本文详细介绍了GStreamer在多媒体处理、播放、录制、显示等领域的应用技术，包括视频和音频的叠加、过渡、时间覆盖、寻求等功能，以及如何使用Fakesink和CapsFilter进行特定需求的处理。
Player
AVI (xvid, mp3)
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux name=demux demux.audio_00 ! mad ! audioconvert !audioresample ! autoaudiosink demux.video_00 ! queue ! xviddec !ffmpegcolorspace ! videoscale ! autovideosink
Time Overlay
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux name=demux demux.audio_00 ! mad ! alsasink demux.video_00 !queue ! xviddec ! ffmpegcolorspace ! timeoverlay ! xvimagesink
With Seeking
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux name=demux demux.audio_00 ! mad ! alsasink demux.video_00 !queue ! xviddec ! ffmpegcolorspace ! progressreport ! navseekseek-offset=10 ! timeoverlay ! xvimagesink
Video Transition
gst-launch-v videotestsrc pattern=1 ! smpte name=s border=20000 type=234duration=2000000000 ! ffmpegcolorspace ! ximagesink videotestsrc ! s.
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! ffmpegcolorspace ! smpte name=s border=20000type=234 duration=2000000000 ! ffmpegcolorspace ! xvimagesink filesrclocation=/MediaSamples/movies/AeonFlux/aeon2.avi ! avidemux ! xviddec !s.
Overlay
gst-launch filesrclocation=/home/magpie/sample-multimedia/wowintro2.avi ! avidemuxname=demux demux.audio_00 ! mad ! alsasink demux.video_00 ! queue !xviddec ! ffmpegcolorspace ! timeoverlay ! xvimagesink
Multi Video
gst-launch filesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=320 ! videobox border-alpha=0 alpha=1 top=-10 bottom=0 left=-150! videomixer name=mix ! ffmpegcolorspace ! xvimagesink filesrclocation=/home/magpie/sample-multimedia/texas.avi ! avidemux ! xviddec! ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=640 ! alphaalpha=1 ! mix.
gst-launch filesrclocation=/home/magpie/sample-multimedia/wowintro2.avi ! avidemux !xviddec ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=320 ! videobox border-alpha=0 alpha=0.5 top=-10 bottom=0 left=-150 !videomixer name=mix ! ffmpegcolorspace ! ffenc_mpeg4 ! avimux !filesink location=test01.avi filesrclocation=/MediaSamples/movies/wowintro2.avi ! avidemux ! xviddec !ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=640 ! alphaalpha=1 ! mix.
Slide Show
multifilesrclocation=image-%05d.jpg num-buffers=25 ! image/jpeg,framerate=25/1 ! jpegdec ! videoflip method=vertical-flip ! jpegenc ! multifilesinklocation=image-out-%05d.jpg
Fakesink and capsfilter
gst-luanchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! videoscale ! "video/x-raw-rgb, width=176,height=144" ! ffmpegcolorspace ! videorate ! "video/x-raw-rgb, bpp=32,depth=32, framerate=3/1" ! fakesink
COMF Player gstreamer link
If NOT use fakesink
gst-launch filesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! videoscale ! video/x-raw-yuv ! ffmpegcolorspace !videobalance ! videorate ! video/x-raw-yuv, width=320, framerate=25/1 ! xvimagesink
gst-launch filesrclocation=/home/magpie/sample-multimedia/wowintro2.avi ! avidemux !xviddec ! videoscale ! video/x-raw-yuv ! ffmpegcolorspace ! xvimagesink
For target MARU 0.2
gst-launch filesrc location=./wow_qcif.avi ! avidemux ! ffdec_mpeg4 ! videoscale !video/x-raw-yuv, width=320, height=240 ! ffmpegcolorspace ! ximagesink
gst-launch filesrc location=./wow_qcif.avi ! avidemux ! ffdec_mpeg4 ! videoscale !video/x-raw-yuv, width=640, height=480 ! ffmpegcolorspace ! videorate !ximagesink
gst-launch filesrc location=./wow_qcif.avi !avidemux name=demux demux.audio_00 ! mad ! audioconvert !audioresample ! autoaudiosink demux.video_00 ! queue ! ffdec_mpeg4 !videoscale ! video/x-raw-rgb, width=640, height=480 ! ffmpegcolorspace! ximagesink
gst-launch filesrc location=./wow_qcif.avi !avidemux name=demux demux.audio_00 ! mad ! audioconvert !audioresample ! autoaudiosink demux.video_00 ! queue ! ffdec_mpeg4 !videoscale ! video/x-raw-yuv, width=640 ! ffmpegcolorspace ! ximagesink
gst-launch playbin uri=file:///opt/cosmos/sample-multimedia/zippel.mp4
