A few years ago, I made a post about an extension for Chrome called the NicoNico Audio Extractor. At the time, NicoSound had just gone out of service. NicoSound (similarly, NicoMimi) was a site where you could directly download the audio from any video on NicoNicoDouga. That site had to be taken down due to serious copyright claims. No similar sites have appeared since then to take its place. However, the Audio Extractor extension made it simple to download songs with the click of a button.
Unfortunately… It seems to have stopped working. I’ve heard of people having issues with it in the past, all of which seemed fixable. This time, I’m not sure it can be fixed.
When I attempt to download a song, the error message I receive now is this:
“Error: Cannot read property ‘bytes’ of undefined”
Apparently this is a regular/common github application error message. I had gotten it before on a few videos in the past. Very few. Suddenly, every new video posted from June 28th and onward has been yielding this error for me. I don’t have trouble with any videos that were posted before that date which leads me to believe that this error is a result of a change made to the NicoNicoDouga site itself and the way new videos are uploaded and/or implemented.
If anyone knows of a way to fix this, please let me know. Leave a comment. I feel like I’ve tried everything no matter how ridiculous. I’m not knowledgeable when it comes to coding at all, however, so I haven’t tried anything “direct” with the extension itself.
In the meantime, if you’re also experiencing this error, I’m not sure what I can suggest. I’m also at a loss right now.
I found an extension called Chrome Audio Capture which will capture the audio from one of your tabs, but you’ll have to listen to the whole song without pausing. The quality will be iffy because it will also capture any hiccups that occur due to loading, freezing, etc. Overall, I wouldn’t recommend it for extended use, but it has its uses nonetheless.
If you happen to know of any sites that can quickly and reliably rip audio from ANY site (including NND, obviously), lemme know!
EDIT: You know what? That method I listed above using the Chrome Audio Capture is basically garbage. While, yes, it will capture the audio for you, I found the resulting audio files to be so riddled with glitches, I needed to find another alternative.
I went back to the basics. This method is easy. It takes more time, but I think the time is worth the better result.
To begin, what you’ll need is Firefox and the Niconico Downloader add-on. All you do is go to the NND video you want to download and click on the green puzzle icon that appears in the URL bar. That will download the whole video.
Once you have the video, you can convert it using your method of choice. Personally, I like using the RealPlayer Converter because it will convert just about any video file type to MP3. It isn’t going to provide you with the BEST audio quality, but it also won’t be the stuttering, garbled garbage I got using the Chrome audio capture extension.
So there you go. Hope that one helps anyone else.
EDIT #2: An update for you… As of July 27th, the niconico audio extractor mysteriously seems to be working for me again. I have no idea why. If anyone can even attempt to explain this phenomenon, that’d be great. Regardless, I hope that the alternatives I described above are helpful for anyone else who runs into unexpected difficulties with the extractor.
EDIT #3: It’s September 24th now. It stopped working for a while, but now it’s back! …With an update, it seems! I was confused at first because they removed the pop-up window. Now, when a video is downloading, there’s a small notification in the lower right of the webpage. Just make sure you don’t close your tab and you should be good to go! (I still get an error here and there, but I’ll accept that.)