When using the video capture card to collect video materials, it is necessary to select the video compression format supported by the video capture card when setting the project. However, when collecting video materials through IEEE 1394, there is no need to choose the video compression format supported by hardware.
3. 1 Prepare
Before video shooting, be sure to turn on the power of the DV camera to ensure that the 1394 line is connected normally. Then turn on DV and set the mode to play (or VCR file, if you want to capture the picture you are shooting, you can set the DV status to record). After opening DV, if the connection is normal, you should find your DV device in my computer, as shown in Figure 3- 1.
After finding your DV device in my computer, I can enter Premiere Pro for video shooting.
2 video acquisition
2. 1 basic operation
To enter Premiere Pro, you must first set the project settings and select the corresponding working mode. After the setting is completed, you can click the menu command file-Capture as shown in Figure 3-2 or directly press the shortcut key F5 to start the capture window of Premiere Pro, as shown in Figure 3-3.
It is best to set the field option to no field (progressive scanning) when setting the project. As for why it should be set to no field, I will explain it later. Let's set it to no field first.
The pre-cable collection area is used to pre-cable the materials in DV tapes, and its function is the same as that of Monitor. Let's take a look at some basic tools in the field of acquisition control.
Play: Play the image of the current time code in the DV tape in the pre-wired window.
Step forward: Play one frame forward and then stop.
Back: Plays back one frame.
Fast forward: Fast forward.
Rewind: Rewind quickly.
Shuttle: It can be used for fast forward, rewind, previous frame and subsequent frame. Because the operation is troublesome and inconvenient to use, it is recommended that non-professionals do not use this tool.
Inch: used to play one frame forward (drag the mouse to the right) and one frame backward (drag the mouse to the left). The response of the tool is slow, and it needs to be dragged for a certain distance to realize the front and back frame operations.
Pause: temporarily stop the screen, and the time code stops displaying the current frame.
Stop: Stop the picture, DV player doesn't work, and the time code stops at the current frame.
Record: Record the screen from the current time code.
Slow Play: Play the contents of DV tape slowly in the pre-installed cable area.
Slow rewind: rewind the contents of DV tape slowly in the pre-installed cable area.
Scene detection: automatically detect the scene.
Next scene: automatically switch to the next scene.
Previous field: automatically switch to the previous field.
Set Out Point: Set In Point on the current screen.
Go to the entry point: Return the pre-cable screen and time code to the position where the entry point is set.
Go to the exit point: Return the pre-cable screen and time code to the location where the exit point is set.
These are some basic tools in the control field. It is necessary to be familiar with these tools before recording. You can practice a few times and get familiar with these tools before you start collecting them formally.
Scene detection is a new function of Premiere Pro, which can automatically detect the sequence of fields in DV tapes. This function is highly recommended. During acquisition, the field sequence can be easily and automatically switched through the tools of the next scene and the previous scene.
2.2 Capture Settings (Capture Settings)
There is still some work to be done before collection, that is, to make collection settings. Let's take a look at some settings in the Log tab first. Figure 3-4 shows the setup area.
In the setting area, the capture option is used to select the materials to be collected. The drop-down menu has three options: audio and video, video and audio. If you choose audio and video, you will collect both sound information and video information. If you select video or audio, only video or audio will be collected. Log clips are used to set the versatile material to be stored in the folder below the project window. The setting in Figure 3-4 is to store the collected materials in the video folder.
The next setting area is the clip data setting area, as shown in Figure 3-5.
The tape name is used to identify the tape used. When more than two tapes are used in the same project, it is necessary to distinguish the tapes. Clip Name is the name used to mark the collected clips, which is the name displayed in the Project window. Description is used to describe the clip. In large-scale multi-person collaborative projects, you need to describe the materials you use so that others can read them. The scene is used to mark the information of this field. Shot/Take is used to record the number of shots, which is very easy to understand, because all movies and TVs can't be shot at once. Log notes are used to record some contents of a fragment, similar to descriptions.
Generally speaking, the clip data setting area is used to describe clip information.
The remaining two setting areas are acquisition function areas, as shown in Figure 3-6 and Figure 3-7. Will be explained in 3.2.3 of this chapter.
Figure 3-7 Capture Control Area
After introducing the Log tab, let's take a look at the Settings tab, as shown in Figure 3-8.
