MKVShrink settings explained:




MKV Shrink Presets:



While most people have their own preferences, we included a couple of presets that automatically set the majority of quality and format options.

If you upgrade to MKVShrink GT, you will receive a large collection (1000+) of additional profiles, specifically optimized for devices such as iPad, iPhone, Nook, Kindle and more.


MKV Shrink Video settings:

The settings here are what will be used for modifying the video quality and resolution of the content you process with MKV Shrink.
The video portion is usually the part of a video file that takes up the largest amount of space of the file-size, so in order to make your video files smaller, this is where you can gain the most.
* Quality.
This controls the visual quality of the video portion. 2 different modes (for AVC modes only), bitrate and CRF.
Bitrate mode uses a fixed bitrate for the entire video. For low-power devices (Roku), or for streaming over your network or over the internet, this would be the best option to ensure a consistent video playback.
CRF uses a fixed visual quality for the entire video, and adjusts itself depending on whatever is needed to achieve that. For faster scenes, it will use a higher bitrate, and for slower scenes, a lower. For file-size considerations, CRF usually results in a better quality video at a smaller file-size.
* Resolution:
Video in its simplest form is nothing more than a sequence of images, and just like an image, the file-size is tied directly to the size of the picture. Higher quality images have more pixels, and space is needed for each pixel to determine its quality.
By reducing the resolution from 1080p (1920x1080) to 720p (1280x720), the amount of pixels is reduced by more than half, which effectively reduces the file-size for the video portion by half as well.
And with a good player, despite reducing the size in half, the visual difference is minimal.
1080p screenshot taken with VLC fullscreen
720p screenshot taken with VLC fullscreen
(only available with the MKVShrink GT upgrade)
While the impact on file-size is minimal, removing black padding found on many videos can greatly enhance the viewing experience of your videos. Not only does it shave off a few MB's from the file-size, it also enables good video players to scale/zoom your videos properly.
The crop-setting in MKV Shrink GT only removes black borders if the video actually has them. It does not remove any part of the actual video portion.
Aside from the above, changing the compression format (codec) used for the video can also make a difference. Even transcoding the video to the same format but with different internal settings can result in a considerably smaller size without sacrificing quality.
MKV Shrink Audio settings:
This lets you keep multi-channel audio, or switch the audio from surround to stereo in order to save more space or for compatibility with tablets/smartphones.
Fixed bitrate option for quality, which is shared between all the channels. For Surround, use at least 448.
Different codecs that can be used to keep the original audio or transcode it to something your equipment/player supports or to reduce the size.
MKV Shrink Output settings:
Gives you the option to use the original filename of the video, or to append important video information such as resolution and video/audio formats to the file-name.
Output format:
Dropdown containing a variety of different output file-types.
Folder location for MKV Shrink to store the created video files.
Test mode:
Runs the process for 5 minutes on each item, making it easy to test/compare setting-changes and quality results.
Previews the video while the shrink-process is running.