meta,
    args={
        "gltestsrc ! gldownload ! autovideoconvert name=convert ! capsfilter name=capsfilter caps=\"video/x-raw(memory:GLMemory)\" ! fakevideosink name=sink",
    },
    configs={
        [validateflow,
            pad="^convert:src$",
            record-buffers=true,
            ignored-fields="stream-start={stream-id,group-id,stream},buffer={meta}"],
    }

crank-clock, repeat=2
wait, on-clock=true
foreach,
    caps=<"video/x-raw", "video/x-raw(memory:GLMemory)", "video/x-raw">,
    actions={
        [checkpoint, text="Setup capsfilter caps=$(caps)"],
        [set-properties,
            capsfilter::caps="$(caps)"],
        [crank-clock, repeat=2],
        [wait, on-clock=true],
    }
stop