Python API

[Abdumuminov, Umedzhon]

Hi there,

I have custom element that some attaches metadata to buffers.
Now, I'm writing python application that should uses those metadatas attached by my custom element. I built a pipeline with appsink element. I subscribed to "new-sample" event of appsink and here is my problem:

How can I extract all metadatas attached to buffer?


I tried to use Gst.Buffer.foreach (https://gstreamer.freedesktop.org/documentation/gstreamer/gstbuffer.html#gst_buffer_foreach_meta) but that prints me a lot of GSTREAMER-CRITICAL errors (GStreamer-CRITICAL **: 14:45:13.275: gst_buffer_foreach_meta: assertion 'gst_buffer_is_writable (buffer)' failed).

I there any other way to iterate through metas?


However, I tried to find any workaround and found this function: GstVideo.buffer_get_video_region_of_interest_meta_id and here is my next question:

What is purpose of GstVideoRegionOfInterestMeta::id?

Regards,
Umed

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