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• Scale and overlay in single command

  10 juin 2020, par Hasan Yilmaz

  I want to convert and resize a video and put a logo on it. I am doing this with 2 different command line like this.

  



  Command 1 :

  



  D:\Logo\ffmpeg -i "D:\Logo\video.mxf" -vf scale=1280:720 "D:\Logo\video.mxf_fullHDtoHD.mp4"


  



  Command 2 :

  



  D:\Logo\ffmpeg -i "D:\Logo\video.mxf_fullHDtoHD.mp4" -i D:\Logo\logo_720p.png -filter_complex "[0:v][1:v] overlay=60:50"  "D:\Logo\output_720p_with_logo.mp4"


  



  Can I do this in just one command ?

  


• using ffmpeg -f ffmetadata to get metadata for a stream [on hold]

  23 avril 2014, par user645402

  I have a stream that I can get the metadata for using ffmpeg :

  ffmpeg -i <stream url="url"> -f ffmetadata -
  
  </stream>

  This works great for the first song, but then returns. The issue is that the stream is from a radio station which plays song after song - i.e. the metadata is changing as time goes on. However, this command will only give metadata for the song currently playing and then exit.

  I would like it to keep flowing the metadata as it updates in the stream.

• Static image and a folder of mp3's ?

  28 juin 2013, par Shirohige

  I want to create a bunch of videos consisting of an single image which is shown throughout the whole video but each video has a different audio file. I can do it manually with various tools but the problem is that I have a lot of audio files and I can't optimize the frame rate (more on that later) and it takes a lot of time to do it that way but ffmpeg offers everything I need but the problem is that I don't know how to batch process everything.

  The basic code :
  ffmpeg -i song-name.mp3 -loop 1 -i cover.jpg -r frame-rate -t song-length -acodec copy output.mp4

  What I want to achieve :
  Let's say that I have a folder which consists of several audio files : song-name-1.mp3, song-name-2.mp3, ..., song-name-n.mp3 and cover.jpg.

  I need a batch file which takes the name of every mp3 file in a folder (a FOR loop I suppose) and processes it with the same command :
  ffmpeg -i song-name.mp3 -loop 1 -i cover.jpg -r frame-rate -t song-length -acodec copy output.mp4

  So the image is always the same for every video. The song length can be taken with the tool mp3info and the corresponding command :
  mp3info.exe -p %S song-name.mp3

  Since I only have one image throughout the whole video, the optimal frame rate would be the inverse of the video length which is 1/length (where length is a variable in seconds which we get from mp3info).

  So the final code should look something like this :
  ffmpeg -i song-name.mp3 -loop 1 -i cover.jpg -r 1/length -t length -acodec copy song-name.mp4

  Where "song-name" is a variable which changes for every iteration of the FOR loop (i.e. for every audio file in the folder) and length is a variable whose value we get with the command :
  mp3info.exe -p %S song-name.mp3

  I found examples of a FOR loop to fetch all file names of all mp3's in a specific folder but I do not know how to integrate mp3info. I hope that somebody can help me and I have some knowledge of the C programming language if that can be used in any way.