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docs: sync 1.9.0 with latest

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8
source/docs/en/1.9.0/advanced/surround-sound.markdown
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@ -51,8 +51,10 @@ The following source format's can be passed thru.
- DTS (Limited player compatibility in MP4)
- DTS-HD (Limited player compatibility in MP4)
- TrueHD (Limited player compatibility in MP4)
- FLAC (MKV files only)
- FLAC
- ALAC
- AAC
- MP3
- MP2
- MP3 (Limited player compatibility in MP4)
- MP2 (Limited player compatibility in MP4)
- Opus
- Vorbis

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source/docs/en/1.9.0/developer/build-mac.markdown
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@ -39,6 +39,7 @@ Optional dependencies (required by libdovi)
- `rustup target add aarch64-apple-darwin` for cross-compiling for Apple Silicon on an Intel Mac
- `rustup target add x86_64-apple-darwin` for cross-compiling for Intel on an Apple Silicon Mac
- [openssl](https://www.openssl.org)
- may be built via included script
- [cargo-c](https://github.com/lu-zero/cargo-c)
- Can be installed by running `cargo install cargo-c`

2
source/docs/en/1.9.0/help/activity-log.markdown
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@ -129,7 +129,7 @@ You can access the current log by opening the Activity Log window in HandBrake.
On Mac, logs are stored at the following locations, where `Username` is your user name:
- `/Users/Username/Library/Containers/fr.handbrake.HandBrake/Data/Library/Application Support/HandBrake/EncodeLogs` for HandBrake 1.3.0 and later, sandboxed nightly/snapshot builds, and sandboxed personal builds
- `/Users/Username/Library/Containers/fr.handbrake.HandBrake/Data/Library/Application Support/HandBrake/EncodeLogs` for HandBrake 1.3.0 and later, sandboxed nightly/snapshot builds, and sandboxed personal builds (the fr.handbrake.HandBrake folder is shown as HandBrake in Finder)
- `/Users/Username/Library/Application Support/HandBrake/EncodeLogs` for HandBrake 1.2.2 and earlier, older non-sandboxed nightly/snapshot builds, and non-sandboxed personal builds
You can open the applicable location directly from HandBrake’s Activity Log window.

16
source/docs/en/1.9.0/technical/audio-codecs.markdown
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@ -47,7 +47,7 @@ Audio Encoders
- On Mac, HandBrake uses Apple's CoreAudio AAC encoder. It's known to be
much better quality and is the default option for Mac users.
- HE-AAC (Mac Only)
- HE-AAC (Mac Only):
- High Efficiency AAC encoder. This encoder is optimized for low-bitrate
applications which may be useful for streaming.
@ -63,9 +63,9 @@ Audio Encoders
- HandBrake offers Vorbis audio encoding as well.
- Opus
- Opus:
- Available in MKV files, Opus is the successor to Vorbis. HandBrake uses libopus for encoding.
- Opus is the successor to Vorbis. HandBrake uses libopus for encoding.
- AC3 and E-AC3:
@ -73,22 +73,24 @@ Audio Encoders
- This is not the same as Passthru. You can encode any audio track to AC3.
- Flac 16 and 24bit (FFmpeg)
- Flac 16 and 24bit (FFmpeg):
- Lossless audio compression.
- Available in MKV files.
- It is not currently possible to passthru the compression level to the
ffmpeg encoder which is currently defaulted to "5"
- ALAC 16 and 24bit:
- Lossless audio compression.
 
Passthru options.
-----------------
HandBrake supports passthru for a limited number of popular source formats.
These are: AC3, E-AC3, DTS, DTS-HD, TrueHD, MP3, MP2, AAC or flac (Passthru)
These are: AC3, E-AC3, DTS, DTS-HD, TrueHD, Opus, Vorbis, MP3, MP2, AAC, FLAC or ALAC (Passthru)
This copies the audio bit-for-bit from the source so offers no loss in audio
quality. These audio tracks can be quite large so can impact the final size of

14
source/docs/en/1.9.0/technical/audio-quality.markdown
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@ -31,20 +31,22 @@ There are several different modes HandBrake can operate in.
### Average Bitrate
HandBrake supports average bitrate for all audio encoders except FLAC.
HandBrake supports average bitrate for all audio encoders except FLAC, ALAC, and TrueHD.
### Quality based Encoding
Quality based encoding is supported for the following codecs:
- AAC
- MP3
- Vorbis
- Opus
The scale of the quality if much less pronounced compared to the video quality slider, so changes do not have nearly as big an impact on file size.
### Lossless
HandBrake supports FLAC (both 16 and 24bit) when the output format is MKV.
HandBrake supports FLAC and ALAC (both 16 and 24bit) when the output format is MKV or MP4.
In addition, HandBrake can passthru the following source audio track formats:
@ -53,9 +55,9 @@ In addition, HandBrake can passthru the following source audio track formats:
- TrueHD
- AAC
- MP3
- Opus
- Vorbis
- TrueHD
- FLAC
- ALAC

