Documentation:Modules/schroedinger

The schroedinger module replaces the earlier dirac module for decoding and encoding Dirac, a video codec.

Demux

Module: schroedinger
Type	Access demux
First VLC version	0.9.0
Last VLC version	-
Operating system(s)	all
Description	Dirac video decoder using libschroedinger
Shortcut(s)	schroedinger

Options

None.

Mux

Module: schroedinger
Type	Muxer
First VLC version	1.1.8
Last VLC version	-
Operating system(s)	all
Description	Dirac video encoder using libschroedinger
Shortcut(s)	schroedinger, schro

Options

• sout-schro-rate-control <string> {constant_noise_threshold,constant_bitrate,low_delay,lossless,constant_lambda,constant_error,constant_quality} : Method used to encode the video sequence default value: NULL
• sout-schro-quality <float [-1. .. 10.]> : Quality factor to use in constant quality mode default value: -1.
• sout-schro-noise-threshold <float [-1. .. 100.]> : Noise threshold to use in constant noise threshold mode default value: -1.
• sout-schro-bitrate <integer [-1 .. INT_MAX]> : Target bitrate in kbps when encoding in constant bitrate mode default value: -1
• sout-schro-max-bitrate <integer [-1 .. INT_MAX]> : Maximum bitrate in kbps when encoding in constant bitrate mode default value: -1
• sout-schro-min-bitrate <integer [-1 .. INT_MAX]> : Minimum bitrate in kbps when encoding in constant bitrate mode default value: -1
• sout-schro-gop-structure <string> {adaptive,intra_only,backref,chained_backref,biref,chained_biref} : GOP structure used to encode the video sequence default value: NULL
• sout-schro-gop-length <integer [-1 .. INT_MAX]> : Number of pictures between successive sequence headers i.e. length of the group of pictures default value: -1
• sout-schro-chroma-fmt <string> {420,422,444} : Picking chroma format will force a conversion of the video into that format default value: 420
• sout-schro-coding-mode <string> {auto,progressive,field} : Field coding is where interlaced fields are coded separately as opposed to a pseudo-progressive frame default value: auto
• sout-schro-mv-precision <string> {1,1/2,1/4,1/8} : Motion Vector precision in pels default value: NULL
• sout-schro-intra-wavelet <string> {desl_dubuc_9_7,le_gall_5_3,desl_dubuc_13_7,haar_0,haar_1,fidelity,daub_9_7} : Intra picture DWT filter default value: NULL
• sout-schro-inter-wavelet <string> {desl_dubuc_9_7,le_gall_5_3,desl_dubuc_13_7,haar_0,haar_1,fidelity,daub_9_7} : Inter picture DWT filter default value: NULL
• sout-schro-transform-depth <integer [-1 .. SCHRO_LIMIT_ENCODER_TRANSFORM_DEPTH]> : Also known as DWT levels default value: -1
• sout-schro-filtering <string> {none,center_weighted_median,gaussian,add_noise,adaptive_gaussian,lowpass} : Enable adaptive prefiltering default value: NULL
• sout-schro-filter-value <float [-1. .. 100.0]> : Higher value implies more prefiltering default value: -1.

Advanced options

• sout-schro-motion-block-size <string> {auto,small,medium,large} : Size of motion compensation blocks default value: NULL
• sout-schro-motion-block-overlap <string> {automatic,none,partial,full} : Overlap of motion compensation blocks default value: NULL
• sout-schro-me-combined <integer [-1 .. 1]> : Use chroma as part of the motion estimation process default value: -1
• sout-schro-enable-hierarchical-me <integer [-1 .. 1]> : Enable hierarchical Motion Estimation default value: -1
• sout-schro-downsample-levels <integer [-1 .. 8]> : Number of levels of downsampling in hierarchical motion estimation mode default value: -1
• sout-schro-enable-global-me <integer [-1 .. 1]> : Enable Global Motion Estimation default value: -1
• sout-schro-enable-phasecorr-me <integer [-1 .. 1]> : Enable Phase Correlation Estimation default value: -1
• sout-schro-enable-multiquant <integer [-1 .. 1]> : Enable multiple quantizers per subband (one per codeblock) default value: -1
• sout-schro-codeblock-size <string> {automatic,small,medium,large,full} : Size of code blocks in each subband default value: NULL
• sout-schro-enable-scd <integer [-1 .. 1]> : Enable Scene Change Detection default value: -1
• sout-schro-perceptual-weighting <string> {none,ccir959,moo,manos_sakrison} : perceptual weighting method default value: NULL
• sout-schro-perceptual-distance <float [-1. .. 100.]> : perceptual distance to calculate perceptual weight default value: -1
• sout-schro-enable-noarith <integer [-1 .. 1]> : Use variable length codes instead, useful for very high bitrates default value: -1
• sout-schro-horiz-slices <integer [-1 .. INT_MAX]> : Number of horizontal slices per frame in low delay mode default value: -1
• sout-schro-vert-slices <integer [-1 .. INT_MAX]> : Number of vertical slices per frame in low delay mode default value: -1
• sout-schro-force-profile <string> {auto,vc2_low_delay,vc2_simple,vc2_main,main} : Force Profile default value: NULL

Appendix

For the option --sout-schro-gop-structure:

adaptive

No fixed GOP structure. A picture can be intra or inter and refer to previous or future pictures.

intra_only

I-frame only sequence

backref

Inter pictures refere to previous pictures only

chained_backref

Inter pictures refere to previous pictures only

biref

Inter pictures can refer to previous or future pictures

chained_biref

Inter pictures can refer to previous or future pictures

---

For the option --sout-schro-chroma-fmt:

420

4:2:0

422

4:2:2

444

4:4:4

---

For the option --sout-schro-coding-mode:

auto

auto - let encoder decide based upon input (Best)

progressive

force coding frame as single picture

field

force coding frame as separate interlaced fields

---

For the option --sout-schro-motion-block-size:

automatic

automatic - let encoder decide based upon input (Best)

small

small - use small motion compensation blocks

medium

medium - use medium motion compensation blocks

large

large - use large motion compensation blocks

---

For the option --sout-schro-motion-block-overlap:

automatic

automatic - let encoder decide based upon input (Best)

none

none - Motion compensation blocks do not overlap

partial

partial - Motion compensation blocks only partially overlap

full

full - Motion compensation blocks fully overlap

---

For the options --sout-schro-intra-wavelet and --sout-schro-inter-wavelet:

desl_dubuc_9_7

Deslauriers-Dubuc (9,7)

le_gall_5_3

LeGall (5,3)

desl_dubuc_13_7

Deslauriers-Dubuc (13,7)

haar_0

Haar with no shift

haar_1

Haar with single shift per level

fidelity

Fidelity filter

daub_9_7

Daubechies (9,7) integer approximation

---

For the option --sout-schro-codeblock-size:

automatic

automatic - let encoder decide based upon input (Best)

small

small - use small code blocks

medium

medium - use medium sized code blocks

large

large - use large code blocks

full

full - One code block per subband

---

For the option --sout-schro-filtering:

none

No pre-filtering

center_weighted_median

Centre Weighted Median

gaussian

Gaussian Low Pass Filter

add_noise

Add Noise

adaptive_gaussian

Gaussian Adaptive Low Pass Filter

lowpass

Low Pass Filter

---

For the option --sout-schro-force-profile:

auto

automatic - let encoder decide based upon input (Best)

vc2_low_delay

VC2 Low Delay Profile

vc2_simple

VC2 Simple Profile

vc2_main

VC2 Main Profile

main

Main Profile

Source code

• modules/codec/schroedinger.c

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