plugins/mp4: use common type for stream
plugins/mp4: use common type for stream

Pelagicore/Media-Manager-lightmediascanner-patched,profusion/lightmediascanner,profusion/lightmediascanner,Pelagicore/Media-Manager-lightmediascanner-patched,profusion/lightmediascanner,Pelagicore/Media-Manager-lightmediascanner-patched