![]() |
![]() |
![]() |
GStreamer Bad Plugins 0.10 Plugins Reference Manual | ![]() |
---|---|---|---|---|
Top | Description | Object Hierarchy | Implemented Interfaces | Properties |
"altscan-mpeg2" gboolean : Read / Write "aspect" GstMpeg2encAspect : Read / Write "b-per-refframe" gint : Read / Write "bitrate" gint : Read / Write "bufsize" gint : Read / Write "closed-gop" gboolean : Read / Write "constraints" gboolean : Read / Write "correct-svcd-hds" gboolean : Read / Write "dualprime" gboolean : Read / Write "dummy-svcd-sof" gboolean : Read / Write "force-b-b-p" gboolean : Read / Write "format" GstMpeg2encFormat : Read / Write "framerate" GstMpeg2encFramerate : Read / Write "interlace-mode" GstMpeg2encInterlaceMode : Read / Write "intra-dc-prec" gint : Read / Write "keep-hf" gboolean : Read / Write "max-gop-size" gint : Read / Write "min-gop-size" gint : Read / Write "motion-search-radius" gint : Read / Write "non-video-bitrate" gint : Read / Write "norm" GstMpeg2encVideoNorm : Read / Write "playback-field-order" GstMpeg2encPlaybackFieldOrders : Read / Write "pulldown-3-2" gboolean : Read / Write "quant-matrix" GstMpeg2encQuantisationMatrix : Read / Write "quant-reduction-max-var" gfloat : Read / Write "quantisation" gint : Read / Write "quantisation-reduction" gfloat : Read / Write "reduce-hf" gfloat : Read / Write "reduction-2x2" gint : Read / Write "reduction-4x4" gint : Read / Write "sequence-header-every-gop" gboolean : Read / Write "sequence-length" gint : Read / Write "unit-coeff-elim" gint : Read / Write "vcd-still-size" gint : Read / Write
This element encodes raw video into an MPEG-1/2 elementary stream using the mjpegtools library. Documentation on MPEG encoding in general can be found in the MJPEG Howto and on the various available parameters in the documentation of the mpeg2enc tool in particular, which shares options with this element.
1 |
gst-launch-0.10 videotestsrc num-buffers=1000 ! mpeg2enc ! filesink location=videotestsrc.m1v |
Likely, the "format" property is most important, as it selects the type of MPEG stream that is produced. In particular, default property values are dependent on the format, and can even be forcibly restrained to certain pre-sets (and thereby ignored). Note that the (S)VCD profiles also restrict the image size, so some scaling may be needed to accomodate this. The so-called generic profiles (as used in the example above) allow most parameters to be adjusted.
1 |
gst-launch-0.10 videotestsrc num-buffers=1000 ! videoscale ! mpeg2enc format=1 norm=p ! filesink location=videotestsrc.m1v |
"altscan-mpeg2"
property"altscan-mpeg2" gboolean : Read / Write
Alternate MPEG-2 block scanning. Disabling this might make buggy players play SVCD streams.
Default value: TRUE
"aspect"
property "aspect" GstMpeg2encAspect : Read / Write
Display aspect ratio.
Default value: Deduce from input
"b-per-refframe"
property"b-per-refframe" gint : Read / Write
Number of B frames between each I/P frame.
Allowed values: [0,2]
Default value: 0
"bitrate"
property"bitrate" gint : Read / Write
Compressed video bitrate (kbps).
Allowed values: [0,10000]
Default value: 1125
"bufsize"
property"bufsize" gint : Read / Write
Target decoders video buffer size (kB) (default depends on format).
Allowed values: [20,4000]
Default value: 46
"closed-gop"
property"closed-gop" gboolean : Read / Write
All Group-of-Pictures are closed (for multi-angle DVDs).
Default value: FALSE
"constraints"
property"constraints" gboolean : Read / Write
Use strict video resolution and bitrate checks.
Default value: TRUE
"correct-svcd-hds"
property"correct-svcd-hds" gboolean : Read / Write
Force SVCD width to 480 instead of 540/720.
Default value: FALSE
"dualprime"
property"dualprime" gboolean : Read / Write
Dual Prime Motion Estimation Mode for MPEG-2 I/P-frame only streams. Quite some players do not support this.
