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• Rawvideo to mp4 container

  21 février 2020, par Expressingx

  How can I stream rawvideo codec to mp4 container ? The error is Could not find tag for codec rawvideo in stream #0, codec not currently supported in container. Url is for example video=Logitech HD Webcam C270 and Format is dshow. Filename is lets say out.mp4

  AVFormatContext* pInputFmtCtx = avformat_alloc_context();
  
  AVInputFormat* inputFormat = av_find_input_format(Format);
  
  
  
  avformat_open_input(&pInputFmtCtx, url, inputFormat, null);
  
  if (avformat_find_stream_info(pInputFmtCtx, null) != -1)
  
     ... find stream index
  
  
  
  AVCodec* videoDecoder = avcodec_find_decoder(pInputFmtCtx->streams[_vidStreamIndex]->codecpar->codec_id);
  
  
  
  AVCodecContext* videcCodecCtx = avcodec_alloc_context3(videoDecoder);
  
  avcodec_parameters_to_context(videcCodecCtx, videoCodecParams);
  
  
  
  avcodec_open2(videcCodecCtx, videoDecoder, null);
  
  
  
  // and the output context
  
  AVFormatContext* pOutputFmtCtx = null;
  
  avformat_alloc_output_context2(&pOutputFmtCtx, null, null, fileName);
  
  
  
  // iterate over streams of input context and when we find it
  
  AVStream* in_stream = pInputFmtCtx->streams[i];
  
  AVCodecParameters* in_codecpar = in_stream->codecpar;
  
  
  
  AVStream* out_stream = avformat_new_stream(pOutputFmtCtx, null);
  
  
  
  // init h264 encoder
  
  AVCodec* videoEncoder = ffmpeg.avcodec_find_encoder(AVCodecID.AV_CODEC_ID_H264);
  
  pVideoEncoderCodecContext = ffmpeg.avcodec_alloc_context3(videoEncoder);
  
  
  
  pVideoEncoderCodecContext->time_base = videcCodecCtx->time_base;
  
  pVideoEncoderCodecContext->framerate = videcCodecCtx->framerate;
  
  pVideoEncoderCodecContext->width = videcCodecCtx->width;
  
  pVideoEncoderCodecContext->height = videcCodecCtx->height;
  
  pVideoEncoderCodecContext->bit_rate = videcCodecCtx->bit_rate;
  
  pVideoEncoderCodecContext->gop_size = videcCodecCtx->gop_size;
  
  pVideoEncoderCodecContext->pix_fmt = AVPixelFormat.AV_PIX_FMT_YUV420P;
  
  pVideoEncoderCodecContext->flags |= ffmpeg.AV_CODEC_FLAG_GLOBAL_HEADER;
  
  
  
  // copy parameters to outstream codec
  
  avcodec_parameters_copy(out_stream->codecpar, in_codecpar);
  
  
  
  ....
  
  
  
  // after that
  
  avio_open(&pOutputFmtCtx->pb, fileName, AVIO_FLAG_WRITE);
  
  avformat_write_header(pOutputFmtCtx, &opts);
  
  
  
  // and reading
  
  while (av_read_frame(pInputFormatContext, pkt) >= 0)
  
  
  
  // decode 
  
  avcodec_send_packet(videcCodecCtx, pkt);
  
  //receive the raw frame from the decoder
  
  avcodec_receive_frame(videcCodecCtx, frame);
  
  
  
  // now encode if its video packet
  
  int ret = avcodec_send_frame(pVideoEncoderCodecContext, frame);
  
  if (ret < 0)
  
  {
  
      continue;
  
  }
  
  
  
  while (ret >= 0)
  
  {
  
      ret = avcodec_receive_packet(pVideoEncoderCodecContext, packet);
  
  
  
      if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
  
      {
  
             return;
  
      }
  
  
  
      av_packet_rescale_ts(packet, pVideoEncoderCodecContext->time_base, pOutputFmtCtx->streams[packet->stream_index]->time_base);
  
      av_interleaved_write_frame(pOutputFmtCtx, pkt);
  
  
  
      av_packet_unref(packet);
  
  }

  This works fine if the camera streams H264, but if the camera streams rawvideo, it doesn’t stream to the file and throws error.

  EDIT As suggested I’m trying to encode it now, but avcodec_send_frame() returns -22 and nothing is saved to the file. Where do I miss ? Code edited.

• parser not found for codec wmav2

  5 décembre 2011, par HashCoder

  I am getting a warning when I run the below command.

  Warning : [asf @ 01C787A0] parser not found for codec wmav2, packets or times may be inval
  id.

