mpeg2enc

mpeg2enc — High-quality MPEG-1/2 video encoder

Properties

gboolean altscan-mpeg2 Read / Write
GstMpeg2encAspect aspect Read / Write
gint b-per-refframe Read / Write
gint bitrate Read / Write
gint bufsize Read / Write
gboolean closed-gop Read / Write
gboolean constraints Read / Write
gboolean correct-svcd-hds Read / Write
gboolean dualprime Read / Write
gboolean dummy-svcd-sof Read / Write
gboolean force-b-b-p Read / Write
GstMpeg2encFormat format Read / Write
GstMpeg2encFramerate framerate Read / Write
GstMpeg2encInterlaceMode interlace-mode Read / Write
gint intra-dc-prec Read / Write
gboolean keep-hf Read / Write
gint max-gop-size Read / Write
gint min-gop-size Read / Write
gint motion-search-radius Read / Write
gint non-video-bitrate Read / Write
GstMpeg2encVideoNorm norm Read / Write
GstMpeg2encPlaybackFieldOrders playback-field-order Read / Write
gboolean pulldown-3-2 Read / Write
GstMpeg2encQuantisationMatrix quant-matrix Read / Write
gfloat quant-reduction-max-var Read / Write
gint quantisation Read / Write
gfloat quantisation-reduction Read / Write
gfloat reduce-hf Read / Write
gint reduction-2x2 Read / Write
gint reduction-4x4 Read / Write
gboolean sequence-header-every-gop Read / Write
gint sequence-length Read / Write
gint unit-coeff-elim Read / Write
gint vcd-still-size Read / Write

Types and Values

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstElement
                ╰── GstMpeg2enc

Implemented Interfaces

GstMpeg2enc implements GstPreset.

Description

Synopsis

Element Information

plugin

mpeg2enc

author

Andrew Stevens <andrew.stevens@nexgo.de> Ronald Bultje <rbultje@ronald.bitfreak.net>

class

Codec/Encoder/Video

Element Pads

name

sink

direction

sink

presence

always

details

video/x-raw, format=(string)I420, width=(int)[ 16, 4096 ], height=(int)[ 16, 4096 ], framerate=(fraction){ 24000/1001, 24/1, 25/1, 30000/1001, 30/1, 50/1, 60000/1001 }

name

src

direction

source

presence

always

details

video/mpeg, systemstream=(boolean)false, mpegversion=(int){ 1, 2 }, width=(int)[ 16, 4096 ], height=(int)[ 16, 4096 ], framerate=(fraction){ 24000/1001, 24/1, 25/1, 30000/1001, 30/1, 50/1, 60000/1001 }

Functions

Types and Values

GstMpeg2enc

typedef struct _GstMpeg2enc GstMpeg2enc;

Property Details

The “altscan-mpeg2” property

  “altscan-mpeg2”            gboolean

Alternate MPEG-2 block scanning. Disabling this might make buggy players play SVCD streams.

Flags: Read / Write

Default value: TRUE


The “aspect” property

  “aspect”                   GstMpeg2encAspect

Display aspect ratio.

Flags: Read / Write

Default value: Deduce from input


The “b-per-refframe” property

  “b-per-refframe”           gint

Number of B frames between each I/P frame.

Flags: Read / Write

Allowed values: [0,2]

Default value: 0


The “bitrate” property

  “bitrate”                  gint

Compressed video bitrate (kbps).

Flags: Read / Write

Allowed values: [0,40000]

Default value: 1125


The “bufsize” property

  “bufsize”                  gint

Target decoders video buffer size (kB) (default depends on format).

Flags: Read / Write

Allowed values: [20,4000]

Default value: 46


The “closed-gop” property

  “closed-gop”               gboolean

All Group-of-Pictures are closed (for multi-angle DVDs).

Flags: Read / Write

Default value: FALSE


The “constraints” property

  “constraints”              gboolean

Use strict video resolution and bitrate checks.

Flags: Read / Write

Default value: TRUE


The “correct-svcd-hds” property

  “correct-svcd-hds”         gboolean

Force SVCD width to 480 instead of 540/720.

Flags: Read / Write

Default value: FALSE


The “dualprime” property

  “dualprime”                gboolean

Dual Prime Motion Estimation Mode for MPEG-2 I/P-frame only streams. Quite some players do not support this.

Flags: Read / Write

Default value: FALSE


The “dummy-svcd-sof” property

  “dummy-svcd-sof”           gboolean

Generate dummy SVCD scan-data (for vcdimager).

