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• movenc : Add an option for resilient, hybrid fragmented/non-fragmented muxing

  1er novembre 2014, par Martin Storsjö

  movenc : Add an option for resilient, hybrid fragmented/non-fragmented muxing
  This allows ending up with a normal, non-fragmented file when
  
  the file is finished, while keeping the file readable if writing
  
  is aborted abruptly at any point. (Normally when writing a
  
  mov/mp4 file, the unfinished file is completely useless unless it
  
  is finished properly.)
  This results in a file where the mdat atom contains (and hides)
  
  all the moof atoms that were part of the fragmented file structure
  
  initially.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/movenc.c
  • [DH] libavformat/movenc.h
  • [DH] libavformat/version.h
  • [DH] tests/fate/lavf-container.mak
  • [DH] tests/ref/lavf/mov_hybrid_frag

• FFMPEG syntax clarification question for the "between" function [closed]

  31 octobre 2024, par user2571504

  I've been using a crop filter script to hold the crop in one place for the first 750 frames, then automate a moving crop to follow some action in the clip. It's working great for chunky moves (5 pixel jumps as shown below) :

  


  -filter_script:v:0 crop-filter-script.txt

crop='1500:1000:100:
if(between(n,0,750),100,
if(between(n,751,756),105,
if(between(n,757,762),110,
if(between(n,763,768),115,
if(between(n,769,774),120,
if(between(n,775,780),125,
if(between(n,781,786),130,etc


  


  My question is about how "between" is interpreted. Does "between(n,751,756)" mean "frames 751, 752, 753, 754, 755 & 756" ? or does it exclude the start and ending frames, so that it's "between" those two numbers ? Like : 752, 753, 754 & 755 only ?

  


  Thanks !

  


• Why can’t I run the ffmpeg executable stored in /mnt/sdcard ?

  18 novembre 2024, par user2193172

  I managed to compile the ffmpeg Static build. But when I am trying to call the ffmpeg command line I get a Java IOException : No such file or Directory.

  



  My code is as follows :

  



  public void merge_video(View view){

    if(ffmpeg_file.exists()){
          Log.d(null, "ffmpeg exists");
      }else{
          Log.d(null, "Could not locate ffmpeg in the folder");
      }

      File file1 = new File("/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4");
      if(file1.exists()){
          Log.d(null,"File 1 exists");
      }
      File file2 = new File("/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4");
      if(file2.exists()){
          Log.d(null,"File 2 exists");
      }

      String[] ffmpegCommand = new String[5];
      ffmpegCommand[0] = "/mnt/sdcard/com.ffmpeg_test/ffmpeg";
      ffmpegCommand[1] = "-i";
      ffmpegCommand[2] = "concat:/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4|/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4";
      ffmpegCommand[3] = "copy";
      ffmpegCommand[4] = "/mnt/sdcard/com.ffmpeg_test/output.mp4";  

      try {
          Process ffmpegProcess = new ProcessBuilder(ffmpegCommand).redirectErrorStream(true).start();

          String line;
          BufferedReader reader = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));
          Log.d(null, "*******Starting FFMPEG");

          while((line = reader.readLine())!=null){

              Log.d(null, "***"+line+"***"); 
          }
          Log.d(null,"****ending FFMPEG****");

    } catch (IOException e) {
        e.printStackTrace();
    }
  }


  



  The LogCat print is as follows :

  



  03-27 20:41:10.522: W/System.err(24709): java.io.IOException: Error running exec(). Command: [/mnt/sdcard/com.ffmpeg_test/ffmpeg, -i, concat:/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4|/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4, copy, /mnt/sdcard/com.ffmpeg_test/output.mp4] Working Directory: null Environment: [ANDROID_SOCKET_zygote=13, TMPDIR=/data/local/tmp, ANDROID_BOOTLOGO=1, EXTERNAL_STORAGE=/mnt/sdcard, ANDROID_ASSETS=/system/app, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ASEC_MOUNTPOINT=/mnt/asec, LOOP_MOUNTPOINT=/mnt/obb, BOOTCLASSPATH=/system/framework/core.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/core-junit.jar, USBHOST_STORAGE=/mnt/sdcard/usbStorage, ANDROID_DATA=/data, LD_LIBRARY_PATH=/vendor/lib:/system/lib, ANDROID_ROOT=/system, ANDROID_PROPERTY_WORKSPACE=12,32768, EXTERNAL_STORAGE2=/mnt/sdcard/external_sd]
03-27 20:41:10.522: W/System.err(24709):    at java.lang.ProcessManager.exec(ProcessManager.java:224)
03-27 20:41:10.522: W/System.err(24709):    at java.lang.ProcessBuilder.start(ProcessBuilder.java:202)
03-27 20:41:10.522: W/System.err(24709):    at com.example.ffmpeg_test.MainActivity.merge_video(MainActivity.java:106)
03-27 20:41:10.522: W/System.err(24709):    at java.lang.reflect.Method.invokeNative(Native Method)
03-27 20:41:10.522: W/System.err(24709):    at java.lang.reflect.Method.invoke(Method.java:507)
03-27 20:41:10.527: W/System.err(24709):    at android.view.View$1.onClick(View.java:2149)
03-27 20:41:10.527: W/System.err(24709):    at android.view.View.performClick(View.java:2538)
03-27 20:41:10.527: W/System.err(24709):    at android.view.View$PerformClick.run(View.java:9152)
03-27 20:41:10.527: W/System.err(24709):    at android.os.Handler.handleCallback(Handler.java:587)
03-27 20:41:10.527: W/System.err(24709):    at android.os.Handler.dispatchMessage(Handler.java:92)
03-27 20:41:10.527: W/System.err(24709):    at android.os.Looper.loop(Looper.java:123)
03-27 20:41:10.527: W/System.err(24709):    at android.app.ActivityThread.main(ActivityThread.java:3691)
03-27 20:41:10.527: W/System.err(24709):    at java.lang.reflect.Method.invokeNative(Native Method)
03-27 20:41:10.527: W/System.err(24709):    at java.lang.reflect.Method.invoke(Method.java:507)
03-27 20:41:10.532: W/System.err(24709):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
03-27 20:41:10.532: W/System.err(24709):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
03-27 20:41:10.537: W/System.err(24709):    at dalvik.system.NativeStart.main(Native Method)
03-27 20:41:10.537: W/System.err(24709): Caused by: java.io.IOException: No such file or directory
03-27 20:41:10.537: W/System.err(24709):    at java.lang.ProcessManager.exec(Native Method)
03-27 20:41:10.537: W/System.err(24709):    at java.lang.ProcessManager.exec(ProcessManager.java:222)
03-27 20:41:10.537: W/System.err(24709):    ... 16 more
03-27 20:41:36.057: W/KeyCharacterMap(24709): No keyboard for id 0
03-27 20:41:36.057: W/KeyCharacterMap(24709): Using default keymap: /system/usr/keychars/qwerty.kcm.bin