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Properties
| GstPad * | active-pad | Read / Write |
| gboolean | cache-buffers | Read / Write |
| guint | n-pads | Read |
| GstInputSelectorSyncMode | sync-mode | Read / Write |
| gboolean | sync-streams | Read / Write |
Description
Direct one out of N input streams to the output pad.
The input pads are from a GstPad subclass and have additional properties, which users may find useful, namely:
"running-time": Running time of stream on pad (gint64)
"tags": The currently active tags on the pad (GstTagList, boxed type)
"active": If the pad is currently active (gboolean)
"always-ok" : Make an inactive pads return GST_FLOW_OK instead of GST_FLOW_NOT_LINKED
Synopsis
Element Information
plugin |
coreelements |
author |
Julien Moutte <julien@moutte.net>, Jan Schmidt <thaytan@mad.scientist.com>, Wim Taymans <wim.taymans@gmail.com> |
class |
Generic |
Property Details
The “cache-buffers” property
“cache-buffers” gboolean
If set to TRUE and GstInputSelector:sync-streams is also set to TRUE,
the active pad will cache the buffers still considered valid (after current
running time, see sync-mode) to avoid missing frames if/when the pad is
reactivated.
The active pad may push more buffers than what is currently displayed/consumed and when changing pads those buffers will be discarded and the only way to reactivate that pad without loosing the already consumed buffers is to enable cache.
Flags: Read / Write
Default value: FALSE
The “sync-mode” property
“sync-mode” GstInputSelectorSyncMode
Select how input-selector will sync buffers when in sync-streams mode.
Note that when using the "active-segment" mode, the "active-segment" may be ahead of current clock time when switching the active pad, as the current active pad may have pushed more buffers than what was displayed/consumed, which may cause delays and some missing buffers.
Flags: Read / Write
Default value: Sync using the current active segment
The “sync-streams” property
“sync-streams” gboolean
If set to TRUE all inactive streams will be synced to the
running time of the active stream or to the current clock.
To make sure no buffers are dropped by input-selector that might be needed when switching the active pad, sync-mode should be set to "clock" and cache-buffers to TRUE.
Flags: Read / Write
Default value: TRUE