Changes between Initial Version and Version 1 of Yocto/gstreamer/multimedia

Timestamp:

10/22/2017 05:28:45 AM (8 years ago)

Author:

trac

Comment:

--

Yocto/gstreamer/multimedia

@@ +1 @@
+[[PageOutline]]
+
+[=#audio-and-video]
+= Video and Audio =
+Playback of combined video and audio is a bit more complicated as now you need to utilize parsers, named elements to split the audio and video paths, and queues to avoid single-threaded blocking.
+
+The following pipeline examples utilize plugins from the the Freescale gst-fsl-plugin package on GStreamer 0.10.
+
+gst-fsl-plugin elements used:
+ * Parsers / Demuxers:
+  * '''aiurdemux''' - parse and identify source stream formats
+
+Example using Big Buck Bunney H.264 (MOV H264 video, AAC suuround sound):
+{{{
+gst-launch filesrc location=/media/sda1/big_buck_bunny_1080p_h264.mov typefind=true ! aiurdemux name=d ! \
+  queue2 ! beepdec ! alsasink d. ! \
+  queue2 ! vpudec ! mfw_v4lsink device=/dev/video16
+}}}
+
+
+== GStreamer '''playbin2''' and '''decodebin2''' elements ==
+GStreamer has some '''bin''' elements that try to 'autoplug' other elements together by inspecting the pipeline.
+
+The '''decodebin2''' element will try to figure out the proper decoder pipeline for the sink specified:
+{{{
+gst-launch filesrc location=/media/sda1/big_buck_bunny_720p_surround.avi ! \
+  decodebin2 ! mfw_v4lsink device=/dev/video16
+}}}
+
+There is also '''playbin2''' which just needs to be given a source and a sink
+{{{
+gst-launch playbin2 uri=file:///home/root/hawaii.mp4 \
+  video-sink="mfw_v4lsink device=/dev/video16"
+}}}
+
+Note that these 'bin' elements may not always do what you want or expect (they may not use hardware decode for example).
+
+
+== Freescale gplay ==
+Or if simplicity is required, the Freescale GStreamer based '''gplay''' app will try to determine the file type and play it back as best as it can.
+{{{
+gplay /media/sda1/big_buck_bunny.mov
+}}}