Now I can record the video to a AVI file with mpeg4 encoding by : gst-launch v4l2src ! 'video/x-raw-yuv,width=320,height=240, framerate=30/1' ! ffmpegcolorspace ! ffenc_mpeg4 ! avimux ! filesink location=record.avi But I got two issues: 1: I want record as a MP4 file, I do it like this: gst-launch v4l2src ! 'video/x-raw-yuv,width=320,height=240, framerate=30/1' ! ffmpegcolorspace ! ffenc_mpeg4 ! mp4mux ! filesink location=record.avi I can record the video , but when I playback it by mplayer, I got a error: Playing ./record.mp4. libavformat file format detected. [mov,mp4,m4a,3gp,3g2,mj2 @ 0x8741640]moov atom not found LAVF_header: av_open_input_stream() failed ISO: File Type Major Brand: ISO/IEC 14496-1 (MPEG-4 system) v2 2: I want encode the video to H264, so I do like this: gst-launch v4l2src ! 'video/x-raw-yuv,width=320,height=240, framerate=30/1' ! ffmpegcolorspace ! x264enc ! avimux ! filesink location=record.avi But when I run the pipeline I just get the error info like this: Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error. Additional debug info: gstbasesrc.c(2550): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: streaming task paused, reason not-negotiated (-4) Execution ended after 1727716724 ns. Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... <div>Some one can help me fix the issues? Tks :) On 12/22/10, Timothy Braun <<a href="mailto:braunsquared@gmail.com">braunsquared@gmail.com</a>> wrote: > H264 is encoded with x264enc element. > > Sent from my iPhone > > On Dec 22, 2010, at 3:10 AM, wl2776 <<a href="mailto:wl2776@gmail.com">wl2776@gmail.com</a>> wrote: > >> >> >> michael young wrote: >>> >>> And now , I want to record the video to a MP4 file with the h264 encoding >>> format , How can I do ? >>> >>> On Wed, Dec 22, 2010 at 2:26 PM, michael <<a href="mailto:mcygogo@gmail.com">mcygogo@gmail.com</a>> wrote: >>> >>>> tks, this is work: gst-launch v4l2src device=/dev/video0 ! >>>> 'video/x-raw-yuv,width=640,height=480,framerate=30/1' ! xvimagesink >>> >>> >> >> Looks like you can't, because h264 encoder is unavailable. >> gst-inspect | grep h264 >> doesn't show it. >> However, general idea is to encode, then mux, and then save to a file. >> gst-launch v4l2src device=/dev/video0 ! >> 'video/x-raw-yuv,width=640,height=480,framerate=30/1' ! ffenc_mpeg4 ! >> mp4mux !filesink location=/home/user/file. >> >> -- >> View this message in context: >> <a href="http://gstreamer-devel.966125.n4.nabble.com/how-to-create-a-pipeline-to-record-video-from-camera-tp3134399p3160261.html">http://gstreamer-devel.966125.n4.nabble.com/how-to-create-a-pipeline-to-record-video-from-camera-tp3134399p3160261.html</a> >> Sent from the GStreamer-devel mailing list archive at Nabble.com. >> >> ------------------------------------------------------------------------------ >> Forrester recently released a report on the Return on Investment (ROI) of >> Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even >> within 7 months. Over 3 million businesses have gone Google with Google >> Apps: >> an online email calendar, and document program that's accessible from your >> >> browser. Read the Forrester report: <a href="http://p.sf.net/sfu/googleapps-sfnew">http://p.sf.net/sfu/googleapps-sfnew</a> >> _______________________________________________ >> gstreamer-devel mailing list >> <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> >> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> > > ------------------------------------------------------------------------------ > Forrester recently released a report on the Return on Investment (ROI) of > Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even > within 7 months. Over 3 million businesses have gone Google with Google > Apps: > an online email calendar, and document program that's accessible from your > browser. Read the Forrester report: <a href="http://p.sf.net/sfu/googleapps-sfnew">http://p.sf.net/sfu/googleapps-sfnew</a> > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> > <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> > </div>