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Synchronizing and Adjusting Captions/Subtitles

Time Code Overview

CaptionMaker 6.3 User’s Guide

Best Practices for ATS

The following are important points to consider for getting the best results from an

Automatic Time Stamp operation:

•

An accurate transcript is vital. To get good results, the transcript cannot deviate sig-

nificantly from the audio.

•

High quality audio is also the key. Compression, sound effects, or music can distort

the dialog.

•

Speaker IDs that are indicated with “>> Name:” are treated as unspoken text.

•

Non-verbal information in the transcript, such as music or sound effect indications,

should be enclosed by brackets such as this: [MUSIC], or [Applause].

•

If the software highlights some caption lines as low confidence, you might want to

do a quick Preview Play to spot check these sections. In many cases the low confi-

dence sections may be fine or close enough for your needs. If not, you can do a

manual time stamp just on these few sections to improve the alignment.

Automatic Time Stamp Operation

After the text is imported and broken into the sections you want, you are ready for

Automatic Time Stamp.

To perform the Automatic Time Stamp operation:

1. In the Time Code menu select ATS Automatic Time Stamp. The Auto Time Stamp

dialog opens and indicates the progress, confidence percentage, and time

remaining.

2. The ATS dialog closes automatically when the operation is complete.

Selecting a Range for Auto Time Stamp

You can also run ATS on a range of captions if there is a small portion that could use

additional adjusting. See Selecting Multiple Rows for techniques to select a range of

captions.

ATS Error When File Name Contains Special Characters

If you use a video file that has a # (hash, pound) or some other special characters in the

file name, you may get an error message when trying to use Auto Time Stamp (ATS).

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Synchronizing and Adjusting Captions/Subtitles

Time Code Overview

CaptionMaker 6.3 User’s Guide

If this error occurs, copy the video file to a local hard drive (not a network drive) and

rename the video file so there are no special characters. That should allow ATS to read

the video file.

Checking the Timing

After running ATS, or after manual time stamping, you are ready to check the timing of

the captions by using Preview Play. At the same time you can check the location of the

captions to see if position adjustments are needed. Each caption should start when the

first word of the caption is spoken.

Preview Play

To preview the caption and video synchronization:

1. Rewind the video all of the way to the beginning by dragging the slider, that’s just

below the video, all of the way to the left.

2. Press the Preview Play button

. This engages the Auto Row button

which

makes the captions change with the video, following the Start and Stop times that

are set.

3. To stop the video, press the Play/Pause button

4. You can now use the Play/Pause button

to start and stop the video and the

captions will stay synchronized since the Auto Row button is engaged.

Caption and Video Playback Controls

Rewind.

Press to put the video into rewind mode.

Step Back.

Press to go back one frame. Hold Shift and press to go back about 1/3

of a second. Hold Control and press to go back about 1 second.

Play/Pause.

Press to play and pause the video.

Step Forward.

Press to go forward one frame. Hold Shift and press to go forward

about 1/3 of a second. Hold Control and press to go forward about 1 second.

Fast Forward.

Press to put the video into fast forward mode.

Pointer and handle to time location

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Synchronizing and Adjusting Captions/Subtitles

Time Code Overview

CaptionMaker 6.3 User’s Guide

Preview Play.

Press to start playback and engage the Auto Row button

. This

makes the captions change along with the video, following the Start and Stop times

that are set.

Time Stamp.

This button starts video playback, but the captions do not play

along. Use this mode when you want to edit the In points (start times) of the captions

and you don’t want the captions to advance.

Auto Row (Captions Follow Video).

When this is pressed (toggled on), the

captions change along with the video, following the Start and Stop times that are set.

Auto Shuttle (Video Follows Captions).

When this is pressed (toggled on), and

you select a caption row, the video automatically jumps to the time of that caption.

You can also quickly move through the caption rows using the up and down arrow

keys, and the video follows along.

Advanced Playback Control

Users can control the video playback speed using the VTR controls toolbar to speed up

or slow down the video. See VTR Toolbar for more information.

You can also use the J-K-L keyboard controls to shuttle the video, the same way that

popular video editing applications operate. To enable the J-K-L option, from the VTR

Control menu choose Enable “JKL” Control.

To use the J-K-L keyboard control, press J to rewind, K to stop, and L to play forward.

Multiple presses of the J or L keys increases the speed of rewind or forward. When your

cursor is in a text edit field the J-K-L keys will enter letters. Click in the Video Preview

Panel to switch back to the J-K-L keys controlling video playback.

You can configure the speed increments that are used for multiple presses of the J or L

keys. To do so, go to VTR Control > Configure “JKL” Control. The “JKL” Play & Shuttle

Control Settings dialog opens.

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Synchronizing and Adjusting Captions/Subtitles

Time Code Controls

CaptionMaker 6.3 User’s Guide

Time Code Controls

Time Display.

Displays the current time of the video in HH:MM:SS:FF

format. (H = hours; M = minutes; S = seconds; F = frames.)