8
source/docs/en/1.9.0/technical/containers.markdown
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@ -26,8 +26,8 @@ HandBrake creates the widely supported container formats MKV and MP4 (sometimes
Features and playback compatiblity varies between MKV, WebM, and MP4. The following is a summary of some of these differences:
- MP4 container.
- Supports H.264, H.265, MPEG-4, MPEG-2, AV1 video.
- It stores audio in the AAC, MP3, AC3, E-AC3, and Opus format. AAC is recommended for better compatibility on most players. It is also possible to pass through Dolby Digital 5.1 Surround Sound (AC3) audio from a DVD or Blu-ray, and E-AC3 and TrueHD.
- Supports H.264, H.265, MPEG-4, MPEG-2, VP9, AV1 video.
- It stores audio in the AAC, MP3, AC3, E-AC3, TrueHD, Opus, FLAC, and ALAC format. AAC is recommended for better compatibility on most players. It is also possible to pass through Dolby Digital 5.1 Surround Sound (AC3) audio from a DVD or Blu-ray, and E-AC3 and TrueHD.
- MP4 also supports chapters, for which HandBrake uses Apple's chapter format.
- MP4 also is capable of storing [VariableFrameRate Variable Frame Rate] video.
- Be aware that chapters and AC3 audio can only be seen by QuickTime 7 and earlier if you change the file extension from .mp4 to .m4v. HandBrake will do this for you automatically when you enable those features, although this can be disabled in the preferences if you really want .mp4 at the end of the name. QuickTime X and later don't require the extension change.
@ -35,8 +35,8 @@ Features and playback compatiblity varies between MKV, WebM, and MP4. The follow
- It can also include "soft" text subtitles that can be turned on or off, instead of always being hard burned into the video frames.
- MKV container.
- Supports H.264, H.265, MPEG-4, MPEG-2, VP8, VP9, AV1, Theora video.
- It stores audio in the AAC, MP3, AC3, E-AC3, Vorbis, Opus, or FLAC formats. It can also pass through the Dolby Digital 5.1 (AC3), Digital Theater Systems (DTS), and TrueHD surround sound formats used by DVDs and Blu-rays.
- Supports H.264, H.265, MPEG-4, MPEG-2, VP8, VP9, AV1, Theora, FFV1 video.
- It stores audio in the AAC, MP3, AC3, E-AC3, TrueHD, Vorbis, Opus, FLAC or ALAC formats. It can also pass through the Dolby Digital 5.1 (AC3), Digital Theater Systems (DTS), and TrueHD surround sound formats used by DVDs and Blu-rays.
- It supports chapters, as well as [VariableFrameRate Variable Frame Rate] video.
- It can include "soft" subtitles that can be turned on or off, instead of always being hard burned into the video frame. These can either be bitmap images of the subtitles included on a DVD (known as vobsub) or text.

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source/docs/en/1.9.0/technical/filters-summary.markdown
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@ -21,13 +21,17 @@ Summary of Filters
HandBrake contains the following filters:
- Detelecine
- Comb Detect
- Deinterlace
- Yadif
- Decomb
- Denoise
- Bwdif
- Deblock
- Denoise
- Chroma Smooth
- Grayscale
- Sharpen
- Colorspace
- Grayscale
Detelecine
@ -41,6 +45,7 @@ Deinterlace
Deinterlace removes comb artifacts from the picture.
Yadif is a popular and fast deinterlacer.
Bwdif is a motion adaptive deinterlacing based on yadif with the use of w3fdif and cubic interpolation algorithms.
Decomb switches between multiple interpolation algorithms for speed and quality.
The following Deinterlace tunes are available:
@ -51,6 +56,12 @@ The following Deinterlace tunes are available:
- Bob: Attempts to better preserve motion for a slight penalty to perceived resolution.
Deblock
-------
Deblock reduces blocky artifacts caused by low quality video compression.
Denoise
-------
@ -71,24 +82,12 @@ For NLMeans the following Denoise tunes are available:
- Sprite: Is useful for 1-/4-/8-/16-bit 2-dimensional games. Sprite is not designed for high definition video.
Deblock
-------
Deblock reduces blocky artifacts caused by low quality video compression.
Chroma Smooth
-------------
Reduces chroma noise, rainbows, and other prominent visual artifacts. Useful for resolving various color-related issues, especially with lower resolution content from analog sources, e.g. poor quality DVD and VHS sources. The blurring/smoothing algorithm is the same as used by the unsharp filter.
Grayscale
---------
Grayscale removes the color component of the video. Often referred to as Black & White video.
Colorspace
----------
@ -100,3 +99,9 @@ Colorspace + tonemap filter. Can change/tonemap the colorspace of the video into
- BT.601 EBU
If this set to "Off" then HandBrake will keep the colorspace of the video.
Grayscale
---------
Grayscale removes the color component of the video. Often referred to as Black & White video.

