Efficiently Encode FFmpeg Gameplay Footage Without Quality Loss

Here's a detailed response to your question about re-encoding a video file recorded in a near-lossless format using OBS.

Title: Re-encoding a Video File Recorded in a Near-Lossless Format Using OBS

Introduction

You're currently recording gameplay footage using OBS in a near-lossless format, which preserves the quality nicely but generates gigabytes of video. If you want to re-encode the video file for distribution, this guide will help you.

Step 1: Install FFmpeg

FFmpeg is a free and open-source tool that can handle video encoding, decoding, transcoding, and streaming. To install FFmpeg, follow the instructions for your operating system:

• Windows: Download the appropriate installer from the FFmpeg download page and follow the installation wizard.
• macOS: Install FFmpeg using Homebrew: brew install ffmpeg.
• Linux: Most modern Linux distributions include FFmpeg by default. If not, you can install it using your package manager (e.g., apt-get install ffmpeg on Ubuntu).

Step 2: Open Command Prompt (Windows) or Terminal (macOS/Linux)

Navigate to the directory containing the video file you want to re-encode.

Step 3: Re-encode the Video File

Use the following command to re-encode the video file:

ffmpeg -i input_file.format output_file.mp4 -codec:v libx264 -crf 23 -preset slow

Replace input_file.format with the name and format of your original video file (e.g., gameplay.flv). Replace output_file.mp4 with the desired name and format for the re-encoded video file (e.g., reencoded_gameplay.mp4).

The -codec:v libx264 option specifies the video codec to use for the re-encoded file (H.264 in this case). The -crf and -preset options control the trade-off between file size and quality. In this example, a CRF value of 23 and the slow preset are used to achieve a good balance between quality and file size.

Step 4: Monitor the Progress

The FFmpeg command will start processing the video file. Monitor the progress in the Command Prompt or Terminal window. When the re-encoding is complete, the output file will be generated in the same directory as the input file.

Conclusion

Re-encoding a video file can help reduce its size while maintaining acceptable quality. With FFmpeg, you can easily re-encode your OBS recordings for distribution.

References

• FFmpeg
• FFmpeg Documentation