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GStreamer as multimedia framework in Android: a new alternative
GStreamer as multimedia framework in Android: a new alternative
uridecobin optimizations
uridecobin optimizations
U671X-based phones in mass production
U671X-based phones in mass production
U671X-based phones in mass production
U671X-based phones in mass production
U671X-based phones in mass production
U671X-based phones in mass production
U671X-based phones in mass production
U671X-based phones in mass production
Questions and Answers
Questions and Answers
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GStreamer as multimedia framework in Android: a new alternative

содержание презентации «GStreamer as multimedia framework in Android: a new alternative.ppt»
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1GStreamer as multimedia framework in 9accelerated plugins. Only a limited number
Android: a new alternative. CELF Embedded of codec supported in Android: Video:
Linux Conference Europe 2010 Benjamin MPEG4, H263, H264 Audio: AMR NB, AMR WB,
Gaignard October 27, 2010. AAC-LC Only one muxer required to handle
2Context. ST-Ericsson U671X Android all recording formats: gppmux v4l2src
platform on ARM9 @ 416 MHz with video, isn’t use as video source: Android Camera
audio and graphics dedicated hardware class provide the video frames. 9. October
accelerators. Multimedia hardware 27, 2010.
capabilities: Video encode and decode 10MetadataRetriever services. Thumbnail
Audio encode and decode Graphics Imaging generation for video files uses hardware
Camera Linux kernel 2.6.29 GStreamer accelerator for video decoding and color
0.10.26. 2. October 27, 2010. space conversion (YUV2RGB). Android
3GStreamer in Android: why ? GStreamer metadata tags are mapped to GStreamer tags
is a mature multimedia framework. to extract: codec, bit rate, album art,
GStreamer is a flexible framework. ... Remove OpenCore implementation from
GStreamer is supported by an active Android MediaScanner class =>
community. ST-Ericsson U671X platform was everything is done by GStreamer. Use a
developed and matured since years using simpler graph than playbin2 for better
GStreamer as multimedia framework with performance and without cpu/mem heavy
success. GStreamer is required by most of cost. uridecodebin uri=%s ! icbtransform !
Linux framework: MEEGO, Ubuntu GStreamer appsink caps="video/x-raw-rgb,bpp=16”
graph based approach is naturally fitting Only video is decoded (not audio) for
U671X hardware split (1 GStreamer element thumbnail generation. 10. October 27,
for 1 HW block). 3. October 27, 2010. 2010.
4GStreamer to handle what ? Multimedia 11uridecobin optimizations. For
playback: audio/video streams from local thumbnails generation we don’t need to
storage, streaming or progressive decode audio stream, we use uridecodebin’s
download. Multimedia recording: Camera “autoplug-continue” callback to limit
application, Sound Recorder. Metadata graph building. 11. October 27, 2010.
retrieving: audio/video tags, bitrates, 12uridecobin optimizations (2). For
codec information, thumbnails generation. metadata retrieving use the same technique
Constraints: Do not touch to Android java but don’t graph video too. It saves time
APIs Follow Android versions (cupcake, at graph building, reduce memory usage,
donut, ?clair …) Respect internal Android don’t use any hardware resource. 12.
APIs. 4. October 27, 2010. October 27, 2010.
5GStreamer replace OpenCore. 5. October 13How to cope with Android licensing.
27, 2010. Android is under APACHE license. GStreamer
6GStreamer replace OpenCore. 6. October is under LGPL v2.1 license. The wrapper
27, 2010. between Android multimedia library and
7Porting GStreamer on Android, what are GStreamer is under ST-Ericsson copyright
the difficulties ? Android isn’t built and is dedicated to U671X hardware
from classical Linux way (no pkg-config, platform. GStreamer libraries are
no configure, no makefile…) it is required dynamically linked in Android framework.
to adapt GStreamer build process to Add NOTICE files in GStreamer to match
Android one. Glib isn’t provided natively with Android build process. 13. October
by Android, need to add it. All of this 27, 2010.
have required to rewrite +70 Android 14Improvements done in GStreamer with
makefiles (.mk) … but it was also an Collabora Multimedia support. avidemux and
opportunity to carefully select the qtdemux parsing speed up and memory
embedded elements to optimize GStreamer consumption reduction. Add “push mode” to
memory foot print and speed. Today U671X avidemux, qtdemux and flvdemux. New RTSP
android platform embeds 273 elements split buffering mode to handle data burst on
in 39 GStreamer plugins. Only use dynamic mobile networks. queue2 ring buffer mode
libraries to not break GStreamer (LGPL) improvement. QoS message to detect
and Android (Apache) licenses terms. 7. framedrop. All those improvements (+
October 27, 2010. trivial bugs correction) have being
8MediaPlayer services. Playbin2 is used released under LGPLv2.0 and are now
to handle playback, streaming and available on GStreamer main stream. 14.
progressive download services Playbin2 has October 27, 2010.
been customized to reduce memory 15U671X-based phones in mass production.
consumption, with Collabora Multimedia ACER betouch E120. ACER betouch E110. ACER
partnership. Use 2 dedicated sinks for betouch E130. HTC Tianyi. 15. Enter date
audio and video rendering: Audio sink here.
requesting adaptation in Android 16Conclusion. With minimum effort,
AudioTrack class. Make match GStreamer GStreamer brings to Android: A full open
states (PAUSED, PLAYING …) and events source multimedia framework. Maturity.
(EOS, SEEK, ASYNC-DONE) to Android Additional codecs (VC1, DIVX…) and
MediaPlayer expected states and messages. demuxers (AVI, FLV…) Community support and
All the complexity to handle local reactivity. Performance. Evolution (future
playback, streaming or progressive codec, new streaming protocols, Video
download is hidden by playbin2. 8. October Telephony). 16. October 27, 2010.
27, 2010. 17Questions and Answers.
9MediaRecorder services. Use dedicated 18THANK YOU.
GStreamer pipeline with hardware
GStreamer as multimedia framework in Android: a new alternative.ppt
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GStreamer as multimedia framework in Android: a new alternative

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