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• How can I delete all folders of a specific name without deleting Contents in it [on hold]

  17 janvier 2015, par Chatcafe

  How do I delete all Folders with a specific name (e.g. 128Kbps_Songs) without deleting its files

  For example if I have directory "MP3_SONGS" with subdirectories "A", "B", "C" and each subdirectory has MANY directory Contains Film Name "FILM_NAME1", "FILM_NAME2", "FILM_NAME3" in it, In That Each Film NAme I have specific Folder NAme (128Kbps_Songs) in this "128Kbps_Songs" Folder I have That Film mp3 Songs Files
  
  
  
  how can I remove the Folder "128Kbps_Songs", in Each Film_Name directory and Have to get these mp3 songs in that FILM_NAME.. ( Have to Delete 128Kbps_Songs Folder in all FILM_NAME without deleting the mp3 Songs in it, have to get the mp3 in FILM_NAME Directory..
  
  
  
  
  
  MP3_SONGS (Parent Directory) ------ A , B, C
  
  
  
  A (Sub Directory1) ------ FILM_NAME1 , FILM_NAME2
  
  B (Sub Directory2) ------ FILM_NAME3 , FILM_NAME4
  
  c (Sub Directory3) ------ FILM_NAME5 , FILM_NAME6
  
  
  
  FILM_NAME1 (Directory) ---- 128Kbps_Songs (Directory) ------ FILM_NAME1(MP3 Files)
  
  FILM_NAME2 (Directory) ---- 128Kbps_Songs (Directory) ------ FILM_NAME2(MP3 Files)
  
  
  
  FILM_NAME3 (Directory) ---- 128Kbps_Songs (Directory) ------ FILM_NAME3 MP3 Files
  
  FILM_NAME4 (Directory) ---- 128Kbps_Songs (Directory) ------ FILM_NAME4 MP3 Files
  
  
  
  FILM_NAME5 (Directory) ---- 128Kbps_Songs (Directory) ------ FILM_NAME5 MP3 Files
  
  FILM_NAME6 (Directory) ---- 128Kbps_Songs (Directory) ------ FILM_NAME6 MP3 Files
  
  
  
  Need Files in:
  
  FILM_NAME1 (Directory)  ------ FILM_NAME1 MP3 Files
  
  
  
  FILM_NAME2 (Directory)  ------ FILM_NAME2 MP3 Files
  
  
  
  FILM_NAME3 (Directory)  ------ FILM_NAME3 MP3 Files
  
  
  
  FILM_NAME4 (Directory)  ------ FILM_NAME4 MP3 Files
  
  
  
  FILM_NAME5 (Directory)  ------ FILM_NAME5 MP3 Files
  
  
  
  FILM_NAME6 (Directory)  ------ FILM_NAME6 MP3 Files
  
  
  
  > if 128Kbps_Songs directory exits there only want this changes

• Problems accessing codecs with ggplot and gganimate

  19 décembre 2016, par noLongerRandom

  Using gganimate. Can’t figure out how to properly access functionality of ffmpeg, specifically I want to change the codec I’m using in the video file I’m outputting.

  # load packages
  
  library(ggplot)
  
  library(animation)
  
  library(gganimate)
  
  
  
  # Here's my data.frame
  
  myDf <- data.frame(
  
      year = c(1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014), 
  
      bottom50 = c(0.195, 0.191, 0.187, 0.192, 0.196, 0.205, 0.207, 0.210, 0.209, 0.204, 0.203, 0.204, 0.205, 0.203, 0.202, 0.200, 0.200, 0.201, 0.199, 0.195, 0.190, 0.183, 0.179, 0.179, 0.177, 0.172, 0.169, 0.169, 0.168, 0.166, 0.158, 0.159, 0.158, 0.154, 0.151, 0.148, 0.149, 0.148, 0.146, 0.149, 0.148, 0.145, 0.142, 0.138, 0.135, 0.137, 0.137, 0.136, 0.130, 0.127, 0.123, 0.127, 0.125), top1 = c(0.126, 0.127, 0.129, 0.128, 0.126, 0.123, 0.122, 0.115, 0.110, 0.111, 0.111, 0.109, 0.106, 0.105, 0.105, 0.107, 0.108, 0.111, 0.107, 0.110, 0.112, 0.115, 0.125, 0.125, 0.122, 0.133, 0.149, 0.145, 0.145, 0.139, 0.150, 0.146, 0.147, 0.153, 0.160, 0.166, 0.169, 0.177, 0.183, 0.173, 0.171, 0.172, 0.183, 0.194, 0.201, 0.199, 0.195, 0.185, 0.198, 0.196, 0.208, 0.196, 0.202)
  
  )
  
  
  
  #Basic plot
  
  p <- ggplot(myDf, aes(x = year, y = bottom50, frame = year)) + 
  
      geom_line(color = "dodgerblue") + 
  
      geom_line(aes(y = top1), color = "darkred")

  The non-animated version gets me what I want :

  

  And I get an animation version output to video with :

  gganimate(p, interval = .1, title_frame = FALSE, "income.mp4")

  That’s fine, but I want to change some the output parameters, specifically : alter the dimensions, the frame rate, and use a different codec.