Start Time Code Reader.

When selected, timing information is displayed from

the time code reader, video playback, or the PC System Timer.

Send Caption/Subtitle (Keypad Plus (+)).

Click to set the In Point or Start Time

of the first word of the currently selected caption. If multiple rows are selected, start

time is set for the first, or top row. For hardware devices, this sends the selected

caption/subtitle to the device. The Plus key (+) on an extended keyboard or keypad is

the shortcut.

Send Caption/Subtitle Erase (Keypad Minus (-)).

Click to set the Out Point or

End Time of the last word of the currently selected caption. This only needs to be set

when a space is needed between captions, such as when there is a pause in the speech,

or when the captions have ended. For hardware devices, this sends a command to

erase the selected caption/subtitle from the device at that time code point. The Minus

key (-) on an extended keyboard or keypad is the shortcut.

Note: When you set an Out Point or End Time, you must set an In Point or Start Time

at the point you want the next caption to appear in the video. When a space is not

needed between captions, you only need to set the In Point or Start Time for each

caption.

Mark Time Code on Send Lines.

This associates the clock time to the In Point and

Out Point (Send) buttons. This must be selected for time codes to be written to captions

when time stamping with the In Point or Out Point buttons, or other time stamp

method. De-select this when you do not want to preserve time codes, such as when

sending to certain hardware devices.

Time Code Properties.

Opens the Time Code Reader Properties dialog. See Time

Code Reader Properties for information on the dialog options.

Seek Previous and Next Shot Change.

These buttons become active after

the shot change information has been detected for a file. To run the shot change

detection operation, select Tools > Find Shot Changes. A status bar in the bottom of the

CaptionMaker window indicates the progress:

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Synchronizing and Adjusting Captions/Subtitles

Time Code Controls

CaptionMaker 6.3 User’s Guide

The Previous and Next Shot Change buttons are now active. The display text is red

when less than 10 seconds from the next shot change, as shown in the following:

See Find Shot Changes for more information on using the shot change finding options.

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Synchronizing and Adjusting Captions/Subtitles

Manual Time Stamping

CaptionMaker 6.3 User’s Guide

Manual Time Stamping

Manual time stamping allows you to associate a timecode to each block of text so it will

be in sync with the dialog. Manual time stamping is needed for various situations, such

as videos that are not in English or that have loud music. To perform manual time

stamping:

1. Rewind the video all of the way to the beginning by dragging the slider, that’s just

below the video, all of the way to the left.

2. Click the Time Stamp button

. Playback starts, but the captions do not play

along.

3. Click the Send Caption, or In Point button

each time you hear the first word of

a caption. Or you can press the + key on your extended keyboard number pad.

4. Every time you press the + key, or the In Point button, time code appears in Start for

that row and the next row is automatically selected. Continue until you have set the

start time for each row of captions.

5. To stop video playback, press the Play/Pause button

Note: If you don’t have an extended keyboard, such as on a typical laptop, you can

change the default + key shortcut for Send Caption Line(s). See Customize Keystrokes

for information on changing the default keyboard shortcuts.

Creating a Pause in Caption Display

Typically, closed captions are back-to-back to allow the reader enough time to read the

text on the screen. But if there is a significant pause in the dialog, or credits and other

information is displayed, there should be a pause in caption display.

To create a pause, you can press the Out Point/End Time button

during a manual

time stamping process.

After setting an Out Point/End Time, you must press the In Point/Start Time button

when you want the next caption to appear in the video.

Check Your Timing

After you have performed a manual time stamping you should check the timing by

using the Preview Play button

. For more information see Preview Play.

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Synchronizing and Adjusting Captions/Subtitles

Adjusting the Timing

CaptionMaker 6.3 User’s Guide

Adjusting the Timing

Several timing adjustment options are available when you need to synchronize

captions to a video, correct for changes over time, or create different versions for

various delivery requirements.

Adjusting Specific Caption Timing

During playback you may have discovered some captions that need to have their

timing adjusted. The following describes some methods for adjusting specific captions:

•

New In Points. Click on the row where you want to make the change, then move

back a couple of captions before that. Click the Time Stamp button

, and press

the In Point button

when at the point you want to synchronize the caption to

the dialog. Continue for any captions you want to fix.

•

New Out Point. When you want to create a space before the next caption displays,

press the Out Point button

. Then you will need to set a new In Point when you

want the next caption to display.

•

Manual Time Entry. You may also enter new times manually by typing into the

Start or Stop columns. The time just before or after it is automatically adjusted.

•

Right-Click Menu. Right-click in the Start or Stop column to open a menu. You can

select Mark “In” Time Code or select Mark “Out” Time Code.

Clock Time vs. Time Code

The numbers for the clock time and the time code of a caption can sometimes be

different. The following provides a brief explanation of how these time measurements

relate to each other.

