HandBrakeCLI -i input.mkv -o output.mp4 \
  --encoder x265 \
  --quality 22 \
  --color-space bt709 \
  --color-tranfer bt709 \
  --color-primaries bt709 \
  --tonemap hable \
  --rate 30 \
  --cfr

This feature should be integrated into HandBrake's Preset system.

Click Start Encode at the top. Expectation: This will be slow. Converting HDR to SDR is computationally heavy. A 2-hour movie on a modern 6-core CPU takes 2-4 hours.

A dedicated SDR Conversion group box containing:

  • Dropdown: Tone Mapping Algorithm
  • Dropdown: Target Peak Brightness (nits)
  • Slider: Scene Brightness (Gain)

    • HandBrake must analyze the source stream metadata:

  • Automatic Conversion: If the user selects an output format that does not support HDR (e.g., standard MP4 without HDR metadata) or manually selects BT.709 color space, the Tone Mapping prompt should appear.

    • For batch processing or automation via the command line, the following flags are essential.

    Command Example:

    HandBrakeCLI -i "input.mkv" -o "output.mp4" \
  -e x264 -q 20 \
  --colorspace bt709 \
  --colorprim bt709 \
  --transfer bt709 \
  --colormatrix bt709

    The feature should utilize the zscale or tonemap_opencl (for hardware acceleration) video filters in the encoding pipeline.

    Proposed Filter Chain (FFmpeg equivalent): If the user checks "Enable Tone Mapping" with BT.2390 algorithm:

    zscale=t=linear:npl=100,tonemap=bt2390:desat=0,zscale=t=bt709:m=bt709:r=tv

    Hardware Acceleration Support:

    Convert Hdr To Sdr Handbrake - 

    HandBrakeCLI -i input.mkv -o output.mp4 \
  --encoder x265 \
  --quality 22 \
  --color-space bt709 \
  --color-tranfer bt709 \
  --color-primaries bt709 \
  --tonemap hable \
  --rate 30 \
  --cfr

    This feature should be integrated into HandBrake's Preset system.

    Click Start Encode at the top. Expectation: This will be slow. Converting HDR to SDR is computationally heavy. A 2-hour movie on a modern 6-core CPU takes 2-4 hours.

    A dedicated SDR Conversion group box containing: convert hdr to sdr handbrake

  • Dropdown: Tone Mapping Algorithm
  • Dropdown: Target Peak Brightness (nits)
  • Slider: Scene Brightness (Gain)

    • HandBrake must analyze the source stream metadata:

  • Automatic Conversion: If the user selects an output format that does not support HDR (e.g., standard MP4 without HDR metadata) or manually selects BT.709 color space, the Tone Mapping prompt should appear.

    • For batch processing or automation via the command line, the following flags are essential. HandBrakeCLI -i input

    Command Example:

    HandBrakeCLI -i "input.mkv" -o "output.mp4" \
  -e x264 -q 20 \
  --colorspace bt709 \
  --colorprim bt709 \
  --transfer bt709 \
  --colormatrix bt709

    The feature should utilize the zscale or tonemap_opencl (for hardware acceleration) video filters in the encoding pipeline. This feature should be integrated into HandBrake's Preset

    Proposed Filter Chain (FFmpeg equivalent): If the user checks "Enable Tone Mapping" with BT.2390 algorithm:

    zscale=t=linear:npl=100,tonemap=bt2390:desat=0,zscale=t=bt709:m=bt709:r=tv

    Hardware Acceleration Support: