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

Timothy Braun braunsquared at gmail.com
Wed Dec 22 16:24:52 CET 2010 

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
>
>
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