This tool converts F4V to OPUS completely free and without any functional limitations. Since it is based on the browser API, the processing speed is the fastest because all files are processed locally on your device and are not uploaded to our server.
Batch Convert F4V to OPUS Online
With this convertor, you can easily convert multiple F4V files to OPUS format directly in your browser — completely free. You can also customize the video resolution (width and height) during the conversion.
To access advanced settings, click the Options button in the top right corner. There, you can set the output size for your OPUS files.
Additional Settings:
Video Size: Set the width and height for the output OPUS file.
Encoding Speed:Controls how fast the video is encoded. Faster speeds may result in larger file sizes.
Video Bitrate:Set between 1–10,000 Kbps to control the video quality and file size.
Frame Rate:Defines the video’s FPS (frames per second). Higher frame rates produce larger files.
Audio Bitrate:Recommended range is 16–320 Kbps.
Cut Video: Trim the video using a start and end time in HH:MM:SS format.
For example, setting 00:00:05 to 00:00:08 will cut a 3-second clip from the video or animation.
Before converting, you can choose a folder on your device where the converted OPUS files will be saved. Each F4V file will be automatically saved to your selected folder after it's successfully converted — no manual downloads needed.
Save All: Once all F4V files are converted, click
Save All to instantly save all OPUS files to your selected folder.
About F4V files
F4V is a video format based on the H.264/MPEG-4 AVC standard, developed by Adobe for Flash-based video streaming. It is commonly used for online videos, especially those embedded in websites via Flash Player. F4V supports high-quality video and audio compression, making it efficient for streaming. However, with the decline of Flash, F4V has become less popular, and modern browsers now favor MP4 or HTML5 formats instead. It remains compatible with some media players and Flash-based applications.
About OPUS files
Opus is a versatile, open-source audio codec developed by the IETF, combining the strengths of both speech and music compression. It delivers high-quality sound at very low bitrates, making it ideal for VoIP, streaming, and real-time communication. Opus excels in dynamic bitrate adjustment and works well across a wide range of applications, from low-latency gaming chats to high-fidelity music streaming. Supported by most modern browsers, devices, and platforms, it has become a key format for internet audio.
