[gst-devel] Duplicates frames in h264 stream

[Prabhulinga Swamy B S]

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