Clock Time

Clock Time is also referred to as Media Time or Real-World Time. This is the time that an

event occurs relative to the start of the video. Imagine you start a stopwatch at the

same time the video starts. At the time a caption is supposed to appear, the time shown

on the stopwatch is the clock time (or media time) of the caption. The clock time of a

caption is independent of the video frame rate. For example, if a section of dialogue

occurs exactly 60 seconds after the start of the show, it will always occur at 60 seconds

regardless of whether the video frames update at 10 frames per second, 25 fps, 100 fps,

or any other frame rate.

The only case where a clock time of a caption might change is if the video speed is

changed. This sometimes happens when converting film sourced material to TV

formats—the video is slightly slowed down or sped up, and now the video version has

a different duration than the original film (without any other edits to the content). This

results in the dialogue and its associated caption clock time occurring slightly earlier or

later than before.

Synchronizing and Adjusting Captions/Subtitles

Adjusting the Timing

CaptionMaker 6.3 User’s Guide

Time Code

Also called SMPTE time code. Time Code is a system used to uniquely label each video

frame with a time-based identifier in HH:MM:SS:FF format. Time code is the value

displayed in the Time Code section on the CaptionMaker interface. Due to some

peculiarities of different video systems, you cannot always take a time code at its face

value—the numbers shown in the time code are not always equivalent to the number

of hours, minutes, and seconds that it actually represents. Thus it is important to keep

in mind that the time code of a caption will sometimes appear to be a different number

than the clock time of a caption, even though both they both reference the exact same

moment in time.

Further complicating things is that time codes come in different modes, and so a given

clock time can be represented by different time codes depending on which time code

mode you are using. The Convert Time Code dialog allows you to switch modes

depending on your needs.

For more information on time codes, see the Telestream knowledge-base article: Time

code for 23.976 / (23.98) frames per second video.

Applying Ripple Time Code Offsets

Ripple Time Code changes the time code within a currently selected range, or from a

selected row to the end of the file. Use this when you want to change the time stamp of

all the selected rows by a few frames, or if you want set a new start time for the selected

range.

To make a Ripple Time Code adjustment:

1. Use one of these selection methods—

a. Select a range of rows that you want to adjust.

b. To adjust all the way to the end, select the row where you want to start

performing the Ripple Time Code offset.

c. If you want to create offsets for the entire file, select the Start column header to

highlight all the Start time cues.

2. Right-click on the time code cell of the very first selected row and choose Ripple...

from the menu.

Synchronizing and Adjusting Captions/Subtitles

Adjusting the Timing

CaptionMaker 6.3 User’s Guide

3. The Ripple Time Code dialog opens, and displays the starting and ending row that

the operation will be performed on.

4. Enter the adjustments you want to make into the fields provided.

Stretch/Shrink Time Code

If your caption timing is right on time at the start but is off a few seconds from the video

at the end, you have “captioning drift”. This can be corrected by using the Stretch/

Shrink Time Code option. Choose Time Code > Stretch/Shrink Time Code.

The time code value is in the HH:MM:SS:FF format.

Use the “Increase time code by 1.001/1.000” option when you want to convert 23.976

fps to 24 fps, 29.97 fps to 30 fps, or 59.94 fps to 60 fps. This difference is 3 seconds per

hour of video.

Use the “Decrease time code by 1.000/1.001” option when you want to convert 24 fps

to 23.976 fps, 30 fps to 29.97 fps, or 60 fps to 59.94 fps. This difference is 3 seconds per

hour of video.

This option is also useful when you use a “proxy movie” to do all the captioning and

then need to match the time coded file with the master copy of the video, which may

have a slightly different code by the end of the video. One reason this could happen is

due to a drop frame/non-drop frame issue. To match the time code of the caption file

with the video, make sure the first time code of the caption file matches with the

master copy. Then choose this option and enter the last time code from the master

Synchronizing and Adjusting Captions/Subtitles

Adjusting the Timing

CaptionMaker 6.3 User’s Guide

copy. This will stretch or shrink all the time codes in the caption file to match the master

copy.

You can also use the Convert Time Code dialog to match the time code of the master

copy of the video.

Convert Time Code

The Convert Time Code dialog provides several options so you can adjust the time code

to match other versions or delivery destinations of the movie, or you can change the

timing when captions do not sync up with the video. To open the dialog, go to Time

Code > Convert Time Code.

Maintain Clock Times

Use Maintain Clock Times if the captions are currently in sync with your movie (the

clock times are correct), and you want them to stay in sync, but at a different frame rate

or time code mode. For example, this option is used when your captions sync up with a

29.97 fps movie and now you want to apply them to a 23.976 fps version of the same

movie, which has the same duration as the original, so that you can deliver a 23.976 fps

caption file. When the time code or frame rate changes, the clock times that they

represent will be unchanged.

Modify Clock Times

Use Modify Clock Times if the captions currently do not sync with the movie (the clock

times are not correct) and you want to bring them into sync. Or, if the captions sync

with this movie but you need to make them sync with another version of the movie

which plays faster or slower. For example, this mode is used if you imported a Non-Drop

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