[gst-devel] Duplicates frames in h264 stream

[sudarshan bisht]

That means you are somewhere pushing GstBuffer with NULL data part and some
timestamp.

OK can you tell that the video play duration is fine or its doubled ?


On Mon, Jul 19, 2010 at 1:31 PM, Prabhulinga Swamy B S <prabhulingaswamy.bs@
globaledgesoft.com> wrote:

>
> Hi,
>         I agree with h264parse can complete h264 frames.
>
>         Before starting gstreamer pipeline, I'll negotiates the video
> resolution. Thats not a problem.
>
>         The reason, I'm receiving complete h264 frames before pushing to
> h264parse is, another display
>         application using ffmpeg is displaying the live stream. Display
> application uses the completed
>         frames for  displaying.
>
>         My problem is with dummy frames written into avi file.
>
>
> On 07/15/2010 11:36 AM, sudarshan bisht wrote:
>
>  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 at 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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