x264enc
libx264-based H.264 video encoder
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──GstVideoEncoder ╰──x264enc
Implemented interfaces
Factory details
Authors: – Josef Zlomek
Classification: – Codec/Encoder/Video
Rank – primary
Plugin – x264
Package – GStreamer Ugly Plug-ins
Pad Templates
sink
video/x-raw:
framerate: [ 0/1, 2147483647/1 ]
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
format: { Y444, Y42B, I420, YV12, NV12, GRAY8, Y444_10LE, I422_10LE, I420_10LE }
src
video/x-h264:
framerate: [ 0/1, 2147483647/1 ]
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
stream-format: { (string)avc, (string)byte-stream }
alignment: au
profile: { (string)high-4:4:4, (string)high-4:2:2, (string)high-10, (string)high, (string)main, (string)baseline, (string)constrained-baseline, (string)high-4:4:4-intra, (string)high-4:2:2-intra, (string)high-10-intra }
Properties
analyse
“analyse” GstX264EncAnalyse *
Partitions to consider
Flags : Read / Write
Default value : (none)
b-adapt
“b-adapt” gboolean
Automatically decide how many B-frames to use
Flags : Read / Write
Default value : true
b-pyramid
“b-pyramid” gboolean
Keep some B-frames as references
Flags : Read / Write
Default value : false
byte-stream
“byte-stream” gboolean
Generate byte stream format of NALU
Flags : Read / Write
Default value : false
frame-packing
“frame-packing” GstX264EncFramePacking *
Set frame packing mode for Stereoscopic content
Flags : Read / Write
Default value : auto (-1)
intra-refresh
“intra-refresh” gboolean
Use Periodic Intra Refresh instead of IDR frames
Flags : Read / Write
Default value : false
ip-factor
“ip-factor” gfloat
Quantizer factor between I- and P-frames
Flags : Read / Write
Default value : 1.4
key-int-max
“key-int-max” guint
Maximal distance between two key-frames (0 for automatic)
Flags : Read / Write
Default value : 0
me
“me” GstX264EncMe *
Integer pixel motion estimation method
Flags : Read / Write
Default value : hex (1)
multipass-cache-file
“multipass-cache-file” gchararray
Filename for multipass cache file
Flags : Read / Write
Default value : x264.log
noise-reduction
“noise-reduction” guint
Noise reduction strength
Flags : Read / Write
Default value : 0
option-string
“option-string” gchararray
String of x264 options (overridden by element properties) in the format "key1=value1:key2=value2".
Flags : Read / Write
pb-factor
“pb-factor” gfloat
Quantizer factor between P- and B-frames
Flags : Read / Write
Default value : 1.3
psy-tune
“psy-tune” GstX264EncPsyTune *
Preset name for psychovisual tuning options
Flags : Read / Write
Default value : none (0)
qp-step
“qp-step” guint
Maximum quantizer difference between frames
Flags : Read / Write
Default value : 4
quantizer
“quantizer” guint
Constant quantizer or quality to apply
Flags : Read / Write
Default value : 21
rc-lookahead
“rc-lookahead” gint
Number of frames for frametype lookahead
Flags : Read / Write
Default value : 40
sliced-threads
“sliced-threads” gboolean
Low latency but lower efficiency threading
Flags : Read / Write
Default value : false
speed-preset
“speed-preset” GstX264EncPreset *
Preset name for speed/quality tradeoff options (can affect decode compatibility - impose restrictions separately for your target decoder)
Flags : Read / Write
Default value : medium (6)
subme
“subme” guint
Subpixel motion estimation and partition decision quality: 1=fast, 10=best
Flags : Read / Write
Default value : 1
sync-lookahead
“sync-lookahead” gint
Number of buffer frames for threaded lookahead (-1 for automatic)
Flags : Read / Write
Default value : -1
threads
“threads” guint
Number of threads used by the codec (0 for automatic)
Flags : Read / Write
Default value : 0
trellis
“trellis” gboolean
Enable trellis searched quantization
Flags : Read / Write
Default value : true
tune
“tune” GstX264EncTune *
Preset name for non-psychovisual tuning options
Flags : Read / Write
Default value : (none)
vbv-buf-capacity
“vbv-buf-capacity” guint
Size of the VBV buffer in milliseconds
Flags : Read / Write
Default value : 600
weightb
“weightb” gboolean
Weighted prediction for B-frames
Flags : Read / Write
Default value : false
Named constants
GstX264EncAnalyse
Members
i4x4 (0x00000001) – i4x4
i8x8 (0x00000002) – i8x8
p8x8 (0x00000010) – p8x8
p4x4 (0x00000020) – p4x4
b8x8 (0x00000100) – b8x8
GstX264EncFramePacking
Members
auto (-1) – Automatic (use incoming video information)
checkerboard (0) – checkerboard - Left and Right pixels alternate in a checkerboard pattern
column-interleaved (1) – column interleaved - Alternating pixel columns represent Left and Right views
row-interleaved (2) – row interleaved - Alternating pixel rows represent Left and Right views
side-by-side (3) – side by side - The left half of the frame contains the Left eye view, the right half the Right eye view
top-bottom (4) – top bottom - L is on top, R on bottom
frame-interleaved (5) – frame interleaved - Each frame contains either Left or Right view alternately
GstX264EncMe
Members
dia (0) – dia
hex (1) – hex
umh (2) – umh
esa (3) – esa
tesa (4) – tesa
GstX264EncPass
Members
cbr (0) – Constant Bitrate Encoding
quant (4) – Constant Quantizer
qual (5) – Constant Quality
pass1 (17) – VBR Encoding - Pass 1
pass2 (18) – VBR Encoding - Pass 2
pass3 (19) – VBR Encoding - Pass 3
GstX264EncPreset
Members
None (0) – No preset
ultrafast (1) – ultrafast
superfast (2) – superfast
veryfast (3) – veryfast
faster (4) – faster
fast (5) – fast
medium (6) – medium
slow (7) – slow
slower (8) – slower
veryslow (9) – veryslow
placebo (10) – placebo
GstX264EncPsyTune
Members
none (0) – No tuning
film (1) – Film
animation (2) – Animation
grain (3) – Grain
psnr (4) – PSNR
ssim (5) – SSIM
GstX264EncTune
Members
stillimage (0x00000001) – Still image
fastdecode (0x00000002) – Fast decode
zerolatency (0x00000004) – Zero latency
The results of the search are