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Revision as of 16:15, 6 October 2009 by Prenos (talk | contribs)
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At your command line (after accessing linux):

(make sure FS is rw)
<source lang="bash"> mount -o remount,rw / gst-launch camsrc ! palmvideoencoder ! filesink location=/media/internal/downloads/foo.mts mount -o remount,ro / </source> - No GUI
- No sound (need a muxer plugin? verify alsasrc works)
- Frame rate seemed pretty decent too.
- Video is H.264 at 480x320.
- Image is rotated 90 degrees CCW

other useful gstreamer commands:

gst-inspect (shows list of sources to pipe through, mostly decoders/demuxers) <source lang="text"> root@castle:/var/home/ccrook# gst-inspect palmvideodecoder: palmvideodecoder: palmvideodecoder palmaudiodecoder: palmaudiodecoder: palmaudiodecoder wavparse: wavparse: WAV audio demuxer wavenc: wavenc: WAV audio muxer udp: udpsink: UDP packet sender udp: multiudpsink: UDP packet sender udp: dynudpsink: UDP packet sender udp: udpsrc: UDP packet receiver typefindfunctions: application/x-id3v2: mp3, mp2, mp1, mpga, ogg, flac, tta typefindfunctions: application/x-id3v1: mp3, mp2, mp1, mpga, ogg, flac, tta typefindfunctions: audio/mpeg: mp3, mp2, mp1, mpga typefindfunctions: video/mpeg4: m4v typefindfunctions: audio/x-m4a: m4a typefindfunctions: application/x-3gp: 3gp typefindfunctions: video/quicktime: mov typefindfunctions: audio/x-wav: wav typefindfunctions: adts_mpeg_stream: aac typefindfunctions: audio/x-amr-nb-sh: amr typefindfunctions: audio/x-amr-wb-sh: amr rtsp: rtspsrc: RTSP packet receiver rtsp: rtpdec: RTP Decoder rtsp: rtspgoogle: Google RTSP Extension gstrtpmanager: gstrtpbin: RTP Bin gstrtpmanager: gstrtpclient: RTP Client gstrtpmanager: gstrtpjitterbuffer: RTP packet jitter-buffer gstrtpmanager: gstrtpptdemux: RTP Demux gstrtpmanager: gstrtpsession: RTP Session gstrtpmanager: gstrtpssrcdemux: RTP SSRC Demux rtp: rtpdepay: RTP depayloader rtp: rtpac3depay: RTP packet depayloader rtp: rtpdvdepay: RTP DV Depayloader rtp: rtpdvpay: RTP DV Payloader rtp: rtpilbcpay: RTP Payloader for iLBC Audio rtp: rtpilbcdepay: RTP iLBC packet depayloader rtp: rtpg726depay: RTP packet depayloader rtp: rtpg726pay: RTP packet payloader rtp: rtpg729depay: RTP packet depayloader rtp: rtpg729pay: RTP Payloader for G729 Audio rtp: rtpgsmdepay: RTP packet depayloader rtp: rtpgsmpay: RTP GSM audio payloader rtp: rtpamrdepay: RTP packet depayloader rtp: rtpamrpay: RTP packet payloader rtp: rtppcmadepay: RTP packet depayloader rtp: rtppcmudepay: RTP packet depayloader rtp: rtppcmupay: RTP packet payloader rtp: rtppcmapay: RTP packet payloader rtp: rtpmpadepay: RTP packet depayloader rtp: rtpmpapay: RTP packet payloader rtp: rtpmpvdepay: RTP packet depayloader rtp: rtpmpvpay: RTP MPEG2 ES video payloader rtp: rtph263ppay: RTP packet payloader rtp: rtph263pdepay: RTP packet depayloader rtp: rtph263depay: RTP H263 packet depayloader rtp: rtph263pay: RTP packet payloader rtp: rtph264depay: RTP packet depayloader rtp: rtph264pay: RTP packet payloader rtp: rtpL16pay: RTP packet payloader rtp: rtpL16depay: RTP packet depayloader rtp: asteriskh263: RTP packet parser rtp: rtpmp1sdepay: RTP packet depayloader rtp: rtpmp2tdepay: RTP packet depayloader rtp: rtpmp2tpay: RTP MP2T audio payloader rtp: rtpmp4vpay: RTP MPEG-4 Video packet payloader rtp: rtpmp4vdepay: RTP packet depayloader rtp: rtpmp4apay: RTP packet payloader rtp: rtpmp4adepay: RTP packet parser rtp: rtpmp4gdepay: RTP packet depayloader rtp: rtpmp4gpay: RTP packet payloader rtp: rtpspeexpay: RTP packet payloader rtp: rtpspeexdepay: RTP packet depayloader rtp: rtpsv3vdepay: RTP packet depayloader rtp: rtptheoradepay: RTP packet depayloader rtp: rtptheorapay: RTP packet depayloader rtp: rtpvorbisdepay: RTP packet depayloader rtp: rtpvorbispay: RTP packet depayloader rtp: rtpvrawdepay: RTP packet depayloader rtp: rtpvrawpay: RTP packet payloader queue2: queue2: Queue quicktime: qtdemux: QuickTime demuxer quicktime: rtpxqtdepay: RTP packet depayloader playback: playbin: Player Bin playback: playbin2: Player Bin 2 mulaw: mulawenc: Mu Law audio encoder mulaw: mulawdec: Mu Law audio decoder mobirtspsrc: mobirtspsrc: MobiRtspSrc ffmpeg: ffdec_alac: FFMPEG ALAC (Apple Lossless Audio Codec) decoder ffmpeg: ffdec_qcelp: FFMPEG QCELP / PureVoice decoder ffmpeg: ffdeinterlace: FFMPEG Deinterlace element ffmpeg: ffaudioresample: FFMPEG Audio resampling element uridecodebin: decodebin2: Decoder Bin uridecodebin: uridecodebin: URI Decoder decodebin: decodebin: Decoder Bin coreindexers: memindex: A index that stores entries in memory coreelements: capsfilter: CapsFilter coreelements: fakesrc: Fake Source coreelements: fakesink: Fake Sink coreelements: fdsrc: Filedescriptor Source coreelements: fdsink: Filedescriptor Sink coreelements: filesrc: File Source coreelements: identity: Identity coreelements: queue: Queue coreelements: filesink: File Sink coreelements: tee: Tee pipe fitting coreelements: typefind: TypeFind coreelements: multiqueue: MultiQueue video4linux2: camsrc: Video (video4linux2/raw) Source avi: avidemux: Avi demuxer avi: avimux: Avi muxer avi: avisubtitle: Avi subtitle parser audiotestsrc: audiotestsrc: Audio test source audiorate: audiorate: Audio rate adjuster audioconvert: audioconvert: Audio converter alsa: alsamixer: Alsa mixer alsa: alsasrc: Audio source (ALSA) alsa: alsasink: Audio sink (ALSA) alaw: alawenc: A Law audio encoder alaw: alawdec: A Law audio decoder palmvideosink: palmvideosink: palmvideosink palmvideoencoder: palmvideoencoder: palmvideoencoder palmqcelpdemux: palmqcelpdemux: palmqcelpdemux palmqcelpdemux: audio/x-gst-fourcc-sqcp: no extensions palmmp3demux: palmmp3demux: palmmp3demux palmjpegencfilesink: palmjpegencfilesink: palmjpegencfilesink palmhttpsrc: palmhttpsrc: Palm HTTP Source Element palmamrdemux: palmamrdemux: palmamrdemux adpcmdecoder: palmadpcmdecoder: ADPCM Decoder palmaacdemux: palmaacdemux: palmaacdemux staticelements: bin: Generic bin staticelements: pipeline: Pipeline object

