Recherche avancée

Sur d’autres sites (6436)

• How can I convert a mp4 into an ogv with ffmpeg ? I am getting a "segmentation fault"

  8 mars 2020, par xrainbowuk

  I am trying to use ffmpeg to convert a mp4 video into an ogv and a webm. I am using a Mac and this is what I am putting into the terminal :

  ffmpeg -i "Hands-typing-(mobile-1080p-loop) copy.mp4" -codec:v libtheora -codec:a libvorbis -f ogv output.ogv

  This is what I am getting in response :

      ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Hands-typing-(mobile-1080p-loop) copy.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42mp41
  
      creation_time   : 2020-03-04T20:14:21.000000Z
  
    Duration: 00:00:21.18, start: 0.000000, bitrate: 8201 kb/s
  
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 8085 kb/s, 30 fps, 30 tbr, 30k tbn, 60k tbc (default)
  
      Metadata:
  
        creation_time   : 2020-03-04T20:14:21.000000Z
  
        handler_name    : ?Mainconcept Video Media Handler
  
        encoder         : AVC Coding
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
  
      Metadata:
  
        creation_time   : 2020-03-04T20:14:21.000000Z
  
        handler_name    : #Mainconcept MP4 Sound Media Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> theora (libtheora))
  
    Stream #0:1 -> #0:1 (aac (native) -> vorbis (libvorbis))
  
  Press [q] to stop, [?] for help
  
  zsh: segmentation fault  ffmpeg -i "Hands-typing-(mobile-1080p-loop) copy.mp4" -codec:v libtheora   -f

  I have also tried this, which doesn’t work :

  ffmpeg -i "Hands-typing-(mobile-1080p-loop) copy.mp4" -codec:v libtheora -qscale:v 3 -codec:a libvorbis \
  
    -qscale:a 3 -f ogv output.ogv

  I am struggling to find the answer to my question. Especially as there are so many posts about "segmentation faults".

  Any help is very much appreciated.

• ios Crash when convert yuvj420p to CVPixelBufferRef use ffmpeg

  20 mars 2020, par jansma

  I need to get rtsp steam from ip camera and convert the AVFrame data to CVPixelBufferRef
  in order to send the data to other sdk

  First I use avcodec_decode_video2 to decode video data

  After decode the video I convert the data to CVPixelBufferRef this is my code

  size_t srcPlaneSize = pVideoFrame_->linesize[1]*pVideoFrame_->height;
  
  size_t dstPlaneSize = srcPlaneSize *2;
  
  uint8_t *dstPlane = malloc(dstPlaneSize);
  
  void *planeBaseAddress[2] = { pVideoFrame_->data[0], dstPlane };
  
  
  
  // This loop is very naive and assumes that the line sizes are the same.
  
  // It also copies padding bytes.
  
  assert(pVideoFrame_->linesize[1] == pVideoFrame_->linesize[2]);
  
  for(size_t i = 0; i/ These might be the wrong way round.
  
      dstPlane[2*i  ]=pVideoFrame_->data[2][i];
  
      dstPlane[2*i+1]=pVideoFrame_->data[1][i];
  
  }
  
  
  
  // This assumes the width and height are even (it's 420 after all).
  
  assert(!pVideoFrame_->width%2 && !pVideoFrame_->height%2);
  
  size_t planeWidth[2] = {pVideoFrame_->width, pVideoFrame_->width/2};
  
  size_t planeHeight[2] = {pVideoFrame_->height, pVideoFrame_->height/2};
  
  // I'm not sure where you'd get this.
  
  size_t planeBytesPerRow[2] = {pVideoFrame_->linesize[0], pVideoFrame_->linesize[1]*2};
  
  int ret = CVPixelBufferCreateWithPlanarBytes(
  
          NULL,
  
          pVideoFrame_->width,
  
          pVideoFrame_->height,
  
          kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange,
  
          NULL,
  
          0,
  
          2,
  
          planeBaseAddress,
  
          planeWidth,
  
          planeHeight,
  
          planeBytesPerRow,
  
          NULL,
  
          NULL,
  
          NULL,
  
          &pixelBuf);

