avenc_mpeg1video

libav mpeg1video encoder

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstVideoEncoder
                    ╰──avenc_mpeg1video

Implemented interfaces

Factory details

Authors: – Wim Taymans , Ronald Bultje

Classification:Codec/Encoder/Video

Rank – secondary

Plugin – libav

Package – GStreamer FFMPEG Plug-ins

Pad Templates

sink

video/x-raw:
      framerate: { (fraction)24000/1001, (fraction)24/1, (fraction)25/1, (fraction)30000/1001, (fraction)30/1, (fraction)50/1, (fraction)60000/1001, (fraction)60/1, (fraction)15/1, (fraction)5/1, (fraction)10/1, (fraction)12/1, (fraction)15/1 }
         format: I420

Presencealways

Directionsink

Object typeGstPad


src

video/mpeg:
    mpegversion: 1
   systemstream: false

Presencealways

Directionsrc

Object typeGstPad


Properties

a53cc

“a53cc” gboolean

Use A53 Closed Captions (if available) (Private codec option)

Flags : Read / Write

Default value : true


b-qfactor

“b-qfactor” gfloat

QP factor between P- and B-frames (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 1.25


b-qoffset

“b-qoffset” gfloat

QP offset between P- and B-frames (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 1.25


b-sensitivity

“b-sensitivity” gint

Adjust sensitivity of b_frame_strategy 1 (Private codec option)

Flags : Read / Write

Default value : 40


b-strategy

“b-strategy” gint

Strategy to choose between I/P/B-frames (Private codec option)

Flags : Read / Write

Default value : 0


bidir-refine

“bidir-refine” gint

refine the two motion vectors used in bidirectional macroblocks (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 1


bitrate

“bitrate” gint

set bitrate (in bits/s) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 200000


bitrate-tolerance

“bitrate-tolerance” gint

Set video bitrate tolerance (in bits/s). In 1-pass mode, bitrate tolerance specifies how far ratecontrol is willing to deviate from the target average bitrate value. This is not related to minimum/maximum bitrate. Lowering tolerance too much has an adverse effect on quality. (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 4000000


border-mask

“border-mask” gfloat

increase the quantizer for macroblocks close to borders (Private codec option)

Flags : Read / Write

Default value : 0


brd-scale

“brd-scale” gint

Downscale frames for dynamic B-frame decision (Private codec option)

Flags : Read / Write

Default value : 0


bufsize

“bufsize” gint

set ratecontrol buffer size (in bits) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


chroma-elim-threshold

“chroma-elim-threshold” gint

single coefficient elimination threshold for chrominance (negative values also consider dc coefficient) (Private codec option)

Flags : Read / Write

Default value : 0


chroma-sample-location

“chroma-sample-location” avcodeccontext-chroma-sample-location-type *

chroma sample location (Generic codec option, might have no effect)

Flags : Read / Write

Default value : unknown (0)


chromaoffset

“chromaoffset” gint

chroma QP offset from luma (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


cmp

“cmp” avcodeccontext-cmp-func *

full-pel ME compare function (Generic codec option, might have no effect)

Flags : Read / Write

Default value : sad (0)


coder

“coder” avcodeccontext-coder *

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : vlc (0)


compression-level

“compression-level” gint

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : -1


context

“context” gint

context model (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


dark-mask

“dark-mask” gfloat

compresses dark areas stronger than medium ones (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


dc

“dc” gint

intra_dc_precision (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


dct

“dct” avcodeccontext-dct *

DCT algorithm (Generic codec option, might have no effect)

Flags : Read / Write

Default value : auto (0)


debug

“debug” avcodeccontext-debug *

print specific debug info (Generic codec option, might have no effect)

Flags : Read / Write

Default value : (none)


dia-size

“dia-size” gint

diamond type & size for motion estimation (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


drop-frame-timecode

“drop-frame-timecode” gboolean

Timecode is in drop frame format. (Private codec option)

