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• ffmpeg "Manifest too large" when downloading youtube video

  22 avril 2024, par ynn

  TL ;DR

  


  I'm trying to programmatically download a part of a YouTube video. The widely known procedure doesn't work for some videos and I'd like to overcome this situation.

  


  ---

  


  Context

  


  I'm trying to programmatically download a part of a YouTube video. As described in How to download portion of video with youtube-dl command ?, you can achieve this by the following commands.

  


  #Converts a human-readable URL to longer URLs for internal use.
~ $ youtube-dl --get-url 'https://www.youtube.com/watch?v=POrfo478HRI'
https://r1---sn-3pm76n76.googlevideo.com/videoplayback?expire=1597593009&ei=UQE5X7bXEYqO4QLs17KACQ&ip=10.100.238.99&id=o-AD0HfadoeimIbuf9t8Anru5X9V7cER08YyOz4iKZOCHL&itag=299&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278%2C298%2C299%2C302%2C303&source=youtube&requiressl=yes&mh=NV&mm=31%2C26&mn=sn-3pm76n76%2Csn-oguesnze&ms=au%2Conr&mv=m&mvi=1&pl=17&initcwndbps=908750&vprv=1&mime=video%2Fmp4&gir=yes&clen=9205054989&dur=17931.000&lmt=1597347724488304&mt=1597571322&fvip=1&keepalive=yes&fexp=23883098&c=WEB&txp=7316222&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIgYDqTm0CnLfG0kxsYNrAdtAUYB7alnowiaBArU8R5bBwCIQDeCRDJHFO_PWcnbeFaJvip80deuboN4Pi1x3eRhJBxlQ%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAKTkyTIGVkbWWVx4lqFz77rOdG1FzkM5XuTnYOqtHT4oAiEA9u1R47jPz-mjj4DRXpqqqpUbfaFMW36KbG_pR2jovFM%3D&ratebypass=yes
https://r1---sn-3pm76n76.googlevideo.com/videoplayback?expire=1597593009&ei=UQE5X7bXEYqO4QLs17KACQ&ip=10.100.238.99&id=o-AD0HfadoeimIbuf9t8Anru5X9V7cER08YyOz4iKZOCHL&itag=251&source=youtube&requiressl=yes&mh=NV&mm=31%2C26&mn=sn-3pm76n76%2Csn-oguesnze&ms=au%2Conr&mv=m&mvi=1&pl=17&initcwndbps=908750&vprv=1&mime=audio%2Fwebm&gir=yes&clen=268945126&dur=17931.001&lmt=1597348111385641&mt=1597571322&fvip=1&keepalive=yes&fexp=23883098&c=WEB&txp=7311222&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRgIhAK8XGu3vHucHwqERZ7TQniuvKEd-NTbMkwZbu8EXJ5E3AiEAiS7OYFOcsIrD2xp-AJNzucj1H9ZKMlmkCl_sU7__dZo%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAKTkyTIGVkbWWVx4lqFz77rOdG1FzkM5XuTnYOqtHT4oAiEA9u1R47jPz-mjj4DRXpqqqpUbfaFMW36KbG_pR2jovFM%3D&ratebypass=yes

#Stores the result to a variable.
~ $ url_video_part='https://r1---sn-3pm76n76.googlevideo.com/videoplayback?expire=1597593009&ei=UQE5X7bXEYqO4QLs17KACQ&ip=10.100.238.99&id=o-AD0HfadoeimIbuf9t8Anru5X9V7cER08YyOz4iKZOCHL&itag=299&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278%2C298%2C299%2C302%2C303&source=youtube&requiressl=yes&mh=NV&mm=31%2C26&mn=sn-3pm76n76%2Csn-oguesnze&ms=au%2Conr&mv=m&mvi=1&pl=17&initcwndbps=908750&vprv=1&mime=video%2Fmp4&gir=yes&clen=9205054989&dur=17931.000&lmt=1597347724488304&mt=1597571322&fvip=1&keepalive=yes&fexp=23883098&c=WEB&txp=7316222&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIgYDqTm0CnLfG0kxsYNrAdtAUYB7alnowiaBArU8R5bBwCIQDeCRDJHFO_PWcnbeFaJvip80deuboN4Pi1x3eRhJBxlQ%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAKTkyTIGVkbWWVx4lqFz77rOdG1FzkM5XuTnYOqtHT4oAiEA9u1R47jPz-mjj4DRXpqqqpUbfaFMW36KbG_pR2jovFM%3D&ratebypass=yes'

