understanding about framerate in diffrent plugins.

[surprised]

Hi,gstreamers.
     Videoparse has a property called "framerate". But I don't really
understand it correctly. Does it mean that the upstream must pass it via
given framerate,or that the final formed file has this framerate? For
another thing,we can also set framerate in the "caps".And what does this
framerate mean?  As for encoder(omxh265enc), how can I set the encoded video
file a given framerate file(omxh265enc doesn't have a property named
"framerate")?



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[Thornton, Keith]

Hi,
To adjust the framerate I use the videorate plugin followed by a CAPS structure defining the framerate I wish to have. I am only halving my framerate and for this I set the parameters drop-only and skip-to-first. It does however introduce some jitter
Gruesse

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Von: gstreamer-devel <[hidden email]> Im Auftrag von surprised
Gesendet: Dienstag, 29. Oktober 2019 08:20
An: [hidden email]
Betreff: understanding about framerate in diffrent plugins.

Hi,gstreamers.
     Videoparse has a property called "framerate". But I don't really understand it correctly. Does it mean that the upstream must pass it via given framerate,or that the final formed file has this framerate? For another thing,we can also set framerate in the "caps".And what does this framerate mean?  As for encoder(omxh265enc), how can I set the encoded video file a given framerate file(omxh265enc doesn't have a property named "framerate")?



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[surprised]

Hi,I'm sorrry.I still don't konw what does "framerate" of videoparse  mean?
Can you give a detailed description?Thank you.



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[Nicolas Dufresne-5]

Le mardi 29 octobre 2019 à 02:20 -0500, surprised a écrit :
> Hi,gstreamers.
>      Videoparse has a property called "framerate". But I don't really
> understand it correctly. Does it mean that the upstream must pass it via
> given framerate,or that the final formed file has this framerate? For
> another thing,we can also set framerate in the "caps".And what does this
> framerate mean?  As for encoder(omxh265enc), how can I set the encoded video
> file a given framerate file(omxh265enc doesn't have a property named
> "framerate")?

videoparse (or rawvideoparse these day), is a debugging tool so you can
take raw frame from disk, cut them up in valid frame chunk, and set
timestamp on it. The framerate is used to craft the timestamp.

Nicolas

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