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f0abd316e2
While in many cases it's desirable to wait for a buffer to be pushed
downstream when using appsrc-push, in some cases this is not possible as
such pushing action is dependent on following actions that would not be
executed if we wait.
An example for this is prerolling:
appsrc ! qtdemux ! video/x-h264 ! decodebin name=dec ! %(videosink)s
description, seek=false, handles-states=true
appsrc-push, target-element-name=appsrc0, file-name="raw_h264.0.mp4"
set-state, state=playing
appsrc-eos, target-element-name=appsrc0
In order for the preroll to occur, both the appsrc needs to push the
buffer and the state needs to reach PLAYING. But `set-state` cannot
finish if the buffer has not been pushed (the state transition does not
finish) and conversely pushing the buffer will not finish until the
state has reached.
Making appsrc-push not wait for the buffer solves this problem. This
patch makes appsrc-push aware of this issue by only waiting for the
buffer to be pushed if the pipeline is in a state that allows buffers to
flow.
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| .. | ||
| common@59cb678164 | ||
| data | ||
| docs | ||
| gst | ||
| gst-libs | ||
| launcher | ||
| pkgconfig | ||
| plugins | ||
| po | ||
| tests | ||
| tools | ||
| win32 | ||
| .gitignore | ||
| AUTHORS | ||
| autogen.sh | ||
| ChangeLog | ||
| configure.ac | ||
| COPYING | ||
| gst-validate.doap | ||
| Makefile.am | ||
| meson.build | ||
| NEWS | ||
| README | ||
| RELEASE | ||
== Gst-Validate The goal of GstValidate is to be able to detect when elements are not behaving as expected and report it to the user so he knows how things are supposed to work inside a GstPipeline. In the end, fixing issues found by the tool will ensure that all elements behave all together in the expected way. The easiest way of using GstValidate is to use one of its command-line tools, located at tools/ directory. It is also possible to monitor GstPipelines from any application by using the LD_PRELOAD gstvalidate lib. The third way of using it is to write your own application that links and uses libgstvalidate. == BUILDING Getting the code: Releases are available at <URL>, download and extract the tarball. If you want to use latest git version, do: git clone <URI> After cloning or extracting from a tarball, enter the gst-validate directory: cd gst-validate The 'master' branch uses gstreamer 1.0, there is a '0.10' branch for gstreamer 0.10. The default is the 'master' branch, if you want to use it for 0.10, do: git checkout --track origin/0.10 Build with: ./autogen.sh --prefix=<installation-prefix> make sudo make install (only if you want to install it) Replace <installation-prefix> with your desired installation path, you can omit the --prefix argument if you aren't going to install it or if you want the default /usr/local. It is possible to use gst-validate CLI tools without installation. == INSTRUCTIONS If you are looking for informations on how to use gst-validate -> docs/validate-usage.txt If you are looking for informations on gst-validate design -> docs/validate-design.txt