#Stores the result to a variable.
~ $ url_audio_part='https://r1---sn-3pm76n76.googlevideo.com/videoplayback?expire=1597593009&ei=UQE5X7bXEYqO4QLs17KACQ&ip=10.100.238.99&id=o-AD0HfadoeimIbuf9t8Anru5X9V7cER08YyOz4iKZOCHL&itag=251&source=youtube&requiressl=yes&mh=NV&mm=31%2C26&mn=sn-3pm76n76%2Csn-oguesnze&ms=au%2Conr&mv=m&mvi=1&pl=17&initcwndbps=908750&vprv=1&mime=audio%2Fwebm&gir=yes&clen=268945126&dur=17931.001&lmt=1597348111385641&mt=1597571322&fvip=1&keepalive=yes&fexp=23883098&c=WEB&txp=7311222&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRgIhAK8XGu3vHucHwqERZ7TQniuvKEd-NTbMkwZbu8EXJ5E3AiEAiS7OYFOcsIrD2xp-AJNzucj1H9ZKMlmkCl_sU7__dZo%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAKTkyTIGVkbWWVx4lqFz77rOdG1FzkM5XuTnYOqtHT4oAiEA9u1R47jPz-mjj4DRXpqqqpUbfaFMW36KbG_pR2jovFM%3D&ratebypass=yes'

#Downloads the video for one minute from 12:45.
~ $ ffmpeg    -ss 12:45 -i "${url_video_part}"    -ss 12:45 -i "${url_audio_part}"    -t 1:00 output.mkv
frame= 3600 fps= 49 q=-1.0 Lsize=   27047kB time=00:00:59.99 bitrate=3692.9kbits/s speed=0.813x


  


  This does work perfectly.

  


  ---

  


  Problem

  


  For some videos^†1, the internal URLs are of the form https://manifest.googlevideo.com/... instead of https://RANDOM-STRING.googlevideo.com/... as in the example above.

  


  ~ $ youtube-dl --get-url 'https://www.youtube.com/watch?v=KRMfnvLODZQ'
https://manifest.googlevideo.com/api/manifest/dash/expire/1597593866/ei/qgQ5X5maN8-ilQSu15W4CQ/ip/10.100.238.99/id/KRMfnvLODZQ.1/source/yt_live_broadcast/requiressl/yes/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/force_finished/1/vprv/1/keepalive/yes/fexp/23883098/itag/0/playlist_type/DVR/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Cforce_finished%2Cvprv%2Citag%2Cplaylist_type/sig/AOq0QJ8wRQIhANYKQvKTN8BRmhp7--4tQp9aqRp_qIGjh472BTYLyJ62AiAautFF86xGDHOe7mYlYaZ1W86EM4k2e6UiJS9Q91dMog%3D%3D
https://manifest.googlevideo.com/api/manifest/dash/expire/1597593866/ei/qgQ5X5maN8-ilQSu15W4CQ/ip/10.100.238.99/id/KRMfnvLODZQ.1/source/yt_live_broadcast/requiressl/yes/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/force_finished/1/vprv/1/keepalive/yes/fexp/23883098/itag/0/playlist_type/DVR/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Cforce_finished%2Cvprv%2Citag%2Cplaylist_type/sig/AOq0QJ8wRQIhANYKQvKTN8BRmhp7--4tQp9aqRp_qIGjh472BTYLyJ62AiAautFF86xGDHOe7mYlYaZ1W86EM4k2e6UiJS9Q91dMog%3D%3D


  


  And downloading such videos always fails.

