View source for Video-Editing-using-Blender/C2/Basic-Video-Editing/English

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|| '''Visual Cue'''
|| '''Narration'''

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|| '''Slide Number 1'''

'''Title Slide '''
|| Welcome to the tutorial on '''Basic Video Editing''' using '''Blender'''.

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|| '''Slide Number 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn the following. 

* Adjust the interface to see the time panel
* Display the waveform for an audio strip
* Zoom in and zoom out on the media strips

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|| '''Slide Number 3'''

'''Learning Objectives'''
||  
* Cut a video strip
* Select multiple strips
* Delete part of a video and audio
* Remove gaps and insert gaps and 
* Trim a video clip 
* We will also learn about few shortcut keys.

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|| '''Slide Number 4'''

'''System and Software Requirement'''
|| To record this tutorial, I am using

* '''Ubuntu Linux''' v18.04 OS and 
* '''Blender''' 2.90.1

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|| '''Slide Number 5'''

'''Pre-requisites'''

'''https://www.spoken-tutorial.org'''
|| To follow this tutorial,
* Learner must be familiar with the '''Blender''' interface.
* For pre-requisite tutorials, please visit this site.

|-
|| '''Slide Number 6'''

'''Code files'''
|| * Files used in this tutorial are provided in the '''Code files''' link. 
* Please download and extract the files.
* Make a copy and use them while practicing.

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|| '''Slide Number 7'''

'''Opening blender'''
||
* '''Linux''' users can open the compiled '''Blender''' file using the  '''terminal'''.
* '''Windows''' users can double click on the '''Blender''' application.

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|| Open '''blender''' interface.
|| I have opened the '''Blender''' interface. 

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|| Click on '''File, Open'''.
|| Click on '''File, Open''' to open the saved '''blender''' project. 

The '''Blender File View''' dialog box opens.

I have saved the '''blender''' project in my '''Videos''' folder.

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|| From the '''Videos''' folder, choose '''first.blend''' file.

Click on '''Open'''.
|| From the '''Videos''' folder, choose '''firstproject.blend''' file and click on the '''Open''' button.

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|| Show opened project.
|| The '''video editing''' interface opens with the media strips in the '''Sequencer''' panel.

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|| Place the cursor between the sequencer scroll bar and the menu below.
|| Place the cursor between the '''sequencer''' scroll bar and the menu below.

The cursor shows a two direction arrow.

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|| Hold and pull it up.
|| Hold and pull it up to show the time panel.

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|| Hover mouse on the three menus.
|| Notice the three menu options on the interface.

They are on the top, in the '''sequencer''' and in the '''time panel'''.

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|| Hover mouse on the three menus.
|| When you practice, watch closely which menu is being used. 

I will not mention them separately.

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|| Resize the time panel and lower it to earlier position.
|| I will revert and resize the panels on the interface. 

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|| Click on the green audio strip.
|| Click on the green audio strip in the sequencer panel to select it.

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|| Click on '''View, Waveform Displaying''' and choose '''Waveform on'''.
|| Click on '''View''' from the options and select '''Waveform Displaying'''. 

From the sub-menu options, choose '''Waveform on'''.

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|| Cursor on the '''waveform'''.
|| The audio wave is displayed on the strip.

This is useful while editing videos since the audio waves are visible.

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|| Place the cursor on the time information line (playhead).
|| Let’s zoom into the video strip.

Place the cursor on the video strip, in the '''sequencer''' panel.

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|| Using mouse scroll zoom in the video.
|| Use mouse scroll wheel to zoom into the video.

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|| Use lower scroll bar to show scroll.
|| Use the scroll bar seen below the panel, to scroll left or right as seen here.

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|| Hover the Cursor at the 34 seconds mark.
|| Notice that there is no audio for about 4 seconds.

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|| Cursor on the empty audio region.
|| Video also has an error in this part and I want to delete this section.

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|| Place the playhead around the 34 seconds mark and left click.
|| Place the playhead or cursor around the 34 seconds mark.

Playhead can be moved using the sequencer header. 

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|| Click on the video strip.
|| First, let’s select more than one strip. 

Click on the video strip to select it.

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|| Hold down the '''shift''' key and click on the audio strip.
|| Hold down the '''shift''' key and click on the audio strip.

Notice the subtle color change in both strips when it is selected.

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|| Press the '''K''' key.
|| Press '''K''' to cut the video and the audio. 

This is called a soft cut.

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|| Cursor on the cut region.
|| Both audio and video clips are cut at this position.

The cut option is called as '''blade''' in blender manual.

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|| Move the playhead by 3-4 seconds.
|| Now move the playhead to about 38 seconds as seen here.

Make sure that both the strips are selected.

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|| Press '''Shift+K'''.
|| Press '''Shift''' and '''K''' keys together to cut the video.

This is called a hard cut.

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|| Cursor next to the cut regions.
|| Now we have 3 video and 3 audio clips.

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|| Hover mouse next to the short video clip between 34-38 seconds.
|| I want to delete the middle sections in the video and audio clip.

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|| Select the cut part of the video and audio to be deleted.
|| Select both the middle cut clips.

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|| Press '''Delete'''.
|| Press '''Delete''' to delete them as seen here.

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|| Cursor on the gap.
|| I will demonstrate the difference between, hard cut, soft cut and '''trim''' options.

