[gst-devel] how to create a pipeline to record video from camera?
michael
mcygogo at gmail.com
Wed Dec 22 16:10:32 CET 2010
I have tested changing the muxer to qtmux, but it still not work
On Wed, Dec 22, 2010 at 10:58 PM, Timothy Braun <braunsquared at gmail.com>wrote:
> I was never able to get the ffmpeg mpeg4 mixer to work quite right. I found
> that mp4mux, an extension of qtmux, works much better. If you inspect the
> ffmpeg mp4 muxer they actually suggest that you use a different one as it's
> unstable.
>
> Best,
> Tim
>
> Sent from my iPhone
>
> On Dec 22, 2010, at 8:27 AM, michael <mcygogo at gmail.com> wrote:
>
> I just ran it :
> gst-launch -e v4l2src num-buffers=200 !
> video/x-raw-yuv,width=640,height=480,framerate=30/1 ! ffmpegcolorspace !
> ffenc_mpeg4 ! mp4mux ! filesink location=record.mp4
> And got a mp4 file , but it still cannot be playbacked, and give the error
> info:
> Playing record.mp4.
> libavformat file format detected.
> [mpeg4 @ 0x9376c10]hmm, seems the headers are not complete, trying to guess
> time_increment_bits
> [mpeg4 @ 0x9376c10]my guess is 5 bits ;)
> [mpeg4 @ 0x9376c10]looks like this file was encoded with
> (divx4/(old)xvid/opendivx) -> forcing low_delay flag
> [mpeg4 @ 0x9376c10]picture size invalid (0x0)
> [mpeg4 @ 0x9376c10]get_buffer() failed (-1 0 0 (nil))
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x9375640]Could not find codec parameters
> (Video: mpeg4, yuv420p)
> LAVF_header: av_find_stream_info() failed
> ISO: File Type Major Brand: ISO/IEC 14496-1 (MPEG-4 system) v2
> Quicktime/MOV file format detected.
> [mov] Video stream found, -vid 0
> VIDEO: [mp4v] 640x480 24bpp inf fps 0.0 kbps ( 0.0 kbyte/s)
> open: No such file or directory
> [MGA] Couldn't open: /dev/mga_vid
> open: No such file or directory
> [MGA] Couldn't open: /dev/mga_vid
> [VO_TDFXFB] Can't open /dev/fb0: Permission denied.
> [VO_3DFX] Unable to open /dev/3dfx.
> ==========================================================================
> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
> ==========================================================================
> Audio: no sound
> Starting playback...
> VDec: vo config request - 640 x 480 (preferred colorspace: Planar YV12)
> VDec: using Planar YV12 as output csp (no 0)
> Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
> VO: [xv] 640x480 => 640x480 Planar YV12
> V: 0.0 200/200 ??% ??% ??,?% 0 0
>
> Exiting... (End of file)
>
> But the error info not like the old one!
>
> On Wed, Dec 22, 2010 at 9:17 PM, liJin < <lijinsyam at gmail.com>
> lijinsyam at gmail.com> wrote:
>
>> I think thats the issue...
>>
>>
>> gst-launch -e v4l2src ! 'video/x-raw-yuv,width=320,height=240,
>> framerate=30/1' ! ffmpegcolorspace ! ffenc_mpeg4 ! mp4mux ! filesink
>> location=1.mp4
>>
>> run with* -e *option
>>
>>
>>
>> On Wed, Dec 22, 2010 at 6:01 PM, Santakivi Topi <<Topi.Santakivi at digia.com>
>> Topi.Santakivi at digia.com> wrote:
>>
>>> On 12/22/2010 12:18 PM, michael wrote:
>>> > 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
>>>
>>> When recording, with the above gst-launch line, do you stop
>>> the pipeline with Ctrl+C..?
>>>
>>> It could be that the file container doesn't get fully written
>>> in case of such an interrupt and that's why the clip doesn't play.
>>>
>>> For example, if you use this pipeline and
>>> stop it with Ctrl+C, the clip doesn't play:
>>>
>>> gst-launch-0.10 videotestsrc !