  I am using the latest ffmpeg.exe, did I miss any parameters. Any suggestions please.

  ffmpeg -i Assets\Logitech_webcam_on_PC.wmv -sameq -f swf -y -an -s 640x360 MySlide.swf
  
  ffmpeg version N-35295-gb55dd10, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Nov 30 2011 00:52:52 with gcc 4.6.2
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
  
  ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
  
  able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
  
  -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
  
  c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
  
  libxvid --enable-zlib
  
    libavutil    51. 29. 1 / 51. 29. 1
  
    libavcodec   53. 39. 1 / 53. 39. 1
  
    libavformat  53. 22. 0 / 53. 22. 0
  
    libavdevice  53.  4. 0 / 53.  4. 0
  
    libavfilter   2. 50. 0 /  2. 50. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  [asf @ 01C787A0] parser not found for codec wmav2, packets or times may be inval
  
  id.
  
  
  
  Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000
  
  /1) -> 0.08 (1/12)
  
  Input #0, asf, from 'Assets\Logitech_webcam_on_PC.wmv':
  
    Metadata:
  
      WMFSDKVersion   : 11.0.5721.5265
  
      WMFSDKNeeded    : 0.0.0.0000
  
      IsVBR           : 1
  
      VBR Peak        : 50500.0000
  
      Buffer Average  : 66550.0000
  
    Duration: 00:00:36.22, start: 0.000000, bitrate: 497 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 32000 Hz, 1 channels,
  
  s16, 20 kb/s
  
      Stream #0:1(eng): Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 320x180, 422 kb/
  
  s, 0.08 tbr, 1k tbn, 1k tbc
  
  [buffer @ 02AA9760] w:320 h:180 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
  
  [scale @ 02AA9A80] w:320 h:180 fmt:yuv420p -> w:640 h:360 fmt:yuv420p flags:0x4
  
  Output #0, swf, to 'MySlide.swf':
  
    Metadata:
  
      WMFSDKVersion   : 11.0.5721.5265
  
      WMFSDKNeeded    : 0.0.0.0000
  
      IsVBR           : 1
  
      VBR Peak        : 50500.0000
  
      Buffer Average  : 66550.0000
  
      encoder         : Lavf53.22.0
  
      Stream #0:0(eng): Video: flv1, yuv420p, 640x360, q=2-31, 200 kb/s, 90k tbn,
  
  0.08 tbc
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (wmv2 -> flv)
  
  Press [q] to stop, [?] for help
  
  frame=    4 fps=  0 q=0.0 size=      97kB time=00:00:48.00 bitrate=  16.6kbits/s
  
  frame=    5 fps=  0 q=0.0 Lsize=     111kB time=00:01:00.00 bitrate=  15.2kbits/
  
  s dup=0 drop=599
  
  video:111kB audio:0kB global headers:0kB muxing overhead 0.128646%

• Processing 3.0 get Error=2 No such file or directory

  29 octobre 2016, par Tuang Pingfavilunda

  I cannot figure it out what happen to my Processing file. I am trying to use VideoExport library and my Macbook Pro cannot play it, but the Mac-mini is able to do so.

  Before the error happened it is another error=13 permission denied thing, so I messed in the terminal for a while with chmod 777 and finding the file with ls. I don’t know if that may be the reason that caused this happen. FYI, I also installed ffmpeg already.

  And this is the full error :

      java.io.IOException: Cannot run program "/Users/Tuang/Desktop/DMA_WORKS/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde": error=2, No such file or directory
  
      at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
  
      at com.hamoid.VideoExport.startFfmpeg(Unknown Source)
  
      at com.hamoid.VideoExport.initialize(Unknown Source)
  
      at com.hamoid.VideoExport.saveFrame(Unknown Source)
  
      at Basic.draw(Basic.java:32)
  
      at processing.core.PApplet.handleDraw(PApplet.java:2412)
  
      at processing.awt.PSurfaceAWT$12.callDraw(PSurfaceAWT.java:1540)
  
      at processing.core.PSurfaceNone$AnimationThread.run(PSurfaceNone.java:316)
  
  Caused by: java.io.IOException: error=2, No such file or directory
  
      at java.lang.UNIXProcess.forkAndExec(Native Method)
  
      at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
  
      at java.lang.ProcessImpl.start(ProcessImpl.java:134)
  
      at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
  
      ... 7 more
  
  VideoExport error: Ffmpeg failed. Study /Users/Tuang/Desktop/DMA_WORKS/Work1_Facial_Muscles/Camera_Recorder/Basic/basic.mp4.txt for more details.
  
  Could not run the sketch (Target VM failed to initialize).
  
  For more information, read revisions.txt and Help → Troubleshooting.
  
  </init>

  ---

  1) The java.io.IOException : trying to call "/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde" which doesn’t exist for real. It is gone for a long time but seems like the program stuck here.

  2) "basic" is a file name from the Example of the Library. I just use it to test. Surprisingly, Every files that have been saved and changed the name still get the java.io.IOException’s error of the missing sketch_161027a.pde file.

  ---

  What I have done :
  1 I have already done the Homebrew thing to install ffmpeg.
  2 I deleted everything of Processing and reinstall it again.

  Any suggestion ?