Name: Lab Date and Time: Email Username: Partner s Name: CSC 101: Lab #8 Digital Video Lab due date: 5:00pm, day after lab session Pledged Assignment: This lab document should be considered a pledged graded assignment, as specified in the CSC 101L syllabus. When outside of the lab session, external help on graded aspects of the lab should only be obtained from the instructors or graduate teaching assistants. Purpose: The purpose of this lab is to provide you with hands-on experience in digital video manipulation techniques using the Adobe Premiere Pro video editing tool, as well as to reinforce some of the ideas from lecture about digital video. Specifically, your objectives for this lab are: Building a skill set in digital video: 1. Assemble captured video clips in Adobe Premiere Pro 2. Add an audio track 3. Trim video footage 4. Use transitions between video clips 5. Create and super-impose a title on the video clip 6. Export an edited video to DVD and Quicktime formats. Relating to class/lecture: 7. Compare the effects of different frame sizes, frame rates, audio sampling rates, codecs, etc on video quality and video file size. Premiere Pro Licensing and Lab Partners As indicated in the pre-lab, we will work with the Adobe Premiere Pro video editing program. This program requires being connected to the WFU network. You will need to be connected by a wire to the campus network, be connected to the Student wireless (not Guest) network, or be using the VPN if off-campus. Wake Forest only has about 18 Premiere Pro licenses for use by all members of the campus community. With 30 people in each CSC 101 lab, it is not possible for everyone to have their own copy open. For this lab, you should pair-up with any other one person member of your lab section (work in twos, not anything bigger). Each person should submit a completed lab handout, but only one team member needs to submit the movie file created during the lab. Make sure to include your partner s name at the top of your lab. Please close Premiere Pro when you leave lab. Lab Instructions Premiere Pro is a large program that uses a significant amount of computer resources. Some actions may take longer than you expect to complete be patient! If you are using Premiere Pro CS4 on a T400 and Vista (should be sophomores and seniors), please ask one of the instructors to help set up things correctly otherwise exporting files at the end of the lab may not work! Create a Project and Import Movie Clips 1. Start Premiere Pro (see the pre-lab if you don t remember where to find it). After several moments select New Project on the welcome screen. 2. Choose as your Location the lab8 directory under your CSC101Lab folder that you created in the Pre-Lab (where you saved the movies that you downloaded from the web) and set the Name to lab8. See Figure 1 on the next page for examples of these. Hit OK to move to the next window.
Setting the Location and Name (Figure 1) 3. Choose the following Project Settings: DV NTSC, Standard 48KHz, BUT DON T CLICK THE OK BUTTON YET. See Figure 2 below to make sure you are choosing the right settings. These are the right settings for us to use as the files you will be working with are from a standard digital video camera (NTSC format, 30 frames per second) with standard audio. Before you hit OK, answer Question 1 below. Setting Project Type (Figure 2) Question 1: (6 points [1.5 each]) Before you click OK, find and record the following information about your video project from the Description Pane of the New Project window: A. Video Frame rate = frames per second B. Video Frame size = horizontal (h) x vertical (v) pixels C. Audio sampling rate = Hz 4. Import at least three of the clips you downloaded in the Pre-Lab into Premiere Pro using the File, Import menu command. These clips should show up on the Asset List for your project. 5. Also import the Heres_To_Wake_Forest.wav audio file to your project s Asset List. Create Your Movie 1. Assemble the video clips in any order you like on the Timeline by dragging clips from the Asset List into the Video 1 section of the Timeline window. You may wish to use the Zoom control at the bottom left of the Timeline window to make it easier to see your clips in the timeline. Use at least three video clips and place them adjacent to each other. 2. Use the trimming tool to shorten any clips that you feel are too long. After trimming your clips, move them as necessary to ensure that they are still adjacent to each other. 3. Save your project file (as lab8.prproj). 4. To preview your video, click the Play button in the Program Monitor window (top right of screen). If the Program Monitor is not showing, select the Window, Program Monitor menu