Flags: Read / Write

Default value: TRUE


The “force-b-b-p” property

  “force-b-b-p”              gboolean

Force two B frames between I/P frames when closing GOP boundaries.

Flags: Read / Write

Default value: FALSE


The “format” property

  “format”                   GstMpeg2encFormat

Encoding profile format.

Flags: Read / Write

Default value: Generic MPEG-1


The “framerate” property

  “framerate”                GstMpeg2encFramerate

Output framerate.

Flags: Read / Write

Default value: Same as input


The “interlace-mode” property

  “interlace-mode”           GstMpeg2encInterlaceMode

MPEG-2 motion estimation and encoding modes.

Flags: Read / Write

Default value: Progressive


The “intra-dc-prec” property

  “intra-dc-prec”            gint

Number of bits precision for DC (base colour) in MPEG-2 blocks.

Flags: Read / Write

Allowed values: [8,11]

Default value: 9


The “keep-hf” property

  “keep-hf”                  gboolean

Maximize high-frequency resolution (for high-quality sources).

Flags: Read / Write

Default value: FALSE


The “max-gop-size” property

  “max-gop-size”             gint

Maximal size per Group-of-Pictures (-1=default).

Flags: Read / Write

Allowed values: [G_MAXULONG,250]

Default value: -1


The “min-gop-size” property

  “min-gop-size”             gint

Minimal size per Group-of-Pictures (-1=default).

Flags: Read / Write

Allowed values: [G_MAXULONG,250]

Default value: -1


The “motion-search-radius” property

  “motion-search-radius”     gint

Motion compensation search radius.

Flags: Read / Write

Allowed values: [0,32]

Default value: 16


The “non-video-bitrate” property

  “non-video-bitrate”        gint

Assumed bitrate of non-video for sequence splitting (kbps).

Flags: Read / Write

Allowed values: [0,10000]

Default value: 0


The “norm” property

  “norm”                     GstMpeg2encVideoNorm

Tag output for specific video norm.

Flags: Read / Write

Default value: Unspecified


The “playback-field-order” property

  “playback-field-order”     GstMpeg2encPlaybackFieldOrders

Force specific playback field order.

Flags: Read / Write

Default value: Unspecified


The “pulldown-3-2” property

  “pulldown-3-2”             gboolean

Generate header flags for 3-2 pull down 24fps movies.

Flags: Read / Write

Default value: FALSE


The “quant-matrix” property

  “quant-matrix”             GstMpeg2encQuantisationMatrix

Quantisation matrix to use for encoding.

Flags: Read / Write

Default value: Default


The “quant-reduction-max-var” property

  “quant-reduction-max-var”  gfloat

Maximal luma variance below which quantisation boost is used.

Flags: Read / Write

Allowed values: [0,2500]

Default value: 100


The “quantisation” property

  “quantisation”             gint

Quantisation factor (-1=cbr, 0=default, 1=best, 31=worst).

Flags: Read / Write

Allowed values: [G_MAXULONG,31]

Default value: 0


The “quantisation-reduction” property

  “quantisation-reduction”   gfloat

Max. quantisation reduction for highly active blocks.

Flags: Read / Write

Allowed values: [-4,10]

Default value: 0


The “reduce-hf” property

  “reduce-hf”                gfloat

How much to reduce high-frequency resolution (by increasing quantisation).

Flags: Read / Write

Allowed values: [0,2]

Default value: 0


The “reduction-2x2” property

  “reduction-2x2”            gint

Reduction factor for 2x2 subsampled candidate motion estimates (1=max. quality, 4=max. speed).

Flags: Read / Write

Allowed values: [1,4]

Default value: 3


The “reduction-4x4” property

  “reduction-4x4”            gint

Reduction factor for 4x4 subsampled candidate motion estimates (1=max. quality, 4=max. speed).

Flags: Read / Write

Allowed values: [1,4]

Default value: 2


The “sequence-header-every-gop” property

  “sequence-header-every-gop” gboolean

Include a sequence header in every GOP.

Flags: Read / Write

Default value: FALSE


The “sequence-length” property

  “sequence-length”          gint

Place a sequence boundary after each <num> MB (0=disable).

Flags: Read / Write

Allowed values: [0,10240]

Default value: 0


The “unit-coeff-elim” property

  “unit-coeff-elim”          gint

How agressively small-unit picture blocks should be skipped.

Flags: Read / Write

Allowed values: [-40,40]

Default value: 0


The “vcd-still-size” property

  “vcd-still-size”           gint

Size of VCD stills (in KB).

Flags: Read / Write

Allowed values: [0,512]

Default value: 0