  


  ~ $ ffmpeg    -ss 12:45 -i "${url_video_part}"    -ss 12:45 -i "${url_audio_part}"    -t 1:00 output.mkv
[dash @ 0x55fa6a1a4400] Manifest too large: 3776722
https://manifest.googlevideo.com/...: Invalid data found when processing input


  


  Please note downloading full of such videos using youtube-dl alone succeeds.

  


  _{†1 : As far as we tested, recently (e.g. yesterday) uploaded videos have such URLs and when we retry the same youtube-dl --get-url command after a day or so, we get "innocent" URLs like in the first example.}

  


  ---

  


  Questions

  


  How can I download parts of such videos

  


  


  • by specifying additional options for ffmpeg,

    


  


  • by somehow forcefully retrieving internal URLs of the form https://RANDOM-STRING.googlevideo.com/...,

    


  


  • or by something which I have no idea at all ?

    


  


  


  My current workaround is just to wait for a day or two until the internal URLs change, which is much slower than downloading the full video and then cropping it.

  


  ---

  


  Environments

  


  ~ $ lsb_release -d
Description:    Arch Linux

~ $ ffmpeg -version
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 10.1.0 (GCC)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared --enable-version3
libavutil      56. 51.100 / 56. 51.100
libavcodec     58. 91.100 / 58. 91.100
libavformat    58. 45.100 / 58. 45.100
libavdevice    58. 10.100 / 58. 10.100
libavfilter     7. 85.100 /  7. 85.100
libswscale      5.  7.100 /  5.  7.100
libswresample   3.  7.100 /  3.  7.100
libpostproc    55.  7.100 / 55.  7.100

~ $ youtube-dl --version
2020.07.28


  


• Could NOT find FFmpeg (missing : swresample) (found version "56.1.0")

  28 juin 2016, par sushi

  I try to install obs (Open Broadcaster Software) in my Kali Linux 2.

  I follow this instruction. I have no problem until the obs building :

  cmake -DUNIX_STRUCTURE=1 -DCMAKE_INSTALL_PREFIX=/usr ..

  Where I get this error :

  Could NOT find FFmpeg (missing: swresample) (found version "56.1.0")

  I found this topic but I can’t use this command :

  apt-get -t jessie-backports install libswresample-dev

  Because I am on Kali Linux.

  This is the output of ffmpeg command :

  ffmpeg version N-79093-g7916f04 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.9.2 (Debian 4.9.2-10)
  
    configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      55. 19.100 / 55. 19.100
  
    libavcodec     57. 28.103 / 57. 28.103
  
    libavformat    57. 28.102 / 57. 28.102
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 39.102 /  6. 39.102
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'

• libav error message with H264 codec. "non-strictly-monotonic PTS"

  13 mars 2018, par user1496491

  I have almost zero experience with libav/FFMPEG. I wrote this piece of code which capturing the screen and writes it to the file, and I’m facing some prolems with that. I was working with AV_CODEC_ID_MPEG4 codec at first, it worked just fine, but very quikly application started to spam messages like that

  [dshow @ 02da1c80] real-time buffer [screen-capture-recorder] [video input] too full or near too full (64% of size: 128000000 [rtbufsize parameter])! frame dropped!

  So I googled for some time, and found that probbably encoder is too slow, and I need to change it to faster one. So I changed it to AV_CODEC_ID_H264. Suddenly written file became unreadable, and application started to spam messages

  [libx264 @ 0455ff40] non-strictly-monotonic PTS

  I looked everywhere and all I found was a suggestion to put this two lines

  if(outPacket.pts != AV_NOPTS_VALUE) outPacket.pts = av_rescale_q(outPacket.pts, videoStream->codec->time_base, videoStream->time_base);
  
  if(outPacket.dts != AV_NOPTS_VALUE) outPacket.dts = av_rescale_q(outPacket.dts, videoStream->codec->time_base, videoStream->time_base);

  So I added them, and the result was the same.

