Based on our record, MKVToolnix seems to be a lot more popular than Visual Watermark. While we know about 185 links to MKVToolnix, we've tracked only 1 mention of Visual Watermark. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Fourth, try remuxing one of the problem files. Use the Multiplexer section of MKVToolNix. This will copy the contents to a new MKV file. It is like putting a letter in a new envelope when the original is damaged, but the pages inside are OK. Source: 5 months ago
If the audio tracks are displayed as unknown, the language flag needs to be set. Use tools such as MKVToolNix Header Editor to configure the language for audio & subtitle tracks. Source: 10 months ago
As for extracting tracks from MKVs, the low-level way would be to use ffmpeg directly (something like ffmpeg -i video.mkv -map 0:s:0 subtitle.sup would extract the first subtitle stream to a .sup file, the extension used for standalone PGS subtitles), but something like MKVToolNix can probably do it as well. That won't help you too much on its own though, since you now just have an external image-based subtitle... Source: 10 months ago
You could use a tool outside of Plex (like MKVToolNix) to combine the video+audio of one version with the audio+subtitles of the other. It gets trickier, or at least more tedious, if the videos aren't exactly the same, since you'd then have to account for any audio/subtitle shifting. Source: 10 months ago
Option 3: Change to MKV container. Use MKVToolNix or similar tools and remux to a MKV container. Note that this may cause problems with Dolby Vision. LG TVs must have Dolby Vision in a MP4 container, otherwise the video will not play correctly. Probably affects other Plex clients as well. Source: 10 months ago
There are sights like visualwatermark.com or makewatermark.com or if you want to do it on your phone you can just google free watermark apps... Or you could google how to watermark your photos for free :). Source: over 2 years ago
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
Watermark.ink - Online Photo Watermarker
MKVCleaver - MKVcleaver is a GUI (Graphical User Interface) for mkvtoolnix, designed to extract data from MKV...
textmark - Protect your content with an invisible, trackable watermark.
tsMuxeR - tsMuxeR update for 3D blu-ray (HD) DVD & Blu-ray authoring
AG Audio Watermark Generator - AG Audio Watermark generator is a little app for both mac and pc that will help you to add an audio watermark to your original track in a fast & easy.