extraction of klv metdata

[gagankumarnigam]

can some body tell me how to extract klv meta data from runningvideo. eith example
which version of gstreamer support klv encoder klv decoder ?

[Arjen Veenhuizen]

GStreamer does not include a klv decoder. It does, however, support demultiplexing KLV from an mpeg2 transport stream. You could add an appsink to the application/x-klv pad to extract the raw byte sequences and feed those to your (own) klv decoder. Support for KLV has been added in 1.x, but I am not sure in what version exactly.

See also: http://gstreamer-devel.966125.n4.nabble.com/Tsdemux-synchronous-file-klv-metadata-extraction-failed-td4677807.html

[Baby Octopus]

What kind of klv metadata do you need to extract? It depends on that.

If the KLV data is present in TS stream, I remember recently the support is added in mpegtsmux element to mux KLV, so tsdemux might have a support for demuxing KLV

If  the data is inside elementary stream such as H264 SEI, you might need to change gst-libav code to support that based on how it is structured

[gagankumarnigam]

Hi,

Is there any pipeline in gstreamer which can play as well as extract klv
metdata..?

I am using gstreamer-1.10.4 which is having support for klv data. With the
use of examples of rtpklvpay/rtpklvdepay i am able to extract the data from
video. which can also be easily found out on internet.

I tried to play this video having klv metdata but result in failure. But
when i play it with totem player it always asks meta/x-klv decoder , still
it plays. Video is downloaded from the link given below:
http://samples.ffmpeg.org/MPEG2/mpegts-klv/Day%20Flight.mpg

I tried combination like :

gst-launch-1.0 filesrc location=DayFlight.mpg ! tsparse ! tsdemux !
meta/x-klv ! rtpklvpay ! autovideosink


Can anybody have any idea how to play play and extract the klv data fro
video







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[GalDa]

Hi @gagankumarnigam,

Did you managed to extract the klv data from this video?




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