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• Trying to identify global metadata

  29 mai 2021, par the_steve_randolph

  I am pretty new to ffmpeg and using it to convert/change a large number of video files. I typically use VLC to find out some (all ?) of the information that I am interested in changing. But, one piece of information I can't seem to identify.

  


  I know that within a video file, each audio and video track have titles that I can change with ffmpeg. Also, I know that I can change the metadata tag "title" that would seem to encompass the entire file. This "title" value is displayed on the top line in VLC and displays in Windows Explorer in the "Title" column. This seems to be the same tag when you right-click on the file, click the "Details" tab, and, look at the "Title" tag under "Description".

  


  But, in some video files, in VLC I click on "Playback" and then "Title", there is different "title" information. Most of the time it is blank, but, other times there is one or two names that indicates it came from the "title" information of a DVD. That is, a DVD that has multiple titles (different/separate movies on the same disc). Well, I want to erase or change that "title" information, but, I cannot seem to determine where/how in ffmpeg to access it. This information is not shown with the "ffmpeg -i file.mp4" or "ffprobe -1 file.mp4".

  


  Since this "title" information is not directly related to a specific video track, I am assuming that it fits under the category of "global" metadata. Googling "ffmpeg global metadata tags", I can find some of the tags I typically change (i.e "frame height" and "frame width"), as well as the "title" that is the Windows Explorer "title" column. But, none of those search results mention this other "title" information/tag, or, that a DVD can have multiple titles that show up when converted to a MP4/MKV and viewed it in VLC.

  


  So, WTH is that tag name and is it something that ffmpeg can see and/or change ?

  


• how to create a video from images with different time interval ? [duplicate]

  30 mars 2018, par Imran

  This question already has an answer here :

  • FFMPEG - concat demuxer with duration filter issue
    
    1 answer
    
  • Using FFmpeg to join images with different timly distance
    
    2 answers
    

  I have set of image in local storage. ex : img000,img001,img002....img044
  I want, when img0014 then time interval 600millisecond and when imag030 then time interval 600millisecond and when imag044 then time interval 600millisecond
  When I Use This Commend then create video without time interval
  String[] cmd2="-r", "50", "-i", "/storage/emulated/0/Movies/pic/img%03d.jpg", "-c:v", "libx264", "-vf", "fps=25", "-pix_fmt", "yuv420p", video.mp4 ;

  please Help Me

• Why does my ffmpeg command fails from python subprocess ? [closed]

  23 mars 2024, par haggi krey

  I want to concat two movies with ffmpeg. In the shell I can execute this :
\\programs\2d\ffmpeg\inst\ffmpeg.bat -y -i "concat:C:/daten/movieA.ts1|C:/daten/movieB.ts2" -c copy -bsf:a aac_adtstoasc C:/daten/movieConcat.mov and it works fine. If I try to call it from a python subprocess :

  


  import subprocess
cmd = [r"\\programs\2d\ffmpeg\inst\ffmpeg.bat", "-i", '"concat:C:/daten/movieA.ts1|C:/daten/movieB.ts2"', "-c", "copy", "-bsf:a aac_adtstoasc", "C:/daten/movieConcat.mov"]
result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
if result.returncode > 0:
    print("create concat failed")
print(result.stdout)
print(result.stderr)


  


  I get this error :

  


  Trailing option(s) found in the command: may be ignored.
[in#0 @ 00000222c056a1c0] Error opening input: Invalid argument
Error opening input file "concat:C:/daten/movieA.ts1|C:/daten/movieB.ts2".
Error opening input files: Invalid argument


  


  I have no idea what's wrong with my call and I'd appreciate any hints.