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• Merge commit '3cae7f8b9baaf43789490b676d8f5825f2e1bc2c'

  11 novembre 2017, par James Almer

  Merge commit '3cae7f8b9baaf43789490b676d8f5825f2e1bc2c'
  * commit '3cae7f8b9baaf43789490b676d8f5825f2e1bc2c' :
  
    cbs : Add some read/write tests
  
    http: Reset compressed header flag when starting to read a request
  
    cbs_h264 : Fix writing streams with auxiliary pictures
  
    smacker : fix integer overflow with pts_inc
  
    smacker : return meaningful error codes on failure
  
    pixdesc : Add API to map color property names to enum values
  This commit is a noop, see
  
  6f15f1cdc85350b7adcfb7c50eedb5ecde6a384a
  
  547b8aeed442dbb3b2cf4a2c507c63e869795cfd
  
  7ed47e97297fd5ef473d0cc93f0455adbadaac83
  
  624d4739dbfc950ee756e83ae187f97dc82d10c9
  
  6743351558001764d662bb52b9a3e0bbb63366d6
  
  809b0402dc916b876dfdd6bb9c88f171cf3e77c0
  Merged-by : James Almer <jamrial@gmail.com>
  

• compile ffmpeg decode only without audio codecs

  28 juillet 2016, par Rob

  I work on a media manager and use ffmpeg.exe to extract screenshots.
  With the latest size of ffmpeg.exe exceeding 35MB, I am attempting to build ffmpeg without the majority of its functions, to allow only saving of a frame of video.

  I had thought disabling many of the filters, Audio Codecs etc would shrink the size of ffmpeg to something more manageable.

  Following this guide
  https://pracucci.com/compile-ffmpeg-on-windows-with-visual-studio-compiler.html
  to allow building of ffmpeg using Visual Studio 2015, I have come to the part of ./configuration and hit a wall.
  With so many options and no idea what all of them mean or do, I am asking if someone in the community can give me laymans instructions.

  I also know that I need to build x264, and possible x265 (HEVC), but am not sure if there is anything other codecs needed.
  In the end, I and am hoping to just have the one file, ffmpeg.exe for use in the media manager project.

  The code I use to get a screenshot is as follows

  Public Shared Function CreateScreenShot(ByVal FullPathAndFilename As String, ByVal SavePath As String, ByVal sec As Integer, Optional ByVal Overwrite As Boolean = False) As Boolean
  
      If Not File.Exists(SavePath) Or Overwrite Then
  
          Try
  
              IO.File.Delete(SavePath)
  
          Catch
  
              Return False
  
          End Try
  
          If IO.File.Exists(FullPathAndFilename) Then
  
              Dim myProcess As Process = New Process
  
              Try
  
                  Dim seconds As Integer = sec
  
                  myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
  
                  myProcess.StartInfo.CreateNoWindow = False
  
                  myProcess.StartInfo.FileName = Utilities.applicationPath & "\Assets\ffmpeg.exe"
  
                  Dim proc_arguments As String = "-ss " & seconds.ToString & " -i """ & FullPathAndFilename & """ -vframes:v 1 -an " & """" & SavePath & """"
  
                  myProcess.StartInfo.Arguments = proc_arguments
  
                  myProcess.Start()
  
                  myProcess.WaitForExit()
  
                  If File.Exists(SavePath) Then Return True
  
              Catch ex As Exception
  
                  Throw ex
  
              Finally
  
                  myProcess.Close()
  
              End Try
  
          End If
  
      End If
  
      Return False
  
  End Function

  I hope this is sufficient information, and appreciated any help or suggestions.

• FFMPEG in android

  11 octobre 2011, par Krishnendu

  Ii am trying to reduce the video size capture by default camera (it's generating high resolution video) in Android. Does FFMPEG have a property to encode a video with given resolution ? I try to Google, but all examples are using command line mode for FFMPEG.

  My questions are :

  1. Can we use ffmpeg command line in Android ?
  2. If not then how we will achieve it ?
  3. Can we able record a video directly using ffmpeg in Android ?
  4. Is there any other solution for this ?