Flags : Read / Write

Default value : false


dump-separator

“dump-separator” gchararray

set information dump field separator (Generic codec option, might have no effect)

Flags : Read / Write

Default value : NULL


error-rate

“error-rate” gint

Simulate errors in the bitstream to test error concealment. (Private codec option)

Flags : Read / Write

Default value : 0


field-order

“field-order” avcodeccontext-field-order *

Field order (Generic codec option, might have no effect)

Flags : Read / Write

Default value : unknown (0)


flags

“flags” avcodeccontext-flags *

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : (none)


flags2

“flags2” avcodeccontext-flags2 *

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : (none)


force-duplicated-matrix

“force-duplicated-matrix” gboolean

Always write luma and chroma matrix for mjpeg, useful for rtp streaming. (Private codec option)

Flags : Read / Write

Default value : false


global-quality

“global-quality” gint

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


gop-size

“gop-size” gint

set the group of picture (GOP) size (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 12


gop-timecode

“gop-timecode” gchararray

MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start. (Private codec option)

Flags : Read / Write

Default value : NULL


i-qfactor

“i-qfactor” gfloat

QP factor between P- and I-frames (Generic codec option, might have no effect)

Flags : Read / Write

Default value : -0.8


i-qoffset

“i-qoffset” gfloat

QP offset between P- and I-frames (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


ibias

“ibias” gint

intra quant bias (Private codec option)

Flags : Read / Write

Default value : 999999


idct

“idct” avcodeccontext-idct *

select IDCT implementation (Generic codec option, might have no effect)

Flags : Read / Write

Default value : auto (0)


ildctcmp

“ildctcmp” avcodeccontext-cmp-func *

interlaced DCT compare function (Generic codec option, might have no effect)

Flags : Read / Write

Default value : vsad (8)


intra-vlc

“intra-vlc” gboolean

Use MPEG-2 intra VLC table. (Private codec option)

Flags : Read / Write

Default value : false


keyint-min

“keyint-min” gint

minimum interval between IDR-frames (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 25


last-pred

“last-pred” gint

amount of motion predictors from the previous frame (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


lmax

“lmax” gint

maximum Lagrange factor (VBR) (Private codec option)

Flags : Read / Write

Default value : 3658


lmin

“lmin” gint

minimum Lagrange factor (VBR) (Private codec option)

Flags : Read / Write

Default value : 236


luma-elim-threshold

“luma-elim-threshold” gint

single coefficient elimination threshold for luminance (negative values also consider dc coefficient) (Private codec option)

Flags : Read / Write

Default value : 0


lumi-mask

“lumi-mask” gfloat

compresses bright areas stronger than medium ones (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


max-bframes

“max-bframes” gint

set maximum number of B-frames between non-B-frames (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


max-pixels

“max-pixels” gint64

Maximum number of pixels (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 2147483647


maxrate

“maxrate” gint64

maximum bitrate (in bits/s). Used for VBV together with bufsize. (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


mbcmp

“mbcmp” avcodeccontext-cmp-func *

macroblock compare function (Generic codec option, might have no effect)

Flags : Read / Write

Default value : sad (0)


mbd

“mbd” avcodeccontext-mbd *

macroblock decision algorithm (high quality mode) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : simple (0)


mblmax

“mblmax” gint

maximum macroblock Lagrange factor (VBR) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 3658


mblmin

“mblmin” gint

minimum macroblock Lagrange factor (VBR) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 236


me-range

“me-range” gint

limit motion vectors range (1023 for DivX player) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


mepc

“mepc” gint

Motion estimation bitrate penalty compensation (1.0 = 256) (Private codec option)

Flags : Read / Write

Default value : 256


mepre

“mepre” gint

pre motion estimation (Private codec option)

Flags : Read / Write

Default value : 0


minrate

“minrate” gint64

minimum bitrate (in bits/s). Most useful in setting up a CBR encode. It is of little use otherwise. (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


motion-est

“motion-est” Mpeg1video-encoder-motion-est *

motion estimation algorithm (Private codec option)

