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• use ffmpeg in vba to change video format

  3 juillet 2020, par Iban Arriola

  I want to change the video format of the embedded videos that appears in a presentation. I achieve to export the video file to another folder using the following code :

  



          Dim Finame As Variant
        Dim oApp As Object
        Dim StoreFolder As Variant
        Dim Videoname As Variant
        Dim FileNameFolder As Variant

        MkDir "C:\template\videoZip"

        Set oApp = CreateObject("Shell.Application")
        FileNameFolder = "C:\template\videoZip\"
        Finame = ActivePresentation.Path & "\" & ActivePresentation.Name
        StoreFolder = "C:\template\created_files\"
        oApp.Namespace("C:\template\videoZip\").CopyHere Finame
        Name "C:\template\videoZip\" & ActivePresentation.Name As "C:\template\videoZip\" & ActivePresentation.Name & ".zip"


        oApp.Namespace(FileNameFolder).CopyHere oApp.Namespace("C:\template\videoZip\" & ActivePresentation.Name & ".zip").items

        Dim firstCount As Integer
        Dim lastCount As Integer

        For j = 1 To videoNum
            firstCount = oApp.Namespace(StoreFolder).items.count
            Videoname = "C:\template\videoZip\ppt\media\media" & j & ".mp4"
            oApp.Namespace(StoreFolder).CopyHere Videoname
            lastCount = oApp.Namespace(StoreFolder).items.count
            If firstCount = lastCount Then
                MsgBox "The video has problems loading and it will not be shown (Only mp4 supported)"
            End If
        Next j

        Set objFSO = CreateObject("Scripting.FileSystemObject")
        objFSO.deletefolder "C:\template\videoZip"
    End If


  



  As I said, with this peace of code I can get all the videos that are in the presentation. Now I want to change the format of them. I heard that it is possible using ffmpeg. Other solutions to change format are welcome too.

  


• avformat/hlsenc : increase initial program date time precision

  18 juillet 2020, par Marton Balint

  avformat/hlsenc : increase initial program date time precision
  Also query time only once, not for every variant stream, otherwise variant
  
  streams might get a slightly different initial program date time. And we can
  
  set this unconditionally because HLS_PROGRAM_DATE_TIME flag is checked
  
  elsewhere.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/hlsenc.c

• ffmpeg -var_stream_map Invalid keyval "v:0

  22 septembre 2020, par rmrf fly

  the ffmpeg command is correct,

  


  use ffmpeg command execute at command line is ok，

  


  int windows10 use java exec the command is ok ,

  


  by only in linux when i use java exec the ffmpeg command throw expection

  


  the command :

  


  ffmpeg -i /data/vsftpd/Anchor.mp4 -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k -map 0:v -map 0:a -map 0:v -map 0:a -f hls -var_stream_map "v:0,a:0 v:1,a:1" -hls_segment_filename 'file_%v_%03d.ts' out_%v.m3u8


  


  enter image description here

  


  [hls @ 0xd31b5c0] Invalid keyval "v:0
[hls @ 0xd31b5c0] Variant stream info update failed with status ffffffea
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument


  


  jar

  


  <dependency>&#xA;   <groupid>org.apache.commons</groupid>&#xA;   <artifactid>commons-exec</artifactid>&#xA;   <version>1.3</version>&#xA;</dependency>&#xA;

  


  java code

  


  public static int exeCommand(String command, OutputStream out) throws ExecuteException, IOException {
    CommandLine commandLine = CommandLine.parse(command);
    PumpStreamHandler pumpStreamHandler = null;
    if (null == out) {
        pumpStreamHandler = new PumpStreamHandler();
    } else {
        pumpStreamHandler = new PumpStreamHandler(out);
    }

    // time out 10s
    ExecuteWatchdog watchdog = new ExecuteWatchdog(10000);

    DefaultExecutor executor = new DefaultExecutor();
    executor.setStreamHandler(pumpStreamHandler);
    //executor.setWatchdog(watchdog);

    return executor.execute(commandLine);
}