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• How to swap package configuration for environment

  24 juillet 2018, par Finn Maunsell

  I’d like to change the location that I get ffmpeg from for my anaconda environment. The problem has occured because I want to use the ffmpeg configuration for my base system instead of the configuration meant for the environment.

  If I use ffmpeg in ubuntu bash then I get this for my active environment :

    ffmpeg version N-91510-gd134b8d Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/home/notebook/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/notebook/ffmpeg_build/include --extra-ldflags=-L/home/notebook/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/notebook/bin --enable-gpl --enable-libaom --enable-openssl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree

  and for non-environment :

  ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.8.2 (GCC) 20140120 (Red Hat 4.8.2-15)
  
    configuration: --prefix=/home/notebook/anaconda2/envs/tensorflow --disable-doc --enable-shared --enable-static --extra-cflags='-Wall -g -m64 -pipe -O3 -march=x86-64 -fPIC -I/home/notebook/anaconda2/envs/tensorflow/include' --extra-cxxflags='=-Wall -g -m64 -pipe -O3 -march=x86-64 -fPIC' --extra-libs=
  
  '-L/home/notebook/anaconda2/envs/tensorflow/lib -lz' --enable-pic --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --enable-libx264

  Solving this will allow me to use the 2nd ffmpeg installation in my conda environment.

• 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 ?