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• Batch execute (ffmpeg) command on multiple sets of images at once [Novice]

  23 septembre 2021, par Ethan Kendrick

  I'm relatively new to navigating Python libraries, Windows batch processing, and coding as a whole. Here is my situation :

  


  I have multiple folders each with n images in them, where n is a number divisible by 7.
In each folder, the images are in sets of 7, grouped by their name. If one set of these images was named "apple", I would have the following seven images with the following naming structure :

  


  Apple.0_aspect-gigapixel-art-scale-4_00x.png,
Apple.1_aspect-gigapixel-art-scale-4_00x.png,
Apple.2_aspect-gigapixel-art-scale-4_00x.png,
Apple.3_aspect-gigapixel-art-scale-4_00x.png,
Apple.4_aspect-gigapixel-art-scale-4_00x.png,
Apple.5_aspect-gigapixel-art-scale-4_00x.png
Apple_aspect-gigapixel-art-scale-4_00x.png
(Please note that that order matters, the numberless file should be the last, but if the files are sorted by alphabetical/date, that should already be the case.)

  


  For each one of these sets of images inside of one of the folders, I am using ffmpeg to make a video file with the guidelines outlined in this post. On that post I received great help from the user Gyan, who gave me this command : ffmpeg -framerate 10 -i %d.png -vf "split=2[head][loop];[head]trim=end_frame=4[head];[loop]trim=start_frame=3,setpts=PTS-STARTPTS,loop=6:4:0,shuffleframes=1 2 3 2[tail];[head][tail]concat=n=2:v=1:a=0" out.mp4. I am wanting to batch execute this command in each of my folders of images, having it create a video file for each one of the groups of 7.

  


  TLDR ; How can I batch execute a ffmpeg command (above) on multiple sets of images at once ?

  


  Thank you all so much. I very much appreciate the help I've received so far.

  


• Convert m3u8 File URL to a GIF File [closed]

  30 juin 2023, par nxsi

  I have a m3u8 File URL that I got using the MusicKit API (Apple Music) which is an animated cover art for an album. (A quick side question on that. Is m3u8 the only format that Apple Music returns for animated cover arts ?)

  


  So, Now that I have that m3u8 file URL, I want to convert it to a GIF for the ease of use of GIFs.
I've tried using ffmpeg but I don't really seem to make it work at all with NodeJS.

  


  Here is a sample File URL of what Apple Music returns (https://mvod.itunes.apple.com/itunes-assets/HLSMusic116/v4/cb/ac/9e/cbac9e42-0c8a-9798-0016-52ce447cdc78/P359486356_default.m3u8)

  


  TLDR ;
1- Is m3u8 the only format of animated cover arts that the MusicKit api returns ?
2- Can I convert that m3u8 file URL to a GIF, If so, How ?
3- Are there any other ways than ffmpeg to use in NodeJS ?

  


  I've tried using ffmpeg and the furthest I got was a GIF that was corrupted and not done correctly.
Here is the command I tried :

  


  ffmpeg -i "https://mvod.itunes.apple.com/itunes-assets/HLSMusic116/v4/cb/ac/9e/cbac9e42-0c8a-9798-0016-52ce447cdc78/P359486356_default.m3u8" -vf "fps=10,scale=320:-1:flags=lanczos" output.gif


  


• Lego Mindstorms RSO Format

  14 juillet 2010, par Multimedia Mike — General

  I recently read a magazine article about Lego Mindstorms. Naturally, the item that caught my eye was the mention of a bit of Lego software that converts various audio file formats to a custom format called RSO that can be downloaded into a Mindstorms project to make the creation output audio. To read different sources, one might be left with the impression that there is something super-duper top secret proprietary about the format. Such impressions do not hold up under casual analysis of a sample file.

  A Google search for "filetype:rso" yielded a few pre-made sample that I have mirrored into the samples archive. The format appears to be an 8-byte header followed by unsigned, 8-bit PCM. More on the wiki. If FFmpeg could gain an RSO file muxer, that would presumably be a heroic feat to the Lego hacking community.