Youtube 1080p MP4 vids without sound after downloading

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Youtube 1080p MP4 vids without sound after downloading

Post by Karolinger on Fri Feb 07, 2014 6:31 am

It seems that Google did something to films with this quality. I downloaded all MP4 qualities of the same video (with FlashGot's media feature) and all files had sound, except 1080p.

Just FYI, DownloadHelper.net don't show the 1080p option anymore, even if you can select this quality from the official YT player. I think this might be related with this "issue"... maybe not...?

In summary, YT must had changed something with 1080p movies. No sound after downloading them, but they sound well streaming directly from the site.

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Re: Youtube 1080p MP4 vids without sound after downloading

Post by Admin on Fri Feb 07, 2014 7:51 am

If something has changed, then I am sure DownloadHelper will be updated soon.

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Re: Youtube 1080p MP4 vids without sound after downloading

Post by Karolinger on Fri Feb 07, 2014 9:10 am

Wait...

My post's main subject is the muted 1080p MP4 files that come without sound when you download them from YT. The downloadHelper mention is just commentary.

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Re: Youtube 1080p MP4 vids without sound after downloading

Post by Admin on Fri Feb 07, 2014 10:01 am

I have done some research.

YouTube does not use standard MP4 files for their 1080p video. They use the DASH format.
http://en.wikipedia.org/wiki/Dynamic_Adaptive_Streaming_over_HTTP

From what I have read the audio and video are also stored in separate files. So that is why your downloaded files only showed video.

This Firefox extension has the ability to download both files and remux them into a new file.
https://addons.mozilla.org/en-US/firefox/addon/youtube-video-and-audio-dow/

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Re: Youtube 1080p MP4 vids without sound after downloading

Post by Karolinger on Sun Feb 09, 2014 4:13 am

Thanks!

You are correct, sir.

The YT Fx ext you mentioned works well.

Thanks again!

Admin wrote:I have done some research.

YouTube does not use standard MP4 files for their 1080p video. They use the DASH format.
http://en.wikipedia.org/wiki/Dynamic_Adaptive_Streaming_over_HTTP

From what I have read the audio and video are also stored in separate files. So that is why your downloaded files only showed video.

This Firefox extension has the ability to download both files and remux them into a new file.
https://addons.mozilla.org/en-US/firefox/addon/youtube-video-and-audio-dow/

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Re: Youtube 1080p MP4 vids without sound after downloading

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