Get the th frame from a video

[Nicolas Dufresne]

Le lundi 24 juillet 2017 à 04:30 -0700, Antoine a écrit :
> Hi guys !
> I'm new here and new with Gstreamer. I'm looking for a way to extract a jpeg
> image from a h264/mp4 file. 
> I already have a pipeline which works but it's very slow (12 sec for 1min
> video) : 
> gst-launch-1.0 filesrc location=1.mp4 typefind=true ! video/quicktime !
> aiurdemux ! queue ! vpudec ! decodebin ! videorate ! video/x-raw,
> framerate=1/60 !  vpuenc_jpeg ! filesink location=test.jpg
> In fact this pipeline it's not really what I'm looking for, I just want to
> capture the 10th frame from my video and use it like a preview (static
> preview). I'm sure there is be a simple pipeline to do this.
> Thank you for your time.
> Antoine

You could pause the pipeline, and use a step event to skip the first 9
frames. Note that thumbnailing this way does not work very well. The
Gnome thumbnailer as an example will seek at several places, and will
chose the thumbnail based on a small statistic to figure-out if the
frame isn't a black frame, or green frame.

regards,
Nicolas
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