option. The playback may appear somewhat jerky this is normal, as the files we are working with are large and the laptops are not the most powerful computers in terms of resources. 5. Add the Heres_To_Wake_Forest.wav audio file as a sound track for the video. Drag this file from the Asset List to the bottom of the Timeline window, creating a new Audio track. Choose a reasonable position in your timeline so that it makes sense within the context of the video clips. 6. Save your project and preview it. 7. Click the small triangular button on the Audio 4 track to view the waveform of the sound file you have just added. Question 2: (6 points) This question actually relates back to the topic of digital audio (audio is an important part of digital video!) Compare the waveform of the Heres_To_Wake_Forest.wav audio to the waveforms of the audio parts of the video clips (shown in the Audio 1 track of the Timeline). Which of the following statements are false? (Circle any and all answers which are false) A. The maximum amplitude used in the wav file is very close to the max amplitude seen in the audio components of the video clips. B. The wav file does not show any signs of clipping of the waveform. C. The video clips have stereo sound (left and right channels), while the wav file is monaural (one channel). 8. Introduce transitions between your video clips. You may choose any transitions you like, but use at least two different transitions, one between each different clip. NOTE: If you get a message about insufficient video and/or repeated frames, answer OK to this complaint DO NOT HIT CANCEL, as this will make a permanent change to some program options in Premiere. 9. Save and preview your project 10. Note that sometimes the preview window can t keep up with the video and appears to get stuck. This is especially true around transitions. We can help avoid this by pre-rendering the transitions that you added. Click on the Timeline section of the interface, and then select the Sequence, Render Entire Work Area menu command to render the transition frames. Notice that the red lines near the top of the timeline window (near the transitions) change to green to indicate pre-rendered frames. 11. Save your project and preview it. 12. Feel free to further adjust your movie to make it more interesting. Be creative! Question 3: (9 points 1 each, except C,E 2 pts each) Right click on any one of the video clips in the Video 1 bar of the Timeline and select Properties from the pop-up menu. Use the information displayed to answer the following: A. Frame rate: frames per second (round to nearest whole number) B. Duration of the video clip using the time-code: C. Duration of the video clip in seconds: (Remember how to convert frames to fractional seconds, as discussed in the pre-lab). D. File size of the video clip: MB E. Average data rate: MB/second F. Is the data rate (D) about equal to the file size (C) divided by duration (B)? a. Yes b. No G. Average data rate per frame (answer E divided by answer A): MB
Question 4: (10 points [3,2,5]) As you know from lecture, digital videos are essentially just lots of digital images shown in order very quickly. Let s think about how much data one frame of video uses compared to a similarly sized still image: A. Data used for a 720x480 still image with 3-byte RGB color coding? (show your work) In bytes: In megabytes (MB): B. Compare your answer from Question 3.G to the one above for 4.A which answer is smaller: the data for the movie frame or for the still image? Indicate which one and explain why you think this is the case. Add a Title to your Movie 1. Choose the File, New, Title menu option and hit OK on the first screen that appears. 2. Use the Type Tool to create and position a new title that you will later add to your movie be creative! If you wish, you can change the title s font, size, color, style, etc. 3. Close the Title Window when you are done. Your title will now show up as another asset on your Asset List. 4. Superimpose your title on the video you are creating. To do so, drag the title from your Asset List onto the Video 2 track in the Timeline window. Choose a position in the timeline that fits with the video you are creating. You can also shorten or extend the title s duration by dragging its end points as you did earlier with the regular video. 5. Feel free to add more titles if you want be creative! 6. Before previewing, remember to click on the Timeline area and use the Sequence, Render Work Area menu option so that the added titles will be pre-rendered. 7. Save your project and preview it. If you get here during lab, have the instructor or TA verify that you have completed this step of the lab without any problems. Export the Finished Video as a Quicktime Movie Adobe Premiere has a number of popular codecs available to choose from for compressing your movie into a digital video file. We will first experiment with Apple s Quick Time codec. If you have a T400 with Premiere Pro CS4 and there is an error in how it is setup, we should see it here! 1. Click on the Timeline window so that it has an orange outline as shown at right. Choose File, Export, Media You should see a Settings pane. If not, find and click the Settings button.