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|| Select the video clip on the left side and click on the right end of the clip.
|| Select the video clip on the left side.

Click on the right end of this clip.

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|| Point to the handle on the video in the strip.
|| The short white region is the handle which will allow us to resize of trim.

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|| Left click, Hold and drag it to the right over the gap.
|| Click, hold and drag on the right end of this clip as seen here.

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|| Move the playhead to this region.
|| Move the playhead over this region.

Notice the cut part of the video appearing.

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|| Leave the handle in the initial position.
|| I will revert and leave it in the position as before.

Notice the four direction arrow, while moving the clip.

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|| Choose the right side video clip.
|| Choose the right side video clip.

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|| Click on the left end of the clip. 
Hold and drag to left over the gap.
|| Click on the left end of the clip. 

Hold and drag to the left over the gap.

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|| Show the frame repeat.
|| Now the last frame repeats on the end.

Due to the hard cut, the information on the cut frames is lost.

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|| Leave the handle in the initial position.
|| I will revert and leave it in the position as before.

Next, let’s learn the '''trim''' option.

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|| Select the video clip on the left side and click on the right end of the clip.
|| Select the video clip on the left side.

Click on the right end of this clip.

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|| Hold and drag it to the left a little.
|| Hold and drag it to the left a little.

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|| Move cursor and show the empty video preview.
|| The video in that region gets hidden. It does not get deleted.

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|| Click on the arrow, hold and drag to right to revert.
|| This is the '''trim''' option.

We can recover the video by clicking on the arrow, and dragging it to the right.

I will leave it as it was before.

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|| Cursor on the '''sequencer''' panel.
|| Pause the video and practice the following.

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|| Move the cursor position towards the beginning of the video.
|| Move the playhead position towards the beginning of the video.

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|| Cursor on the beginning of the video.
|| Notice, the first 3 seconds of the video can be trimmed.

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|| Demonstrate to trim the beginning of the video.
|| Practice the trim option here.

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|| Cursor on the gap.
|| We can fill or remove the gap between the clips in different ways.

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|| Select the right video strip, left click and hold.
|| Select the video clip on the right side. 

Select the video clip on the right side.

Left click and hold to see a four direction arrow.

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|| Move towards right till it touches the video strip on the left.
|| Move towards left, till it touches the video strip on the left.

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|| Show overlap the video clips.
|| Let’s move the video clip firther, to overlap on the left side strip.

Try to overlap the right video on the left video.

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|| Show the jump of the right clip from overlap.
|| The program automatically pushes the clip to the right of the left clip.

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|| Show gap in audio strip.

Press '''Control Z'''.
|| The gap between the audio clip is unchanged.

Hence, press '''Control Z''' to revert or undo the change to remove the gap.

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|| Place the playhead on the gap.
|| Place the playhead on the gap.

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|| Right click to open context menu. Click on '''Remove gaps'''.
|| Right click to open the context menu.

Click on the remove gaps option. 

Notice the gaps removed in audio and video.

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|| 
|| Pause the video and practice the following.

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|| Place the playhead on the left side clip.

Right click to open the context menu. Choose insert gaps.
|| Place the playhead on the clip on the left side.

Practice to insert gaps and also remove the gaps.

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|| '''Slide Number 8'''
'''Shortcut keys'''

Soft knife tool K 
Hard cut Shift+K
Remove gaps Backspace
Play video Spacebar 
Grab handle G
Mute audio or video H
Unmute Alt+H
|| Knowledge of shortcut keys are useful and essential for video editing.

Few shortcuts are shown here. 

Please study them.

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|| Press '''Control+S'''.
|| Press '''Control S''' to save the project.

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|| Click on '''FIle, Quit'''.
|| Click on '''FIle, Quit''' to quit '''Blender'''.

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|| '''Slide Number 7'''
'''Summary'''
|| Now let's summarize. In this tutorial, we,

* Learned about the time panel.
* Displayed the waveform of an audio strip
* Cut a region in a video file
* Removed the gap between video clips
* Trimmed the video
* Learned few shortcut keys

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|| '''Slide Number 8'''
'''Assignment'''
|| For assignment activity, please do the following.

Using the '''edit.webm''' video file provided in the '''code files''' link, 
* Trim the video for 5 seconds from the end
* Cut the region between 20-25 seconds in the video and 
* Save the project

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|| '''Slide Number 9'''
'''Assignment'''
https://commons.wikimedia.org/wiki/File:Annual_Sea_Ice_Minimum_1979-2013_with_Area_Graph.ogv

|| 
* The file provided for assignment is downloaded from the site shown here.
* You may also use a video of your choice.

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|| '''Slide Number 10'''
'''Spoken Tutorial Project'''
|| This video summarises the '''Spoken Tutorial''' Project.
Please download and watch it.

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|| '''Slide Number 11'''
'''Spoken Tutorial workshops'''
|| We

* conduct workshops and 
* give certificates.

Please write to us.

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|| '''Slide Number 12'''
'''Forum for specific questions:'''
|| Please post your timed queries in this forum.

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|| '''Slide Number 13'''
'''Acknowledgement'''
|| '''Spoken Tutorial''' Project is funded by '''MHRD, Government of India'''.

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|| 
|| This is Rani from '''IIT Bombay'''. Thank you for joining.

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