  # change some of the options
  
  ani.options(ani.height = 1080, ani.width = 1920, 
  
              interval = 0.04166667, other.opts = "-vcodec qtrle -f mov")
  
  # re-animate
  
  gganimate(p, title_frame = FALSE, "income.mov")

  That gives me the following error :

  Error in animation_saver(saver, filename) : 
  
    Don't know how to save animation of type mov

  I’m using ’.mov’ as my file extension because I’m trying to change to the Animation codec (so it’s no longer a .mp4 wrapper). I’ve got ffmpeg installed, so this is probably a syntax issue. But the documentation isn’t very clear here ; gganimate doesn’t have any documentation on changing codecs (or outputting any video besides an mp4), and the animation package is light on specifics as well.

• Using ffmpeg to capture frames from webcam and audio from micro and saving to file

  19 septembre 2016, par Solidus

  For the past few weeks I’ve been struggling with the ffmpeg API since I can not find a clear documentation and I also find it hard to search as all the solutions I find online involve not the c API but the ffmpeg.c command line program. I am creating a program which needs to capture video from a webcam and audio, show the frames on screen and record both the audio and frames to a video file. I am also using QT as a framework for this project.

  I’ve been able to show the frames on the screen and even record them, but my problem is the record of both the audio and video. I’ve decided to create a simpler program for tests, that only saves the stream to a file without showing the frames on screen, starting from the remuxing.c example on the ffmpeg documentation. My code is as follows :

  //This is the variables on the .h
  
  AVOutputFormat *ofmt;
  
  AVFormatContext *ifmt_ctx, *ofmt_ctx;
  
  
  
  QString cDeviceName;
  
  QString aDeviceName;
  
  
  
  int audioStream, videoStream;
  
  bool done;
  
  
  
  //The .cpp
  
  #include "cameratest.h"
  
  #include <qtconcurrent></qtconcurrent>QtConcurrent>
  
  #include <qdebug>
  
  
  
  CameraTest::CameraTest(QString cDeviceName, QString aDeviceName, QObject *parent) :
  
      QObject(parent)
  
  {
  
      done = false;
  
      this->cDeviceName = cDeviceName;
  
      this->aDeviceName = aDeviceName;
  
      av_register_all();
  
      avdevice_register_all();
  
  }
  
  
  
  void CameraTest::toggleDone() {
  
      done = !done;
  
  }
  
  
  
  int CameraTest::init() {
  
      ofmt = NULL;
  
      ifmt_ctx = NULL;
  
      ofmt_ctx = NULL;
  
  
  
      QString fullDName = cDeviceName.prepend("video=") + ":" + aDeviceName.prepend("audio="); 
  
      qDebug() &lt;&lt; fullDName;
  
      AVInputFormat *fmt = av_find_input_format("dshow");
  
  
  
      int ret, i;
  
  
  
      if (avformat_open_input(&amp;ifmt_ctx, fullDName.toUtf8().data(), fmt, NULL) &lt; 0) {
  
         fprintf(stderr, "Could not open input file '%s'", fullDName.toUtf8().data());
  
         return -1;
  
      }
  
      if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) &lt; 0) {
  
         fprintf(stderr, "Failed to retrieve input stream information");
  
         return -1;
  
      }
  
      av_dump_format(ifmt_ctx, 0, fullDName.toUtf8().data(), 0);
  
      avformat_alloc_output_context2(&amp;ofmt_ctx, NULL, NULL, "test.avi");
  
      if (!ofmt_ctx) {
  
         fprintf(stderr, "Could not create output context\n");
  
         ret = AVERROR_UNKNOWN;
  
         return -1;
  
      }
  
      ofmt = ofmt_ctx->oformat;
  
  
  
      for (i = 0; i &lt; ifmt_ctx->nb_streams; i++) {
  
         AVStream *in_stream = ifmt_ctx->streams[i];
  
         AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);
  
  
  
         if (ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
  
             videoStream = i;
  
         }
  
         else if (ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
  
             audioStream = i;
  
