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How to Record Losslessly Using x264vfw
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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.
Programs
Another helpful tip
How to Record Your Screen with oCam
First, use the mouse to adjust the green recording frame and set the recording area.
The center drag handle lets you move the recording area with the mouse,
The small squares at each corner can be dragged with the mouse to resize the recording area.
The large rectangular box is the area that will be recorded on the screen.
Once the recording area is set, click the Record button on the oCam main window or press the default hotkey ( F2 ) to start recording. ( The hotkey can be changed in Options. )
When recording starts, the oCam main window changes as shown below.
The Stop button stops recording, Pause pauses the recording, and Capture lets you take a capture even while recording is in progress.
It also shows the remaining time, the size of the file currently being recorded, and the remaining space on the hard disk.
The recording frame also turns red, and when the frame is red, it means recording is in progress.
When you click Stop Recording, the recording ends. To check the recorded video, click the Open button.
Clicking the Open button opens Windows Explorer and selects the recorded file.
The recorded video can be played in a video player,
and it can also be uploaded to sites like YouTube.