Documentación Taller RePlay

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EL OBSOLETO MUNDO DEL VÍDEO ANALÓGICO.

FORMATOS DE VÍDEO ANALÓGICO


1.Formatos profesionales.

  • BETACAM. Ancho de cinta de 1/2 de pulgada. Graba la señal de vídeo por componentes. Calidad broadcast.
  • MII. Ancho de cinta de 1/2 de pulgada. Señal de vídeo por componentes. Igual que el Betacam.

2.Formatos semiprofesionales.

  • U-MATIC. Ancho de cinta de 3/4 de pulgada.
    Señal de vídeo por separado,Y/C.
  • Hi-8. Ancho de cinta de 8mm .
    Señal de vídeo por separado, Y/C.
  • S-VHS. Señal de vídeo por separado, Y/C. Ancho de cinta de 1/2 de pulgada. Compatible con VHS en lectura. Podemos leer una cinta VHS en S-VHS pero no al revés. ( VHS mejorado )

3.Formatos domésticos.

  • VHS. Señal de vídeo compuesto. Ancho de cinta de 1/2 pulgada.
  • VHS-C. Como el VHS pero en mini cassette. Hace falta un adaptador que es una cinta grande donde se introduce la pequeña para que se pueda leer en un reproductor VHS.
  • Betamax ( beta) Ancho de cinta de 1/2 pulgada.
  • V2000. Cinta reversible. Ancho de cinta 1/2 pulgada.
  • Video8: Versión doméstica del Hi-8.


TIPOS DE SEÑAL DE VÍDEO.


La señal de vídeo es generada, transmitida y grabada de diversos modos. Aquí un listado de los tipos de señal en función de la calidad. De mayor a menor.
Cada tipo de señal tiene sus correspondientes cables con el mismo nombre que los tipos de señal.

  • Señal RGB. Los tres colores rojo verde y azul viajan por separado.
  • Señal por componentes. Estandar de producción y distribución broadcast
    ( Usease, profesional) Se compone de la RGB codificada respecto a la luminancia, Y, R-Y y B-Y. ( también tres cables)
  • Vídeo por separado. También llamado Y/C o S-Vídeo. ( un cable con
    cuatro pines ) La luminancia y la crominancia viajan por separado.
  • Vídeo Compuesto. Toda la información viaja en un solo cable. ( el típico cable de video amarillo)



ESTÁNDARES DE SEÑALES DE VÍDEO

El Nuestro es el PAL. Lo más probable es que también aparezca en algún momento
Alguna cinta generada en NTSC.

  • NTSC ( Nacional Televisión Standards Comité)
    Número de frames: 29.97fps
    Resolución: 525 líneas
    Estándar: USA, Japón y América
  • PAL ( Phase Alternation Line):
    Número de frames: 25 fps
    Resolución 625 líneas
    Estándar: España, Gran Bretaña, Alemania, Holanda
  • SECAM ( Sequencial Couleur Avec Memorie)
    Número de frames: 25 fps
    Resolución 625 líneas
    Estándar: Francia, Europa del Este
  • PAL M
    Número de frames: 30 fps
    Resolución 535 líneas
    Estándar: Brasil

TUTORIAL == RACK FOR MANAGEMENT OF AUDIOVISUAL HEMEROTECA ==

1. IDENTIFICATION OF THE ELEMENTS THAT MAKE UP RACK

RACK CABINET 1.1. A rack is a metal frame designed to house electronic equipment, computer, audiovisual .... with a standard width of 19 inches while the height and depth are variable to suit different needs. It has horizontal guides where you can support the equipment as well as anchor points for the screws that secure the equipment to the frame. In our case we added support trays that allow non-standard equipment. For example, a monitor, or the different audio and video players.

More info: http://es.wikipedia.org/wiki/Rack

VIDEO PATCH PANEL 1.2. A video patch enables us interconnectivity between multiple computers without needing to tinker behind the rack. It is a way of worry for the wiring. Allows you to change the connection between the teams from the front of Patch quickly and easily.
Our patch has 16 BNC ports. Coaxial connectors have BNC female connector on both sides of the panel, which are directly connected cables terminated BNC male on both sides, without welding or special connections. These connectors, the back patch is permanently assigned inputs and outputs audio and video of the different teams. The front of the patch is used to interconnect equipment as needed.
PATCH PANEL.jpg

1.3 HOSE BNC. They are just three flights of vídeocoaxial 40cm cable with BNC connectors (female) at the ends. The three wires are different colors and assign a color to each of the 3 signals we want to interconnect. These three signals are: a video and audio 2.

File:HOSES BNC.jpg


1.4 WIRING. The cables we use to interconnect the computers are popular C3% ADdeo_compuesto COMPOSITE VIDEO we all have in our homes.

