Using external codecs - using x264.
Using an external codec - Using x264
oCam supports external codecs (VFW), and here we will learn how to use the x264 codec.
You can download the x264 codec from the site below.
http://sourceforge.net/projects/x264vfw/
Go to the site and click the download button.

Download starts automatically.
For the installation screen, you can just click Next.
Agree to the license agreement.
Specify the installation path.
Installation is complete.
Click Finish.
After installing the codec, you must restart oCam to see it in the external codec list.
After restarting oCam, click the Codec button on the main oCam window and click the External Codec menu.

Check the Use External Codec box.

In the list, select x264vfw - H264/MPEG-4 AVC codec.

Then click the Settings button to view detailed codec settings.

A codec settings window opens as shown below. Since this is not normal video encoding but real-time screen recording, select Ultrafast in Preset and check the Zero Latency box to make encoding as fast as possible, then click OK.
(This setting is useful for real-time recording, and you can adjust it as appropriate for your situation.)
After setting it this way and starting recording, it will be recorded using the x264 codec.

If you record like this, the recording is done using x264 codec.
* For game recording, if the game you want to record is 64-bit, you must also install the 64-bit version of x264vfw (by default, unless you touch the option during x264vfw installation), x264vfw-Configure x264vfw64 from the Start menu. Run it and set it up as described above.
* Keep / Accept only YUV 4: 2: 0, Keep / Accept only YUV 4: 2: 2, Keep / Accept only YUV 4: 4: 4 are not supported for x264vfw setting and recording will fail when using this setting.
Today's News/Tips
How to Resize the Recording Area in oCam

The main screen of oCam includes various buttons designed for intuitive use of its features, and among them, the "Resize" button is one of the key functions for customizing the recording area. When you click this button, a clean and user-friendly pop-up menu appears. This menu provides a variety of options for flexibly adjusting the size and resolution of the recording area, making it easy for everyone from beginners to IT professionals to configure settings that best fit their working environment.

When the pop-up menu opens, the sizes shown represent the resolution of the recording area, and clicking a menu item immediately adjusts the recording area to the selected resolution. For example, if you choose a standard resolution such as 1920x1080 (Full HD) or 1280x720 (HD) under the YouTube category, the oCam recording frame will be set to that size and recording will proceed at the exact resolution. oCam supports resolutions up to 4K (3840x2160) by default, making high-resolution content creation possible. In particular, when using the MPEG-4 codec, it supports resolutions up to 8K (7680x4320). This is especially useful for professionals who need high-quality video production, such as recording high-resolution gameplay footage or performing professional video editing work.
The pop-up menu also includes a "Full Screen" menu item. Clicking this option automatically sets the recording area to cover the entire monitor screen. If you press the Record button in this state, the whole screen will be recorded, which is especially useful when capturing the entire desktop, presentations, or full-screen gameplay. Full Screen mode is the best choice when you want to record all on-screen content easily without setting a separate area.

Another powerful feature is the "Find Recording Target Window" menu item. When you click this option, the window under the mouse pointer is highlighted with a red rectangular box. If you move the mouse over the window you want and click it, that window area is automatically set as the recording area. This feature is very useful when you want to record or capture only a specific window, such as an application or browser window. For example, when creating software tutorials or recording the workflow of a specific program, you can capture only the necessary window cleanly without unnecessary background, greatly improving work efficiency.

Finally, the "Custom Size" menu item is an option that allows users to control the size of the recording area more precisely. Clicking this menu opens a separate input window, where users can directly enter the horizontal and vertical pixel values of the desired resolution to set the recording area. This feature is especially useful when a non-standard resolution or a custom size is needed for a specific project. For example, it can be used when you need to match the resolution requirements of a video for upload to a social media platform or record at a size optimized for a specific device.
With these various options, oCam's resize feature makes it possible to set the recording area flexibly and precisely according to the user's needs. The ability to set the desired resolution and area with just a few clicks clearly shows oCam's intuitive design and efficiency. In addition, you can further optimize your workflow by adjusting the save path, file naming rules, or detailed codec settings in the Settings menu. If you want high-quality video or need to capture a specific window, we recommend actively using oCam's resize feature to get the results you want with ease.