Using libplacebo to Fix the Dolby Vision Profile 5 Transcoding Tonemapping Issue

[UnkNow404 3]

The current version cannot transcode DV Profile 5 content correctly. The transcoded video looks like this:

And it should be:

ffmpeg 5.0 support libplacebo to transcode DV Profile 5 to SDR correctly.

Command example:

ffmpeg -init_hw_device vulkan=vulkan -filter_hw_device vulkan -i ${VIDEO_FILE} -c:v hevc -crf 18 -c:a aac -b:a 320k -vf "hwupload,libplacebo=format=yuv420p:colorspace=bt709:color_primaries=bt709:color_trc=bt709,hwdownload,format=yuv420p,subtitles=${SUBTITLE_FILE}" ${OUTPUT}

 

[Luke 42555]

Hi, thanks. This is on our to do list for review. Thanks.

[CFC 25]

On 12/1/2025 at 9:48 AM, Luke said:

Hi, thanks. This is on our to do list for review. Thanks.

Hi, is this still in review, or has it been implemented?

My DV Profile 5 file does not transcode with proper color, but wanted to check whether it should be expected to at the moment.

Thanks!

[Luke 42555]

Hi, we will have a new ffmpeg build on the server beta channel in the near future, so stay tuned for that.