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• FFmpeg watermark duration

  4 mai 2016, par user2364292

  I am developing an Android app, which will work with FFmpeg library which only applies multiple watermarks on some test.mp4 video. For that case I am using the Android java library for FFmpeg binary from that source : [http://writingminds.github.io/ffmpeg-android-java/] which is working fine for some examples, but I just can not use commands like these :

  -i /storage/emulated/0/Download/test.mp4 -vf "movie=/storage/emulated/0/Download/test.mp4 [logo]; [in][logo] overlay=W-w-10:H-h-10, fade=in:0:20 [out]" /storage/emulated/0/Download/test.mp4

  Please note these quotes after -vf flag and these [in], [logo] flags. These just throw me an errors like

  [NULL @ 0xb5bf3200] Unable to find a suitable output format for '[logo];'
  
  [logo];: Invalid argument

  and so on. The quotes in the command are also the problem which throws me an error like :

  [AVFilterGraph @ 0xb5c092c0] No such filter: 'overlay=main_w-50:main_h-50,overlay=0:0'
  
  Error initializing complex filters.
  
  Invalid argument".

  Am I even using proper library for that case ? I also want to show the watermark in specific duration of the video. For example if video is 10 seconds long, I only want watermark to be shown starting from 3rd second of the video to 7th second. I can show the overlay images like this :

  -i /storage/emulated/0/Download/test.mp4 -i /storage/emulated/0/Download/test.jpg -i /storage/emulated/0/Download/test.jpg -filter_complex overlay=main_w-50:main_h-50,overlay=0:0 -codec:a copy /storage/emulated/0/Download/test_edited.mp4

  but they’re shown for the whole video duration. Where can I set the duration start/end for the specific overlay ?

  Thank you very much !

• From URL of Video GetThumbnail Using Nreco

  8 février 2016, par Muhammad Abid Fahad

  I working on a sharepoint project in which i have to upload the videos in the document library as videoset. after creating a video set i have have to upload the video and fetch the thumbnail from the video and upload it. video is uploaded succesfully using

  spfile = item.Folder.Files.Add(fuUpload.FileName, fuUpload.PostedFile.InputStream, true);

  I am using using Nreco to get thumbnail from the video. However my code works fine on local machine but its giving error "http://mysite/Download/abc/abc.mp4 : Server returned 401 Unauthorized (authorization failed) (exit code : 1)" when i am using my application from other pc browsers.

  ffMpeg.GetVideoThumbnail(videoPath, ms, 10) ; the error line.

  here is the code i am using

  private MemoryStream SaveThumbnail(string videoPath) 
  
      {
  
          MemoryStream ms; 
  
          try 
  
          {
  
              videoPath = "http://mysitehttp/Download/abc/abc.mp4"
  
              ms = new MemoryStream();
  
              SPSecurity.RunWithElevatedPrivileges(delegate() {
  
  
  
                  var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
  
                  ffMpeg.GetVideoThumbnail(videoPath, ms, 10); 
  
              });
  
  
  
  
  
          }
  
          catch(Exception ex)
  
          {
  
              throw ex;
  
          }
  
  
  
          return ms;
  
      }

• How to store a raw RTSP video stream to a file ?

  12 janvier 2016, par Siva Prasanna

  I’m playing around with the open source FFMpeg tool. I want to save an RTSP video stream to a local file. I came across this question and I tried executing a similar command, but its not working. It doesn’t throw any error either. My command is :
  ffmpeg -i rtsp://test.vibrtech.com/mov/video.sav?MAC=00C2100F124^&channel=2^&GUID=betauser -acodec copy -vcodec copy c:/video.mp4

  but when I execute this command all I’m getting is this(with the cursor being blinked like forever, until I manually invoke ctrl+c) :

  D:\..\bin>ffmpeg -i rtsp://test.vibrtech.com/mov/video.sav?MAC=00C2100F124^&channel=2^&GUID=betauser -acodec copy -vcodec copy c:/video.mp4
  
  
  
  ffmpeg version N-77704-g68eb208 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls 
  
  --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca 
  
  --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm 
  
  --enable-libilbc --enable-libmodplug --enable-libmp3lame 
  
  --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg 
  
  --enable-libopus --enable-librtmp --enable-libschroedinger 
  
  --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame 
  
  --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
  --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp 
  
  --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid 
  
  --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 12.100 / 55. 12.100
  
    libavcodec     57. 21.100 / 57. 21.100
  
    libavformat    57. 21.100 / 57. 21.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 23.100 /  6. 23.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  _

  Can anyone tell me what I’m doing wrong here ? Or is there any way this could be achieved by using other commands ?

  P.S : I’m getting the stream from this url : rtsp ://test.vibrtech.com/mov/video.sav ?MAC=00C2100F124&channel=2&GUID=betaUser