gst-launch playbin uri=file:///opt/cosmos/sample-multimedia/wowintro2.avi -v
gst-launch playbin uri=file:///opt/cosmos/sample-multimedia/wow_qcif.avi -v
? Above italic text means that Player use Playbin pipeline
If DO use fakesink
gst-launch filesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! videoscale ! video/x-raw-rgb ! ffmpegcolorspace !videorate ! video/x-raw-rgb, width=320, height=240, framerate=25/1, bpp=32, depth=32, red_mask=0x0000ff00, blue_mask=0xff000000,alpha_mask=0x000000ff ! fakesink -v
Recorder
Example link element for recording
gst-launch v4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1 ! xvimagesink
gst-launchv4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1 !ffmpegcolorspace ! tee ! queue ! video/x-raw-rgb ! ximagesink
gst-launchv4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1,bpp=16, depth=16 ! ffmpegcolorspace ! tee ! queue ! video/x-raw-rgb !ximagesink
Fakesink
gst-launch v4lsrc ! video/x-raw-yuv,width=320, height=240, framerate=25/1, bpp=16, depth=16 !ffmpegcolorspace ! tee ! queue ! video/x-raw-rgb, bpp=32, depth=32,red_mask=0x0000ff00, blue_mask=0xff000000, alpha_mask=0x000000ff,framerate=25/1 ! fakesink -v
Link element in COMF Recorder
COMF_RECORDING_TYPE_MP3_DIVX_AVI :: COMF_RECORDING_TYPE_MP3_XVID_AVI
To display
v4lsrc ! capsfilter (input-filter) ! ffmpegcolorspace ! tee ! queue ! capsfilter (fake-filter) ! fakesink
v4lsrc ! capsfilter (input-filter) ! ffmpegcolorspace ! tee ! queue ! ximagesink
gst-launchv4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1,bpp=16, depth=16 ! ffmpegcolorspace ! tee ! queue ! capsfilter(fake-filter) ! fakesink
gst-launch v4lsrc ! video/x-raw-yuv,width=320, height=240, framerate=25/1, bpp=16, depth=16 !ffmpegcolorspace ! tee ! queue ! ximagesink
To record (filesink)
DI
AVI (xvid, mp3)
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux name=demux demux.audio_00 ! mad ! audioconvert !audioresample ! autoaudiosink demux.video_00 ! queue ! xviddec !ffmpegcolorspace ! videoscale ! autovideosink
Time Overlay
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux name=demux demux.audio_00 ! mad ! alsasink demux.video_00 !queue ! xviddec ! ffmpegcolorspace ! timeoverlay ! xvimagesink
With Seeking
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux name=demux demux.audio_00 ! mad ! alsasink demux.video_00 !queue ! xviddec ! ffmpegcolorspace ! progressreport ! navseekseek-offset=10 ! timeoverlay ! xvimagesink
Video Transition
gst-launch-v videotestsrc pattern=1 ! smpte name=s border=20000 type=234duration=2000000000 ! ffmpegcolorspace ! ximagesink videotestsrc ! s.
gst-launchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! ffmpegcolorspace ! smpte name=s border=20000type=234 duration=2000000000 ! ffmpegcolorspace ! xvimagesink filesrclocation=/MediaSamples/movies/AeonFlux/aeon2.avi ! avidemux ! xviddec !s.
Overlay
gst-launch filesrclocation=/home/magpie/sample-multimedia/wowintro2.avi ! avidemuxname=demux demux.audio_00 ! mad ! alsasink demux.video_00 ! queue !xviddec ! ffmpegcolorspace ! timeoverlay ! xvimagesink
Multi Video
gst-launch filesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=320 ! videobox border-alpha=0 alpha=1 top=-10 bottom=0 left=-150! videomixer name=mix ! ffmpegcolorspace ! xvimagesink filesrclocation=/home/magpie/sample-multimedia/texas.avi ! avidemux ! xviddec! ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=640 ! alphaalpha=1 ! mix.
gst-launch filesrclocation=/home/magpie/sample-multimedia/wowintro2.avi ! avidemux !xviddec ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=320 ! videobox border-alpha=0 alpha=0.5 top=-10 bottom=0 left=-150 !videomixer name=mix ! ffmpegcolorspace ! ffenc_mpeg4 ! avimux !filesink location=test01.avi filesrclocation=/MediaSamples/movies/wowintro2.avi ! avidemux ! xviddec !ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=640 ! alphaalpha=1 ! mix.
