Version 20.02.17 is now available for DOWNLOAD!
Most people’s video preview area only occupies a fraction of their screen.
Meanwhile, the app is struggling to process effects in realtime while editing a 1080p or higher video. So, it makes sense to change the processing resolution while editing to roughly the same as the preview window. For example, for many people, the video preview typically only occupies 1/9 of their 1080p screen. Thus, you can edit at 640x360 instead of 1920x1080 to give the app and computer less work.
This is now available in the Settings under Preview Scaling. If you are using a larger or high DPI screen or editing higher resolution, you might want to edit at a higher resolution, and Shotcut also offers options for 540p and 720p in addition to 360p for the preview vertical resolution.
Please remember that today there is still a processing cost to scale down the source video to the preview resolution. So, this is still not a silver-bullet, magical cure-all for performance issues. This feature will be more beneficial when low resolution proxies are used, which is planned for version 20.04 in April.
Also, please understand that preview scaling is a step further away from WYSIWYG and does not provide perfect fidelity and full precision. Some differences are unavoidable especially where blur, softness, and noise are concerned.
In addition, some filters do not support preview scaling and will process at full project resolution:
Lastly, a Use preview scaling checkbox has been added to Export > Advanced > Video. This is intended to provide a faster export for draft review. You should leave the export resolution set to the project resolution unless your preset or video codec dictates a resolution.
Ever since we made it possible to change the speed of a clip, people have wanted a way to keep the audio at roughly the same pitch instead of going lower or higher. Also, sometimes people want to use a pitch effect for comical reasons or to disguise a voice. We are happy to announce a new Pitch audio filter. This has a speed compensation parameter so that you can copy the speed value from Properties into the filter. In the next version, we will directly integrate a pitch compensation option in the Properties panel. Please consider that this really only works with decent quality in the 4.0x - 0.25x speed range.
Frequently, people ask for more transitions. Well, how about 150+!? After you create a transition by overlapping clips on the same track, select the transition and look in Properties > Video. There has always been a Custom… option where you can upload a gray scale still image, and our Resources page provides a list of resources where to get them. In this version you can now use a grayscale video clip, which some call a “matte transition.” Forum user @jonray has put together a nice collection of these, also on the Resource page.
Please be aware that these transitions do not automatically adjust their duration. If you do not make the transition long enough, it will likely be abrupt at the end. If you make it longer, however, there is no problem. You can also use these to make multi-track transitions by adding the Mask: From File video filter to the clip on a higher video track.
lengthproperty in MLT XML as a time value independent of frame rate.