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• Rtsp streaming with 3gp (Video encoded with ffmpeg) breaking every 8 seconds

  8 août 2012, par user1581063

  I have set up Darwin streaming server(6.0) to stream rtsp on android / other mobile devices in AWS using Ec2.
  I have opened all UDP and necessary tcp ports required for playing RTSP

  I am using ffmpeg to encode videos. Below is the command used for encoding a H264 video to H263.

  ffmpeg -i test1.mp4 -f 3gp -s 176x144 -vcodec h263 -b:v 339k -r 14.895 -acodec libamr_nb -ac 1 -ar 8000 -ab 12.2k -y test.3gp

  The encoded videos stops every multiples of 8 seconds, bufffers and plays again in all Android phone(< 4.0).

  I tried all the options still the behavior is same. The same RTSP link plays well with Daroon player( downloaded from google play) on Android or VLC player in windows.

  I am not able to figure whether its a encoding issue or server side issue.

  Link for the mobile : m.try.vasop.com/rtsp.php

  Link for the RTSP : rtsp ://175.41.130.157/1343973357914_h263.3gp

• Iphone Streaming and playing Audio Problem

  20 août 2011, par KayKay

  I am trying to make an app that plays audio stream using ffmpeg, libmms.
  I can open mms server, get stream, and decode audio frame to raw frame using suitable codec.
  However I don't know how to do next.
  I think I must use AudioToolbox/AudioToolbox.h and make audioqueue.
  but however when I give audioqueuebuffer decode buffer's memory and play, Only plays the white noise.
  Here is my code.

  What am i missing ?
  Any comment and hint is very appreciated.
  Thanks very much.

  while(av_read_frame(pFormatCtx, &pkt)>=0)
  
  {
  
      int pkt_decoded_len = 0;
  
      int frame_decoded_len;
  
      int decode_buff_remain=AVCODEC_MAX_AUDIO_FRAME_SIZE * 5;
  
      if(pkt.stream_index==audiostream)
  
      {
  
          frame_decoded_len=decode_buff_remain;
  
          int16_t *decode_buff_ptr = decode_buffer;
  
          int decoded_tot_len=0;
  
          pkt_decoded_len = avcodec_decode_audio2(pCodecCtx, decode_buff_ptr, &frame_decoded_len,
  
                                                  pkt.data, pkt.size);
  
          if (pkt_decoded_len <0) break;
  
          AudioQueueAllocateBuffer(audioQueue, kBufferSize, &buffers[i]);
  
          AQOutputCallback(self, audioQueue, buffers[i], pkt_decoded_len);
  
  
  
          if(i == 1){
  
              AudioQueueSetParameter(audioQueue, kAudioQueueParam_Volume, 1.0);
  
              AudioQueueStart(audioQueue, NULL);
  
          }
  
          i++;
  
      }
  
  }
  
  
  
  
  
  void AQOutputCallback(void *inData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer, int copySize)
  
  {
  
      mmsDemoViewController *staticApp = (mmsDemoViewController *)inData;
  
      [staticApp handleBufferCompleteForQueue:inAQ buffer:inBuffer size:copySize];
  
  }
  
  
  
  - (void)handleBufferCompleteForQueue:(AudioQueueRef)inAQ
  
                            buffer:(AudioQueueBufferRef)inBuffer
  
                              size:(int)copySize
  
  {
  
      inBuffer->mAudioDataByteSize = inBuffer->mAudioDataBytesCapacity;
  
      memcpy((char*)inBuffer->mAudioData, (const char*)decode_buffer, copySize);
  
  
  
      AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL);
  
  }

• What are the video streaming specifics : video coded parameters, web server configuration, video player ?

  20 septembre 2011, par albanx

  With my server I encode videos from any format to mp4 with ffmpeg, for making play them with flowplayer on the web site. The problem is that videos buffering is not working. Video plays once it has been fully buffered (downloaded).

  • Should mp4 videos be encoded in any particular way for having
    streaming work ?
  • Or maybe the IIS7 server need extra configuration ?
  • I am using php for getting video files : getMedia ?file=asd.mp4

  I have IIS7 web server with php. Any suggestions ?