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• ffmpeg `-movflags use_metadata_tags` won't copy album cover metadata

  20 mai 2023, par Ali Ent

  I want to edit a mp3 file using ffmpeg while keeping the metadata. I've searched how to keep the metadata and found this link. It is said to use -movflags use_metadata_tags.

  


  ffmpeg -i input.mp3 -movflags use_metadata_tags -af "volume=0:enable='between(t,0,0.2)'" out.mp3


  


  It copies every metadata except album cover.

  


  I found another link. It is said to use -c:v copy for album cover. I tried :

  


  ffmpeg -i input.mp3 -movflags use_metadata_tags -c:v copy -af "volume=0:enable='between(t,0,0.2)'" out.mp3


  


  But it didn't work.

  


  I even tried this link. It is about how to copy metadata from one file to another. and it didn't work too.

  


  How should I keep the album cover ?

  


• OSError : MoviePy error : failed to read the duration of file

  3 août 2022, par ZackR

  I'm receiving the error below from a lambda deployment with a Python3.9 runtime environment and x86_64 architecture. I attempted using the both most recent ffmpeg binary snapshot snapshot and release from this link, [https://evermeet.cx/ffmpeg/][1].
I checked the file info for duration and the attribute exists with a value of 16 seconds.

  


  What am I missing here ??

  


  [ERROR] OSError: MoviePy error: failed to read the duration of file /tmp/lgnd-assets-public-drops---sample-video.mp4.
Here are the file infos returned by ffmpeg:

-i: /var/task/ffmpeg: cannot execute binary file

Traceback (most recent call last):
  File "/var/task/CreateThumbnail.py", line 99, in handler
    create_video_thumbnail(bucket, key, file_name, extension)
  File "/var/task/CreateThumbnail.py", line 72, in create_video_thumbnail
    resize_video(thumb_download_path, thumb_upload_path)
  File "/var/task/CreateThumbnail.py", line 30, in resize_video
    with VideoFileClip(video_path) as video:
  File "/var/task/moviepy/video/io/VideoFileClip.py", line 88, in __init__
    self.reader = FFMPEG_VideoReader(filename, pix_fmt=pix_fmt,
  File "/var/task/moviepy/video/io/ffmpeg_reader.py", line 35, in __init__
    infos = ffmpeg_parse_infos(filename, print_infos, check_duration,
  File "/var/task/moviepy/video/io/ffmpeg_reader.py", line 296, in ffmpeg_parse_infos
    raise IOError(("MoviePy error: failed to read the duration of file %s.\n"


  


  Thanks,
Zack

  


• Use FFMPEG to stream images from one client to another through IIS (or other) server

  20 avril 2012, par eselk

  I'm new to FFMPEG and maybe I should post this in their forums, but you guys here seem to know everything, so here goes. I have a client app that takes screen shots and saves them as images (256 color bitmaps currently, can change if needed), it does this at a rate of about 4 fps. I currently use my own socket code written in C# to push these to my socket server (also C#) running on a Windows 2008 server. That server then sends these images out to several clients that display them as they are received and also buffers them to allow for rewind, pause, etc, like a DVR. My current format requires approx 100KB per frame, and thus only works for a very small number of clients.

  I started looking at FFMPEG and the compression with MPEG1 and especially MPEG4 is amazing, and so is the quality. What I'm looking for is a basic guide, tutorial, or steps, to produce something similar to my current design, but using FFMPEG and actual video streaming. Ideally the player side could be something like Flash or anything that is easy to embed in a .NET WinForm (or a browser control I can host in the WinForm), and it would need to support buffering still so they can pause and rewind (about 5 or 10 mins, which seems like a lot, but remember this is only 4 fps and 256 color, about 1 or 2 MB per min in my testing).

  I see that FFMPEG, the command-line utility, and I assume the API, even has options for posting to a server via UDP or TCP, so maybe I'll use that instead of my own socket code. Ideally my app would feed images to FFMPEG library at a rate of 4fps as they come from the screen-shot unit, and it would send these up to my IIS server (or another server ?) which would then server them to client(s) that could use them similar to a YouTube video.