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Old 3rd March 2015, 07:40   #1  |  Link
manolito
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Change Speed of Video Clips

Just the other day a friend (who is a musician) asked me how he could change the speed of a clip and save the changes to a new file. He does have a player software which can change playback speed, but he wanted to save the changes.

I did not find any free software which would do this, so I made a small tool for this purpose.

Quote:
ChangeSpeed
----------------------------------------------------------------

Changes the playback speed of input clips and saves the new clip
as a file with AVC video and AAC audio. Supported containers include
MP4 (M4V), MKV, FLV and MOV.


Requirements:
AviSynth (or AVS+) plus a DirectShow decoder and splitter package.
LAV Filters is recommended, but ffdshow plus Haali splitter should also work.

Installation:
Just extract the files from the root folder of the archive into a folder of your choice (DO NOT use a folder which is protected by Windows so it does not have write permission). Extract the files from the "Avisynth Plugins" folder into your AviSynth autoload folder.

Usage:
START.exe [input file(s)]
You can also drag and drop or copy and paste one or several file(s) on the START.bat file.

Advanced:
You can specify advanced options by editing the file "ChangeSpeed.ini".
Everything should be self-explanatory.

Note:
There is no error handling for the INI file. If you enter nonsense
then you will get unpredictable results...
It uses MediaInfo and ffmpeg, AviSynth (or AVS+ 32-bit) and a DirectShow filter package are required.

Maybe it can be useful for some of you folks, get it here:
https://files.videohelp.com/u/172211/ChangeSpeed.zip


Cheers
manolito

Last edited by manolito; 9th February 2021 at 18:57.
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Old 4th March 2015, 02:46   #2  |  Link
manolito
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Updated version with the following changes:

Added support for interlaced sources
The speed change percentage now accepts floating point values

Download link in the first post.


Cheers
manolito
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Old 8th March 2015, 04:17   #3  |  Link
manolito
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New version with the following changes:

Moved the fps conversion for forced output frame rates from ffmpeg to AviSynth
Gives the user the choice between ChangeFPS, ConvertFPS and MotionProtectedFPS


Especially when slowing down a clip MotionProtectedFPS gives a much smoother output than the other methods. For a comparison of the different out_fps modes have a look here:
http://www78.zippyshare.com/v/rAj16Jem/file.html

Download link in the first post of the thread...


Cheers
manolito

Last edited by manolito; 8th March 2015 at 04:40.
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Old 19th May 2015, 14:14   #4  |  Link
manolito
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New version with the following improvements:

Better audio quality by using the Fraunhofer libfdk-aac library
Pitch correction support for 6-ch audio by using Wilbert's TimeStretch plugin
General improvements and bug fixes


Download link in the first post of this thread...


Cheers
manolito
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Old 9th February 2021, 18:53   #5  |  Link
manolito
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Updated version with these improvements:

Now incorporates video resizing
The AVS script and the ffmpeg command line can be viewed and edited before the conversion
Support for file names with special characters
Output file names now contain not only the speed but also other relevant clip properties
Supports AVS+ multithreading


Download link in the first post of this thread

Cheers
manolito

Last edited by manolito; 9th February 2021 at 20:43.
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