[gst-devel] Duplicates frames in h264 stream

[sudarshan bisht]

 Hi ,


  You are setting caps 800x600 in caps but you output shows 1280x720 ??

   And why you are waiting to receive a complete frame ?  you can simply
push the data to appsrc , h264parse is there to build a complete frame .



On Thu, Jul 15, 2010 at 11:15 AM, Prabhulinga Swamy B S <prabhulingaswamy.bs
@globaledgesoft.com> wrote:

> hi Sandeep,
>      thank you for your reply.
>
>     Yes, I'm sure of receiving 30 fps from the network. After
> completely receiving
>     the frame, I'm incrementing frame count.
>
>     What I mean about the duplicate frames is, after every valid frame
> in the resulting
>     video file, there is a duplicate and empty frame.
>
>     The fallowing output can clear your doubt.
>
> 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
>
> [h264 @ 0x806ed70]non-existing PPS referenced
> [h264 @ 0x806ed70]decode_slice_header error
> [h264 @ 0x806ed70]no frame!
> Error while decoding stream #0.0
> Error while decoding stream #0.0
>     Last message repeated 1 times
> [h264 @ 0x806ed70]non-existing PPS referenced
> [h264 @ 0x806ed70]decode_slice_header error
> [h264 @ 0x806ed70]no frame!
> Error while decoding stream #0.0
> *** 1 dup!
> Error while decoding stream #0.0
> *** 1 dup!
>         .
>         .
>         .
> Error while decoding stream #0.0
> *** 1 dup!
> frame=  315 fps=122 q=0.0 Lsize=      -0kB time=5.26 bitrate=
> -0.0kbits/s dup=315 drop=0
> video:0kB audio:0kB global headers:0kB muxing overhead -inf%
>
> I've received 315 frames from the network and pushed those many frames into
> gstreamer pipeline. But don't know why these dummy frames are written
> into the file.
>
> For ex, if I receive 30MB of video data, the resulting file is also of
> same size, but
> frames count will be double the original frames.
>
>
>
>
> On 07/14/2010 09:38 PM, Sandeep Prakash wrote:
> > Hi,
> >
> >
> > Prabhulinga Swamy B S wrote:
> >
> >>         appsrc is-live=true
> >> "caps=video/x-h264,width=800,height=600,framerate=30/1" ! \
> >>           h264parse ! queue ! avimux ! queue ! filesink
> >> location=filename.avi
> >>
> >>
> > Are you sure the h264 stream you are getting from the network has 30 fps?
> >
> >
> > Prabhulinga Swamy B S wrote:
> >
> >>       But the resulting file is having duplicate frames.
> >>       For ex, if i push 200 frames, the resulting file contain nearly
> 200
> >> frames.
> >>
> >>
> > Plz explain in detail on the above statements. What does "nearly" mean?
> >
> > Regards,
> > Sandeep
> >
>
> --
>
> Regards,
> Prabhulinga Swamy B S
>
>
>
>
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-- 
Regards,

Sudarshan Bisht
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