[gst-devel] Duplicates frames in h264 stream

[Prabhulinga Swamy B S]

Hi,
     My application not aimed at any fixed resolution. The sender 
application is getting frames
     from a camera. The aim is to get  at video at 30fps. I just tried 
writing 60fps to avi header
     to test video file. Sorry if you misleaded with that.

     I get GST_DEBUG=3 and I got this output as in the attachment.



On 07/20/2010 01:13 PM, sudarshan bisht wrote:
> use export GST_DEBUG=element_name:5
>
> What is your goal here ? You want an avi file having video width and 
> height 1280x720 or 800x600 ? with frame rate 30 or 60 ?
>
> And can you please tell us what is you sender application ? Is it some 
> gstreamer pipeline ?
>
>
>
>
>
> On Tue, Jul 20, 2010 at 10:29 AM, Prabhulinga Swamy B S 
> <prabhulingaswamy.bs <http://prabhulingaswamy.bs>@globaledgesoft.com 
> <http://globaledgesoft.com>> wrote:
>
>
>     Hi,
>
>         I am setting the video caps of appsrc as,
>
>        appsrc is-live=true
>     "caps=video/x-h264,width=1280,height=720,framerate=60/1" \
>            h264parse ! queue ! avimux ! queue ! filesink
>     location=filename.avi
>
>            To test the video file, I just set it as 60fps. I'm having
>     a count for
>            number of frames received. I'm sure its 30fps. If i set
>     video caps as 30fps
>            file take double the time, and if  I set it as 60fps, it
>     plays as normal.
>
>            I set the GST_DEBUG=3 as a environment variable. Is it
>     right ? I didn't get
>            any debug messages of gstreamer.
>            Or, let me know correct way of setting GST_DEBUG variable.
>
>
>     With Regards,
>         Prabhu B S
>
>
>     On 07/20/2010 12:44 PM, sudarshan bisht wrote:
>     >
>     > But if the frame rate is 60 then the file duration should be half  ,
>     > right ?
>     >
>     > Can you dump the file before giving it to avimux and check the
>     number
>     > of frames ?
>     >
>     > On Tue, Jul 20, 2010 at 9:41 AM, Sandeep Prakash
>     <123sandy at gmail.com <mailto:123sandy at gmail.com>
>     > <mailto:123sandy at gmail.com <mailto:123sandy at gmail.com>>> wrote:
>     >
>     >
>     >     Hi Prabhulinga,
>     >
>     > >From your ffmpeg command line
>     >
>     >      prabhu at prabhu:avi $ ffmpeg -v 5 -i sample.avi -f null -
>     >      Input #0, avi, from 'sample.avi':
>     >       Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
>     >         Stream #0.0, 1/60: Video: h264, yuv420p, 1280x720,
>     1/120, 59.94
>     >      tbr, 60 tbn, 120 tbc
>     >      Output #0, null, to 'pipe:':
>     >         Stream #0.0, 1/90000: Video: rawvideo, yuv420p, 1280x720,
>     >      1001/60000, q=2-31, 200 kb/s, 90k tbn, 59.94 tbc
>     >      Stream mapping:
>     >       Stream #0.0 -> #0.0
>     >       existing PPS referenced
>     >
>     >     we can also observe that the framerate is actually 60 (59.94
>     to be
>     >     exact)
>     >     and not 30
>     >     as you are saying. So somewhere the framerate is getting
>     modified.
>     >     This
>     >     explains the
>     >     video duration getting awry.
>     >
>     >     Can you attach some logs that will show the caps at each
>     element. Try
>     >     setting the
>     >     GST_DEBUG=3 env variable.
>     >
>     >     Also you can try to disable your frame completion logic and
>     check
>     >     whats the
>     >     outcome.
>     >
>     >     Regards
>     >     Sandeep Prakash
>     >
>     >
>     > --
>     > Regards,
>     >
>     > Sudarshan Bisht
>     >
>     >
>     >
>
>
>
>
> -- 
> Regards,
>
> Sudarshan Bisht
>
>
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-- 

Regards,
Prabhulinga Swamy B S


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