Flags : Read / Write

Default value : epzs (1)


mpeg-quant

“mpeg-quant” gint

Use MPEG quantizers instead of H.263 (Private codec option)

Flags : Read / Write

Default value : 0


mpv-flags

“mpv-flags” Mpeg1video-encoder-mpv-flags *

Flags common for all mpegvideo-based encoders. (Private codec option)

Flags : Read / Write

Default value : (none)


multipass-cache-file

“multipass-cache-file” gchararray

Filename for multipass cache file

Flags : Read / Write / Construct

Default value : stats.log


mv0-threshold

“mv0-threshold” gint

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 256


noise-reduction

“noise-reduction” gint

Noise reduction (Private codec option)

Flags : Read / Write

Default value : 0


nr

“nr” gint

noise reduction (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


nssew

“nssew” gint

nsse weight (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 8


p-mask

“p-mask” gfloat

inter masking (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


pass

“pass” GstLibAVEncPass *

Encoding pass/type

Flags : Read / Write / Construct

Default value : cbr (0)


pbias

“pbias” gint

inter quant bias (Private codec option)

Flags : Read / Write

Default value : 999999


pre-dia-size

“pre-dia-size” gint

diamond type & size for motion estimation pre-pass (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


precmp

“precmp” avcodeccontext-cmp-func *

pre motion estimation compare function (Generic codec option, might have no effect)

Flags : Read / Write

Default value : sad (0)


pred

“pred” avcodeccontext-pred *

prediction method (Generic codec option, might have no effect)

Flags : Read / Write

Default value : left (0)


preme

“preme” gint

pre motion estimation (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


ps

“ps” gint

RTP payload size in bytes (Private codec option)

Flags : Read / Write

Default value : 0


qblur

“qblur” gfloat

video quantizer scale blur (VBR) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0.5


qcomp

“qcomp” gfloat

video quantizer scale compression (VBR). Constant of ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0 (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0.5


qdiff

“qdiff” gint

maximum difference between the quantizer scales (VBR) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 3


qmax

“qmax” gint

maximum video quantizer scale (VBR) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 31


qmin

“qmin” gint

minimum video quantizer scale (VBR) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 2


qsquish

“qsquish” gfloat

how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function) (Private codec option)

Flags : Read / Write

Default value : 0


quantizer

“quantizer” gfloat

Constant Quantizer

Flags : Read / Write / Construct

Default value : 0.01


quantizer-noise-shaping

“quantizer-noise-shaping” gint

(null) (Private codec option)

Flags : Read / Write

Default value : 0


rc-buf-aggressivity

“rc-buf-aggressivity” gfloat

currently useless (Private codec option)

Flags : Read / Write

Default value : 1


rc-eq

“rc-eq” gchararray

Set rate control equation. When computing the expression, besides the standard functions defined in the section 'Expression Evaluation', the following functions are available: bits2qp(bits), qp2bits(qp). Also the following constants are available: iTex pTex tex mv fCode iCount mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex avgTex. (Private codec option)

Flags : Read / Write

Default value : NULL


rc-init-cplx

“rc-init-cplx” gfloat

initial complexity for 1-pass encoding (Private codec option)

Flags : Read / Write

Default value : 0


rc-init-occupancy

“rc-init-occupancy” gint

number of bits which should be loaded into the rc buffer before decoding starts (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


rc-max-vbv-use

“rc-max-vbv-use” gfloat

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


rc-min-vbv-use

“rc-min-vbv-use” gfloat

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 3


rc-qmod-amp

“rc-qmod-amp” gfloat

experimental quantizer modulation (Private codec option)

Flags : Read / Write

Default value : 0


rc-qmod-freq

“rc-qmod-freq” gint

experimental quantizer modulation (Private codec option)

Flags : Read / Write

Default value : 0


rc-strategy

“rc-strategy” Mpeg1video-encoder-rc-strategy *

ratecontrol method (Private codec option)

