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• ASP.NET MVC - Converting Video Format From Email Attachment Scanner

  24 juillet 2018, par BenHayward

  We have a Quartz scheduler that scans the company email account every 60 seconds, and will process those emails accordingly. Any attachments are stored in a byte array.

  Video attachments need to be converted to an MP4 and then back to a byte array to be stored in the DB ; I am trying to use FFMPEG (fflib) to complete this, however I’m having trouble figuring out how it can be done with a byte array as the source - the company have stated that this conversion must be done before it enters the database.

  Is the conversion of a byte array possible using the Process Class to access the FFMPEG CLI ?

  Here is the code I currently have, just using local file locations (using fflib ffmpeg library).

   public IList<documentstoreattachment> AddDocumentsToDocumentStore(IList<fileattachment> documentsToStore, Guid personId, IList<documentattributedto> documentAttributes)
  
          {
  
              var storedDocuments = new List<documentstoreattachment>();
  
  
  
              foreach (var documentToStore in documentsToStore)
  
              {
  
                  try
  
                  {
  
                      if (IsExtensionAllowed(documentToStore.AttachmentName))
  
                      {
  
  
  
                          if (documentToStore.MimeType == "mpeg")
  
                          {
  
                              Job2Convert job = new Job2Convert()
  
                              {
  
                                  pszSrcFile = @"..\..\Amigo Loans 2018 Advert MPG.mpg",
  
                                  pszDstFile = @"C:\Users\ben.hayward\Desktop\Amigo Loans 2018 Advert MPG.mp4",
  
  
  
                                  pszDstFormat = "mp4",
  
                                  pszAudioCodec = "aac",
  
  
  
                                  nAudioChannels = 2,
  
                                  nAudioBitrate = -1,
  
                                  nAudioRate = -1,
  
  
  
                                  pszVideoCodec = "h264",
  
  
  
                                  nVideoBitrate = -1,
  
                                  nVideoFrameRate = -1,
  
                                  nVideoFrameWidth = -1,
  
                                  nVideoFrameHeight = -1
  
  
  
                              };
  
  
  
                              _sut.ConvertFile(job);
  
  
  
                          }
  
  
  
                          storedDocuments.Add(AddDocumentToDocumentStore(documentToStore.AttachmentName, documentToStore.ByteArray, documentToStore.MimeType, personId, documentAttributes));
  
                      }
  
                      else
  
                      {
  
                          Logger.WarnFormat("AddDocumentsToDocumentStore: File extension not allowed for file name: {0}, person id: {1}", documentToStore.AttachmentName, personId);
  
                      }
  
                  }
  
                  catch (Exception e)
  
                  {
  
                      #region Error
  
  
  
                      Logger.Error(String.Format("There was a problem saving the document to the document store. The file name was {0}, person id: {1}",
  
                          documentToStore.AttachmentName, personId), e);
  
  
  
                      #endregion
  
                  }
  
              }
  
  
  
              return storedDocuments;
  
          }
  
  </documentstoreattachment></documentattributedto></fileattachment></documentstoreattachment>

  Thank you in advance.

• Fixing a corrupted .MP4 file. which might be a 3gp file

  2 juin 2020, par Tendekai Muchenje

  I have a file called input.MP4 and it is corrupted. It's from a CCTV camera. I tried everything, ffmpeg, VLC convert, no luck. However, I used mediainfo and exiftool and extracted the following info. I am wondering if someone can figure out if I can use any of this info to fix it or convert it to a usable format. I have a copy of it here on my Google Drive

  



  mediainfo gave me this :

  



  General
Complete name                       : input.MP4
Format                              : MPEG-4
Format profile                      : 3GPP Media Release 5
Codec ID                            : 3gp5 (3gp5/3gp4/avc1/mp42/isom)
File size                           : 5.77 MiB
IsTruncated                         : Yes


  



  exiftool gave me this :

  



  ExifTool Version Number          : 10.80
File Name                        : input.MP4
Directory                        : /home/tendi/Downloads
File Size                        : 5.8 MB
File Modification Date/Time      : 2018:07:21 19:09:03-04:00
File Access Date/Time            : 2018:07:21 19:30:48-04:00
File Inode Change Date/Time      : 2018:07:21 19:30:48-04:00
File Permissions                 : rw-rw-r--
File Type                        : 3GP
File Type Extension              : 3gp
MIME Type                        : video/3gpp
Major Brand                      : 3GPP Media (.3GP) Release 5
Minor Version                    : 0.0.0
Compatible Brands                : 3gp5, 3gp4, avc1, mp42, isom
Movie Data Size                  : 5899106
Movie Data Offset                : 44


  



  Any suggestions ?

  


• Unable to find a suitable output format while cutting video

  22 juillet 2018, par Java Android

  I am using below command to cut video-

  String complexCommand = new String[]{"-y", "-i", yourRealPath, "-ss", "" + startMs / 1000, "-t", "" + (endMs - startMs) / 1000, "-c", "copy", filePath};

  I got below error -

  "ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers\n
  built with gcc 4.8 (GCC)\n configuration : —target-os=linux
  —cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-
  —arch=arm —cpu=cortex-a8 —enable-runtime-cpudetect —sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot
  —enable-pic —enable-libx264 —enable-libass —enable-libfreetype —enable-libfribidi —enable-libmp3lame —enable-fontconfig —enable-pthreads —disable-debug —disable-ffserver —enable-version3 —enable-hardcoded-tables —disable-ffplay —disable-ffprobe —enable-gpl —enable-yasm —disable-doc —disable-shared —enable-static —pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config —prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a —extra-cflags=’-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include
  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all’ —extra-ldflags=’-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib
  -Wl,-z,relro -Wl,-z,now -pie’ —extra-libs=’-lpng -lexpat -lm’ —extra-cxxflags=\n libavutil 55. 17.103 / 55. 17.103\n libavcodec 57. 24.102 / 57. 24.102\n libavformat 57. 25.100 /
  57. 25.100\n libavdevice 57. 0.101 / 57. 0.101\n libavfilter 6. 31.100 / 6. 31.100\n libswscale 4. 0.100 / 4. 0.100\n libswresample 2. 0.101 / 2. 0.101\n libpostproc 54. 0.100 /
  54. 0.100\nInput #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/Download/file3gpp.3gpp’ :\n Metadata :\n
  major_brand : 3gp4\n minor_version : 0\n
  compatible_brands : isom3gp4\n creation_time : 2018-04-09
  12:04:29\n com.android.version : 7.1.1\n Duration : 00:00:04.88,
  start : 0.000000, bitrate : 1425 kb/s\n Stream #0:0(eng) : Audio : aac
  (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 96 kb/s (default)\n
  Metadata :\n creation_time : 2018-04-09 12:04:29\n
  handler_name : SoundHandle\n[NULL @ 0xf622a600] Unable to find a
  suitable output format for
  ’/storage/emulated/0/Movies/cut_video.3gpp’\n/storage/emulated/0/Movies/cut_video.3gpp :
  Invalid argument\n"

  Why am i getting this error and how can i resolve it ?