040000 tree e348ce7611e848a1beab937c25680630db3018aa	camera
040000 tree 215d4551699c75d50e359847b355db4c7c99d66c	codec_impl
040000 tree e27ce969cb7a34788ce5c5b146baed5b24a1a733	raw_video_writer
040000 tree 2b2882feaa64f8743d983471c7b69d6e10df0008	wav_writer