De V-4 is een 4-kanaals videomixer voor mobiele toepassingen. Hij kan echter ook in een installatie worden gebruikt, bv. in discotheken, kerken, theaterzalen en liveconcerten. Dankzij zijn compacte ombouw kan de V-4 overal worden gebruikt waar er creatief met videobeelden moet worden gewerkt. Zie de vergelijkende SD-mixertabel.

De V-4 ondersteunt de V-LINK-technologie, die door Roland werd ontwikkeld om muzikanten zélf te laten bepalen welk videomateriaal op welk moment wordt getoond. Dankzij V-LINK kunt u clips starten, met verschillende effecten bewerken en zelfs de aard van de overgangen kiezen door gewoon op uw instrument te spelen. Hiervoor hebt u een optionele PR-80 van Edirol nodig. De V-4 videomixer is voorzien van MIDI IN/OUT/THRU-connectoren voor een verregaande automatisering van de video-effecten en overgangen.

  • Videomixer/switcher met 4 ingangskanalen
  • Gescheiden TBC-functie voor 2 kanalen/framesynchronizer
  • 2 gescheiden digitale effectkanalen
  • T-bar videofader van professionele kwaliteit
  • Eenvoudige bediening
  • BPM-synchronisatie van audio- en videomateriaal
  • Meer dan 200 overgangseffecten

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Best Video Product for 2004
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2004 Review

Videomixer/switcher met 4 ingangskanalen
De V-4 biedt 4 composietingangen (RCA/cinch) en 2 S-Video-ingangen (Y/C). De omschakeling tussen de 4 videobronnen kan via "Dissolve"- of "Wipe"-effecten (±200 variaties) of meteen gebeuren. De V-4 stuurt dezelfde videobron telkens naar alle 3 uitgangen uit (composiet x2, S-Video x1), zodat de gebruiker het resultaat kan volgen zonder gebruik te maken van externe verdelerkastjes.

Over 200 Transition EffectsSee Listings Here
v4_transition_icon

Hard Edge Types

Luminance Types
Multi Border Types
Sliding Types
Soft Edge Types

Professionele beeldkwaliteit
Alle ontvangen signalen worden in het digitale domein bewerkt, wat een professioneel resultaat oplevert (13.5MHz, 8 bit, 4:2:2, DV-kwaliteit). Omdat de V-4 alles digitaal bewerkt, kunnen de beelden ook naar een groot beeldscherm worden doorgegeven.

Gescheiden TBC-functie voor 2 kanalen/Framesynchronizer
De ingangssignalen worden eerst door 2 aparte TBC-kanalen ("Time Base Correction"), die de tijdcode bewerkt. Bovendien zijn er 2 framesynchronizers voor het bewerken van de twee bronnen. Deze wijzigingen zijn noodzakelijk om vloeiende overgangen en "Dissolve"-effecten bij een perfect stabiel beeld te verkrijgen.

2 gescheiden digitale effectkanalen
De V-4 bevat 2 gescheiden video-effectprocessors voor de meest uiteenlopende effecten (zie de specificaties). Verder laat de V-4 het simultane gebruik van twee beeldbronnen toe via beeld-in-beeld, "Chroma Key" of "Luminance Key". De effecten kunnen met de druk op één knop worden opgeroepen.

T-bar videofader van professionele kwaliteit
Met de T-bar verkrijgt u zonder veel moeite professionele crossfades. Nieuw bij de V-4 is de mogelijkheid de T-bar naar wens verticaal (zoals gebruikelijk voor videotoepassingen) of horizontaal (zoals bij DJ-apparatuur) te installeren. De fader heeft een resolutie van meer dan 100 stappen voor traploze overgangen. De metalen behuizing en de fader zijn bijzonder stevig uitgevoerd.

Eenvoudige bediening
Tijdens de ontwikkeling van de V-4 hebben we erop gelet dat alle functies op het frontpaneel meteen duidelijk zijn. Dankzij dit bedieningscomfort bereikt iedereen er fantastische resultaten mee. Voor de meeste functies hoeft u de handleiding van de V-4 niet eens te lezen.

