Answers.Body: <p><a href="https://www.reddit.com/r/hometheater/comments/eholm5/dolby_vision_to_hdr10_conversion/" rel="nofollow noreferrer">Sadly no</a>, not without expensive specialist broadcast processing hardware.</p>
  <p>From the Reddit link,</p>
  <blockquote>
  <p>Dolby Vision is 100% proprietary. There is no incentive at all for
  Dolby to convert anything to HDR10+ to help out Samsung users (and
  pre-2019 Panasonics) when the only reason HDR10+ exists is because
  Samsung didn’t want to pay Dolby for the license.</p>
  <p>Dolby Vision is simply an enhancement layer on top of HDR10 which is
  the base layer. There are a couple types of DV layers. The MEL
  (minimum enhancement layer) and the FEL (full enhancement layer) which
  reconstructs the original 12-bit signal. The FEL is what gives DV a
  large advantage over HDR10 and HDR10+.</p>
  <p>Page 12:</p>
  <p><a href="https://www.dolby.com/us/en/technologies/dolby-vision/dolby-vision-for-creative-professionals/dolby-vision-uhd-bluray-authoring-workflow.pdf" rel="nofollow noreferrer">https://www.dolby.com/us/en/technologies/dolby-vision/dolby-vision-for-creative-professionals/dolby-vision-uhd-bluray-authoring-workflow.pdf</a></p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-05-25T23:11:37.580Z
Answers.LastActivityDate: 2021-05-25T23:11:37.580Z
Answers.UserDisplayName: Chris Woods
Body: <p>I'd like to convert a file recorded from an iPhone 12 to a royalty-free version (for upload to Wikimedia, Flickr, etc). So the transfer involves:</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Source (iPhone proprietary-encumbered)</th>
  <th>Destination (royalty-free)</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>4k 60fps (UHD, not DCI)</td>
  <td>4k 60fps</td>
  </tr>
  <tr>
  <td>BT.2020 in HLG (WCG)</td>
  <td>BT.2020 in HLG (WCG)</td>
  </tr>
  <tr>
  <td>Frame-level dynamic HDR metadata in Dolby Vision profile 8.4</td>
  <td>Frame-level dynamic HDR metadata in HDR10+</td>
  </tr>
  <tr>
  <td>HEVC</td>
  <td>VP9 (open to AV1 as well but that's likely more nascent)</td>
  </tr>
  <tr>
  <td>Bitrate is 31 Mb/s</td>
  <td>Fine with higher bitrate to maintain same SSIM/PSNR</td>
  </tr>
  <tr>
  <td>Audio is in AAC</td>
  <td>Audio to Vorbis/OGG</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>According to <a href="https://codecalamity.com/encoding-uhd-4k-hdr10-videos-with-ffmpeg/" rel="nofollow noreferrer">https://codecalamity.com/encoding-uhd-4k-hdr10-videos-with-ffmpeg/</a> it should be possible to do most of this.
  Anyone can help me cook up the right command for this?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-09-09T11:13:54.643Z
Comments.Text: Can you share the sample file, say via dropbox? I can assist
Comments.UserDisplayName: Dennis Mungai
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-09-10T19:22:26.297Z
Comments.Text: @DennisMungai here you go! https://github.com/sagz/files/releases/tag/v0.1
Comments.UserDisplayName: MyPreciousss
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-10-12T09:01:34.880Z
Comments.Text: I'm currently investigating a solution based on `libplacebo` for this, will report back with findings.
Comments.UserDisplayName: Dennis Mungai
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-12-15T22:31:59.027Z
Comments.Text: any luck, @DennisMungai? :)
Comments.UserDisplayName: MyPreciousss
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-12-20T01:51:39.710Z
Comments.Text: Still investigating, looking into the ffmpeg build for Jellyfin. `libplacebo` seems like a dead end on this one.
Comments.UserDisplayName: Dennis Mungai
Tags: <hdr>
Title: How to convert Dolby Vision HDR to HDR10+?
UserDisplayName: MyPreciousss
ThreadText: # How to convert Dolby Vision HDR to HDR10+?
  
  (Asked by: username_0 on 2021-05-25)
  
  I'd like to convert a file recorded from an iPhone 12 to a royalty-free version (for upload to Wikimedia, Flickr, etc). So the transfer involves:
  
  | Source (iPhone proprietary-encumbered) | Destination (royalty-free) |
  | --- | --- |
  | 4k 60fps (UHD, not DCI) | 4k 60fps |
  | BT.2020 in HLG (WCG) | BT.2020 in HLG (WCG) |
  | Frame-level dynamic HDR metadata in Dolby Vision profile 8.4 | Frame-level dynamic HDR metadata in HDR10+ |
  | HEVC | VP9 (open to AV1 as well but that's likely more nascent) |
  | Bitrate is 31 Mb/s | Fine with higher bitrate to maintain same SSIM/PSNR |
  | Audio is in AAC | Audio to Vorbis/OGG |
  
  According to <https://codecalamity.com/encoding-uhd-4k-hdr10-videos-with-ffmpeg/> it should be possible to do most of this.
  Anyone can help me cook up the right command for this?
  
  **Tags:** hdr
  
  > **Comments:**
  > **username_1**: Can you share the sample file, say via dropbox? I can assist  
  > **username_0**: @username_1 here you go! https://github.com/sagz/files/releases/tag/v0.1  
  > **username_1**: I'm currently investigating a solution based on `libplacebo` for this, will report back with findings.  
  > **username_0**: any luck, @username_1? :)  
  > **username_1**: Still investigating, looking into the ffmpeg build for Jellyfin. `libplacebo` seems like a dead end on this one.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2021-05-25. Score: 1 | Accepted answer
  
  [Sadly no](https://www.reddit.com/r/hometheater/comments/eholm5/dolby_vision_to_hdr10_conversion/), not without expensive specialist broadcast processing hardware.
  
  From the Reddit link,
  
  > Dolby Vision is 100% proprietary. There is no incentive at all for
  > Dolby to convert anything to HDR10+ to help out Samsung users (and
  > pre-2019 Panasonics) when the only reason HDR10+ exists is because
  > Samsung didn’t want to pay Dolby for the license.
  >
  > Dolby Vision is simply an enhancement layer on top of HDR10 which is
  > the base layer. There are a couple types of DV layers. The MEL
  > (minimum enhancement layer) and the FEL (full enhancement layer) which
  > reconstructs the original 12-bit signal. The FEL is what gives DV a
  > large advantage over HDR10 and HDR10+.
  >
  > Page 12:
  >
  > <https://www.dolby.com/us/en/technologies/dolby-vision/dolby-vision-for-creative-professionals/dolby-vision-uhd-bluray-authoring-workflow.pdf>
  
  
  ---
  
  