RCA.jpg

Thus, yellow is used to carry the video signal and the white and red for audio signals (the three wires are the same, only not to confuse assign colors to connect for example a video output to an audio input ...) Sometimes also use it to transmit video signal, the odd cable S-VIDEO. To scan the material we use the popular cable Firewire (IEEE 1394) which has one end of four and a six pin.

1.5 ADAPTER BNC ( female). Are placed at the end of the cables C3% ADdeo_compuesto COMPOSITE VIDEO going to the back of the Patch.

BNC.jpg


EQUIPMENT 1.6 ANALOG / DIGITAL

- Player D8, Hi8 and Video 8.
- VHS player.
- VHS-C adapter. VHS tape-like where you enter the small-compact VHS tape that can be read in a VHS player.
- BETAMAX ....
Player - Player HDV minidv ... This in turn will serve us bridge between the analogue and the computer you're going to digitize the material.
- Digitizer slides and negatives.

MONITOR 1.7. Its function test we have done successfully patching equipment. I play the audio and video material that we want to capture. (If this does not happen it is likely that we have erred in making connections in the Patch)

1.8 COMPUTER. Next to the rack and connected to it with a Firewire cable (IEEE 1394) With it we will make the catch of audiovisual material. The capture and editing software of such material is to be determined as a development tool that enables the housing material and routing function needs, and accessibility.


=== 2. HOW TO CONNECT THE ELEMENTS THAT MAKE UP RACK ===

OUTPUT (OUT) and inputs (IN) OF THE PLAYERS. There is a common denominator in all playback equipment that make up the Rack The back of each one of them has at least three female RCA outputs with which we can extract the video signal (yellow connector) and the two audio (red and white connectors .) The players also have entries, for example, we can send the signal from a VHS to another VHS tape to double ... or record content onto a DVD recorder without capture.

LINE OUT pequeño.jpg LINE IN pequeño.jpg

CONNECTORS PATCH. Our PATCH has only two rows of connectors. One above and one below. So let's use the top row to receive audio and video signals of different teams. And the bottom row we use it to send that signal to our HDV player (who will serve as a bridge between the analogue and the computer you're going to digitize the material.)

COMPOSITE VIDEO CABLES. The cables we use to connect the computers are popular with COMPOSITE RCA male-male connection at both ends. The most suitable for these cases are what are grouped in three different colors: YELLOW RED AND WHITE (in its individual cables can be used separately ... but it is very messy and impractical). We will use some RCA-BNC adapters to connect the end going to the PATCH.

Interfacing with PATCH. We choose for example the VHS player and connect our 3 video cables and audio outputs of this.
Three RCA connectors that are free in the other end, we placed three RCA-BNC adapters. Then connect them to the rear PATCH, for example in the first three pins on the top row, which is that used to receive signals. We note that information I have even from the front label to not forget. We repeat the operation with the other teams and give each its place in the top row of PATCH.

We on the other hand our HDV player that is going to be a bridge between the analogue and the computer you're going to digitize the material. We connect yellow wire to the red and white inputs on the back of the player (RCA IN).
Three RCA connectors that are free in the other end, I placed three RCA-BNC adapters. After we connect to the rear PATCH, for example in the last three pins on the bottom row (row we use to send signals to other players). We can repeat the operation with the other teams assigned to each output (OUT) his place in the bottom row of PATCH, but to digitize analogue audiovisual material is not necessary. (It would only be necessary if we want to connect multiple analog equipment together.)

Finally, we attach our device to monitor for HDV is getting the picture and sound of different devices. This threw three RCA composite video cables (yellow, red and white) from the output (OUT) of HDV to monitor entries.

We make all connections with labels on the front of the Patch. We
as an example the two teams that have connected before,
Ex: VHS (VIDEO OUT), VHS (A1 OUT), VHS (OUT A2) in the top row, and HDV (VIDEO IN), HDV ( A1 IN), HDV (A2 IN) in the bottom row.

Finally connect the two devices together with the three HOSE BNC.

File:PATCH WITH LATIGUILLOS.jpg


GANGAUR

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'3. HOW TO CAPTURE THE MATERIAL IN OUR COMPUTER '

To scan or transfer the material from the various teams that rack up the need:

- Computer with Firewire port built.
- Video tape recorder connected to your computer by Firewire cable. Passing through it all audio and video equipment.
- Capture Software.


The software we use for the catch is Kino, a free program nonlinear editing digital video. This will help us to easily capture our sequences and result in a digital file. Dv.


1. Open the program icon on the desktop.

2. In the right column click in the tab "Capture".

3. In the bar below the video preview encotramos us with different buttons:


• AV / C: on or off deck control from the program.
• Capture: Start the video capture process.
• Stop: stops capturing we are doing.
• Instant hits a frozen frame of the catch is being given.
• Mute: Turns audio from video.

We can also fast forward, rewind, pause and resume capture ongoing controls to the bottom row of buttons as above.


4. The resulting file is generated in the "workshop". It's a format. Standard DV for editing in a simple but we later to another type of digital file if you need.

5. We can use the file!


Video 043.png