Automatic Video Authoring with Media Analysis

2003/11/25

Chen-hsiu HuangAdvisor: Dr. Ja-Ling Wu

Outline Problem formulation Solutions and framework Expectations Status report Demonstration Questions and discuss

Problem Formulation The digital video capture devices such as DVs are made m

ore affordable for end users. It’s interesting to shoot videos but frustrating for editing the

m. There’s still a tremendous barrier between amateurs (home

users) and the powerful video editing software. Finally people leave their precious shots in piles of DV tape

s without editing and management. Type I home video: memorial Type II home video: recreational

According to a survey on DVworld*, the relations between the video length and how many times will user review them after days:

People are inpatient for videos without scenario or voice-over, especially for those with no music.

Video clips with no more then 5 minutes are best for human’s concentration.

Video length Review times

>= 1 hr 1 or 0

30 min ~ 1 hr 2 ~ 3

15 ~ 30 min 5 ~ 10

5 ~ 15 min >= 10

<= 5 min You take it out and watch it when you think about!

*http://www.DVworld.com.tw/

Solutions and Framework A consumer product called “muvee autoProducer” has bee

n announced to ease the burden of professional video editing.

The application scenario is quite simple: Pickup a video Choose your music Produce musical video!

Although there are commercial products in the market, only few academic publications related.

Goal: To achieve the near or beyond quality in the similar application scenario with the content-analysis technologies developed in multimedia domain.

Jump!

Input video

Input music

Shot changeScene change

Audio segment

cutting

Alignment

Output Video

VolumeZCR

BrightnessBandwidth

…

Human faceFlash light

Motion strengthColor variance

Edgeness...

Scene selectionKey shot selection

Audio rhythm &Video motion/color

synchronization

Framework of AVAMA system

Currently finished

Expectations Quality results Time & space complexity consideration

Must not take too longer to make a video Must not consume too much memory

Complete consumer software implementation Deal with MPEG-1/2 videos and MPEG-1 Layer 1/2/3 audios

directly without pre-processing Simple application scenario to produce videos

The need of different profile? Is semi-automatic necessary?

Status Report Audio Cutting:

Cutting with zero-crossing rate (not so good) Cutting with dramatic volume change (great results) Brightness, bandwidth, ...

Video Segmentation: Shot change detection by pixel MAD Detect scenes with flash light event Detect fast motion scenes

Longer fast motion scenes means author’s tracing some objects Short fast motion scenes may due to

Detect human face information (time complexity?)

Demonstration

Questions and Discuss Any comments are welcomed. Special thanks for Mr. 劉嘉倫 , for his videos and suggesti

ons. Thanks friends in DVworld who provide lots of ideas and co

mments.

Create Music Videos using Automatic Media Analysis, ACM Multimedia, 2002

Let’s see its demo!

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