Flags : Read / Write

Default value : ffmpeg (0)


refs

“refs” gint

reference frames to consider for motion compensation (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 1


sc-threshold

“sc-threshold” gint

Scene change threshold (Private codec option)

Flags : Read / Write

Default value : 0


scan-offset

“scan-offset” gboolean

Reserve space for SVCD scan offset user data. (Private codec option)

Flags : Read / Write

Default value : false


scplx-mask

“scplx-mask” gfloat

spatial complexity masking (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


side-data-only-packets

“side-data-only-packets” gboolean

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : true


skip-cmp

“skip-cmp” Mpeg1video-encoder-cmp-func *

Frame skip compare function (Private codec option)

Flags : Read / Write

Default value : dctmax (13)


skip-exp

“skip-exp” gint

Frame skip exponent (Private codec option)

Flags : Read / Write

Default value : 0


skip-factor

“skip-factor” gint

Frame skip factor (Private codec option)

Flags : Read / Write

Default value : 0


skip-threshold

“skip-threshold” gint

Frame skip threshold (Private codec option)

Flags : Read / Write

Default value : 0


skipcmp

“skipcmp” avcodeccontext-cmp-func *

frame skip compare function (Generic codec option, might have no effect)

Flags : Read / Write

Default value : dctmax (13)


slices

“slices” gint

set the number of slices, used in parallelized encoding (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


strict

“strict” avcodeccontext-strict *

how strictly to follow the standards (Generic codec option, might have no effect)

Flags : Read / Write

Default value : normal (0)


subcmp

“subcmp” avcodeccontext-cmp-func *

sub-pel ME compare function (Generic codec option, might have no effect)

Flags : Read / Write

Default value : sad (0)


subq

“subq” gint

sub-pel motion estimation quality (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 8


tcplx-mask

“tcplx-mask” gfloat

temporal complexity masking (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


thread-type

“thread-type” avcodeccontext-thread-type *

select multithreading type (Generic codec option, might have no effect)

Flags : Read / Write

Default value : slice+frame


threads

“threads” avcodeccontext-threads *

set the number of threads (Generic codec option, might have no effect)

Flags : Read / Write

Default value : unknown (1)


ticks-per-frame

“ticks-per-frame” gint

(null) (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 1


timecode-frame-start

“timecode-frame-start” gint64

GOP timecode frame start number, in non-drop-frame format (Private codec option)

Flags : Read / Write

Default value : 18446744073709551615


trellis

“trellis” gint

rate-distortion optimal quantization (Generic codec option, might have no effect)

Flags : Read / Write

Default value : 0


Named constants

Mpeg1video-encoder-cmp-func

Members

sad (0) – Sum of absolute differences, fast
sse (1) – Sum of squared errors
satd (2) – Sum of absolute Hadamard transformed differences
dct (3) – Sum of absolute DCT transformed differences
psnr (4) – Sum of squared quantization errors, low quality
bit (5) – Number of bits needed for the block
rd (6) – Rate distortion optimal, slow
zero (7) – Zero
vsad (8) – Sum of absolute vertical differences
vsse (9) – Sum of squared vertical differences
nsse (10) – Noise preserving sum of squared differences
dctmax (13) – dctmax
dct264 (14) – dct264
msad (15) – Sum of absolute differences, median predicted
chroma (256) – chroma

Mpeg1video-encoder-motion-est

Members

zero (0) – zero
epzs (1) – epzs
xone (2) – xone

Mpeg1video-encoder-mpv-flags

Members

skip_rd (0x00000001) – RD optimal MB level residual skipping
strict_gop (0x00000002) – Strictly enforce gop size
qp_rd (0x00000004) – Use rate distortion optimization for qp selection
cbp_rd (0x00000008) – use rate distortion optimization for CBP
naq (0x00000010) – normalize adaptive quantization
mv0 (0x00000020) – always try a mb with mv=<0,0>

Mpeg1video-encoder-rc-strategy

Members

ffmpeg (0) – deprecated, does nothing

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