Recording and Editing Lectures / Presentations

DMC staff helped to record and edit Fondren Fellows Showcase on April 6, 2017. Below is a summery of recording set up and editing techniques:

Recording:

Equipment:

The camera was mounted on the tripod, the rode shotgun mic was mounted on the camera using the mounting bracket that comes with the mic set.
the setup for mic, camera and tripod

The camera:

  • Recording mode – Auto
  • Video
    • video format – AVCHD (i.e. H.264)
    • video quality – FXP (i.e. Resolution – 1920×1080, Bit Rate – 17Mbps, Frame Rate – 60i). For a 32GB memory card, the recording time is 4 hours.
  • Audio
    • when an external mic is connected to the camera’s Mic port, the audio input level indicator will be displayed on the LCD screen automatically, even in auto mode.
      audio level indicator
    • A good audio input level should fall between -12db and 0db. 

The mic:

  • The high-pass filter was selected  and the audio level switch was set to 0dB since the audio meter on the camera LCD monitor showed the level was good and fell between -12dB and 0dB.
  • If the speaker’s voice is low and the audio meter drops below -12dB when you are monitoring the audio level, you may consider to switch to +20dB to boost recording level.
  • For more information about the Rode Shotgun microphone, please refer to the following note: “Easily accessible on the rear face of the microphone are the power, the level controls and a selectable high-pass filter at 80 Hz. The filter will prevent low-end noise such as air conditioners and traffic from being recorded. Furthermore, the -10 dB (or pad) is suitable when recording loud sound sources such as live music, motorsports, or interviews, where the subject is very close to the camera. There is a +20 dB level boost designed for use with DSLR cameras, so the user can reduce the camera’s preamp level, effectively reducing the amount of noise generated by the camera’s audio circuitry.”

Note: If you are familiar with camera settings, you may also choose P mode on the camera so that you have more controls such as adjusting audio input level manually.

Editing:

The recording was imported into Final Cut Pro X and split into three segments. Trim tool was used to remove unwanted clips. Title, transition, and lower third were added to each segment. Each final video was exported as Master File for Apple Devices with the highest resolution (1920×1080) as .m4v format. Apple Devices format is suitable for web upload or longer videos as it reduces the file size while maintain decent audio video quality.

See the videos at https://www.youtube.com/playlist?list=PLJ6BYcLAShRqqQl-P8mj2YiENCUVBkpri

Things can be improved:

The video quality can be improved by setting up two cameras with one focusing on the slides and the other focusing on the presenter. However, muti-cam editing will be involved in the post production phase thus more time is required for editing. It depends on user’s recording need, if a simple recording and editing is what they need, you may refer to this case’s set-up, however, if both presenter and the information on their slides are important to be recorded with better quality, then using two cameras to record can be considered.

Using Tableau Public to Visualize DMC Equipment Circulation Data

Thanks to the great help of Mang Sun, system librarian, DMC is able to offer its first workshop on Tableau Public in Spring 2017. The Introduction to Tableau Public workshop uses the DMC equipment circulation data as a sample data set to explore basic features and functions of Tableau Public.  You could tell the equipment checkout trend, patterns, and interesting findings based on the data of 2014, 2015, and 2016.

Here is the link to the published Viz.

Below is the embedded published Viz. Scroll down to the bottom of the Viz, click on the full screen icon at the lower right corner to see the beauty of the chart.

Using DMC Equipment to Take Pictures for a Research Paper

Adam Lauchner, a graduate student from Halas Lab, applied physics department at Rice University, used a DMC Canon T3i, a Canon Wide Angle EF 28mm f/1.8 Lens, a tripod, and a lighting kit to take pictures of devices in his lab for a paper that was recently published at http://pubs.acs.org/doi/abs/10.1021/acsnano.7b00364.

Below is an example of the images in the paper. A news article about this research can be found at http://news.rice.edu/2017/03/08/rice-lab-expands-palette-for-color-changing-glass-2/ .

Compare Camera Built-in Mic, Zoom H4n and H2n Audio Recorder, External Shotgun Mic from Canon XA10 camera, Rode Condenser Shorgun Mic

When recording voice using DMC microphones, Rode Condenser Shotgun Microphone seems to yield the best quality. Zoom H4N audio recorder is too sensitive, therefore static noises are noticeable. Camera built-in mic record less statics, but the audio does not sound as clear as Rode mic.

When recording music performance using DMC microphones, Zoom H4N audio recorder is still highly recommended. It preserves more information thus keeps the fidelity of music. Zoom H2n is a second choice, it can record clean good audio, but compare to H4n, the audio sound thin, not as rich as H4n.

See below diagram for detailed set-up of each device for this testing:

Using Juxtapose for Before/After Image Comparisons

The DMC will offer a custom in-class workshop of Using Juxtapose for Before/After Image Comparisons to HRC Spatial Humanities class at the end of January. JuxtaposeJS is one of a series of tools for content creators produced by the Northwestern University Knight Lab. It is a JavaScript library for making before/after image sliders. When preparing the workshop, Jane collected a few photos of before-and-after-DMC-move-to-FondrenB42. Take a look at the interesting photos below and learn the DMC location/space change over time. Note the DMC moved back to Fondren basement in January 2015. DMC moved into Herring Hall 129 in March 2005 and stayed there for 10 years before moving back.

DMC Floor Plan

DMC Entrance Door

DMC Service Desk to Lab

DMC Audio Studio

DMC Audio Studio, Inside Look

DMC Classroom

Animate Blood Cells in Blender

Updated 2.8:

 

The video below is the end product of a workshop offered at the DMC “Animate Blood Cells using Blender”. Participants will learn how to model, animate and render simple blood cells. The skills learned in this workshop can be used to create custom visuals to supplement research material.

Eligible participants may register here
The guide may be viewed here

Recording Green Screen Footage in DMC Video/Photography Studio

The students from ELEC 305, an Electronic and Computer Engineering course taught by professor Gary Woods in Spring of 2016, created videos to explain “how something works”. They made full use of DMC resources. They checked out DMC equipment to record their videos and audios, used DMC video editing software to edit their videos. DMC staff presented an in-class training as well as hands-on help in the lab. The staff also helped the professor to judges the videos.

Below video created by the students from this class is a good example of how students used the Chroma Keying effect in a very creative way. The green screen footage was recorded inside the DMC video/photography studio.