jeanslack/Videomass v6.1.18 on GitHub

Changelog

Fixed ValueError: could not convert string to float: in long_processing_task.py using latest FFmpeg versions.
Fixed enabling "Batch rename files" on switch_file_import method.
[TIMELINE] Fixed a bug in file import where the overall duration in the timeline would get stuck at 23.59.59.999.
[TIMELINE] Fixed the overall duration to 00:00:00.000 if no files were imported or selected. In these cases, the timeline controls will now be disabled.
Fixed bug when playing files with path names containing more than one space.
[FILE LIST] Fixed UnboundLocalError: by LEFT clicking on "Size" column headers using the latest FFmpeg versions (which changed unit names e.g. Mibyte to Mbyte etc.).

[AV/CONVERSIONS] Added the ability to set more parameters for subtitle streams, such as subtitle codec and map indexing.
[AV/CONVERSIONS] Added button to display the raw command dialog.
[TIMELINE] Added ability to display waveform (resolve #140 feature request).
[TIMELINE] Added a convenient playback feature to the timeline with some additions like a progress meter/cursor (only available for Linux/FreeBSD/MacOS for now)

[AV/CONVERSIONS] Added 16 more indexing selections for audio and subtitles.
[AV/CONVERSIONS] Removed OGV format from drop list because obsolete.
[AV/CONVERSIONS] Added subtitle stream item in Batch Mode summary dialog for user confirmation.
Updated command line and man page.
Improved tool tips for stream indexing controls.
Updated File_Catalog.txt .
Some code improvements and refactoring.
Using ffplay, the draw timestamp font size dependent on height of the video.
[TIMELINE] Improved GUI layout and usability.
[FROM VIDEO TO PICTURES] Removed the fifo filter for GIF creation because it was removed from recent versions of FFmpeg (it also seems unnecessary).
[STILL IMAGE MAKER] Iproved usability setting the images time interval.
Update Italian language (thanks to @bovirus and @jeanslack).
Update Russian language (thanks to ChourS)