  So, what should I do ? How do I configure output correctly ?

  Here’s my code :

  #include "MainWindow.h"
  
  
  
  #include <qguiapplication>
  
  #include <qlabel>
  
  #include <qscreen>
  
  #include <qtimer>
  
  #include <qlayout>
  
  #include <qimage>
  
  #include <qtconcurrent></qtconcurrent>QtConcurrent>
  
  #include <qthreadpool>
  
  #include <qvideoframe>
  
  
  
  #include "ScreenCapture.h"
  
  
  
  MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
  
  {
  
      resize(800, 600);
  
  
  
      label = new QLabel();
  
      label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
  
  
  
      auto layout = new QHBoxLayout();
  
      layout->addWidget(label);
  
  
  
      auto widget = new QWidget();
  
      widget->setLayout(layout);
  
      setCentralWidget(widget);
  
  
  
      connect(this, &amp;MainWindow::imageReady, [=](QImage image) {label->setPixmap(QPixmap::fromImage(image).scaled(label->size(), Qt::KeepAspectRatio));});
  
  
  
      init();
  
      initOutFile();
  
      collectFrames();
  
  }
  
  
  
  MainWindow::~MainWindow()
  
  {
  
      isRunning = false;
  
  
  
      QThreadPool::globalInstance()->waitForDone();
  
  
  
      avformat_close_input(&amp;inputFormatContext);
  
      avformat_free_context(inputFormatContext);
  
  }
  
  
  
  void MainWindow::init()
  
  {
  
      av_register_all();
  
      avcodec_register_all();
  
      avdevice_register_all();
  
  
  
      auto screen = QGuiApplication::screens()[0];
  
      QRect geometry = screen->geometry();
  
  
  
      inputFormatContext = avformat_alloc_context();
  
  
  
  //    AVDictionary* options = NULL;
  
  //    av_dict_set(&amp;options, "framerate", "30", NULL);
  
  //    av_dict_set(&amp;options, "offset_x", QString::number(geometry.x()).toLatin1().data(), NULL);
  
  //    av_dict_set(&amp;options, "offset_y", QString::number(geometry.y()).toLatin1().data(), NULL);
  
  //    av_dict_set(&amp;options, "preset", "ultrafast", NULL);
  
  //    av_dict_set(&amp;options, "probesize", "10MB", NULL);
  
  //    av_dict_set(&amp;options, "pix_fmt", "yuv420p", NULL);
  
  //    av_dict_set(&amp;options, "video_size", QString(QString::number(geometry.width()) + "x" + QString::number(geometry.height())).toLatin1().data(), NULL);
  
  
  
  //    AVInputFormat* inputFormat = av_find_input_format("gdigrab");
  
  //    avformat_open_input(&amp;inputFormatContext, "desktop", inputFormat, &amp;options);
  
  
  
      QSettings settings("HKEY_CURRENT_USER\\Software\\screen-capture-recorder", QSettings::NativeFormat);
  
      settings.setValue("start_x", geometry.x());
  
      settings.setValue("start_y", geometry.y());
  
      settings.setValue("capture_width", geometry.width());
  
      settings.setValue("capture_height", geometry.height());
  
  
  
      AVDictionary* options = NULL;
  
      av_dict_set(&amp;options, "preset", "ultrafast", NULL);
  
      av_dict_set(&amp;options, "vcodec", "h264", NULL);
  
      av_dict_set(&amp;options, "video_size", "1920x1080", NULL);
  
      av_dict_set(&amp;options, "crf", "0", NULL);
  
      av_dict_set(&amp;options, "tune", "zerolatency", NULL);
  
      av_dict_set(&amp;options, "rtbufsize", "128M", NULL);
  