Slide Show
multifilesrclocation=image-%05d.jpg num-buffers=25 ! image/jpeg,framerate=25/1 ! jpegdec ! videoflip method=vertical-flip ! jpegenc ! multifilesinklocation=image-out-%05d.jpg
Fakesink and capsfilter
gst-luanchfilesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! videoscale ! "video/x-raw-rgb, width=176,height=144" ! ffmpegcolorspace ! videorate ! "video/x-raw-rgb, bpp=32,depth=32, framerate=3/1" ! fakesink
COMF Player gstreamer link
If NOT use fakesink
gst-launch filesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! videoscale ! video/x-raw-yuv ! ffmpegcolorspace !videobalance ! videorate ! video/x-raw-yuv, width=320, framerate=25/1 ! xvimagesink
gst-launch filesrclocation=/home/magpie/sample-multimedia/wowintro2.avi ! avidemux !xviddec ! videoscale ! video/x-raw-yuv ! ffmpegcolorspace ! xvimagesink
For target MARU 0.2
gst-launch filesrc location=./wow_qcif.avi ! avidemux ! ffdec_mpeg4 ! videoscale !video/x-raw-yuv, width=320, height=240 ! ffmpegcolorspace ! ximagesink
gst-launch filesrc location=./wow_qcif.avi ! avidemux ! ffdec_mpeg4 ! videoscale !video/x-raw-yuv, width=640, height=480 ! ffmpegcolorspace ! videorate !ximagesink
gst-launch filesrc location=./wow_qcif.avi !avidemux name=demux demux.audio_00 ! mad ! audioconvert !audioresample ! autoaudiosink demux.video_00 ! queue ! ffdec_mpeg4 !videoscale ! video/x-raw-rgb, width=640, height=480 ! ffmpegcolorspace! ximagesink
gst-launch filesrc location=./wow_qcif.avi !avidemux name=demux demux.audio_00 ! mad ! audioconvert !audioresample ! autoaudiosink demux.video_00 ! queue ! ffdec_mpeg4 !videoscale ! video/x-raw-yuv, width=640 ! ffmpegcolorspace ! ximagesink
gst-launch playbin uri=file:///opt/cosmos/sample-multimedia/zippel.mp4
gst-launch playbin uri=file:///opt/cosmos/sample-multimedia/wowintro2.avi -v
gst-launch playbin uri=file:///opt/cosmos/sample-multimedia/wow_qcif.avi -v
? Above italic text means that Player use Playbin pipeline
If DO use fakesink
gst-launch filesrc location=/home/magpie/sample-multimedia/wowintro2.avi !avidemux ! xviddec ! videoscale ! video/x-raw-rgb ! ffmpegcolorspace !videorate ! video/x-raw-rgb, width=320, height=240, framerate=25/1, bpp=32, depth=32, red_mask=0x0000ff00, blue_mask=0xff000000,alpha_mask=0x000000ff ! fakesink -v
Recorder
Example link element for recording
gst-launch v4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1 ! xvimagesink
gst-launchv4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1 !ffmpegcolorspace ! tee ! queue ! video/x-raw-rgb ! ximagesink
gst-launchv4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1,bpp=16, depth=16 ! ffmpegcolorspace ! tee ! queue ! video/x-raw-rgb !ximagesink
Fakesink
gst-launch v4lsrc ! video/x-raw-yuv,width=320, height=240, framerate=25/1, bpp=16, depth=16 !ffmpegcolorspace ! tee ! queue ! video/x-raw-rgb, bpp=32, depth=32,red_mask=0x0000ff00, blue_mask=0xff000000, alpha_mask=0x000000ff,framerate=25/1 ! fakesink -v
Link element in COMF Recorder
COMF_RECORDING_TYPE_MP3_DIVX_AVI :: COMF_RECORDING_TYPE_MP3_XVID_AVI
To display
v4lsrc ! capsfilter (input-filter) ! ffmpegcolorspace ! tee ! queue ! capsfilter (fake-filter) ! fakesink
v4lsrc ! capsfilter (input-filter) ! ffmpegcolorspace ! tee ! queue ! ximagesink
gst-launchv4lsrc ! video/x-raw-yuv, width=320, height=240, framerate=25/1,bpp=16, depth=16 ! ffmpegcolorspace ! tee ! queue ! capsfilter(fake-filter) ! fakesink
gst-launch v4lsrc ! video/x-raw-yuv,width=320, height=240, framerate=25/1, bpp=16, depth=16 !ffmpegcolorspace ! tee ! queue ! ximagesink
To record (filesink)
DI
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