Tough audio encoding help

[jinkazuya]

Well...I have an anime with Japanese as the original audio with no subtitles. However, recently I have been learning how to use Megui as well as a way to cut, paste and edit the audio extracted from some other sources that I have found.

However, I have found two audios I would like to integrate into the Japanese anime. These two audios are English and Chinese. Unfortunately The Chinese audio does not have opening and ending soundtrack and the English one, when compared with the original Japanese audio, is 1 minutes shorter.

Now the only way I know of to deal with this in this case, is to cut a portion(that's the opening soundtrack) of the Japanese audio and join it with the Chinese one and then extract the ending soundtrack and do the same thing. But I cannot determine the frame rate or bitrate like when to cut and join so the audio and video are always out of sync. And besides that, after joining, the volume of the audio within the movie, sometimes become really loud but after a while it just quiets down.

As for the English audio, I don't even know what I am supposed to do with it.

So the question is like if there is a way or tutorial that could show me how to sync the audio with the video and then normalize the audio so that it won't sometimes become really loud and sometimes really quiet.

[Ghitulescu]

Try using a "real" audio processing software, like Audacity (free), instead of video processing tools with audio capabilities. After your work with audio is done, you can use the latter to "fit" the audios in video.

[Gser]

Try using a "real" audio processing software, like Audacity (free), instead of video processing tools with audio capabilities. After your work with audio is done, you can use the latter to "fit" the audios in video.

And normalize the volume too.

[jinkazuya]

Well...How do you know the exact frame or bitrate to be cut and pasted because there is no picture for you to see. I use Audacity, which is a powerful tool.

But you know the soundtrack of the English does not have the opening theme and ending theme but the Japanese soundtrack has them both.

[Ghitulescu]

Cutting is a simple operation and can be done without [significant] quality loss in almost any software (including video editors). Pitch changing, normalization, duration change and so on, as I said, better in audacity, you said you use it ;). Putting together in one place -> videoeditor.

[jinkazuya]

I think you get me wrong Ghitulescu...

My question is how you could figure out when to cut the audio you want that matches the original soundtrack of the video because the English audio that I want to integrate into my Japanese anime does not have the opening theme.

The English audio is extracted from the different video of the same anime but it just doesn't have the opening theme. Besides, I would like every bit of bitrate or length of time of the english audio to match the Japanese one and enable them to be in sync.

In addition, because of the English audio has been cut off of the opening theme, the time duration is different, how do you determine where the exact time of the audio to be cut without seeing the video?

assuming(just a made-up time) the length of time of the English audio was 20 minutes without the opening and the ending theme. Then the Japanese audio with OP and ED was about 23.5 minutes. How do figure out the exact time of the opening theme of the Japanese audio to be cut? If, in assumption again, the correct time of the OP was 1.5 minutes, without seeing the video and just by listening, and one thought oh the length of the opening theme was 1.5, and he cut it off, then that will be inaccurate and might lead to one audio is longer than another, and surely if integrating that audio within the video, the audio and video will be out of sync.

[kypec]

Without being able to preview VIDEO along with your AUDIO it's really tough task. Try to find some distinctive sounds which can be "paired" easily, like door slam, gun shot, short scream or anything like that. Once you locate such effect in both your AUDIO tracks, you're (almost) done.

[jinkazuya]

Is it the way how you guys encode the audio without having to see the preview of the video? Because most of the Chinese guys who edit the audio or do the same thing as what I am asking for help do not really have to preview the video. Some of them who speak English said that they could determine the bitrate or frame or timing by just looking at the wave form and do the comparison. How the heck can they do that?

Well...Those it is possible to find the distinctive sound like what you said Kypec, it is still really hard to locate the timing or the accuracy of the audio because the audio is just simply running too fast in the wave form...My question again is if it is not always possible to locate the the exact accuracy of the audio 100%?

[kypec]

How the heck can they do that?I've no idea, ask those chinese guys then.:p
because the audio is just simply running too fast in the wave form...Audacity has a playback speed slider -> try to play at much lower speed than realtime, it helped me a lot in the past.

[jinkazuya]

Hi kypec...Thanks for your constant response. I think you might be sophisticated in audio encoding...Would you please tell me something about your experience when it just comes to this situation where you have no way to preview the video to edit your audio? This is really tough. I took your advice and found some instinctive sound or background sound, then I spent more than 2 or 3 hours doing the work. Finally I managed to get it done but the audio was still out of sync with the video. And the length of time of the audio is 1 sec longer than that of the original sound or movie.