The GH5 is a popular mirrorless camera that offers impressive 4K recording capabilities, including the ability to shoot in HLG (Hybrid Log-Gamma) mode. HLG is a high dynamic range (HDR) format that can capture more details in bright and dark areas of the image, providing more realistic and vibrant colors. However, when it comes to editing HLG footage and applying LUTs (lookup tables), there is a debate on whether to convert the footage to Rec709 or keep it in HLG 10-bit format. In this article, we will discuss the pros and cons of both approaches.
The Advantages of Keeping HLG 10-bit Footage
One of the primary benefits of keeping HLG 10-bit footage is that it maintains the full dynamic range of the image. This means that you can edit the footage without losing any of the highlights or shadows. Additionally, if you plan to distribute the footage in HDR format, keeping it in HLG ensures that the content will be compatible with HDR displays. You can apply LUTs directly to HLG footage, which simplifies the editing process and saves time.
Another advantage of keeping HLG 10-bit footage is that it allows for greater flexibility in post-production. You can adjust the exposure, contrast, and color grading with more precision, resulting in a more natural and cinematic look. HLG footage also has less noise and banding than Rec709, making it a better option for color grading.
The Disadvantages of Keeping HLG 10-bit Footage
The main disadvantage of keeping HLG 10-bit footage is that it may not be suitable for all viewing platforms. Most displays are calibrated for Rec709, which means that HLG footage may appear too dark or too bright. Some viewers may not have HDR displays, which means that they will not be able to see the full range of the footage. Additionally, HLG footage may be too demanding for some editing software, which may cause performance issues or require more powerful hardware.
Applying LUTs to HLG Footage
Applying LUTs to HLG footage can be a great way to achieve a particular look or style quickly. However, it’s important to note that not all LUTs are compatible with HLG footage. Some LUTs are designed specifically for Rec709 or SDR (Standard Dynamic Range) footage, which means that they may not work as expected with HLG. It’s essential to use LUTs that are specifically designed for HLG, or you can create your own LUTs that are optimized for your particular footage.
Conclusion
There are pros and cons to both editing HLG footage without converting to Rec709 and applying LUTs directly to HLG footage. The decision ultimately depends on your particular project’s needs and the viewing platform. If you plan to distribute the footage in HDR format or want to maintain the full dynamic range of the image, keeping it in HLG 10-bit format is the best option. However, if you plan to distribute the footage in SDR or Rec709 format, converting the footage to Rec709 may be necessary. Ultimately, it’s essential to experiment and find the workflow that works best for you and your project.
It’s worth noting that some editing software, such as Adobe Premiere Pro, have built-in HLG to Rec709 conversion options, which can simplify the workflow. This allows you to edit the footage in Rec709 format while retaining the HLG metadata, which can be useful if you want to go back to the HLG format at a later stage.
When it comes to applying LUTs to HLG footage, it’s important to remember that LUTs are not a one-size-fits-all solution. You may need to adjust the LUT settings to achieve the desired look, and some experimentation may be necessary to find the best LUT for your particular footage.
Editing HLG footage and applying LUTs without converting to Rec709 can offer several benefits, such as maintaining the full dynamic range of the image and greater flexibility in post-production. However, it’s important to consider the limitations and ensure that your workflow is compatible with your intended viewing platform. By experimenting with different approaches, you can find the workflow that works best for you and your project.
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