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• FFmpeg concat with absolute path

  23 septembre 2016, par Vadim Korzun

  I try to concatenate two videos using ffmpeg I use that wrapper : wrapper.
  According docs I use this commands :

  ffmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
  
  ffmpeg -i input2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
  
  ffmpeg -i concat:"intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output.mp4

  After two command I got two files :

  /storage/emulated/0/recorder/test1_convert.ts /storage/emulated/0/recorder/test2_convert.ts

  But when I execute the third command I got failure : log message : concat:"/storage/emulated/0/recorder/test1_convert.ts|/storage/emulated/0/recorder/test2_convert.ts": No such file or directory

  I suppose something wrong with syntax absolute path. This is full my third command :

  

• How can I reset the path of FFMPEG in the VideoExport library in Processing ?

  11 avril 2021, par bella

  Note : This question was originally titled "How can I reset the path of FFMPEG in Java ?" but, as it has been pointed out in the comments and the answer, the issue is not with Java, so I've changed the title to make it easier to find for others with the same issue.

  


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  I accidentally set the path for FFMPEG to a different folder, and I can't change it back.

  


  I'm using Processing (the library and its IDE) and the user-created Video Export library to capture and write to an mp4 video file. The library required FFMPEG, so I downloaded and installed it. After I installed it, I ran the code, and the library called Java to request the path of FFMPEG. I wrongly set the path to a different folder (which I eventually deleted), and immediately realized my mistake. I ran the code again to see if I could trigger the prompt again to correct the path.

  


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  The console response I received was : (I'm sure most of it doesn't have to do with the actual issue. However, I wanted to show all of it in case it somehow does.)

  


  


  Oct 24, 2016 10:23:25 PM java.util.prefs.WindowsPreferences 
WARNING : Could not open/create prefs root node Software\JavaSoft\Prefs
at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
java.io.IOException : Cannot run program
"C :...\Processing\Octree_Graphics\data\FFMPEG\ff-prompt.bat" :
CreateProcess error=2, The system cannot find the file specified at
java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) at
com.hamoid.VideoExport.startFfmpeg(Unknown Source) at
com.hamoid.VideoExport.initialize(Unknown Source) at
com.hamoid.VideoExport.saveFrame(Unknown Source) at
Octree_Graphics.draw(Octree_Graphics.java:90) at
processing.core.PApplet.handleDraw(PApplet.java:2399) at
processing.opengl.PSurfaceJOGL$DrawListener.display(PSurfaceJOGL.java:731)
at
jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:692)
at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:674)
at
jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:443)
at
jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1293)
at
jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1147)
at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:759) at
com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:81)
at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:452)
at
com.jogamp.opengl.util.FPSAnimator$MainTask.run(FPSAnimator.java:178)
at java.util.TimerThread.mainLoop(Timer.java:555) at
java.util.TimerThread.run(Timer.java:505) Caused by :
java.io.IOException : CreateProcess error=2, The system cannot find the
file specified at java.lang.ProcessImpl.create(Native Method) at
java.lang.ProcessImpl.(ProcessImpl.java:386) at
java.lang.ProcessImpl.start(ProcessImpl.java:137) at
java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) ... 17 more
VideoExport error : Ffmpeg failed. Study
C :...\Processing\Octree_Graphics\basic.mp4.txt for more details.

  


  


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  I need to find a way to reset the path of FFMPEG that Java has. I have tried uninstalling and reinstalling the library, but I haven't tried Java (I don't want to mess with anything it has in its current state).

  


• vulkan : take refs of frames using the regular buffer ref path

  1er mars, par Lynne

  vulkan : take refs of frames using the regular buffer ref path
  This simplifies the code, reduces allocations, and critically, does
  
  not store references of frames, along with references to hw_frames_ctx.
  
  The issue was that storing refs to frames while transferring stored
  
  refs to hw_frames_ctx of frames, and so created a circular dependency,
  
  which caused the Vulkan device to never be terminated.
  This only stores what it strictly needs as a dependency, and enables
  
  the frames context to be freed, even while doing asynchronous transfers.
  

  • [DH] libavutil/vulkan.c