[gst-devel] how to create a pipeline to record video from camera?

michael mcygogo at gmail.com
Thu Dec 23 02:46:31 CET 2010 

neither qtmux nor mp4mux is not work well

On Wed, Dec 22, 2010 at 11:24 PM, Timothy Braun <braunsquared at gmail.com>wrote:

> Not qtmux, use mp4mux.
>
>
> On Wed, Dec 22, 2010 at 10:10 AM, michael <mcygogo at gmail.com> wrote:
>
>> 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
>>>
>>>
>>
>>
>> ------------------------------------------------------------------------------
>> 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
>>
>>
>
>
> ------------------------------------------------------------------------------
> 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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