Until the advent of AVCHD Progressive mode, native progressive-scan video for 1080-line resolution had been available only in 24 frames/s variant. In 2010, Panasonic introduced a new lineup of consumer AVCHD camcorders with 1080-line 50p/60p progressive-scan mode (frame rate depending on region). Panasonic advised that not all players that support AVCHD playback could play 1080-line 50p/60p video. In 2011, this mode was officially included into the AVCHD specification as part of 2.0 addendum, and has been called AVCHD Progressive. This mode uses the same AVCHD folder structure and container files for storing video, with the maximum bitrate of 28 Mbit/s. In 2011, Sony introduced consumer and professional AVCHD models capable of AVCHD Progressive recording. In 2012 JVC announced the GY-HMQ10 model, which also can record AVCHD Progressive video.