  
  
      AVInputFormat *format = av_find_input_format("dshow");
  
      avformat_open_input(&amp;inputFormatContext, "video=screen-capture-recorder", format, &amp;options);
  
  
  
      av_dict_free(&amp;options);
  
      avformat_find_stream_info(inputFormatContext, NULL);
  
  
  
      videoStreamIndex = av_find_best_stream(inputFormatContext, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
  
  
  
      AVStream* inStream = inputFormatContext->streams[videoStreamIndex];
  
  
  
      inputCodec = avcodec_find_decoder(inStream->codecpar->codec_id);
  
      if(!inputCodec) qDebug() &lt;&lt; "Can't find input codec!";
  
  
  
      inputCodecContext = avcodec_alloc_context3(inputCodec);
  
  
  
      qDebug() &lt;&lt; "IN_FORMAT" &lt;&lt; av_get_pix_fmt_name(inStream->codec->pix_fmt);
  
  
  
      avcodec_parameters_to_context(inputCodecContext, inStream->codecpar);
  
  
  
      if(avcodec_open2(inputCodecContext, inputCodec, NULL)) qDebug() &lt;&lt; "Can't open input codec!";
  
  }
  
  
  
  void MainWindow::initOutFile()
  
  {
  
      const char* filename = "C:/Temp/output.mp4";
  
  
  
      if(avformat_alloc_output_context2(&amp;outFormatContext, NULL, NULL, filename) &lt; 0) qDebug() &lt;&lt; "Can't create out context!";
  
  
  
      outCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
  
      if(!outCodec) qDebug() &lt;&lt; "Can't find codec!";
  
  
  
      videoStream = avformat_new_stream(outFormatContext, outCodec);
  
      videoStream->time_base = {1, 30};
  
  
  
      const AVPixelFormat* pixelFormat = outCodec->pix_fmts;
  
      while (*pixelFormat != AV_PIX_FMT_NONE)
  
      {
  
          qDebug() &lt;&lt; "OUT_FORMAT" &lt;&lt; av_get_pix_fmt_name(*pixelFormat);
  
          ++pixelFormat;
  
      }
  
  
  
      outCodecContext = videoStream->codec;
  
      outCodecContext->bit_rate = 16000000;
  
      outCodecContext->rc_max_rate = 0;
  
      outCodecContext->rc_buffer_size = 0;
  
      outCodecContext->qmin = 10;
  
      outCodecContext->qmax = 51;
  
      outCodecContext->qcompress = 0.6f;
  
      outCodecContext->width = inputCodecContext->width;
  
      outCodecContext->height = inputCodecContext->height;
  
      outCodecContext->time_base = videoStream->time_base;
  
      outCodecContext->gop_size = 10;
  
      outCodecContext->max_b_frames = 1;
  
      outCodecContext->pix_fmt = AV_PIX_FMT_YUV420P;
  
  
  
      if (outFormatContext->oformat->flags &amp; AVFMT_GLOBALHEADER) outCodecContext->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  
  
      if(avcodec_open2(outCodecContext, outCodec, NULL)) qDebug() &lt;&lt; "Can't open out codec!";
  
  
  
      swsContext = sws_getContext(inputCodecContext->width,
  
                                  inputCodecContext->height,
  
                                  inputCodecContext->pix_fmt,
  
                                  outCodecContext->width,
  
                                  outCodecContext->height,
  
                                  outCodecContext->pix_fmt,
  
                                  SWS_BICUBIC, NULL, NULL, NULL);
  
  
  
      if(avio_open(&amp;outFormatContext->pb, filename, AVIO_FLAG_WRITE) &lt; 0) qDebug() &lt;&lt; "Can't open file!";
  
      if(avformat_write_header(outFormatContext, NULL) &lt; 0) qDebug() &lt;&lt; "Can't write header!";
  
  }
  
  
  
  void MainWindow::collectFrames()
  
