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Properties
| gchar * | location | Read / Write |
| guint64 | max-size-bytes | Read / Write |
| guint64 | max-size-time | Read / Write |
| gdouble | mux-overhead | Read / Write |
| GstElement * | muxer | Read / Write |
| GstElement * | sink | Read / Write |
| guint | max-files | Read / Write |
| gboolean | send-keyframe-requests | Read / Write |
| gchar * | max-size-timecode | Read / Write |
| guint64 | alignment-threshold | Read / Write |
| gboolean | use-robust-muxing | Read / Write |
Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBin ╰── GstSplitMuxSink
Description
This element wraps a muxer and a sink, and starts a new file when the mux contents are about to cross a threshold of maximum size of maximum time, splitting at video keyframe boundaries. Exactly one input video stream can be muxed, with as many accompanying audio and subtitle streams as desired.
By default, it uses mp4mux and filesink, but they can be changed via the 'muxer' and 'sink' properties.
The minimum file size is 1 GOP, however - so limits may be overrun if the distance between any 2 keyframes is larger than the limits.
If a video stream is available, the splitting process is driven by the video stream contents, and the video stream must contain closed GOPs for the output file parts to be played individually correctly. In the absence of a video stream, the first available stream is used as reference for synchronization.
Example pipelines
1 |
gst-launch-1.0 -e v4l2src num-buffers=500 ! video/x-raw,width=320,height=240 ! videoconvert ! queue ! timeoverlay ! x264enc key-int-max=10 ! h264parse ! splitmuxsink location=video%02d.mov max-size-time=10000000000 max-size-bytes=1000000 |
Synopsis
Element Information
plugin |
multifile |
author |
Jan Schmidt <jan@centricular.com> |
class |
Generic/Bin/Muxer |
Property Details
The “location” property
“location” gchar *
Format string pattern for the location of the files to write (e.g. video%05d.mp4).
Flags: Read / Write
Default value: NULL
The “max-size-bytes” property
“max-size-bytes” guint64
Max. amount of data per file (in bytes, 0=disable).
Flags: Read / Write
Default value: 0
The “max-size-time” property
“max-size-time” guint64
Max. amount of time per file (in ns, 0=disable).
Flags: Read / Write
Default value: 0
The “mux-overhead” property
“mux-overhead” gdouble
Extra size overhead of muxing (0.02 = 2%).
Flags: Read / Write
Allowed values: [0,1]
Default value: 0.02
The “muxer” property
“muxer” GstElement *
The muxer element to use (NULL = default mp4mux).
Flags: Read / Write
The “sink” property
“sink” GstElement *
The sink element (or element chain) to use (NULL = default filesink).
Flags: Read / Write
The “max-files” property
“max-files” guint
Maximum number of files to keep on disk. Once the maximum is reached,old files start to be deleted to make room for new ones.
Flags: Read / Write
Default value: 0
The “send-keyframe-requests” property
“send-keyframe-requests” gboolean
Request a keyframe every max-size-time ns to try splitting at that point. Needs max-size-bytes to be 0 in order to be effective.
Flags: Read / Write
Default value: FALSE
The “max-size-timecode” property
“max-size-timecode” gchar *
Maximum difference in timecode between first and last frame. Separator is assumed to be ":" everywhere (e.g. 01:00:00:00). Will only be effective if a timecode track is present.
Flags: Read / Write
Default value: NULL
The “alignment-threshold” property
“alignment-threshold” guint64
Allow non-reference streams to be that many ns before the reference stream.
Flags: Read / Write
Default value: 0
The “use-robust-muxing” property
“use-robust-muxing” gboolean
Check if muxers support robust muxing via the reserved-max-duration and reserved-duration-remaining properties and use them if so. (Only present on qtmux and mp4mux for now). splitmuxsink may then also create new fragments if the reserved header space is about to overflow. Note this does not set reserved-moov-update-period - apps should do that manually.
Flags: Read / Write
Default value: FALSE
Signal Details
The “format-location” signal
gchar* user_function (GstSplitMuxSink *splitmux, guint fragment_id, gpointer user_data)
Parameters
splitmux |
the GstSplitMuxSink |
|
fragment_id |
the sequence number of the file to be created |
|
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
The “format-location-full” signal
gchar* user_function (GstSplitMuxSink *splitmux, guint fragment_id, GstSample *first_sample, gpointer user_data)
Parameters
splitmux |
the GstSplitMuxSink |
|
fragment_id |
the sequence number of the file to be created |
|
first_sample |
A GstSample containing the first buffer from the reference stream in the new file |
|
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
The “split-now” signal
void user_function (GstSplitMuxSink *splitmux, gpointer user_data)
When called by the user, this action signal splits the video file (and begins a new one) immediately.
Parameters
splitmux |
the GstSplitMuxSink |
|
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 1.14