Default value: FALSE
"dummy-svcd-sof"
property"dummy-svcd-sof" gboolean : Read / Write
Generate dummy SVCD scan-data (for vcdimager).
Default value: TRUE
"force-b-b-p"
property"force-b-b-p" gboolean : Read / Write
Force two B frames between I/P frames when closing GOP boundaries.
Default value: FALSE
"format"
property "format" GstMpeg2encFormat : Read / Write
Encoding profile format.
Default value: Generic MPEG-1
"framerate"
property "framerate" GstMpeg2encFramerate : Read / Write
Output framerate.
Default value: Same as input
"interlace-mode"
property "interlace-mode" GstMpeg2encInterlaceMode : Read / Write
MPEG-2 motion estimation and encoding modes.
Default value: Progressive
"intra-dc-prec"
property"intra-dc-prec" gint : Read / Write
Number of bits precision for DC (base colour) in MPEG-2 blocks.
Allowed values: [8,11]
Default value: 9
"keep-hf"
property"keep-hf" gboolean : Read / Write
Maximize high-frequency resolution (for high-quality sources).
Default value: FALSE
"max-gop-size"
property"max-gop-size" gint : Read / Write
Maximal size per Group-of-Pictures (-1=default).
Allowed values: [G_MAXULONG,250]
Default value: -1
"min-gop-size"
property"min-gop-size" gint : Read / Write
Minimal size per Group-of-Pictures (-1=default).
Allowed values: [G_MAXULONG,250]
Default value: -1
"motion-search-radius"
property"motion-search-radius" gint : Read / Write
Motion compensation search radius.
Allowed values: [0,32]
Default value: 16
"non-video-bitrate"
property"non-video-bitrate" gint : Read / Write
Assumed bitrate of non-video for sequence splitting (kbps).
Allowed values: [0,10000]
Default value: 0
"norm"
property "norm" GstMpeg2encVideoNorm : Read / Write
Tag output for specific video norm.
Default value: Unspecified
"playback-field-order"
property "playback-field-order" GstMpeg2encPlaybackFieldOrders : Read / Write
Force specific playback field order.
Default value: Unspecified
"pulldown-3-2"
property"pulldown-3-2" gboolean : Read / Write
Generate header flags for 3-2 pull down 24fps movies.
Default value: FALSE
"quant-matrix"
property "quant-matrix" GstMpeg2encQuantisationMatrix : Read / Write
Quantisation matrix to use for encoding.
Default value: Default
"quant-reduction-max-var"
property"quant-reduction-max-var" gfloat : Read / Write
Maximal luma variance below which quantisation boost is used.
Allowed values: [0,2500]
Default value: 100
"quantisation"
property"quantisation" gint : Read / Write
Quantisation factor (-1=cbr, 0=default, 1=best, 31=worst).
Allowed values: [G_MAXULONG,31]
Default value: 0
"quantisation-reduction"
property"quantisation-reduction" gfloat : Read / Write
Max. quantisation reduction for highly active blocks.
Allowed values: [-4,10]
Default value: 0
"reduce-hf"
property"reduce-hf" gfloat : Read / Write
How much to reduce high-frequency resolution (by increasing quantisation).
Allowed values: [0,2]
Default value: 0
"reduction-2x2"
property"reduction-2x2" gint : Read / Write
Reduction factor for 2x2 subsampled candidate motion estimates (1=max. quality, 4=max. speed).
Allowed values: [1,4]
Default value: 3
"reduction-4x4"
property"reduction-4x4" gint : Read / Write
Reduction factor for 4x4 subsampled candidate motion estimates (1=max. quality, 4=max. speed).
Allowed values: [1,4]
Default value: 2
"sequence-header-every-gop"
property"sequence-header-every-gop" gboolean : Read / Write
Include a sequence header in every GOP.
Default value: FALSE
"sequence-length"
property"sequence-length" gint : Read / Write
Place a sequence boundary after each <num> MB (0=disable).
Allowed values: [0,10240]
Default value: 0
"unit-coeff-elim"
property"unit-coeff-elim" gint : Read / Write
How agressively small-unit picture blocks should be skipped.
Allowed values: [-40,40]
Default value: 0
"vcd-still-size"
property"vcd-still-size" gint : Read / Write
Size of VCD stills (in KB).
Allowed values: [0,512]
Default value: 0