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balmainboy
balmainboy
Participant
September 10, 2015
Answered

Copy closed captions from a .wav to .mp3?

  • September 10, 2015
  • 2 replies
  • 409 views

Hi,


I've been working on a presentation in Captivate 8 and have just finished creating all my closed captions.


I've been working with the .wav files from my audio as i was told these were the higher quality. As it comes towards time to publish the presentation i've been asked to use the .mp3 instead of the .wav files. Which is fine as the audio is the same, however there doesn't seem to be any way possible to copy the content of the captions and copy it into a separate file. The captions seem to be exclusively linked to the file it was created in.


I tried exporting the audio but that loses the captions in both file formats. When exporting the closed captions it puts them into a word doc, but i don't see how i can copy it from that word doc onto a new audio file (the .mp3).

Is there a way to do this, or am I going to have to copy and paste, and manage the timelines sequences for my entire presentation again? I've searched online but couldn't find anything similar to this exact situation.

Thanks in advance.

BB



This topic has been closed for replies.
Correct answer Lilybiri

No, you can choose audio settings. The published file will have mp3, not wav. Reduction of file size will not be great at all if you start with mp3, because second compression will not lead to much saving on file size, but will definitely  lead to quality loss. As I told all assets are compressed to keep file size low. Audio settings: choose mono, keep bitrate low etc are much more important than replacing the wav files in the Library by mp3.  I didn't check it in CP9, but if you import mp3 Captivate used to create a wav file from that mp3 in the Library which is reversing the situation in a wrong way.

Keep also the number of frames as low as possible and choose an appropriate resolution for the CP-project to influence the file size.

2 replies

balmainboy
balmainboyAuthor
Participant
September 17, 2015

Thanks for the advice Lilybiri and Rod.

I'm leaving the files in .wav form. Apologies for not replying again until now.

Lilybiri
Lilybiri
Legend
September 10, 2015

Whoever told you that is not a CP expert. CP is compressing everything when

publishing. For audio that means it creates a mp3 from your wav files.

balmainboy
balmainboyAuthor
Participant
September 10, 2015

Hi Lilybiri,

I was advised to use mp3 as the files were 1/5 the size of wav files. If doing this could then reduce the size of the final presentation from 150MB down to something closer to 50MB that would be preferable.

Are you saying that when I publish to html5 Captivate will automatically use mp3, or give me the option of choosing either the wav or mp3 version of the audio? And will assign the closed captions to whichever I choose?

I would have thought that if I only have wav in the library it publishes wav, and likewise if i only had mp3s in my library it publishes to mp3 and the final size would be largely dependant on the audio format chosen as well as the size of the images used etc?

Lilybiri
LilybiriCorrect answer
Legend
September 10, 2015

No, you can choose audio settings. The published file will have mp3, not wav. Reduction of file size will not be great at all if you start with mp3, because second compression will not lead to much saving on file size, but will definitely  lead to quality loss. As I told all assets are compressed to keep file size low. Audio settings: choose mono, keep bitrate low etc are much more important than replacing the wav files in the Library by mp3.  I didn't check it in CP9, but if you import mp3 Captivate used to create a wav file from that mp3 in the Library which is reversing the situation in a wrong way.

Keep also the number of frames as low as possible and choose an appropriate resolution for the CP-project to influence the file size.

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