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• Error when trying to convert mp3 with image to mp4 using ffmpeg

  25 octobre 2012, par Ello

  The mp3 has an image in it, maybe some album images. When I use ffmpeg to convert it to mp4, it goes wrong. But if I convert an mp3 without an image, it succeeds.

  My command is like this :

  ffmpeg -i input.mp3 output.mp4

  Here's the error :

  Stream mapping:
  
    Stream #0:1 -> #0:0 (mjpeg -> mpeg4)
  
    Stream #0:0 -> #0:1 (mp3 -> aac)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  Here is all the console output :

  ellodeiMac:mine ello$ ffmpeg -frames 0 -i 4.mp3 -y test.mp4
  
  ffmpeg version 0.11.2 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Oct 24 2012 12:21:13 with llvm_gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.9.00)
  
    configuration: --disable-yasm
  
    libavutil      51. 54.100 / 51. 54.100
  
    libavcodec     54. 23.100 / 54. 23.100
  
    libavformat    54.  6.100 / 54.  6.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 77.100 /  2. 77.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
  [mp3 @ 0x7fa12301ae00] max_analyze_duration 5000000 reached at 5015510
  
  Input #0, mp3, from '4.mp3':
  
    Metadata:
  
      artist          : 贵族乐团
  
      album           : 美声天籁
  
      title           : 肖邦离别曲
  
      Tagging time    : 2012-09-18T08:12:10
  
    Duration: 00:04:01.44, start: 0.000000, bitrate: 129 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
  
      Stream #0:1: Video: mjpeg, yuvj420p, 240x240 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        title           : e
  
        comment         : Cover (front)
  
  [buffer @ 0x109115780] w:240 h:240 pixfmt:yuvj420p tb:1/90000 sar:1/1 sws_param:flags=2
  
  [buffersink @ 0x109133720] No opaque field provided
  
  [format @ 0x1091338e0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'format'
  
  [scale @ 0x109133bc0] w:240 h:240 fmt:yuvj420p sar:1/1 -> w:240 h:240 fmt:yuv420p sar:1/1 flags:0x4
  
  [mp4 @ 0x7fa123035c00] Frame rate very high for a muxer not efficiently supporting it.
  
  Please consider specifying a lower framerate, a different muxer or -vsync 2
  
  [aformat @ 0x109136ec0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
  
  [aresample @ 0x1091370c0] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
  
  [mpeg4 @ 0x7fa12303be00] timebase 1/90000 not supported by MPEG 4 standard, the maximum 
  
  admitted value for the timebase denominator is 65535
  
  Output #0, mp4, to 'test.mp4':
  
    Metadata:
  
      artist          : 贵族乐团
  
      album           : 美声天籁
  
      title           : 肖邦离别曲
  
      Tagging time    : 2012-09-18T08:12:10
  
      Stream #0:0: Video: mpeg4, yuv420p, 240x240 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k tbn, 90k tbc
  
      Metadata:
  
        title           : e
  
        comment         : Cover (front)
  
      Stream #0:1: Audio: none, 44100 Hz, stereo, flt, 128 kb/s
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (mjpeg -> mpeg4)
  
    Stream #0:0 -> #0:1 (mp3 -> aac)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

• On memcpy application crashes - FFMPEG, C++

  3 mai 2013, par Spamdark

  I have been working with ffmpeg, I got it working good, but I got a memory leak, I followed some instructions to fix it (like use av_frame_unref), so I needed to update ffmpeg to the version 1.2.
  This is weird for me, because everything was working good, and then, with the update, the application started to crash in a memcpy.

  Honestly, I don't know what's happening, I tried to google it but no answer. I would appreciate your help, here is the segment of the code which is failing :

  int WbMedia::DecodeAudioFrame(int16_t *audio_buf){
  
  static AVFrame *frame;
  
  static AVPacket pkt;
  
  static uint8_t *audio_pkt_data = NULL;
  
  static int audio_pkt_size = 0;
  
  static bool first_time = true;
  
  
  
  if(first_time){
  
      first_time=false;
  
  }
  
  
  
  int len1, data_size = 0;
  
  
  
  for(;;){
  
      bool do_rt = false;
  
  
  
      while(audio_pkt_size > 0){
  
          int obt_frame = 0;
  
  
  
          if (!frame) {
  
              if (!(frame = avcodec_alloc_frame())) {
  
                  MessageBox(0,"Out of memory error","Error: Memory",MB_ICONWARNING | MB_OK);
  
                  return -1;
  
              }
  
          }
  
  
  
          len1 = avcodec_decode_audio4(_audio_ccontext,frame,&obt_frame,&pkt);
  
          if(len1 < 0){
  
              audio_pkt_size = 0;
  
              break;
  
          }
  
  
  
          if(obt_frame){
  
              data_size = av_samples_get_buffer_size(NULL,channel_count,sample_fr,_audio_ccontext->sample_fmt,1);
  
              memcpy(audio_buf,frame->data[0],data_size);
  
          }
  
  
  
          audio_pkt_data+=len1;
  
          audio_pkt_size-=len1;
  
  
  
          if(data_size < 0){
  
              continue;
  
          }
  
  
  
  
  
          return data_size;
  
      }
  
  
  
      if(pkt.data){
  
          //MessageBox(0,"hi","Hi",MB_OK); // This is only for test if the app si reaching this av_free_packet
  
          av_free_packet(&pkt);
  
      }
  
  
  
      if(do_rt){
  
          return data_size;
  
      }
  
  
  
      // Try to get a new packet
  
      if(!audio_packets.empty()){
  
          WaitForSingleObject(Queue_Audio_Mutex,INFINITE);
  
              pkt = *audio_packets.front();
  
              audio_packets.pop();
  
          ReleaseMutex(Queue_Audio_Mutex);
  
  
  
          audio_pkt_size = pkt.size;
  
          audio_pkt_data = pkt.data;
  
      }else{
  
          return -1;
  
      }
  
  }
  
  return 0;
  
  }

  Thanks so much.

• Record Video in Android with a watermark

  1er septembre 2017, par Naval Joshi

  I am creating an application to take a video from the front camera and add a logo and save it.
  I read about FFmpeg and have used it Linux. Is there any simple ways present to do the same.
  I have already coded the application.I am trying to add a Frame to the video while taking/saving.