The issue is definitely that playbin is getting passed the raw URI, which it does not like. It seems from Andrew's comment above that it prefers a fully encoded URI which makes sense given that the playbin property's field name is "uri".
The issue is definitely that playbin is getting passed the raw URI, which it does not like. It seems from Andrew's comment above that it prefers a fully encoded URI which makes sense given that the playbin property's field name is "uri".