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• How to show a watermark for 3 second on a MP4 using FFmpeg

  6 février 2014, par b1izzard

  I need to add a 3-second watermark to a Camera recorded video in Android. I'm using FFmpeg static build to execute the commands.

  Approach I

  I had tried the below command using latest version of FFmpeg(version N-60108-gda25a65) in my Desktop running Linux Mint, the command works fine.

  ffmpeg -y -itsoffset 3 -i input.mp4 -i myImage.jpg -filter_complex "[0:v][1:v]overlay=0:0:enable=between(t\,0\,3)"  -codec:a copy output.mp4

  In Android I'm using the FFmpegv1.2 with below config to execute the command.

   *******Starting FFMPEG
  
      ***ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers***
  
      ***  built on Mar 31 2013 23:44:57 with gcc 4.6 (GCC) 20120106 (prerelease)***
  
      ***  configuration: --arch=arm --target-os=linux --enable-runtime-cpudetect --enable-pic --disable-shared --enable-static --cross-prefix=/opt/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --sysroot=/opt/android-ndk-r8e/platforms/android-8/arch-arm --extra-cflags='-march=armv6' --extra-ldflags= --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network***
  
      ***  libavutil      52. 18.100 / 52. 18.100***
  
      ***  libavcodec     54. 92.100 / 54. 92.100***
  
      ***  libavformat    54. 63.104 / 54. 63.104***
  
      ***  libavdevice    54.  3.103 / 54.  3.103***
  
      ***  libavfilter     3. 42.103 /  3. 42.103***
  
      ***  libswscale      2.  2.100 /  2.  2.100***
  
      ***  libswresample   0. 17.102 /  0. 17.102***

  Java Code to run the FFmpeg command :

  String[] ffmpegCommandToAddWatermark = { 
  
              mFfmpegInstallPath, "-y", "-itsoffset","3",
  
               "-i", INPUT_VIDEO_PATH, "-i", WATERMARK_IMAGE_PATH,
  
               "-filter_complex","[0:v][1:v]overlay=0:0:between(t\\,0\\,3)",
  
               "-strict","-2",
  
               "-codec:a","copy",OUTPUT_VIDEO_PATH};          
  
          try {
  
          Process ffmpegProcess = new ProcessBuilder(ffmpegCommandToAddWatermark)
  
              .redirectErrorStream(true).start();
  
  
  
          String line;
  
  
  
          BufferedReader reader = new BufferedReader(
  
              new InputStreamReader(ffmpegProcess.getInputStream()));
  
          Log.d(TAG, "*******Starting FFMPEG");
  
          while ((line = reader.readLine()) != null ) {
  
  
  
              Log.d(TAG, "***" + line + "***");
  
          }
  
          Log.d(null, "****ending FFMPEG****");
  
  
  
          } catch (Exception e) {
  
          e.printStackTrace();
  
          }

  The command execution failed with following error :

  ***[overlay @ 0x271f770] No option name near 'between(t,0,3)'***
  
  ***[AVFilterGraph @ 0x2711530] Error initializing filter 'overlay' with args '0:0:between(t,0,3)'***
  
  ***Error configuring filters.***

  The same command executes successfully when :enable=between(t\,0\,3) is removed, but the resulting output video has the watermark throughout the timeline, but I need watermark only for the starting 3 seconds.

  Approach II :

  I tried to convert WaterMarkImage to WaterMarkVideo

  ffmpeg -y -loop 1 -r 30 -i WaterMarkImage.jpg -b:v "4096k" -vf "scale=640:480" -t 3 WaterMarkVideo.mp4

  And then merge the WaterMarkVideo.mp4+CameraRecordedVideo.mp4 using the concat command :

  ffmpeg -y -f concat -i inputs.txt -c copy output.mp4

  The resulting output is corrupt due to BitRate,FrameRate,etc., mismatch. Any idea to solve the problem ?.

• subtitles dont show ffmpeg issue

  30 septembre 2016, par Bilal Shahid

  I’m using below command to burn subtitles to a video. I have successfully done it via terminal in ubuntu. I’ve used this library in android android library and I’ve run the same command to do the same task but it wont work the command executes successfully but in result video I don’t see any subtitle.

  fmpeg -i /home/s9iper1/a.mp4 -vf "subtitles=/home/s9iper1/titles.srt:force_style='Fontsize=24,PrimaryColour=&H0000ff&'" -c:a copy /home/s9iper1/out.mp4

• Show the correct settings for —preset slow in —fullhelp

  1er décembre 2016, par Henrik Gramner

  Show the correct settings for —preset slow in —fullhelp
  The slow preset was recently adjusted but we forgot to update the
  
  corresponding —fullhelp message to reflect the change.
  

  • [DH] x264.c