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• Handling white spaces in ffmped command

  15 octobre 2015, par Stranger

  I am executing the below ffmpeg command for trimming videos.The issue I am having is that if filepath contains spaces then the command doesn’t work.I saw this answer and tried to add quotes to the filepath but still it doesn’t work. filepath is the path of video from device storage.Since I am fetching many videos i don’t know the exact path.
  Below is the command-

   String addQuotes(String in ) {
  
              return "\"" + in + "\"";
  
          }
  
       execFFmpegBinary("-i " +  addQuotes(filepath)   + " -ss " + startMs / 1000 + " -to " + endMs / 1000 + " -strict -2 -async 1 " + dest.getAbsolutePath());
  
  
  
  
  
  
  
  private void execFFmpegBinary(final String command) {
  
          try {
  
              ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
                  @Override
  
                  public void onFailure(String s) {
  
                      Log.e("Previewragment", "FAILED with output : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onSuccess(String s) {
  
                      Log.e("Previewragment", "SUCCESS with output : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onProgress(String s) {
  
                      Log.e("Previewragment", "Started command : ffmpeg " + command);
  
                      Log.e("Previewragment", "progress : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onStart() {
  
                      Log.e("Previewragment", "Started command : ffmpeg " + command);
  
  
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
  
  
  
  
  
  
                  }
  
              });
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              // do nothing for now
  
          }
  
      }

• FFMPEG command fails for file path with white spaces

  28 septembre 2016, par user3904345

  I am executing the below ffmpeg command for trimming videos.The issue I am having is that if filepath contains spaces then the command fails.I tried many ways to handle spaces but none of them worked except moving file to a path that doesn’t have space and then executing the command with new file path as source.
  Below is the command-

   execFFmpegBinary("-i " +  filepath   + " -ss " + startMs / 1000 + " -to " + endMs / 1000 + " -strict -2 -async 1 " + dest.getAbsolutePath());
  
  
  
  
  
  
  
  private void execFFmpegBinary(final String command) {
  
          try {
  
              ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
                  @Override
  
                  public void onFailure(String s) {
  
                      Log.e("Previewragment", "FAILED with output : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onSuccess(String s) {
  
                      Log.e("Previewragment", "SUCCESS with output : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onProgress(String s) {
  
                      Log.e("Previewragment", "Started command : ffmpeg " + command);
  
                      Log.e("Previewragment", "progress : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onStart() {
  
                      Log.e("Previewragment", "Started command : ffmpeg " + command);
  
  
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
  
  
  
  
  
  
                  }
  
              });
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              // do nothing for now
  
          }
  
      }

  I saw this answer and tried

   String addQuotes(String in ) {
  
          return "\"" + in + "\"";
  
      }
  
  execFFmpegBinary("-i " +  addQuotes(filepath)   + " -ss " + startMs / 1000 + " -to " + endMs / 1000 + " -strict -2 -async 1 " + dest.getAbsolutePath())

   ;

• Converting png images series to webm with transparent white background from Daz3d

  25 août 2015, par James

  I’m trying to make a webm video with a transparent background from a Daz3D model.
  My process is export png image series with transparent background from Daz3D, use ffmpeg to convert png series to webm video.
  This was working well in Daz3D 4.6.

  But in Daz3D 4.8 the exported background is black instead of white, so when converted to webm is ok on Chrome as has the transparency, but on Firefox is black and has a halo (as Firefox does not support transparency so displays background).

  So I’m looking for a solution with Daz3D, or tools like ImageMagik.
  I almost got it with ImageMagik,

  convert -alpha extract *.png mask.png
  
  mogrify -flatten talk*.png
  
  for /f %x in ('dir /s /b blink*.png') do @composite -compose CopyOpacity mask-0.png %x %x

  But for some reason the final webm has a white background not transparent ...
  Some more info here,

  http://www.daz3d.com/forums/discussion/61237/daz3d-4-8-png-background-is-black

  and here,

  http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=28214

  >
  Doh, okay I figured it out. My images were good, but I somehow have two different versions of ffmpeg on my computer and was using the wrong one that doesn’t seem to support transparency.

  Now it is working.

  My only issue is the last shell line,

  for /f %x in (’dir /s /b blink*.png’) do @composite -compose CopyOpacity mask-0.png %x %x

  This only uses mask-0.png, instead of mask-1 for blink01.png, mask-2 for blink02.png etc.