Total count: 36 plugins, 129 features </source>

Additional reference from XO Laptop site:

Currently looking at ways to use the camera preview pipe as a method of video recording through the WebOS GUI by diverting it to the filesystem.

File of interest: /usr/lib/luna/luna-media/palmInitMedia.js

More on the camera module:

Relies on Prelease for launching shell scripts. Use Flashlight App! to install it before attempting to run.
Currently stop button doesn't work.

Note: Current versions of Prelease available through webOS QuickInstall and Preware no longer support the exploit to pass abritrary code, so this shouldn't work --Prenos 16:59, 9 September 2009 (UTC)


1.) Figure out proper way to freevideosink via a homebrew app (killing gst-launch properly) (probably will involve invoking a custom service)
UPDATE: sending an INT signal seems to work? not sure if I'm missing something here... --Prenos 15:14, 6 October 2009 (UTC) 2.) Mux in sound from alsasrc

"gst-launch alsasrc ! alsasink" will give you sound from the mic playing back through the speakers, verifying alsasrc. It quickly loses resolution though, and starts giving "can't keep up with audio source" errors. --Zinge 08:23, 7 August 2009 (UTC)
"gst-launch alsasrc ! wavenc ! filesink location=/media/internal/downloads/test.wav" will record audio no problem. --Cpcrook 17:36, 7 August 2009 (UTC)
"gst-launch camsrc ! palmvideoencoder ! avimux name=mux ! filesink location=/media/internal/downloads/foo.mts alsasrc ! mulawenc ! mux." will mux audio and video, though the timing was a bit off when I played it back. --Muchtall 18:15, 7 August 2009 (UTC)

3.) Implement preview screen (possibility: send video through palmvideosink, then to palmvideoencoder so its still accessible for preview?) UPDATE: this seems semi-posible, as there are supported gstreamer elements that could "tee" the pipeline to 2 locations, unfortunately a custom app using palmvideosink seems unlikely as it's locked up in MediaServer --Prenos 15:14, 6 October 2009 (UTC)

4.) Get Videos app to display recorded video files (if anyone knows why the doesn't work now, please add it here, because it should work but it doesn't)
UPDATE: This definitely SHOULDN'T work. You're piping a RAW h264 bitstream to a file with no container. Honestly I'm suprised it plays back in totem/smplayer. My only guess is they somehow contain them during stream. I'm working on backporting qtmux, as it's the only viable solution I've come up with that would be compatible with Pre's environment --Prenos 15:14, 6 October 2009 (UTC) 5.) Video conferencing via UDPsink?
UPDATE: I'm thinking theoraenc and net2stream to an icecast server. 2 way probably isn't possible, i suppose this would be more 'http video streaming' than conferencing --Prenos 15:14, 6 October 2009 (UTC) 6.) Get 720x480@30fps working (TI claims this is possible with the current hardware). This seems to require recompiling camsrc with palm's 'capabilities template' removed or adjusted(palm offers both the base v4l2 drivers as well as their patch to compile the camsrc plugin on their opensource website). There's also a comment in palmInitMedia.js that the driver only supports up to 480x320, but v4l2 is documented to handle higher resolutions. Will also requre installing another video encoder. --Prenos 20:10, 27 August 2009 (UTC) UPDATE: this seems to be infeasble due to memory limitations, tons of segfaults and things. might have to do some serious buffering and framerate adjustments to get this to work. Will try with more efficient encoders --Prenos 15:14, 6 October 2009 (UTC)