         }
  
  
  
         if (!out_stream) {
  
             fprintf(stderr, "Failed allocating output stream\n");
  
             ret = AVERROR_UNKNOWN;
  
             return -1;
  
         }
  
         ret = avcodec_copy_context(out_stream->codec, in_stream->codec);
  
         if (ret &lt; 0) {
  
             fprintf(stderr, "Failed to copy context from input to output stream codec context\n");
  
             return -1;
  
         }
  
         out_stream->codec->codec_tag = 0;
  
         if (ofmt_ctx->oformat->flags &amp; AVFMT_GLOBALHEADER)
  
             out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
      }
  
      av_dump_format(ofmt_ctx, 0, "test.avi", 1);
  
      if (!(ofmt->flags &amp; AVFMT_NOFILE)) {
  
         ret = avio_open(&amp;ofmt_ctx->pb, "test.avi", AVIO_FLAG_WRITE);
  
         if (ret &lt; 0) {
  
             fprintf(stderr, "Could not open output file '%s'", "test.avi");
  
             return -1;
  
         }
  
      }
  
      ret = avformat_write_header(ofmt_ctx, NULL);
  
      if (ret &lt; 0) {
  
         fprintf(stderr, "Error occurred when opening output file\n");
  
         return -1;
  
      }
  
      QtConcurrent::run(this, &amp;CameraTest::grabFrames);
  
      return 0;
  
  }
  
  
  
  void CameraTest::grabFrames() {
  
      AVPacket pkt;
  
      int ret;
  
      while (av_read_frame(ifmt_ctx, &amp;pkt) >= 0) {
  
          AVStream *in_stream, *out_stream;
  
          in_stream  = ifmt_ctx->streams[pkt.stream_index];
  
          out_stream = ofmt_ctx->streams[pkt.stream_index];
  
          /* copy packet */
  
          pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, (AVRounding) (AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
  
          pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, (AVRounding) (AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
  
          pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
  
          pkt.pos = -1;
  
          int ret = av_interleaved_write_frame(ofmt_ctx, &amp;pkt);
  
          if (ret &lt; 0) {
  
             qDebug() &lt;&lt; "Error muxing packet";
  
             //break;
  
          }
  
          av_free_packet(&amp;pkt);
  
  
  
          if(done) break;
  
      }
  
      av_write_trailer(ofmt_ctx);
  
  
  
      avformat_close_input(&amp;ifmt_ctx);
  
      /* close output */
  
      if (ofmt_ctx &amp;&amp; !(ofmt->flags &amp; AVFMT_NOFILE))
  
         avio_close(ofmt_ctx->pb);
  
      avformat_free_context(ofmt_ctx);
  
      if (ret &lt; 0 &amp;&amp; ret != AVERROR_EOF) {
  
          //return -1;
  
         //fprintf(stderr, "Error occurred: %s\n", av_err2str(ret));
  
      }
  
  }
  
  </qdebug>

  The av_interleaved_write_frame returns an error with the video packets. The end file shows only the first frame but the audio seems to be ok.

  On the console this is what is printed :

  Input #0, dshow, from 'video=Integrated Camera:audio=Microfone interno (Conexant 206':
  
    Duration: N/A, start: 146544.738000, bitrate: 1411 kb/s
  
      Stream #0:0: Video: rawvideo, bgr24, 640x480, 30 tbr, 10000k tbn, 30 tbc
  
      Stream #0:1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
  
  Output #0, avi, to 'test.avi':
  
      Stream #0:0: Video: rawvideo, bgr24, 640x480, q=2-31, 30 tbc
  
      Stream #0:1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
  
  
  
  [avi @ 0089f660] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  [avi @ 0089f660] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  [avi @ 0089f660] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 4396365 >= 4396365
  
  [avi @ 0089f660] Too large number of skipped frames 4396359 > 60000
  
  [avi @ 0089f660] Too large number of skipped frames 4396360 > 60000
  
  [avi @ 0089f660] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 4396390 >= 4396390
  
  [avi @ 0089f660] Too large number of skipped frames 4396361 > 60000
  
  [avi @ 0089f660] Too large number of skipped frames 4396362 > 60000
  
  [avi @ 0089f660] Too large number of skipped frames 4396364 > 60000
  
  [avi @ 0089f660] Too large number of skipped frames 4396365 > 60000
  
  [avi @ 0089f660] Too large number of skipped frames 4396366 > 60000
  
  [avi @ 0089f660] Too large number of skipped frames 4396367 > 60000

  This seems to me like a simple problem to solve but I really am mostly clueless about the ffmpeg API, if someone could lead me to the right direction that would be great !

  Thanks !