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[Fixed] Can't Join MTS/MP4/M4V Files in Adobe Premiere without Rendering?
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In Adobe Premiere Pro, rendering takes place twice in one project. One is rendering sequences while editing, which enables users to play back materials in real time and at full frame. However, it is the other, rendering while exporting, that troubles many users when joining MTS/MP4/M4V files. They are experiencing extremely slow render times while exporting merged videos of MTS/MP4/M4V. With GPU rendering, it even freezes, and then an error message shows up "Accelerated Renderer Error", "Unable to produce frame". In the process of rendering in Adobe Premiere, what causes freezing or error report? And how to solve it?
Reasons Analysis
Rendering videos slows down videos exporting in Adobe Premiere Pro. But rendering is an indispensable step to output an entire video in it. Here are some possible reasons why rendering retards Premiere Pro operation:
1. MTS/MP4/M4V files eat large space and increase computation burden
MTS file format, short for "MPEG Transport Stream", is designed to play videos of high resolution by associating with AVCHD (Advanced Video Codec High Definition) format. The maximum resolution of MTS files reaches to 1920×1080, the standard of full HD videos. MP4 files can store such media data as audio, video and subtitles. M4V is similar to the MP4 format. It is usually used to store blue-ray videos by its high definition. All of these high-definition files are usually large in size, which increases computation of Adobe Premiere Pro, and thus it is a lengthy process of rendering joined MTS/MPV/M4V videos.
2. Your computer configuration is not qualified.
If your system has not updated to Adobe's recommended requirement, combining videos and rendering them in Premiere Pro is a hard work. You may encounter crashing, lagging, error popping up frequently. So what is the minimum system requirement to run Adobe Premiere Pro? According to its official website, it requires:
- - Windows 10 (64-bit) 1703 or later/ MacOS V10.12 later
- - Intel 7th or newer CPU
- - 16GB RAM
- - 4GB GPU VRAM
- - Fast internal SSD for APP installation and cache
- - 1920x1080 Display resolution
How to join MTS/MP4/M4V files without renderer error? – Preset in Adobe Premiere
1. Cancel GUP acceleration
Step 1. Import MTS/MP4/M4V files into Premiere Pro.
Step 2. File> Project Settings> General> Renderer> Mercury Playback Engine Software Only.
It changes renderer to Mercury Playback Engine Software Only and cancels the GPU acceleration while rendering, but it is at the cost of rendering speed which will slow down export obviously.
2. Change output format
AVI, FLV, H.264 Blu-Ray are high-resolution formats. To make export faster, output formats of lower resolution work better. Follow instructions below to choose output format of lower resolution: File> Export> Media> Format> H.264/MPEG4.
This method does speed up exporting, but the problem is that, what you get after joining MTS/MP4/M4V files are videos of lower resolution. Most people are not satisfied with videos of lower definition, especially when they have high-definition materials.
How to join MTS/MP4/M4V files without quality loss? – Update computer hardware
Join MTS/MP4/M4V files in Adobe Premiere requires higher PC configuration. The system requirement listed in the previous part shows clearly what kind of hardware we need. Let’s get a rough rundown on the recommended CPU, GPU and SSD.
Recommended |
Performance |
Price |
|---|---|---|
| CPU | ||
| Ryzen 7 2700X | 8 cores, 16 threads, processor base frequency 3.7 - 4.3GHZ | $247.87 |
| i7 8700K | 6 cores, 12 threads, processor base frequency 3.7 - 4.7GHZ | $349.99 |
| i9 9900K | 8 cores, 16 threads, processor base frequency 3.6-5GHZ | $484.99 |
| GPU | ||
| GTX 1080Ti | Ram 11 GB, memory bus width 352 bits, memory clock speed 11,000 MHZ | $484.99 |
| RTX 2080 | Ram 8 GB, memory bus width 256 bits, memory clock speed 14,000 MHZ | $717.99 |
| SSD | ||
| Kingston UV400 | 120GB, 550MPs | $27.99 |
| SanDisk Ultra 3D NAND | 512GB, 6GPs | $57.99 |
If your computer is 10+ years old, you’d better buy a whole new device. As is known, this method costs too much. If you don’t have adequate budget for upgrading your computer, let’s skip to the next solution.
If you need a one-click solution to Joining MTS/MP4/M4V Files Quickly: 
Combine Videos without Rendering.Easier & fast Solution
Adobe Premiere Pro renders videos while joining video sequences and exporting videos, and there is no way to stop rendering, just set rendering options. Is there any software else that can join MTS/MP4/M4V files without rendering?
Download and install VideoProc to combine files without rendering in a few clicks!
VideoProc - All-in-one Videos Joiner for HD Files without Rendering
- Join videos of numerous formats, including but not limited to MTS, MP4, and M4V without rendering.
- Export videos without quality degrading.
- A One-click video editor that can cut, trim, crop, denoise, stabilize, etc.
- A Powerful video converter that covers 420+ output formats.
Download VideoProc on Windows 
to join MTS/MP4/M4V files without rendering
Download VideoProc on Mac to join MTS/MP4/M4V files without rendering
Step 1. Launch Videoproc, click Video button, and then import MTS/MP4/M4V files into the program by clicking +Video or dragging files directly to it.
Step 2. Choose output format by clicking Target Format. Format preset based on media types, output devices and webs.
Step 3. Click Hardware Acceleration Engines to speed up exporting.
Step 4. Click merge, and click RUN to export joined files.
Once done, the output file pops up, and then you can check the joined videos.
Side by Side Comparison between VideoProc and Adobe Premiere Pro
Feature |
VideoProc |
Adobe Premiere Pro |
|---|---|---|
| Format | 420+ output formats | Common formats of videos, audios and images |
| Hardware acceleration | Full GUP acceleration | Mercury GPU acceleration |
| Installation Size | 46.6MB | 1.0/1.2GB |
| Ease of use | Easy | Hard |
| Render | No | Yes |
| Real-time preview | Yes | Yes, but after render. |
| Merge videos | Yes | Yes |
| Cut and trim videos | Yes | Yes |
| Add effects to videos | Yes, limited. | Yes, tons of effects. |
Final Words:
Apart from joining videos, it specializes in cutting, trimming, splitting, denoising, stabilizing, add effects, and so on. It is also a converter, capable of convert videos and audios of 400+ formats, a downloader for videos and music from websites, a DVD back-up tool, and a screen recorder. No matter you are a beginner or proficient, VideoProc is doubtlessly a powerful video processor.
That’s all for troubleshooting problems of joining MTS/MP4/M4V file in Premiere Pro without rendering. Go and check out which works best for you.
