Overlaying Transparent PNG Image on Video Using FFmpeg and NVENC

Overlying Transparent PNG Image on Video using FFmpeg and NVENC

In this article, we will discuss how to overlay a transparent PNG image on a video using FFmpeg and NVENC. We will cover the key concepts, command-line options, and filtering process, and provide step-by-step instructions to achieve this task.

Introduction

FFmpeg is a free and open-source software project consisting of a vast software suite of libraries and programs for handling video, audio, and other multimedia files and streams. NVENC is a hardware-based video encoder by NVIDIA, which provides high-performance video encoding on NVIDIA GPUs.

Overlaying a Transparent PNG Image on a Video

To overlay a transparent PNG image on a video using FFmpeg and NVENC, you can use the following command-line options:

Here is a breakdown of the command-line options used:

• -y overwrite output files without asking
• -vsync 0 disable video synchronization
• -hwaccel cuda use CUDA as the hardware acceleration library
• -hwaccel\_output\_format cuda set the hardware acceleration output format to CUDA
• -i input.avi specify the input video file
• -i watermark.png specify the input watermark file
• [0]hwdownload,format=nv12[downloaded\_v] download the input video frame and convert it to nv12 format
• [downloaded\_v][1]overlay=main\_w-overlay\_w-10:main\_h-overlay\_h-10:enable='between(t,start\_time,end\_time)'. overlay the watermark image on the video frame with the specified position and enable it only between the start\_time and end\_time
• -c:v h264\_nvenc set the output video codec to H264_NVENC
• -preset slow set the encoding preset to slow
• -b:v 5M set the video bitrate to 5Mbps
• output.mp4 specify the output video file

In this article, we have discussed how to overlay a transparent PNG image on a video using FFmpeg and NVENC. By using the appropriate filter\_complex options, we can achieve this task with ease. We hope this article has provided you with a better understanding of the key concepts involved and inspired you to explore more possibilities with FFmpeg and NVENC.

References

• FFmpeg Documentation
• NVIDIA Video Codec SDK