However, few of them can crop MP4 video without error as MP4 is not an editing-friendly format which may contain high-compressed codecs like HEVC and VP9. Note: There are countless video croppers and software that comes with cropping features. Advanced video editing software: Avidemux, Davinci Resolve.Multi-media players with MP4 cropping features: VLC media player.Professional MP4 Cropper: VideoProc Converter.Generally, there are 4 types of software you can utilize to crop an MP4 video: Cropping those clips is the easiest way to remove unnecessary content and the resulting MP4 clips are very possibly smaller and have new aspect ratios. In addition, despite all the care and attention we put into recording our videos, there are bound to be black bars, strangers, and other unneeded objects. If instead you decide to use the arrows to move the start point you could land on a frame that is not a key frame, resulting in the impossibility to save.Why we crop MP4? Be it Facebook videos, Instagram Stories, Twitter posts, or IGTV, they all display the uploading MP4 video in their preferred aspect ratio. Dragging the start point on the slider as described above will do this for you.

mp4 format the starting point has to be a key frame. Note that in order to be able to save the trimmed file in. That's all you have to do, when you save the file it will be trimmed. You can then move the playing head to where you want the end point to be and click on the button marked 'B' :

When you are at the right starting point click on the symbol with an 'A' as part of it just below of the centre of the playing head line: When you do this you will see the video fastfoward as you drag the button. To do this click on the rectangle shaped slider at the bottom of the window :ĭrag it to the new in point or starting point you wish to define.

If needed you can trim the video file using Avidemux before you save it.

Trim video avidemux