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Menu op het beeldscherm

Preview'-functie en menu op het beeldscherm
De "Preview"-functie wordt via de keuze van de ingangsbron bediend. Daarmee kunt u de beelden van de gekozen ingangsbron (1~4) of het uitgestuurde signaal controleren alvorens het te activeren (al dan niet via een overgang). U hebt dus geen aparte monitors voor deze signalen nodig - één scherm is voldoende! De belangrijkste functies van de V-4 (effectkeuze, MIDI-instellingen enz.) bereikt u via vast toegewezen knoppen en via het schermmenu. Het videosignaal van het schermmenu wordt niet naar de hoofduitgangen gestuurd, zodat u er constant mee kunt werken.

Instellingsgeheugens
De V-4 laat toe de instellingen voor elke knop (bv. de effecttoewijzingen) op te slaan en op het gewenste moment weer te laden. De inhoud van de geheugens blijft na het uitschakelen bewaard, dit kan tot maximaal 8 configuraties.

v4_rear
Achterpaneel

Audio/video-synchronisatie & MIDI-functies
De overgangen en effecten van de V-4 kunnen met een MIDI-signaal worden gesynchroniseerd. Om te zorgen dat de overgangen en effecten hetzelfde tempo (BPM) hanteren als de muziek hoeft u maar de TAP-knop in te drukken. Talrijke functies van de V-4 kunnen ook via MIDI (bv. via een toetsenboard) worden aangestuurd. Als u ook een PR-80 bezit, kunt u videoclips van een DV-7PR met de video-effecten van de V-4 combineren - dit alles in realtime.

V-4

Videoformaat

NTSC of PAL (ITU601)

Video-samplingfrequentie

13.5MHz4:2:2 (Y:B-Y:R-Y), 8 bit, framesynchronizer x2

Video-ingangen

S-video: Mini-DIN met 4 pennen

Video (composiet): RCA/cinch x4 (ingang 1~4; Als 1/2 tegelijk S-Video-signalen ontvangen, hebben de S-Video-signalen voorrang)

Video-uitgangen

S-video: 4 pennen, Mini-DIN x1

Video (composiet): RCA/cinch x2

Uitgangsniveau en impedantie

S-video: 1Vp-p, 75ohm

Video (composiet): 1Vp-p, 75ohm

"Chrominance"-signaal: 0.286Vp-p, 75ohm

Overgangseffecten

Mix, Wipe (4 types), Beeld-in-beeld (4 types)

Effecten voor de beeldcombinatie

Stapelen (verwijderen van het zwart)

Controle

MIDI (in, out), V-LINK

Voeding

Speciale adapter

Opgenomen vermogen

1500mA

Afmetingen en gewicht

Breedte

209 mm

 

Diepte

282 mm

 

Hoogte

77 mm

 

Gewicht

1.8 kg

 

 

Configuration Examples

Live Production/Church
Here we have 4 inputs - 2 live cameras, text, still or video input coming from a laptop and all high quality video playback coming from the PR-80. By using a luminance key with the text input (e.g., PowerPoint, MediaShout, etc.) from the computer, you can overlay song lyrics,notes or messages over any of your other 3 inputs. Of the three outputs, 2 are being sent to the house projectors and the third one is recording the event to a VCR. At all times you can independently monitor your inputs and effects via the preview monitor. Note: S-video output or RGB-to-video scan converter is required to connect a computer to the V-4.

v4_diagram1

 

Multi-Camera Live Event
In this example we have 4 live cameras being mixed to 2 house projectors, bringing image magnification (IMAG) to the room. We are also recording the event to a VCR as well. In a non-IMAG setting (i.e., school, courtroom, community TV) you would not send the output to projectors and simply record the event. At all times you can independently monitor your inputs and effects via the preview monitor.

v4_diagram2

 

Corporate Event
Often at corporate or church events, the playback material is on different media (VHS, DVD, miniDV, Betacam, etc.). In this example we have 4 inputs - 1 live camera and 3 different playback devices. The V-4 makes it easy to mix between material coming from a variety of sources. Of the three outputs, only two are being used - 1 is being sent to a lobby plasma and 1 is being sent to the house projector.
At all times you can independently monitor your inputs and effects via the preview monitor.
This setup can be greatly simplified by using a PR-80 to playback all video material as shown in Example 1 above.

v4_diagram3

 

VJ/Club Setup
Having instant access to video material along with transitions and effects is the key to any visually stimulating display. In this example the VJ has material playing on the 2 DVDs, the VCR as well as their PC. The V-4 allows the real-time manipulation and transitioning between all of these inputs. The outputs are doing to the LCDs or plasma around the room or in the private boxes as well as to projectors throughout the house. At all times you can independently monitor your inputs and effects via the preview monitor.
As in the previous example, this setup can be greatly simplified by using a PR-80 to playback all video material as shown in Example 1 above. Note: S-video output or RGB-to-video scan converter is required to connect a computer to the V-4.

