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• Moviepy Making a CompositeVideoClip of two concatenate_videoclips

  16 avril 2018, par Max Better

  Working with the Moviepy lib and I’ve been beating my head off a wall with this last step for a while.

  GifClips = concatenate_videoclips(TheGIFs, method='compose')
  
  TextClips = concatenate_videoclips(TheTexts, method='compose')

  I’ve written both of these to separate files and they look fine. But I’m having a problem getting them to combine properly.

  I’m trying :

  FinishedClips = CompositeVideoClip([GifClips, TextClips], size=(1920,1080))

  It has the audio from TextClips and shows the GifClips but the text isn’t visible. It did show when written alone without the composite.

  It does work if I combine GifClips with a single TextClip but this doesn’t work when I need text clips to run one after another.

  I could run a CompositeVideoClip with every single TextClip and a part of the GifClips and then concatenate them all together but that doesn’t seem like the neatest way of doing this. My guess is there’s a fairly obvious argument here somewhere but looking through the docs and examples I’m struggling so far.

  Any suggestions on how I could get the TextClips clip to show up properly in a composite would be much appreciated.

• In Android, how can I display mp4 files captured by Android itself without having "sorry this video cannot be played" trouble ?

  31 octobre 2013, par fercis

  I am new in Android and have an application as follows :

  1) I record videos by my phone (Samsung Galaxy Note 2).
  2) I send video files (mp4) to a cloud (Dropbox in my example) without any change in encoding. And store the URL of the sent video on the cloud.

  And when the application is in view video mode,
  3) I want to view the videos with the URL (which may be captured by other client Applications) in videoview.

  I cannot view the videos that are captured by the phone itself. There are many discussions in SO about the encoding compatibility (H 263, H 264 etc.).

  Video recoding with ffmpeg

  However, I could not manage to find a way to CHANGE the encoding of the video to be recorded by the application. Camera.Parameters class has the encoding information only for pictures. The quality is not important, I only want to capture videos which can be directly played in the same Android application without any change.

• How to build ffmpeg executable binary for Android ?

  22 février 2016, par Én Xinh Lung Linh

  I’m struggling how to build an executable binary of ffmpeg for Android command.
  I am very new to ffmpeg which I need to extract audio from video files such as mp4.

  I followed a tutorial here to build ffmpeg binary : http://www.roman10.net/how-to-build-ffmpeg-for-android/

  I dont need *.so file to use in NDK but only an executable binary.

  I tried to enable : --enable-ffmpeg in shell script build. It yielded a ffmpeg file too. Especially, the file size is small with around 2M. However, I am unable to use it in android execution as following :

  p = Runtime.getRuntime().exec("/data/data/example/ffmpeg -i /sdcard/test.mp4  -vn -acodec copy /sdcard/test.aac");

  The above executed very quickly and of course it didn’t give any result.

  I continued searching and found an example here : https://github.com/guardianproject/android-ffmpeg-java

  The ffmpeg binary in the project is nice, I can run some command with desired output. However, some conversions to mp3 format gets failed because probably it lacked libmp3lame when building. Specially, ffmpeg is heavier than mine quite much, it is about 15M. I don’t know how they build the binayr.

  I’m looking for is a proper guide which I can build with arbitrary options such as libmp3lame, libshine. I get stuck at m4a to mp3 conversion.

  Everybody who has experience in ffmpeg, please guide me. Thank you !