While more difficult to configure than the default menu options, the AG-HVX200 framerate hack allows you to shoot at rates as low as 2 fps (undercranking), which can save recording capacity and increase the sensitivity of the camera. You can also use the hack on the HVX200A and it is believed it will function on the HPX170. Panasonic has released support for this hack on some of their non-english websites. To perform this hack, you'll need a computer with a text editor (like notepad, included with Windows).
00005000: 8 ; DETAIL LEVEL: 0
00005001: 8 ; V DETAIL LEVEL: 0
00005002: 8 ; DETAIL CORING : 0
00005003: 8 ; CHROMA LEVEL: 0
00005004: 8 ; CHROMA PHASE: 0
00005005: 8 ; COLOR TEMP: 0
00005006: 16 ; MASTER PED: 0
00005007: 8 ; A.IRIS LEVEL: 0
00005008: 1 ; NEWS GAMMA: OFF
00005009: 0 ; GAMMA : HD NORM
0000500A: 0 ; KNEE: AUTO
0000500B: 0 ; MATRIX: NORM
0000500C: 1 ; SKIN TONE DTL : OFF
0000500D: 0 ; V DETAIL FREQ : THIN
0000500E: 0 ; OPERATION TYPE: VIDEO CAM
0000500F: 0 ; FRAME RATE: DEFAULT
00005010: BE026801 ; SYNCRO SCAN :
number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36+ |
framerate (fps) | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 23 | 24 | n/a | 26 | 27 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | n/a | 54 | 56 | 58 | 60 | repeat 50 to 60 |
0000500F: 1 ; FRAME RATE: DEFAULT
0000500F: 34 ; FRAME RATE: DEFAULT
When you select the scene file, you'll see the new frame rate there. If you change the framerate, you won't be able to change it back to a nonsupported framerate without reloading the scene file from the card. Remember that audio is not recorded when using any 720pN settings except for the default frame rates.
Looking for 25 fps on a NTSC HVX200? It has been reported that setting the frame rate value to 15 will allow recording at approximately 24.97 fps only over firewire to a program like DVRack. Recording to P2 cards will produce an error. It is reported that the HPX170 will support some of these framerates without a hack, and will support recording at approximately 25 fps (without audio) in 720pN24 mode to P2 cards.