v4_diagram4

 

Independent Multi-Camera Shoot with IMAG
This example combines Example #1 and #2 above. It allows you to use and be recording a 4 camera shoot via the first V-4 but also overlay text or playback other video material via the second V-4 for room image magnification (IMAG). This configuration allows you to keep shooting the event (via your 4 cameras) independently of what is happening on the house screens. For example, your house screens could go to black or perhaps playback a clip (via the PR-80) - but your cameras could still be capturing audience or stage reaction. Conversely you can decide to use your multi-camera feed from the first V-4 for IMAG. At the same time, you can record the IMAG output via the 2nd V-4. At all times you can independently monitor all inputs and effects via the preview monitors.

v4_diagram5_sm
Vragen omtrent producten
- The field of view of video images output from the OUTPUT terminal differs from those output from PREVIEW OUT?terminal.
"Images are output from the OUT PUT terminal after internally converting the input analog signals into digital signals and the field of view information is not added to them. The field of view can vary depending on the display connected and/or its setting and you need to adjust the aspect ration of the I/O signals of the device connected to V-4."
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- When a channel to which the video signal is not input is output, a blue screen is displayed. Can I change this screen?
"Yes. You can change it to black. Follow the procedure below. 1. Select ""No Signal Blueback"" from ""Utility"" on the preview screen. 2. When ""Blueback?Off?On"" is displayed, select ""On"" or ""Off."" Selecting ""On"" chooses the blue screen. Selecting ""Off"" chooses the black screen."
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- Can I hide the menu screen from the preview monitor of V-4?
"Yes. From [Utility] to configure various settings, change [Preview Display Mode] to [No Display] in the procedure below. 1. Press the [Menu] button. 2. Use the (­¯) cursor buttons to select [Utility], and press the [Enter] button. 3. Use the (­¯) cursor buttons to select [Preview Display Mode], and press the [Enter] button. 4. Use the (­¯) cursor buttons to select [No Display]. 5. Press the [Menu] button three times to return to the original screen. Check that the menu screen on the preview monitor disappears. "
Heeft dit geholpen? Ja Nee
- Can I use Color Insertion in transition?
No.
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- Can I scan and convert PC screenshots?
No. In order to input screenshots from a PC with no video output terminal to V-4, you must convert the VGA output from the PC into video signals using a scan converter.
Heeft dit geholpen? Ja Nee
- Can I use V-4 with DV-7R or DV-7PR?
"Yes. You can import video mixed by V-4 into DV-7R/DV-7PR and mix video output from DV-7R/DV-7PR with another video in V-4. You can also control V-4 from DV-7PR via MIDI."
Heeft dit geholpen? Ja Nee
- Can I merge four screens with V-4?
"No. * You can merge two screen using the Picture-in-Picture function."
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- I´m planning to use V-4 in a dark place. Do the buttons light?
The buttons of V-4 light to allow you to use the device in a dark place such as a VJ booth in a club.
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- Can I switch video seamlessly when a device with no TBC (Time Base Corrector) such as VHS or Hi-8 deck is connected?
Yes. V-4 is equipped with separated TBCs on the channels A and B to allow seamless switching when mixing VHS or Hi-8 video with a DV or S-Video source.
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- What is the V-Link function?
V-Link gives effects to video synchronously with music. Usually, various settings are required to control V-4 operation from a MIDI device such as sequencer or MIDI keyboard. When a V-Link-enabled Roland or EDIROL device is connected to V-4, powering this device on automatically performs necessary MIDI settings.
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- Does V-4 support NTSC? How can I switch V-4 to support NTSC from PAL?
"Yes. To switch from PAL to NTSC, follow the procedure below. While pressing and holding the preview select button #1 and ""OUTPUT"" together, press the POWER button. When you start V-4 next time by pressing the POWER button, V-4 will start in the NTSC mode. To return to the PAL mode, press the POWER button again while pressing and holding the preview select button #1 and ""OUTPUT"" together."
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- Can I use V-4 as the video switcher in presentation at a meeting or exhibition?
Yes. V-4 provides the normal and presentation modes. Using V-4 in the presentation mode allows you to easily switch inputs 1 to 4 and merge video using the Picture-in-Picture function.
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- How is input video processed internally?
Video is sampled at 13.5MHz, 4: 2: 2(Y: b-Y: R-Y)/8 bits to achieve video quality equivalent to DV.
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- Can I mount V-4 in a rack?
No.