The first collection setting in the Settings tab is exactly the same as the collection setting in the project settings. Click the edit button to open the project settings window, as shown in figure 3-9.
You can select the capture format in the capture format drop-down menu (if you have a video capture card, you can also select the analog capture video format in the capture format). Click the DV Settings ... button to open the DV capture option (the DV window is shown in Figure 3- 10.
DV capture options (There are two option areas in the DV window, namely preview setting period and capture setting period. Their specific functions are:
The function of desktop preview video is to synchronize the video content in the pre-wired DV tape to the acquisition window when pre-wired in the acquisition window of Premiere Pro.
The function of desktop preview audio is to synchronize the audio content in the pre-wired DV tape when pre-wired through the collection window of Premiere Pro.
◇ pre-cable video on display is used to synchronously display the video content in the DV tape on the acquisition window of Premiere Pro during the acquisition process.
◇ Desktop preview audio (pre-wired audio on the display) is used to synchronously display the video content in the DV tape on the acquisition window of Premiere Pro during the acquisition process.
The above is the setting in the snapshot setting, and the setting area below is the snapshot position, as shown in Figure 2- 1 1.
In the shooting location setting area, video refers to the location where the shot video file is saved; Audio refers to the location where the collected audio files are saved. You can click here.
Browse button through the graphic menu to select the corresponding storage location, as shown in figure 2- 12.
The last setting area is the equipment control setting area, as shown in Figure 2- 13. The device control setting area is mainly used to set the properties of hardware devices in the acquisition process.
#p# Subtitle #e#
◇ Equipment: There is only one option for DV equipment control in the equipment, that is, the DV control equipment that comes with Premiere, and there is no need to change it. You can click the option button here to set the model, acquisition format and current status of DV equipment, as shown in Figure 2- 14.
In Figure 2- 14, the role of video standards is to set working standards, and the equipment brand refers to the manufacturer. The manufacturer in the above figure is JVC. Device Type Displays the model of the currently connected device. If there is no DV you are using in the device type, you can use it by setting the device type as a standard. Time code format is used to mark the recording status of DV. Non-frame dropping is a standard setting, so it doesn't need to be changed, because no one wants to have shortcomings here and there when shooting.
◇ Current device: used to display the model of the currently connected device. The DV model shown in figure 2- 13 is JVC GR-DVL-9600E. If the currently connected device is Sony's PD 150 camera, the current device will be displayed as Sony PD- 150.
◇ Rollforward Time: directly connected to the screen of DV in the next few seconds (the specific time value is set in the text box after the rollforward time, in seconds).
◇ Time code offset: the length of time code offset after connecting DV.
Finally, there is a check box to stop capturing when frames are lost, and its function is to automatically stop capturing if there is contention in capturing. I think it's best not to select this check box, because even if there are lost frames, they will be displayed in the acquisition state.
In the film and television industry, the value of Preroll Time is generally 2 seconds, that is, the picture is taken 2 seconds in advance for later processing.
There are many reasons for frame dropping, such as fragmentation of disk space, low speed of hard disk and poor computer configuration. Especially in Windows operating system, it is easy to cause fragmentation of disk space, so it is necessary to defragment the disk regularly.
Well, this section mainly introduces some basic settings before collection. Only by understanding the above contents can the work be effectively completed, so you should be fully prepared before doing any work. Let's cut to the chase and see how Premiere collects materials.
2.3 Start collecting
First of all, let's talk about the general operation flow of the whole collection. The purpose of collection is actually very simple, that is, to collect as much effective content as possible and collect less unnecessary content. Therefore, in this process, it is necessary to repeatedly pre-wire the collected materials, set the access point (set the in/out point), and then collect the effective content in the access point into Premiere for editing. This is a very detailed collection process. There are also some very rough collection methods, such as setting in/out points for the whole field by using Scene Detect, and then collecting the whole field into Premiere for editing; Or just click the record button to collect all the contents of the current DV tape into Premiere for editing. No matter which collection method you use, as long as it suits you, don't blindly pursue things that are too perfect, it will be very tiring, and the collected materials still need to be edited in Premiere, so you can completely cut off those unnecessary contents in Premiere.
Then, you can start the picture capture window, click the play button, and then you can see the content and related information of the picture being played in the pre-requested area, as shown in Figure 2- 15.
