crawler: discard cdg not detected by typefind
Some CDG files are corrupted/weird and so are not detected by GStreamer's typefind. We should discard those as they won't work when switching to playbin and are likely corrupted anyway.
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Some CDG files are corrupted/weird and so are not detected by GStreamer's typefind. We should discard those as they won't work when switching to playbin and are likely corrupted anyway.