>>> 'video/x-raw-yuv,width=320,height=240,framerate=30/1' ! ffmpegcolorspace
>>> ! ffenc_mpeg4 ! mp4mux ! filesink location=test.mp4
>>>
>>> But this pipeline produces a valid video file:
>>>
>>> gst-launch-0.10 videotestsrc num-buffers=200 !
>>> 'video/x-raw-yuv,width=320,height=240,framerate=30/1' ! ffmpegcolorspace
>>> ! ffenc_mpeg4 ! mp4mux ! filesink location=test.mp4
>>>
>>> >
>>> > 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
>>>
>>> How about adding the format to the caps, e.g .
>>> v4l2src ! 'video/x-raw-yuv,format=(fourcc)I420,width=320,height=240,
>>> framerate=30/1' ! fmpegcolorspace ! x264enc! avimux ! filesink
>>> location=record.avi ?
>>>
>>> BR,
>>> Topi
>>>
>>> > 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 ...
>>> >
>>> > Some one can help me fix the issues? Tks :)
>>> >
>>> >
>>> > On 12/22/10, Timothy Braun < <braunsquared at gmail.com>
>>> braunsquared at gmail.com
>>> > <mailto: <braunsquared at gmail.com>braunsquared at gmail.com>> wrote:
>>> > > H264 is encoded with x264enc element.
>>> > >
>>> > > Sent from my iPhone
>>> > >
>>> > > On Dec 22, 2010, at 3:10 AM, wl2776 < <wl2776 at gmail.com>
>>> wl2776 at gmail.com
>>> > <mailto: <wl2776 at gmail.com>wl2776 at gmail.com>> 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 < <mcygogo at gmail.com>
>>> mcygogo at gmail.com
>>> > <mailto: <mcygogo at gmail.com>mcygogo at gmail.com>> 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:
>>> > >>
>>> >
>>> <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
>>> > >> 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:
>>> <http://p.sf.net/sfu/googleapps-sfnew>
>>> http://p.sf.net/sfu/googleapps-sfnew
>>> > >> _______________________________________________
>>> > >> gstreamer-devel mailing list
>>> > >> <gstreamer-devel at lists.sourceforge.net>
>>> gstreamer-devel at lists.sourceforge.net
>>> > <mailto: <gstreamer-devel at lists.sourceforge.net>
>>> gstreamer-devel at lists.sourceforge.net>
>>> > >> <https://lists.sourceforge.net/lists/listinfo/gstreamer-devel>
>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>> > >
>>> > >
>>> >
>>> ------------------------------------------------------------------------------
>>> > > 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:
>>> <http://p.sf.net/sfu/googleapps-sfnew>
>>> http://p.sf.net/sfu/googleapps-sfnew
>>> > > _______________________________________________
>>> > > gstreamer-devel mailing list
>>> > > <gstreamer-devel at lists.sourceforge.net>
>>> gstreamer-devel at lists.sourceforge.net
>>> > <mailto: <gstreamer-devel at lists.sourceforge.net>
>>> gstreamer-devel at lists.sourceforge.net>
>>> > > <https://lists.sourceforge.net/lists/listinfo/gstreamer-devel>
>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>> > >
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> 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:
>>> <http://p.sf.net/sfu/googleapps-sfnew>
>>> http://p.sf.net/sfu/googleapps-sfnew
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> <gstreamer-devel at lists.sourceforge.net>
>>> gstreamer-devel at lists.sourceforge.net
>>> <https://lists.sourceforge.net/lists/listinfo/gstreamer-devel>
>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> 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:
>> <http://p.sf.net/sfu/googleapps-sfnew>
>> http://p.sf.net/sfu/googleapps-sfnew
>> _______________________________________________
>> gstreamer-devel mailing list
>> <gstreamer-devel at lists.sourceforge.net>
>> gstreamer-devel at lists.sourceforge.net
>> <https://lists.sourceforge.net/lists/listinfo/gstreamer-devel>
>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>
>>
>
> ------------------------------------------------------------------------------
> 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: <http://p.sf.net/sfu/googleapps-sfnew>
> http://p.sf.net/sfu/googleapps-sfnew
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
>
> ------------------------------------------------------------------------------
> 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: http://p.sf.net/sfu/googleapps-sfnew
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
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