How to Record Losslessly Using x264vfw
Before getting started, you must install the x264 codec in advance. If you do not know how to install it, please refer to the Help section.
Click the Codec menu in oCam, then click the External Codec menu item.
Select Use External Codec, choose the x264vfw codec, and then click the Settings button.
Using the default x264vfw settings as a base, change the parts highlighted in the yellow box in the image below as shown.
The following settings need to be changed.
Preset - Ultrafast ( Set this to improve encoding speed. The file size may become larger, but if you choose other options, significant lag may occur. )
Profile - High 4:4:4 ( The default profile may cause quality loss, so change it to High 4:4:4 for lossless encoding. )
Keep input colorspace - Keeps the color space of the internally received input buffer. ( If you use other options, encoding may fail. )
Rate control - Single pass - lossless - Change this for lossless encoding.
Click the OK button to apply the settings.
When recording 64-bit games, the settings are applied to x264vfw64 for 64-bit, so run x264vfw - Configure x264vfw64 from the Start menu and configure it in the same way as shown above.
If you record with the above settings, the video will be recorded losslessly. One important point is that if you want to play back the lossless video without quality loss, you must change the settings in your video player.
Below is how to check a lossless video using PotPlayer.
Run PotPlayer, then click Preferences ( F5 ).
In the Preferences window,
click Video - Color Space/Attributes on the left, then in the Color Space group box on the right, select Convert manually if possible - Default output color space. ( If you do not configure this, even if the recording is lossless, the screen colors may still be altered during playback. )
Click OK, then play the video recorded losslessly.
At this point, press Ctrl + F1 in PotPlayer. As shown below, the output format of the video codec must be displayed as RGB(32 Bits).
Also, in the playback information under the File Information tab, the following properties must match as shown below.
Format profile : High 4:4:4 Predictive@L3
Color space : RGB
Color range : Full
Matrix coefficients : RGB
Please note that Windows Media Player does not play this properly, and preview thumbnails will not be displayed in Windows Explorer.
Today's News/Tips
The System Becomes Sluggish During Recording
When recording with oCam, if the mouse moves slowly or the entire system feels sluggish, you need to adjust the settings to resolve the issue. Below is a detailed explanation of how to reduce the problem and lower the system load.
1. Click the 'Settings' button in the oCam main window.
2. When the Settings window opens, go to the 'Encoding' tab in the menu on the left.
3. In the 'Encoding' tab, check the 'Frames Per Second (FPS)' setting. The default value is likely set to 30.
4. Gradually lower the FPS value while testing system performance. For example, start at 30 and reduce it step by step to 25, 20, 15, and 10.
5. At each step, start recording and check whether the mouse movement or system sluggishness improves.
6. After finding the optimal FPS value for your PC specifications, click the 'OK' button to save the settings.
Lowering the FPS may reduce video smoothness, but it can also reduce system resource usage and improve slowdown during recording. It is important to experimentally find the FPS value that best suits your PC specifications (CPU, GPU, RAM, etc.). After changing the setting, make a test recording to find the best balance.
