The role of the 1394 card is only to transfer data like a hard disk interface.Unlike MPEG capture cards, video compression hardware is required.The DV format is also a compressed format, but this work is done in the camera.Even if there is compression encoding hardware on the 1394 card, it only works when it is edited and generated.It does not work when capturing.
2. YesDo you use a capture card to capture DV format?
Answer: Yes,VideoStudio is best collected in avi format, or DVD, so that the clarity can be guaranteed. 3. Question: What is TI? What is VIA?
Answer: TI stands for Texas Instruments, a veteran chip manufacturer, which develops and produces various chips, including 1394 chips; VIA stands for VIA, which also produces 1394 chips.
In addition to TI and VIA, there are many companies such as LUCENT, AGERE, NEC and other companies that produce 1394 chips, but TI and VIA chips are the most common in the market.
4. Q: Is it better to use the 1394 card with TI chip or the 1394 card with VIA chip?
Answer: This question cannot be answered simply. Generally, manufacturers have a variety of products. TI has produced a variety of 1394 chips, and VIA has several types. There are many differences between the old and new chips. In theory, chips that follow the same technical standard have the same functions and performance indicators, but the design, cost, and actual performance are different.
In particular, it should be noted that, because of the different levels of board manufacturers, boards using the same chip will have very different performances such as compatibility and stability.
5. Q: Regardless of the actual board and chip, can you compare it?
Answer: Generally speaking, it is TI>LUCENT（AGERE）>VIA>NEC.
6. Q: Merchants say that dual chips are better than single chips, right?
Answer: In terms of function, dual-chip and single-chip are the same, but the design is different. Single and dual chips follow the IEEE 1394A standard, and the realized functions and performance are also standard, there is no difference. Moreover, both TI and VIA have produced single and dual 1394 chips respectively. There is no difference between single and double chips from the same manufacturer. Therefore, it is not possible to evaluate whether it is good or not with single or dual chips.
7. Q: The merchant says that certain 1394 cards are hard-compressed, right?
Answer: As mentioned earlier, the 1394 chip complies with the IEEE 1394A standard and has no additional functions. Therefore, no matter what kind of 1394 card does not have the hard compression function, the 1394 card that can collect MPG in real time is realized by software.
8. Q: There is a power connector on my 1349 card. What is it for? Do you want to connect it?
Answer: The 1394 card is not only used to capture DV, but also can be connected to various 1394 devices. If some 1394 devices require a lot of power, and the device itself does not have an external power supply, you can connect the power port on the 1394 card and supply power to the device through the 1394 card. It is not necessary to connect it for general use.
9. Question: My 1394 card is installed normally, the IEEE 1394 bus device is displayed in the "Device Manager", the 1394 cable has also been tested and it is good, and the operating system is no problem.（98SE, 2K, XP）, Why is there no response when connecting to DV?
Answer: There are several possibilities for this situation:
1）, Whether the capture card is not installed properly, whether the device manager is normal, re-plug the card, and install the driver wizard to check whether the system components are complete;
2）, If the system is Ghost, it is recommended to change it first, the pure version system;
3）1. There is a problem with the 1394 card interface. Try another oral test, or plug it back and forth several times, restart the computer, and reconnect;
4）, There is a problem with the DV''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s 1394 interface. This situation is relatively rare;
5）1. For the 1394 line problem, some cameras have certain requirements on the line. It is recommended to replace the line and try;
10. Question: Some people say that as long as the 1394 card can be used, the function is the same anyway. Is this idea correct?
Answer: In theory, the functions and performance of cards that follow the same technical standard are the same. However, in accordance with the IEEE 1394 technical standard, in order to ensure safe and stable connection of 1394 devices（Including DV）, Qualified 1394 cards have rigid requirements in design, workmanship, and materials.
11. Q: What should a good 1394 card look like?
Answer: A good 1394 card should do several things:
On the chip, choose TI, LUCENT（AGERE）, VIA and other major manufacturers of chips, these major manufacturers are the first to develop 1394 chips or more research and development, mature technology, excellent performance in all aspects.
For wiring and materials, use self-recovery insurance, enclosed choke inductors, and voltage regulator ICs（PWM）, Aluminum capacitor（Tantalum capacitor）. These components can fully guarantee stability and safety.