Rob Rob - 1 year ago 212 Question

compile ffmpeg decode only without audio codecs

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
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
Return False
End Try
If IO.File.Exists(FullPathAndFilename) Then
Dim myProcess As Process = New Process
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
If File.Exists(SavePath) Then Return True
Catch ex As Exception
Throw ex
End Try
End If
End If
Return False
End Function

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

Answer Source

There is an option --disable-everything which will disable all components without enabling explicitly.

I guess you may try to build it with:

./configure --disable-everything --enable-libx264 --enable-libx265 --toolchain=msvc --enable-yasm --enable-asm

If there is any other codecs needed, they should be added to the option too.

And if some ffmpeg libs are not needed, they can be disabled like:

./configure --disable-postproc

See the Component options part in ./configure --help output for how to disable/enable those libs.

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