Re: How to skip until first key frame without decoding

Nicolas Dufresne via gstreamer-devel <[email protected]> Wed, 06 Sep 2023 13:39:21 -0400

Newsgroups	gmane.comp.video.gstreamer.devel
Message-ID	<[email protected]>

Le mardi 05 septembre 2023 à 17:33 +0900, geysee via gstreamer-devel a écrit :
> Hello,
> 
> 
> I tried the following pipeline with C++ coding (Properties are omitted).
> 
> 
>      pipeline1 : splitmuxsrc ! h264parse ! queue ! qtmux ! filesink
> 
> 
> When I seek range "start", I would like to skip frame until first key frame
> without decoding.
> 
> Would you give me how to do it anyone?

If you issue a seek, qtdemux will send picture from the previous keyframe.
Using GST_SEEK_FLAG_KEY_UNIT | GST_SEEK_FLAG_SNAP_AFTER should instead give you
frames from the next keyframe (for supported demuxers).

Nicolas

> 
> Best regards,
> Kamiya