It is necessary to repeat the pre-cable connection frequently, and then set the in point by clicking the "Set In Point" button in the acquisition control area or the "Set In Point" button in the timecode control area.
When setting the access point, the pre-wiring screen should be suspended, as shown in Figure 2- 15. Then through one step forward (the previous frame) and one step backward (the next frame), the picture goes back to the place you want to collect frame by frame.
When you return to the position you want to collect by going forward and backward, you can set the in point by pressing the Set In Point button or the Set In Point button. As shown in figure 2- 16.
After putting in the point, use the same steps and operations to put the point. After setting the exit point, you can see the details of the access point in the timecode control area, as shown in Figure 2- 17.
The leftmost time code is the time position of the current time pointer, the time of setting the in point is slightly on the right, and the time of setting the out point is on the side; The rightmost time code is the sum of the time between the set in point and the set out point, that is, the total time length of the in/out acquisition. After everything is ready, you can click the entry and exit button in the threatened Chinese fir _ Play _ Capture control area to collect the materials for setting the entry and exit points, as shown in Figure 2- 18.
In figure 2- 18, in the current acquisition state, the acquisition of "United Clip 02.avi" is displayed at the top of the pre-cable window (marked with light red), and pressing Esc to stop recording means that the clip "United Clip02.avi" is currently being acquired, and pressing ESC to stop recording. CaptureDuration: 00: 00: 13: 2 1 (lost frame 0) indicates that13 seconds in 21frame are currently collected (if lost frame 0, there is no meaning of losing frame). Remaining disk space: 9.38 gigabytes (44.0 minutes) means that the current collection disk space is 9.38GB (44 minutes of AVI content can be collected). We must pay attention to the changes of these data when collecting, especially when there is not much disk space left and frames are lost, we must pay attention to the changes of parameters and take corresponding actions.
Let's explain the difference between In/Out (access point) and Tape. In/out acquisition refers to the acquisition that starts with setting the time code of the in point and then stops when setting the time code of the out point. The total length of the collected material is the difference of the time code length between the in point and the out point. For example, the acquisition mode shown in Figure 2- 18 is input/output acquisition. It sets the time code of the entry point to 00:0 1:25:06 and the time code of the exit point to 00: 02: 06: 06, so if the entry/exit is collected, the total length of the collected material is 00: 02: 06: 00: 0 1: 25. This is the working mode of In/Out acquisition mode, which is characterized by accurate control. The working mode of the tape acquisition mode is particularly simple, that is, the acquisition starts from the current time code (for example, the current time code is 00:0 1:25:00, and the acquisition is here, and the time code is 00:02:25:00 at the end of the acquisition, so the total length of the entire acquisition material is 00: 02: 25: 00-00:. The characteristic of tape collection is "fast", but it is much more troublesome to deal with later, but generally experienced people will use tape collection because it can collect materials quickly.
Well, basically the collection operation in Premiere Pro is over. Generally speaking, the operation is simple, but it is powerful. Therefore, using the collection tools and functions provided by Premiere Pro can be competent for any collection work, just depending on the user's attitude towards it. Of course there will be mistakes. After all, different people have different views, so I hope readers can find a collection method and working mode that suits them.
Conclusion:
1: It is best to set the field option to no field (progressive scanning) during engineering setting. As for why it should be set to no field, I will explain it later. Let's set it to no field first.
2. When setting the project, it is best to set the field option to no field (progressive scanning). As for why it should be set to no field, I will explain it later. Let's set it to no field first.
3. Scene detection is a new function of Premiere Pro, which can automatically detect the sequence of fields in DV tapes. It is highly recommended. During acquisition, the field sequence can be easily and automatically switched through the tools of the next scene and the previous scene.
4. In the film and television industry, the value of Preroll Time is generally 2 seconds, that is, the picture is taken 2 seconds in advance for post-processing.
5. There are many reasons for frame loss, such as fragmentation of disk space, low speed of hard disk and poor computer configuration. Especially in Windows operating system, it is easy to cause fragmentation of disk space, so it is necessary to defragment the disk regularly.
6. When setting the access point, it is necessary to pause the cable pre-laying screen, as shown in Figure 2- 15. Then through one step forward (the previous frame) and one step backward (the next frame), the picture goes back to the place you want to collect frame by frame.
#p# Subtitle #e#