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• left to right slide animation in ffmpeg [duplicate]

  5 janvier 2018, par Anuj TBE

  This question is an exact duplicate of :

  • Problems building Image slideshow with sliding transition using ffmpeg
    
    1 answer
    

  I am working on FFmpeg script to generate a slideshow of images and videos.

  I have figured out the script for fade out effect.

  But I want to slide image from one direction to other over another image. ie., from left-right or top-bottom

  I’m struggling to get some help in this but only examples available are for fade-in and fade-out effect.

  How can I slide image over other from one direction to another in FFmpeg ?

• librosa can't load wav file in aws lambda docker

  30 novembre 2022, par Luka Savic

  I have an AWS Lambda function created using Docker.
I have librosa installed, ffmpeg installed using the solution from this question : install ffmpeg on amazon ecr linux python

  


  I checked in a Lambda function with os.system("ffmpeg -version") and I managed to get valid output, stating different versions and parts of ffmpeg.

  


  Problem is that when I do librosa.load(wav_file) it gives the following error :

  


  /your/path/.venv/lib/python3.9/site-packages/librosa/util/decorators.py:88: UserWarning: PySoundFile failed. Trying audioread instead.
  return f(*args, **kwargs) 


  


  From what I've read, librosa should natively support .wav files, even without ffmpeg, and even though I have ffmpeg installed, it doesn't work.

  


  One more information, .wav file was downloaded, player, and loaded with librosa on my local PC without any problems. I tried also on different wav and mp3 files, and the problems were still there.

  


• Reading from an audio CD in Java

  30 novembre 2019, par Macmanmatty

  Hello I’m Finishing up my java music player that is also a portfolio project and I wondered how I can read from an audio CD in java. The java file class can read the file data and send it to ffmpeg via opencv for java and then write to the source data line for playing , unless the user skips songs too fast or tries to seek them. Then the song refuses to play (due to buffer under runs I believe ; it throws ffmpeg frame grabber execeptions) and it just keeps skipping tracks. File input stream was slightly better but it faced other problems and still had seeking problems. My latest idea was to cache the file on to the hard disk and then play it. But not one of the four file copy methods I tried, Java Copy File – Stream, Java Copy File – java.nio.channels.FileChannel, Java Copy File – Apache Commons IO FileUtils, Java Copy File – Files class was able to copy 100% of the file 100% of the time. They mostly transferred about 50-60% of it and then quit. So how does one read from a CD in java ? I’m running OSX 10.12 and all of the audio files appear up as AIFF files . I would like to be able to have this work for all major desktop platforms (OSX Windows, Linux) though.