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- How can I keep video intact when I leave my finger from the TRANSFORMER button?
"At the factory setting, while the memory dial is set to #1, video is switched immediately after you leave your finger from the TRANSFORMER button. To prevent this action, change the memory settings from #2 to #8. Follow the procedure below. (See Page 55 of V-4 User´s Manual.) 1. Set the memory dial to one of #2 to #8. 2. Press the [Menu] button. The menu for changing settings appears on the screen for preview output. 3. Use the cursor buttons to select ""Transformer."" 4. Press the Enter button. 5. Select a pattern. If you select a pattern other than 01 or 02, The video switching pattern changes as follows: * 02: Outputs video from the channel corresponding the button only while the button is pressed. * 03?12: Video from channels A and B toggles each time you press the button. * 13?22: Switches to video from the channel corresponding the button. * 23?32: Switches to video from the channel opposite to the channel corresponding the button. 6. After you made selection, press the menu button to return to the previous screen."
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- How can I change the size and position of the child screen of the Picture-in-Picture function?
"Follow the procedure below. 1. Press the effect button to which the Picture-in-Picture function is assigned to show the child screen. 2. Press the [Output] button of the preview select button to show the menu screen on the monitor. 3. Press the [Menu] button. 4. Press the cursor buttons to select any of ""PinP1 Setup"" to ""PinP8 Setup"" and press the [Enter] button. Select the figure same as the figure of the memory dial currently selected. 5. The Picture-in-Picture parameters are displayed. Select a parameter to set and press the [Enter] button. Set the size by ""4: 3HVsize"", vertical position by ""VPosi"", and horizontal position by ""HPosi"". 6. Press the cursor buttons to adjust the parameter value. 7. After you made setting, press the [Menu] button to return to the previous screen."
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- Can I replace the T-bar type video fader of V-4 with a cross fader?
"Yes. We offer optional V-4CF cross fader. You can install and adjust the fader by yourself."
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- How can I change video from the channel A to the child screen of the Picture-in-Picture function?
"To change video from the channel A to the child screen of the Picture-in-Picture function, assign the Picture-in-Picture function to the effect of the channel A. Follow the procedure below. 1. Press the [Output] button of the preview select button to show the menu screen on the monitor. 2. Turn the memory dial and set it to a position other than #1. 3. Press the [Menu] button. 4. Press the cursor buttons to select ""Effect-A"" and press the [Enter] button. 5. Press the cursor buttons to select any of ""A-Efx1"" to ""A-Efx4"" and press the [Enter] button. 6. Press the cursor buttons to select any of ""PinP-1"" to ""PinP-8"". 7. After you made setting, press the [Menu] button to return to the previous screen. After completing the above setting, pressing the effect button to which the Picture-in-Picture function is assigned changes video from the channel A to the child screen."
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- Can I check videos from channels 1 to 4 simultaneously on the preview output terminal on V-4?
"No. You can use the Picture-in-Picture function to check two screen simultaneously. "
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- Can I move the child screen of the Picture-in-Picture function in real time?
No. You cannot the child screen of the Picture-in-Picture function in real time.
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- How can I cut and switch videos from the channels A and B?
"At the factory setting, while the memory dial is set to #1, videos from channels A and B are cut and switched immediately after you leave your finger from the TRANSFORMER button. To cut and switch videos when other memory settings are selected, set the switching time of the TRANSFORMER button to 0. Set the TRANSFORMER button in the procedure below. (See Page 55 of V-4 User´s Manual.) 1. Set the memory dial to one of #2 to #8. 2. Press the [Menu] button. The menu for changing settings appears on the screen for preview output. 3. Use the cursor buttons to select ""Transformer."" 4. Press the Enter button. 5. Select a pattern. Selecting 02, 12, 22, or 32 pattern allows you to cut and switch videos. The video switching pattern changes as follows: * 02: Outputs video from the channel corresponding the button only while the button is pressed. * 12: Video from channels A and B toggles each time you press the button. * 22: Switches to video from the channel corresponding the button. * 32: Switches to video from the channel opposite to the channel corresponding the button. 6. After you made selection, press the menu button to return to the previous screen."
Heeft dit geholpen? Ja Nee
- The top part of video is truncated when it is output to the monitor via V-4.