  After I run the app the application will crash on

  dstPlane[2*i  ]=pVideoFrame_->data[2][i];

  How to resove this question ?

  this is console in xcode

  All info found
  
  Setting avg frame rate based on r frame rate
  
  stream 0: start_time: 0.080 duration: -102481911520608.625
  
  format: start_time: 0.080 duration: -9223372036854.775 bitrate=0 kb/s
  
  nal_unit_type: 0, nal_ref_idc: 0
  
  nal_unit_type: 7, nal_ref_idc: 3
  
  nal_unit_type: 0, nal_ref_idc: 0
  
  nal_unit_type: 8, nal_ref_idc: 3
  
  Ignoring NAL type 0 in extradata
  
  Ignoring NAL type 0 in extradata
  
  nal_unit_type: 7, nal_ref_idc: 3
  
  nal_unit_type: 8, nal_ref_idc: 3
  
  nal_unit_type: 6, nal_ref_idc: 0
  
  nal_unit_type: 5, nal_ref_idc: 3
  
  unknown SEI type 229
  
  Reinit context to 800x608, pix_fmt: yuvj420p
  
  (lldb) 

  

• First upload video and display upload progress and then convert video using ffmpeg and display progress

  21 avril 2020, par Salman

  I am working on a video sharing platform. What I want to do is that when user upload a video, it first shows an upload progress bar and after completing upload it shows another progress bar for ffmpeg execution time remaining.

  



  I am using this jQuery code for displaying upload progress bar.

  



  $("body").on("submit", "form[name='upload']", function(e) {
    e.preventDefault();
    var formData = new FormData(this);
    $.ajax({
        cache: false,
        contentType: false,
        data: formData,
        dataType: "json",
        method: "POST",
        processData: false,
        url: "upload.php",
        error: function() {
            alert("Sorry, something went wrong!");
        },
        xhr: function() {
            var xhr = new window.XMLHttpRequest();
            xhr.upload.addEventListener("progress", function(evt) {
                if (evt.lengthComputable) {
                    var percentComplete = (evt.loaded / evt.total) * 100;
                    $(".upload .progress-bar").css({
                        "width": percentComplete + "%"
                    });
                }
            }, false);

            return xhr;
        }
    });
});


  



  And I am using this php code for executing video in ffmpeg.

  



  shell_exec('ffmpeg -i uploads/video.mp4 -c:a copy -s 256x144 uploads/video_144p.mp4 > uploads/output.log 2>&1');


  



  It generates an "output.log" file.
Now in jQuery I can GET the content of this log file and display the progress after little calculations.
This is the jQuery code

  



  $.ajax({
    type: "GET",
    cache: false,
    url: "uploads/output.log",
    success: function(response) {
        var duration = 0;
        var time = 0;
        var progress = 0;

        var matches = (response) ? response.match(/Duration: (.*?), start:/) : [];
        if (matches.length > 0) {
            var rawDuration = matches[1];

            var arrayReverse = rawDuration.split(":").reverse();
            duration = parseFloat(arrayReverse[0]);
            if (arrayReverse[1]) duration += parseInt(arrayReverse[1]) * 60;
            if (arrayReverse[2]) duration += parseInt(arrayReverse[2]) * 60 * 60;

            matches = response.match(/time=(.*?) bitrate/g);
            console.log(matches);

            if (matches.length > 0) {
                var rawTime = matches.pop();

                if (Array.isArray(rawTime)) {
                    rawTime = rawTime.pop().replace("time=", "").replace(" bitrate", "");
                } else {
                    rawTime = rawTime.replace("time=", "").replace(" bitrate", "");
                }

                arrayReverse = rawTime.split(":").reverse();
                time = parseFloat(arrayReverse[0]);
                if (arrayReverse[1]) time += parseInt(arrayReverse[1]) * 60;
                if (arrayReverse[2]) time += parseInt(arrayReverse[2]) * 60 * 60;

                progress = Math.round((time / duration) * 100);
            }
        }
        $(".execution .progress-bar").css({
            "width": progress + "%"
        });
    }
});


  



  Now I want a single AJAX code which will upload my file first and display "Upload progress" and after that it will execute my video in php FFMPEG and display "Execution progress"