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source/docs/en/1.9.0/technical/preferences.markdown
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@ -22,7 +22,7 @@ The Preferences menu can be accessed via the "Tools" Menu -> "Preferences" optio
<!-- .system-macos -->
The Preferences menu can be accessed via the "HandBrake" Menu -> "Preferences" option.
The Preferences menu can be accessed via the "HandBrake" Menu -> "Settings" option.
<!-- /.system-macos -->

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source/docs/en/1.9.0/technical/video-bit-depth.markdown
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@ -28,6 +28,8 @@ The follow encoders support higher than 8-bit.
| Nvidia NVEnc |
| Apple Video Toolbox |
| SVT-AV1 |
| VP9 |
| FFV1 |
Please note, you must select a "10-bit" or "12-bit" encoder from the "Video Encoder" dropdown on the "Video" tab to enable this feature.
For hardware encoders, the option will only be shown if the system supports it.

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source/docs/en/1.9.0/technical/video-cq-vs-abr.markdown
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@ -117,7 +117,7 @@ encoder will vary the number of bits given to any one portion of the video, but
try to keep everything at the average you set.
- The video bitrate can be set on the "Video Tab"
- It is recommended that you use 2-Pass encoding.
- It is recommended that you use multi-pass encoding.
- This will provide better quality and better bit-rate distribution. A single
pass will lead to sub-optimal results.
- The "Turbo" checkbox will make the first pass quicker at the expense of

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source/docs/en/1.9.0/technical/video-videotoolbox.markdown
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@ -93,16 +93,18 @@ The following value types are supported (each option only accepts one value type
### Options list
| Option | Type | H.264 | H.265 | Detail |
|------------------|-------------|:-----:|:-----:|-----------------------------------------------------------------------------------------------------------|
| gpu-registryid | int | ✓ | ✓ | GPU selection. If set, the VideoToolbox will only use a hardware encoder running on the GPU specified by the provided GPU registryID. |
| keyint | int | ✓ | ✓ | Sets the maximum interval between key frames, also known as the key frame rate. |
| bframes | boolean | ✓ | ✓ | Set to `1` to enable Reference B-Frames (default), `0` to disable. |
| cabac | boolean | ✓ | | Set to `1` to enable cabac, `0` to disable. Note the hyphen for H.264. |
| slice-max-size | boolean | ✓ | | Sets the maximum slice size for H.264 encoding in bytes. |
| vbv-bufsize | boolean | ✓ | ✓ | Sets the size of the VBV buffer in bytes per second. |
| vbv-maxrate | boolean | ✓ | ✓ | Sets the maximum rate the VBV buffer should be assumed to refill at, in bytes per second. |
| qpmin | int | ✓ | ✓ | Sets the minimum quantizer that will be used. |
| qpmax | int | ✓ | ✓ | Sets the maximum quantizer that will be used. |
| ref | int | ✓ | ✓ | Sets the maximum number of reference frames. |
| max-frame-delay | int | ✓ | ✓ | The maximum frame delay count is the maximum number of frames that a compressor is allowed to hold before it must output a compressed frame. |
| Option | Type | H.264 | H.265 | Detail |
|-----------------------------|-------------|:-----:|:-----:|-----------------------------------------------------------------------------------------------------------|
| gpu-registryid | int | ✓ | ✓ | GPU selection. If set, the VideoToolbox will only use a hardware encoder running on the GPU specified by the provided GPU registryID. |
| keyint | int | ✓ | ✓ | Sets the maximum interval between key frames, also known as the key frame rate. |
| bframes | boolean | ✓ | ✓ | Set to `1` to enable Reference B-Frames (default), `0` to disable. |
| cabac | boolean | ✓ | | Set to `1` to enable cabac, `0` to disable. Note the hyphen for H.264. |
| slice-max-size | boolean | ✓ | | Sets the maximum slice size for H.264 encoding in bytes. |
| vbv-bufsize | boolean | ✓ | ✓ | Sets the size of the VBV buffer in bytes per second. |
| vbv-maxrate | boolean | ✓ | ✓ | Sets the maximum rate the VBV buffer should be assumed to refill at, in bytes per second. |
| qpmin | int | ✓ | ✓ | Sets the minimum quantizer that will be used. |
| qpmax | int | ✓ | ✓ | Sets the maximum quantizer that will be used. |
| ref | int | ✓ | ✓ | Sets the maximum number of reference frames. |
| max-frame-delay | int | ✓ | ✓ | The maximum frame delay count is the maximum number of frames that a compressor is allowed to hold before it must output a compressed frame. |
| look-ahead-frame-count | int | ✓ | ✓ | The suggested number of frames to look ahead for rate control. |
| disable-spatial-adaptive-qp | boolean | ✓ | ✓ | Disable spatial adaptation of the quantization parameter (QP) based on per-frame statistics. |