
ошибка была такая: Error: no element "ffdec_h264"
Видимо, существует проблема совместимости плагинов для 0.10 и 1.0 версии. программу собирал первой, а проверял на gst-launch-1.0

UPDATE: сам спросил - сам отвечаю

GStreamer-0.10 and GStreamer-1.0 are the main version ’series’ currently in use. For all practical
purposes you should think of them as two completely different libraries which just happen to have a
similar name. They can be installed in parallel and are completely independent