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• 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.

• How to sync two videos of different length

  26 août 2020, par Huhngut

  I got two video files. The first one has good resolution but the wrong language and the second one has bad resolution but the wished language. Both of the files got a few seconds of black screen at the beginning but these seconds are different. I got a lot of these files and the intro seems to be always of a different length so I can't say always remove 2 seconds of audio and 3 seconds of video and then merge them.

  


  So I am wondering if there's some tool out there which s able to sync these files automatically.

  


  But it won't be enough to simply search for two identical images and calculate the time distance because the resolution is different (might its possible to scale the better one down for comparison) but even in this case, the program has to evaluate if the image has enough detail for comparison so it won't compare 2 black images. It would be good if the program scales the images to 50x50 to save time while comparing

  


  Does someone know any tool or has suggestions might even some python/java code for developing one. Any search suggestions or name ideas

  


• FFMPEG concat video and audios with certain start point for each

  6 août 2022, par Jybrcfn CA

  I have some video files without voice and some audios and all of them are in .flv format. I want to combine them as a single file in way that each video or audio start at given start_time. the start_times are in way that no two videos or two audios overlap but there might be a distance between end of a video/audio and start of the next video/audio. Is there any way to do it using FFMPEG ?

  


  for example :

  


  





  


  


  


  


  



  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  file	start_time(milliseconds)
  audio1	400
  audio2	1400
  audio3	3100
  video1	0
  video2	1000
  video3	2000
  video4	3700

  


  


  audio -> *

  


  video -> +

  


  emty -> -

  


  final result should be some thing like

  


  ---*******---**************---**********************--

  


  +++++++--+++++++---++++++++++++++---++++++++++++++++++

  


  Thank you in advance.