"Adjust the vertical and horizontal display sized on the panel. Follow the procedure below to adjust the display size. 1. Press the [Menu] button. The menu appears on the preview monitor. 2. Press the cursor buttons to select ""Utility"". Press the [Enter] button to move to the next screen. 3. To adjust the vertical display size, select, ""Video Display Range V"". To adjust the horizontal display size, select, ""Video Display Range H"". After selecting an option, press the [Enter] button to move to the next screen. 4. Press the cursor buttons to adjust the display size in the selected direction. Decreasing the value enlarges the display size. 5. After you made setting, press the [Menu] button to return to the previous screen. Press the [Menu] button three times to return to the previous screen. "
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- Which buttons and dials can I control from an external MIDI device?
"You can control the following buttons and dials from an external MIDI device: * Channel A/B switch button * Effect buttons 1 to 4 for channel A * Effect buttons 1 to 4 for channel B * TRANSITION button * TRANSFORMER buttons A and B * video fader * BPM/SYNC button * Transition time * Output fader Assign these buttons and dials to control changes 1 to 95 on the menu screen. When V-4 receives a control change, it executes the corresponding button or dial function just as the button or dial itself has been operated. * By connecting a V-Link-enabled Roland device and enabling the V-Link function, these settings are automatically done. "
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- Can I switch videos from the channels A and B synchronously with music?
"Yes. V-4 can automatically switch videos without operating the video and fader or pressing the switch buttons synchronously with music. Switching videos using BPM Sync: Use BPM (Beat Per Minute) to switch videos on every beat.
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- 2. Turn the BPM control to adjust BPM. A lower value switches videos slowly while a higher value switches videos quickly.
3. Press the [BPM Sync] button. Check that videos switch according to the BPM setting. You can also turn the BPM dial to adjust the switching timing at this time. Using the TAP function: Instead of numeric control by BPM, you can set the switch timing manually. Use the [Tap] button to define the timing.
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- 2. Press the [BPM Sync] button. Video switching starts at the timing shown on the BPM indicator.
3. Play back music used as the BGM and press the [Tap] button synchronously with its beat. The BPM display changes according to the pressing timing. This BPM switches videos. Reference: Setting the transition pattern to Wipe allows you to check the switching motion easily. Setting the transition pattern to Wipe allows you to check the switching motion easily."
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- How can I merge video from the channel A with video from Channel B using the Chroma key or Luminance key?
"You can apply the Chroma key or Luminance key to video from the channel A by assigning these functions to effects of the channel A. Follow the procedure below. 1. Press the [Output] button of the preview select button to show the menu screen on the monitor. 2. Turn the memory dial and set it to a position other than #1. 3. Press the [Menu] button. 4. Press the cursor buttons to select ""Effect-A"" and press the [Enter] button. 5. Press the cursor buttons to select any of ""A-Efx1"" to ""A-Efx4"" and press the [Enter] button. 6. Press the cursor buttons to select any of ""53:W-LUMIKEY"" to ""58:CHROMAKEY"". 7. After you made setting, press the [Menu] button to return to the previous screen. After completing the above setting, pressing the effect button to which the Chroma key or Luminance key is assigned applies these effects to video from the channel A to the child screen."
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- Can I change the T-bar video fader to horizontal orientation?
"Yes. The T-bar video fader of V-4 can be used horizontally or vertically. To change the direction: Remove the four screws fixing the T-bar video fader to V-4, rotate the orientation of the video fader by 90°, and fix the video fader with the four screws. "
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- We have two chrome backdrops, one blue and the other green. Is there a way that we can use both or do we need to have the same color?
You can assign different Chroma Key colors to different memory settings. Use the Memory knob to select a new memory number (such as Memory 2 - any number except 1). Then browse the Menu System Menu > Effects B > Chroma Key > Chroma Key Color. In there, you can select a chroma key color (such as Green-Cyan) to assign to Memory 2. Then, back out of the Menu, set the Memory knob to 3 and re-enter the Menu to change your Chroma Key Color to Blue-Magenta (or whatever color works best for your application). You have now set Memory 2 for Green and Memory 3 for Blue. During your event, a simple adjustment of the Memory knob will now change your Chroma Key color.
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