  {
  
      QtConcurrent::run([this](){
  
  
  
          AVFrame* inFrame = av_frame_alloc();
  
          inFrame->format = inputCodecContext->pix_fmt;
  
          inFrame->width = inputCodecContext->width;
  
          inFrame->height = inputCodecContext->height;
  
  
  
          int size = av_image_alloc(inFrame->data, inFrame->linesize, inFrame->width, inFrame->height, inputCodecContext->pix_fmt, 1);
  
  
  
          AVFrame* outFrame = av_frame_alloc();
  
          outFrame->format = outCodecContext->pix_fmt;
  
          outFrame->width = outCodecContext->width;
  
          outFrame->height = outCodecContext->height;
  
  
  
          av_image_alloc(outFrame->data, outFrame->linesize, outFrame->width, outFrame->height, outCodecContext->pix_fmt, 1);
  
  
  
          AVPacket packet;
  
          av_init_packet(&amp;packet);
  
  
  
          while(isRunning &amp;&amp; (av_read_frame(inputFormatContext, &amp;packet) >= 0))
  
          {
  
              if(packet.stream_index == videoStream->index)
  
              {
  
                  //for gdigrab
  
  //                uint8_t* result = new uint8_t[inFrame->width * inFrame->height * 4];
  
  //                for (int i = 0; i &lt; inFrame->height * inFrame->width * 4; i += 4)
  
  //                {
  
  //                    result[i + 0] = packet.data[i + 2]; //B
  
  //                    result[i + 1] = packet.data[i + 3]; //G
  
  //                    result[i + 2] = packet.data[i + 0]; //R
  
  //                    result[i + 3] = packet.data[i + 1]; //A
  
  //                }
  
  
  
  //                memcpy(inFrame->data[0], result, size);
  
  //                delete result;
  
  
  
                  QImage image(packet.data, inFrame->width, inFrame->height, QImage::Format_ARGB32);
  
                  QImage mirrored = image.mirrored(false, true);
  
                  emit imageReady(mirrored);
  
  
  
                  memcpy(inFrame->data[0], mirrored.bits(), size);
  
  
  
                  sws_scale(swsContext, inFrame->data, inFrame->linesize, 0, inputCodecContext->height, outFrame->data, outFrame->linesize);
  
  
  
                  av_packet_unref(&amp;packet);
  
  
  
                  AVPacket outPacket;
  
                  av_init_packet(&amp;outPacket);
  
  
  
                  int encodeResult = AVERROR(EAGAIN);
  
                  while(encodeResult == AVERROR(EAGAIN))
  
                  {
  
                      if(avcodec_send_frame(outCodecContext, outFrame)) qDebug() &lt;&lt; "Send frame error!";
  
  
  
                      encodeResult = avcodec_receive_packet(outCodecContext, &amp;outPacket);
  
                  }
  
                  if(encodeResult != 0) qDebug() &lt;&lt; "Encoding error!" &lt;&lt; encodeResult;
  
  
  
                  if(outPacket.pts != AV_NOPTS_VALUE) outPacket.pts = av_rescale_q(outPacket.pts, videoStream->codec->time_base, videoStream->time_base);
  
                  if(outPacket.dts != AV_NOPTS_VALUE) outPacket.dts = av_rescale_q(outPacket.dts, videoStream->codec->time_base, videoStream->time_base);
  
  
  
                  av_interleaved_write_frame(outFormatContext, &amp;outPacket);
  
  
  
                  av_packet_unref(&amp;outPacket);
  
              }
  
          }
  
  
  
          av_freep(inFrame->data);
  
          av_freep(outFrame->data);
  
  
  
          av_write_trailer(outFormatContext);
  
          avio_close(outFormatContext->pb);
  
      });
  
  
  
  }
  
  </qvideoframe></qthreadpool></qimage></qlayout></qtimer></qscreen></qlabel></qguiapplication>