[gst-devel] Duplicates frames in h264 stream

[Prabhulinga Swamy B S]

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>> 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
>
>
>