2. Set the values in this window to match the screen image shown at right. You may need to hit the double-downarrow button to see the settings at the bottom of the image below: Change the format to QuickTime first. Don t attempt to change the Preset field to Custom. It will change for you when you make other changes. Make sure to set the Output Name as qt-720x480-30fps.mov (click on the orange name already there to change it) and set it to save in your lab8 folder. 3. After your settings match all of those shown at right, click the OK button and wait a bit as the video is rendered (another program should open to do this part for you; if so, click Start Queue in that new program). 4. You may now view your movie outside of Adobe Premiere by going to your CSC101Lab\lab8 folder and double clicking the qt-720x480-30fps.mov file you just created. As you watch the Quicktime movie, make a mental note of the overall quality of the movie, including such things as image size and clarity. 5. Repeat steps 1-4, but now change the settings so they match the ones at right. Note this is a smaller frame size, lower quality, and fewer frames per second movie, as evidenced by the different settings this time for Frame Size, Frame Rate, and Quality. Make sure to set the name as qt-180x120-15fps.mov.
Question 5: (14 points [1,1,1,2,2,2,5]) a. Looking in Windows Explorer, in your CSC101Lab\lab8 folder, record the file sizes of the two QuickTime files you have created: qt-720x480-30fps.mov: MB qt-180x120-15fps.mov: MB b. () Using Adobe Premiere s preview window (not Windows Explorer), how long is the run time of your video? Remember that the project, from which this time is shown, is set to 30 frames per second. In the format hours;minutes;seconds;frames: In seconds: c. (2 pts) Using the information above, what are the MB/second rates for your two videos? qt-720x480-30fps.mov: MB/second qt-180x120-15fps.mov: MB/second d. Compare the relative quality of your two Quicktime movies and their relative file sizes. Indicate whether you believe the advantage gained in getting a smaller file is worth it, given the quality of the two different videos and the difference in file sizes? Export the Finished Video as a DVD Movie Premiere Pro can export your movie in the format used to create DVD discs, a process which uses the MPEG2 codec (compression /decompression tool). This involves separating the audio and video into separate files. (Creating a complete DVD also requires creating other files, but we won t be concerned with those). 1. Click on the Timeline window so that it has an orange outline. Choose File, Export, Media as you did before. In the Settings window, set the format as MPEG2-DVD, the Preset as NTSC High Quality, and the name as dvd-movie.m2v. Leave everything else set as the default values. 2. After the rendering has completed, you should see two new files in your CSC101Lab\lab8 folder: dvd-movie.m2v and dvd-movie.wav. These contain the video and audio parts of the movie respectively. You should be able to play the dvd-movie.m2v file by double clicking it. Make a mental note of the overall quality of the movie, including such things as image size and clarity relative to the original Quicktime you generated. Also think - is there anything missing when you watch the movie, and, if so, why is it missing? 3. You can now close Adobe Premiere Pro!
Question 6: (10 points [5,5]) a. Based on the combined size of your dvd-movie.m2v and dvd-movie.wav files (add them together) and the run-time in seconds of your video (from 5b), estimate how many minutes of such a DVD movie you could fit on a 4.7 GB (4700MB) DVD disc. Show your work/calculations to get full credit. b. Does your answer to Question #15 suprise you with respect to how many minutes of a DVD-formatted movie can fit on a DVD disk? Why or why not? Question 7: (5 points) Using DVD-style compression, we were able to obtain pretty good levels of compression (as shown by Question 6 above). I would argue that there was quite a lot of action in the clips you worked with the camera moved around a lot, and the events captured involved a lot of activity. Given what you know from lecture, indicate whether or not this increased or decreased the amount of compression that was able to be achieved for the video. Submission In today s lab, you created a number of video and audio files in your CSC101Lab\lab8 folder. Because video files are large, we want to move just the smallest file over to be graded. Accordingly, upload into Sakai only your qt-180x120-15fps.mov movie from your CSC101Lab\lab8 folder. Please write down your lab partner s name on the front page of this lab and double check the content of your video matches the expectations from the lab instructions. The next page provides a gradesheet to allow you to ensure you have met all of the video requirements. Remember both students should turn in a lab document, but only one video needs to be uploaded.
CSC 101 Fall 2011 Lab #8 Report Gradesheet Your name: Name of lab partner: Topic Points Notes Pre-lab questions 20 total - 5 at 4 points each Lab-report questions 60 total (points listed on questions) Submitted Video File Grading (20 points total) Recorded on pre-lab. Minimum of three different video clips used. At least two different video transitions used. Here s to Wake Forest added to audio track At least one Title added to the video File is in Quicktime format Total: of 80 for lab report