How to Trim MP4 with Video Trimmer
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![author avatar](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
26 February 2019 John Weaver Senior Program Developer
Summary
Sometimes, we may want to trim or edit the MP4 files which may get watermark, black bars or too long. However, we may find that the quality of the MP4 files get reduced after these operations. How to trim MP4 files without reducing its quality? Find answer here!
Content
Why is Trimming MP4 Files without Reducing its Quality so Important
Why is Trimming MP4 Files without Reducing its Quality so Important
Being one of the most common video formats, MP4 is widely accepted. Now we can play MP4 files in computer, portable devices like iPhone, iPad, Android devices, Windows phone, car play devices, TVDroid, etc. And videos we can get from the Internet or upload to some website like Facebook, Instagram, Twitter are in MP4 format.
![trim mp4 files](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
To get a better performance of our MP4 videos and to fulfill the requirement of the display devices in a better way, sometimes, we need to trim the videos with video trimmer. However, we may find that the quality of the video will be reduced after edit. Some video editing software will not recode the video after edit. As a result, the audio may not sync with the video frame, low video quality, etc.
How to Trim MP4 Files without Reducing its Quality
If you want to trim video clips without reducing the quality of the MP4 video, it is recommended to trim it with professional MP4 Trimmer- Renee Video Editor, which is equipped with powerful and user-friendly functions.
Trim MP4 Files with Professional MP4 Trimmer
Step 1: Download and install Renee Video Editor. Launch it after install and select “Video Toolbox”.
![Step 1: Select Video Toolbox](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 2: Click “Add Files” or drag the target MP4 files to add it to Renee Video Editor.
![add files in Renee Video Editor Pro](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 3: Click “Cut” function to get into the edit interface.
![select cut function](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 4: Drag the progress bar or set the start and end time. Then the software can cut the target clips from MP4 video for you.
![cut video clips in renee video editor pro](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 5: Click “OK” after cut. Then you will return back to the main interface. Please select MP4 in the output format selection and then click “Start” to output the trimmed video.
![select mp4 as output format](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
How to Remove Black Bar from MP4 Videos
Step 1: Click “Add files” to add the target MP4. Then select “Crop & Rotate” function.
![add files in Renee Video Editor Pro](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 2: Drag the crop area and get the video screen at will. Also, you can set a specific value to get the crop area.
![crop video screen](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 3: You can also rotate and flip the video according to your needs.
![rotate and filp function](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 4: Click “OK” and return to main interface. Please select MP4 in the output format selection and then click “Start” to output the trimmed video.
![select mp4 as output format](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
How to Remove Unwanted Watermark from MP4 Videos
Step 1: Click “Add files” to add the target MP4. Then select “Watermark” function.
![watermark function](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 2: Click “Remove Watermark” button and move the cover area to the target watermark you want to remove.
![remove watermark](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 3: You can also add text, texture even video as watermark to video with Renee Editor Pro.
![add watermark](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 4: Click “OK” and return to main interface. Please select MP4 in the output format selection and then click “Start” to output the trimmed video.
![select mp4 as output format](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
How to Add Filters to MP4 Videos
Step 1: Click “Add files” to add the target MP4. Then select “Effects” function.
![select effects funciton](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 2: You can add different filter effects on your video, zoom in or out designated area and decrease or increase the voice volume of your video.
![add effects to video](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 3: Click “OK” and return to main interface. Please select MP4 in the output format selection and then click “Start” to output the trimmed video.
![select mp4 as output format](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
How to Combine Multiple MP4 Files into One
Step 1: Click “Add files” to add the target MP4s you want to combine.
![add files in Renee Video Editor Pro](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Step 2: Check “Merge all files into one” and select designated output format. Click “Start” to process the merge.
![combine videos into one and output](https://www.reneelab.com/wp-content/themes/dt-the7/images/grey.png)
Besides the following functions we have introduced above, Renee Video Editor Pro can also add subtitle, background music, opening and ending to your MP4 files. If you want to get an excellent MP4 file, download and try Renee Video Editor Pro Now!
Renee Video Editor Pro - Professional Vdieo Edit Software
- Screen Recording - Record screen and webcam in Windows computer.
- Cut Videos - Specify the start and end time in the video to cut a video clip.
- Corp and Rotate Function - Support to crop and rotate the video.
- Effects - Provides filters, zoom in and out and sound effect to users.
- Watermark - Users can add text, image, video watermarks to videos. Also supports to remove watermark from videos.
- Music Function - Add background music to videos. You can create the voice over by yourself or add local music as background music.
- Subtitle Function - Customized your own subtitle.
Download Now
people has downloaded Renee Video Editor Pro and create videos!
When Shall We Recode Video?
We need to recode the video frame and audio after editing the MP4 files. Once the encoder, frame rate or code rate get incorrect, we need to recode them. Only when we cut, merge same video, we can skip the recode process.
For example, if we cut video clips from videos taken by same camera and do not need to add subtitle, watermark or compress the videos, we can merge the cut video clips into one without recoding.
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