  $filters->resize(new \FFMpeg\Coordinate\Dimension(1280, 960));
  
              });
  
          })
  
          ->addFormat($highBitrate, function($media) {
  
              $media->addFilter(function ($filters) {
  
                  $filters->resize(new \FFMpeg\Coordinate\Dimension(1280, 960));
  
              });
  
          })
  
          ->save($path);
  
  
  
      $this->episode->update([
  
          'video' => $path,
  
      ]);
  
  
  
      FFMpeg::cleanupTemporaryFiles();
  
  
  
  }