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• Concatenate 2 or more gif files with ffmpeg android

  24 décembre 2017, par Chathu_sm

  Well, I have spent a great deal of time to find a way of combine gif files using ffmpeg library.But none of them seems to work for me.

  What I have tried (I have used ffmpeg android java library) :

      String gif1=Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)+"/gif1.gif";
  
      String gif2=Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)+"/gif2.gif";
  
  
  
      String commandStr="-i concat:"+gif1+"|"+gif2+" -c copy "+file.getAbsolutePath()+"/output.gif";
  
  
  
      String[]command=commandStr.split(" ");
  
          ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
  
  
              @Override
  
              public void onStart() {}
  
  
  
              @Override
  
              public void onProgress(String message) {
  
               //   Toast.makeText(Main.this,"Progress: "+message,Toast.LENGTH_SHORT).show();
  
                  Log.e("Progress TAG: ",message);
  
              }
  
  
  
              @Override
  
              public void onFailure(String message) {
  
                  Toast.makeText(Main.this,"Failed: "+message,Toast.LENGTH_SHORT).show();
  
                  Log.e("Failure TAG: ",message);
  
              }
  
  
  
              @Override
  
              public void onSuccess(String message)
  
              {
  
                  Toast.makeText(Main.this,"Success: "+message,Toast.LENGTH_SHORT).show();
  
                  Log.e("Success TAG: ",message);
  
              }
  
  
  
              @Override
  
              public void onFinish() {}
  
          });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
          // Handle if FFmpeg is already running
  
      }

  But above command gives an error like this.

  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
                                                                            built with gcc 4.8 (GCC)
  
                                                                            configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
                                                                            libavutil      55. 17.103 / 55. 17.103
  
                                                                            libavcodec     57. 24.102 / 57. 24.102
  
                                                                            libavformat    57. 25.100 / 57. 25.100
  
                                                                            libavdevice    57.  0.101 / 57.  0.101
  
                                                                            libavfilter     6. 31.100 /  6. 31.100
  
                                                                            libswscale      4.  0.100 /  4.  0.100
  
                                                                            libswresample   2.  0.101 /  2.  0.101
  
                                                                            libpostproc    54.  0.100 / 54.  0.100
  
                                                                          Input #0, gif, from 'concat:/storage/emulated/0/Pictures/gif1.gif|/storage/emulated/0/Pictures/gif2.gif':
  
                                                                            Duration: N/A, bitrate: N/A
  
                                                                              Stream #0:0: Video: gif, bgra, 500x500, 1.70 fps, 10 tbr, 100 tbn, 100 tbc
  
                                                                          Assertion video_enc->pix_fmt == AV_PIX_FMT_PAL8 failed at libavformat/gif.c:130

  Can anyone please suggest me an efficient command to do this.

  P.S : I have a dynamic file list so can’t use the demuxing method which uses a text file.

• FFMpeg concatenation with large list of inputs — how to minimize command line length

  27 août 2020, par huitlacoche

  I have a python tool that concatentates several mp4s together into a single movie file using FFMPEG run from a subprocess call. The issue is that an arbitrarily large number of inputs in the command string will hit the windows CLI character max.

  


  ffmpeg -y -i a.mp4 -i b.mp4 -i c.mp4 -f lavfi -t 0.1 -i anullsrc  -filter_complex '[0]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2: (oh- ih)/2,setsar=1[0:v];[1]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(owiw)/2:(oh-ih)/2,setsar=1[1:v];[2]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow- iw)/2:(oh-ih)/2,setsar=1[2:v]; [0:v][3:a][1:v][3:a][2:v][3:a]concat=n=3:v=1:a=1[v][a]' -c:v libx264 -map [v] -map [a] output.mp4

  


  Assuming 3 input movies that may or may have audio (hence the null audio source).
This works fine assuming there are no more than 30-50 input files. Often the input files have rather long filepaths and can get long very quickly.

  


  After doing a bit of reading I tried a simple :

  


  ffmpeg -f concat -i files.txt -c copy output.mp4

  


  Which works if I can guarantee that all the files are the same codec/resolution/etc, but this cannot be guaranteed.
I'm not clear on how to translate my filter_complex to work with a text file of inputs. Finding a specific enough solution has proven elusive.

  


  I'd be perfectly fine assigning the input paths to a temporary environment variable but in my use case this doesn't seem to work either. The subprocess call doesn't seem to translate wildcard %MYVAR% calls to environment variables.

  


  I feel like there has to be an answer to this problem. If anyone can suggest a solution I would greatly appreciate it.

  


  Thanks !

  


• moviepy mp4 to mp3 converter

  18 mai 2023, par Enspist

  I am trying to use python to convert files from mp4 to mp3. After some research most places recommend moviepy. I used the command pip install moviepy and it seemed to go off without a hitch. I go to VS Code and enter what a youtube video told me to enter (I know its not recommended to do that, I just wanted to see if it would work). This is what I have

  


  #This code should convert a .mp4 file into a .mp3 file

#This imports the moviepy package
from moviepy.editor import *

#here are the names of my files (I have subbed out actual files names)
mp4_file = "file_name.mp4"

mp3_file = "file_name.mp3

#Here is the the audio being stripped from the .mp4 file
video_clip = VideoFileClip(mp4_file)
audio_clip = video_clip.audio

#this is writing the audio to a .mp3 file at the path that is specified.
audio_clip.write_audiofile(mp3_file)

#this closes the conversion code
audio_clip.close()
VideoClip.close()


  


  After running the code I get this error :

  


  RuntimeError: No ffmpeg exe could be found. Install ffmpeg on your system, or set the IMAGEIO_FFMPEG_EXE environment variable.


  


  There is a bunch of gibberish above it but that is the final line that gets spit out.

  


  After looking up what the issue is I tried to input :

  


  from moviepy.config import change_settings
change_settings({"FFMPEG_BINARY": "/usr/bin/ffmpeg"})


  


  And it also did not work. I have tried searching for where ffmpeg is and it is not in /usr/bin/ffmepg or /usr/local/bin/ffmpeg like most sources I have looked at tell me it should be.

  


  I have tried installing ffmpeg on its own by doing pip install ffmpeg and 'brew install ffmpeg'. Both of those go off without a hitch as well but the error still pops.

  


  I am using a macbook air m1 and I have I think everything I need installed already so I am so lost on what is causing this error to pop.

  


  Can someone please help ?

  


  I have tried installing ffmpeg on its own as well as searching for the file directly.

  


  I should expect to get the .py file to run fine.

  


  I instead get the error seen above :

  


  RuntimeError: No ffmpeg exe could be found. Install ffmpeg on your system, or set the IMAGEIO_FFMPEG_EXE environment variable.