Web Sharp Pro v7 adds significant new capabilities for sharing HDR photos
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I’m happy to announce the launch of Web Sharp Pro (WSP) v7, which is another free update for all existing customers. The key goal for v7 is to give you even more options to share HDR photos, including in scenarios where HDR photos are not well supported. This launch is very unique, as most of the new capabilities are for Apple Silicon users (for reasons explained below).
With WSP v7, Apple Silicon users can now:
- wCreate an HDR video slideshow with custom transitions and music.
- Share HDR photos on AppleTV via AirPlay or the native Photos app (exported as video)
- Share HDR photos on Facebook and Instagram Reels (exported as video)
- Share HDR photos on YouTube (exported as video)
- Get diagnostic information about your HDR setup
Additionally, both Apple Silicon and Windows users will be able to share HDR photos over iCloud and iMessage (i.e. iPhone text messages) using the new “Apple map” setting in the HDR section. And using this encoding is compatible with exports you can already create for Instagram and Threads, so you may create a single export to use on all these platforms if preferred.
Note: the new HDR video export is only supported on Apple Silicon only at this time (Apple Silicon has the largest installed base of users creating HDR content and is a simpler platform for me to support). These tools would require significant effort to support other platforms that I cannot justify at this time. I anticipate the need to use HDR video slideshows will be reduced HDR photos gain more native supported in the near future. If there is significant user demand longer-term for these features on Windows, I may consider supporting these new features there as well. Support for old Intel-based Macs is not planned as these machines have limited HDR support and MacOS Tahoe is the last update planned to support those old computers. Web Sharp Pro will otherwise continue to support all platforms as it always has – some v7 features are simply limited in scope as development effort is extremely high and I expect expanded HDR photo support in the coming year should reduce the need to use video as a workaround. The new “Apple maps” option to make images compatible with iMessage / iCloud works on all computers, only the video export and diagnostics are limited at this time. For HDR diagnostics on any platform, see my HDR tests and HDR troubleshooting pages.
Workflow to create an HDR video slideshow from your HDR photos:
- Export your photos from Web Sharp Pro using any of the following formats using sRGB, P3, or Rec2020 color:
- JPG (w/gain map) offers the best speed for rendering video. You may set the WSP tone map method to “auto” for faster batch exports (this avoids the need to provide input to the SDR base, since we won’t be using that part of the gain map for video)
- TIF and 32-bit JXL are supported, but the video rendering will be much slower.
- EXR should only be used if you export as sRGB (colorspace is not embedded in EXR)
- Go to the top-right flyout menu (four bars icon) and select “Create Video / HTML slideshow (supports HDR)“. This video feature is only available on Apple Silicon (but other users may continue to create an HTML slideshow)
- Select desired options and click “create HDR video“
- Select the folder with your source images
- You’ll now see a new popup screen with a grid of your images where you can finalize the details:
- Content:
- Click and drag the thumbnails to change the order of images.
- You may click on an image to make it active and then <delete> to remove it from the slideshow (this does not delete the source image). You may use <shift> or <cmd>-click to select multiple images to move or delete at once.
- You may use the “select” option at bottom-right to select images by aspect ratio, which may be helpful if you wish to quickly remove any tall images from a wide video or vice versa.
- Drag and drop any supported images, video, or music you like onto the grid to add more content.
- Click on the music tab to change the order of tracks or trim start/end.
- At the bottom, you may select the desired export size. Use “1080p portrait” for social media such as IG Stories/Reels. You may use 4K for YouTube.
- At the bottom, you may select the time per image and duration of cross fade.
- Right-click an image if you would like a specific image to be faster or slower than the global “time per image”.
- Images use a simple cross-fade by default:
- When you don’t pick any advanced styles, simple cross-fade images will get a black letterbox to fill as needed.
- You may also click “styles” to choose custom transitions such as zooming in.
- If you use styles, you will see cropping rectangles. You may click and drag them to use something other than the default center crop. Double-click an image to see a large preview (helpful for precise cropping).
- The gear icon at bottom-right offers options for encoding:
- HLG is generally safest, but PQ may offer better fidelity to your original
- Quality is usually best left at the default “high”. You can safely use “good” with minimal visual impact. There is little visual benefit to “ultimate” for most slideshows.
- HLG is forced for 1080p vertical and will enforce 1000-nits (3.3 stops), as this is best for social media. You can always set the same dimensions with a custom size if you pref to choose something else, but that is not recommended.
- Content:
- Click “render” to export. Exported video will default to your original source folder, but you may click the folder path at bottom left to choose another location.
- You may make changes and render again if desired, or click “close” (or cmd-W) when you’re ready to exit.
Recommended formats for popular platforms:
- YouTube seems to accept everything.
- 4K landscape is best for sharing to computers / TVs. YouTube will automatically create optional smaller size options for your audience.
- Use 1080p vertical for YouTube shorts.
- There is a significant transcoding delay, which means your video will not show as HDR for a period of time – which may be as long as 3 days in some cases with long videos (or just bad luck if their servers are busy).
- As you can control publication, it is best to wait until you see HDR (red indicator in the gear icon) before sharing your video.
- Instagram Stories and Reels:
- Use 1080p vertical.
- Unlike HDR photos, HDR video support is not deterministic on IG. Test accounts with no followers may never show an HDR result. However, transcoding is typically quick for accounts which will get HDR (wait a few minutes before checking your upload).
- IG will show video as HDR in the mobile apps, but will not on the website (unlike photos, which work as HDR on a computer just fine). You may safely upload the content from a computer.
- Threads should work like IG, but I have not yet confirmed it.
- Facebook seems to accept everything:
- Use 1080p portrait for Reels/Stories (just like IG).
- Use 1080p landscape for the feed (2K and 4K are safe, just not beneficial).
- Facebook will hold your video while transcoding and not share it until ready.
- Like IG, you may upload from a computer, but only the mobile app will show video as HDR.
On Meta (IG, FB), you unfortunately cannot prevent your video from being shared before the HDR version is fully ready (drafts and scheduled posts do not seem to help). However, as transcoding is typically very quick, it isn’t a big issue (for the small number of people who might see an SDR video, they will still see a pretty good result – just not the ideal HDR).
Note that HDR video is inherently different from HDR photos. There is no pragmatic artistic control like gain maps for consumer video at this time – but most people seeing these videos on IG / Threads / FB are using mobile devices where HDR support is extremely common.
Workflow to create images which will show as HDR on iMessage and iCloud:
All you need to go it go to WSP Settings / File and check the new “Apple maps” option (this is available on all computers using WSP). When you do this, the image will be encoded so that Apple preserves HDR over iMessage (text messages received on iPhone) and iCloud. The image will also have its normal ISO encoding so that the image works in all the usual places.
Due to limits in Apple’s format, there is some loss of quality when using this encoding. Specifically, the gain map uses luminosity only, which means that the HDR may not be as colorful as your source (as bright values in the base SDR will often have lower saturation). For this reason, you may wish to use this option selectively (when needed) or at least compare exports with and without it to determine what is best for your needs.
HDR Diagnostics:
To help evaluate HDR performance on your system, there is a new [HDR monitor diagnostics…] option in the top-right flyout menu of WSP (only available under Apple Silicon). This will show your current HDR headroom and a comprehensive list of factors which may affect HDR performance for your education and review.
Please see how to share HDR photos nearly anywhere for more information on how to get the most out of Web Sharp Pro v7.



