DivX Plus HD

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DivX Plus HD, launched in 2009, is the brand name for the file type that DivX, Inc. has chosen for their high definition video format. DivX Plus HD files consist of high definition H.264/MPEG-4 AVC video with surround sound Advanced Audio Coding (AAC) audio, wrapped up in the open-standard Matroska container, identified by the .mkv file extension. DivX Plus HD files leverage and extend on Matroska's ability to support multiple language tracks, subtitles, chapters, and additional bonus content.

Contents

DivX Plus HD products

Software

As of the release of DivX 7, DivX Plus HD support has been included in the main software bundle.

On 16 March 2010, DivX released DivX Plus Software (version 8) for Windows which included: [1]

DivX Plus HD Profile

DivX has defined profiles which are subsets of MPEG-4/AVI and H264/MKV standards. Because the grouping is a specific subset of what is in the standards, there are certification processes for each of the profiles that device manufacturers must follow. Below is the DivX Plus HD profile. [5]

All DivX Plus HD certified devices bearing a DivX Plus logo will adhere to the profile outlined in the table below, as would any tools that support the DivX profiles. DivX Plus HD devices are also tested for compliance against the DivX HD 1080p profile for MPEG4/AVI certification in order to maintain backwards compatibility [6]

Profile+HD 1080p
CodecMPEG4 part 10 (H.264)
File Extension(s).mkv
Max. resolution (px×px×Hz)1920×1080×30,

1280×720×60

Max VBV bitrate (bit/s)VCL: 20000000,

NAL: 24000000

Min. VBV buffer size (KiB)VCL: 3200, NAL: 3840
Macroblocks (per second)244800
Subtitles8×SRT
Audio8×MP3, AC3, AAC

MKV Extensions

DivX has introduced additional features beyond the Matroska specification that are implemented during the video file creation process and exposed during playback in DivX Plus software and on consumer electronics devices certified for DivX Plus HD. Below are the standard and extended MKV features that are specific to the DivX Plus HD profile. [7] [8]

World Fonts

Currently, font files can be easily attached to .mkv files using a Matroska mux, [9] but certain problems may arise when attempting to utilize a font during playback. Usually, performance is affected because the font file can be large and take time to load for the subtitles. The DivX Plus Word Fonts extension attempts to solve this problem by optimizing the font file during the file creation stage. [10] A DivX Plus mux, like the DivXMKVMux, can examine the subtitle file, determine which characters are required from a font file, and repack the font file for attachment with only the necessary symbols, thereby reducing the font attachment size and decreasing the time it needs to load.

Smooth FF/RW

DivX has released a specification for a DivX Plus extension that aims to improve seeking quickly through a video file, either forward or backward. Called Smooth FF/RW, the creator of the video creates a lower resolution version of the video that is attached to the .mkv file and leveraged whenever a user instructs their player to seek fast forward or rewind. [11] When the user presses fast forward or rewind, the full resolution track is swapped out with the lower resolution version, requiring less resources; when the user presses play, the lower resolution track is instantly swapped out to the full resolution version, which is intended to solve inaccurate seeking issues or a stuttering effect during fast forward and rewind.

Multi-title Play

Episodic content can be packaged into a single file. [12]

Authored and Auto-generated Chapters

Access to chapter points in a video when no chapter information exists. [12]

Quick Start

The format supports quick start where the user can begin viewing even large HD files immediately. [12]

Hardware

The following chips have been certified or have licensing agreements for DivX Plus HD: [13]

IC ProviderModel NumberDate CertifiedTypeNotes
Broadcom BCM35567 September 2010 DTV
BCM354927 August 2010
Mediatek MT8550TBAG23 August 2010 Blu-ray Disc player
MT8550UBAG23 August 2010
MT8555DGBG8 July 2010
MT8555DIBG8 July 2010
MT8555DJBG8 July 2010
MT8555DHBG8 July 2010
OP85316 July 2010
MT8653ACEG17 June 2010
MT8652ACEG8 June 2010
MT8555DDBG3 June 2010
MT8555DCBG3 June 2010
MT8555DEBG3 June 2010
MT8555DFBG27 May 2010
MT8550JBAG17 May 2010
MT8530PEFG24 March 2010MT8530 announced as first DivX Plus HD certified chip. [14]
MT8530MEFG24 March 2010
MT8530KEFG5 November 2009
MT8530JEFG5 November 2009
MT8530AEFG30 September 2009
Panasonic MN2WS0150D316 August 2010 Blu-ray Disc playerUniPhier chips named in licensing agreement. [15]
MN2WS0150D216 August 2010
MN2WS0140DFF110 June 2010
MN2WS0141DFF11 May 2010
Realtek RTD107324 March 2010Digital multimedia processor
RTD12833 March 2010

NEC Electronics has signed a multi-year licensing agreement to include DivX Plus HD in its EMMA chips. [16]

Consumer electronics

The following products have been DivX Plus HD Certified: [17] [18]

OEM / ODM Model NumberDate CertifiedTypeNotes
Denon DBP-1611UD5 October 2010 Blu-ray Disc player
Marantz UD500512 October 2010 Blu-ray Disc player
Panasonic DMP-BDT100EE31 August 2010 Blu-ray Disc player
SC-BTT755EGK27 July 2010
SC-BFT800EBK15 July 2010
SC-BFT800EGK15 July 2010
SC-BFT800GNK15 July 2010
SC-BTT350EGK14 July 2010
SC-BTT755EBK14 July 2010
SC-BTT350EBK14 July 2010
SC-BTT350GNK14 July 2010
SC-BTT755GNK14 July 2010
DMP-BDT100GN22 June 2010
DMP-BDT300EG26 April 2010The DMP-BDT300 has been DivX Plus HD Certified, and is Panasonic's first FullHD 3D Blu-ray Disc player. [19]
DMP-BDT300GN26 April 2010
DMP-BDT300EE26 April 2010
Philips BDP51807 September 2010 Blu-ray Disc player
BDP800031 August 2010
BDP7500B225 March 2010
BDP7500S23 March 2010
BDP7500 MK II5 February 2010
BDP80005 February 2010
BDP51005 February 2010
Soniq QPB302B2 June 2010 Blu-ray Disc player
Seagate FreeAgent GoFlex TV2 September 2010 Digital media receiver
Yamaha BD-S106731 August 2010 Blu-ray Disc player

x264 compatibility

According to documentation provided by DivX on their DivX Developer Portal, it is possible to make DivX Plus HD compatible files via other H.264 encoders, such as the open source x264 encoder. [20] At minimum, the following command line creates an H.264 bitstream within the DivX Plus HD profile:

x264 --vbv-maxrate=20000 --vbv-bufsize=25000 --level 40 --bframes 3 --keyint <4*FPS> -o <output file> <input file> 

Despite the popular transcoding tool HandBrake dropping .avi container support, it can still be used to create DivX Plus compatible videos if MKV is selected for format, x264 is selected for video codec, AAC is used for audio codec, and the following options are passed into the advanced settings: [21]

level=40:ref=2:bframes=2:subq=6:mixed-refs=0:weightb=0:8x8dct=0:trellis=0:vbv-maxrate=20000:vbv-bufsize=25000:weightp=0 

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References

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