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• Split video in specific number of frame with ffmpeg in c#

  1er août 2017, par Loic Bch

  I want to split a video into a specific number of image :
  I’m using ffmpeg/EmguCV in C#.

  I capture a video from a webcam and i need to split the video into 59 images. i’m using -i command with ffmpeg to split my video into a number of images.

  The problem is that the number of images i get at the end is different at each capture because the duration of the video is not exactly the same due to fps drop.

  So if anyone know if it’s possible to specify that i want the video to be equally cut into 59 images. (Or any other idea to get what i want)

  (at the moment i’m taking the number of images i get from the cut and divide it by 59 then i’m taking one image in "the result" but i’ts not precise at all because if i get a decimal number im losing or adding images)

• How to split an incoming stream into multiple streams with different resolutions ?

  30 janvier, par Cobalt

  How to split an incoming stream into several streams with different resolutions on the MediaMTX server ? There is one incoming stream in rtsp, it needs to be split into several channels with different resolutions. I think in the direction of ffmpeg, but I don't understand how to register this in the mediamtx settings.

  


• split videos with ffmpeg

  23 novembre 2020, par 5Diraptor

  I'm trying to create a script that scans a directory, and for all videos larger then X size, splits them down into smaller chunks.

  


  There are two similar questions :

  


  

  • Using ffmpeg to split video files by size

  


  • Split into equal parts and convert many mp4 videos using ffmpeg

  


  


  Neither of these work in the way I want. The first you have to manually input every file that you want to process. The second doesn't check for filesize, or output the files in the way I want.

  


  So far, this is the contents of the .bat file :

  


  %~d1&#xA;&#xA;for %%a in (*.MOV) do (&#xA;&#xA;if %%~za GTR 2000000000 (&#xA;&#xA;REM usage %%a <filename>&#xA;set "_filename=%~n1"&#xA;set "_tally=.SPLIT-%03d"&#xA;set "_extension=%~x1"&#xA;&#xA;set "_outputname=%_filename%%_tally%%_extension%"&#xA;&#xA;&#xA;    ffmpeg -i "%%a" ^&#xA;        -crf 0 -c copy -map 0 -segment_time 00:00:30 -f segment -reset_timestamps 1 ^&#xA;        %_outputname%&#xA;)&#xA;)&#xA;pause&#xA;</filename>

  


  My aim is for the script to work in the following way :

  


  

  1. Drag a video (from a folder of videos) onto the .bat file.

  


  2. Script opens up, and targets each file ending .MOV, and is greater then 2GB

  


  3. ffmpeg splits the video down into >2GB chunks. (I know it's currently split down in 30 second chunks, still working on understanding how to use the -fs parameter).

  


  4. Each chunk gets saved with the original filename and extension, but the filename is suffixed with ".SPLIT" and then a unique number that relates to which file it is - first file is 000 and second is 001 etc.

  


  


  Problems :

  


  

  • Firstly, I want to split by filesize and not time, but I don't understand how to use the -fs parameter in this case. I guess I could use something like ffprobe -i input.file -show_format -v quiet | sed -n 's/duration=//p' in conjunction with it but I'm not confident...

  


  • Secondly, I'm getting a problem with %03d in the .bat. Think I'm mixing up languages ? It retrieves the filepath of the .bat file instead of counting number of loops.

  


  


  Any help really appreciated !