m4v won't play after Sierra update

I have a similar issue as well. Some of my m4v files show up as a white page with a folded corner icon. They won't play in anything but VLC player. When I try to play them in iTunes the time doesn't move and it says LIVE. When I move the files to an older OS (El Capitan) they play and look correct.

Same problem here. Here is what I have found so far.

m4v files are now capable of storing the original DTS soundtrack. So if the encoded m4v file contains only AAC and AC3 soundtrack, the file is recognised by iTunes and QT and will play file. However, if you are an enthusiast and retain the original DTS soundtrack along with AAC and AC3 in your m4v file, it will behave as indicated by Sastei and shall not be recognised. Why retain the original DTS soundtrack - future proofing since DTS is encoded to a higher bit rate and my encoding SW only allows upto 640 kbps on AAC and AC3 soundtracks (ST).

Now, before Sierra, other OsX had no issues with m4v files containing original DTS ST, but Sierra has an issue. I raised this as a problem while I was running beta versions of Sierra, but Apple has not gotten to it yet and I don't know if they will.

You may try to see if the m4v files you have that are not recognised by iTunes / QT have a similar DTS ST problem. If yes, you may re-encode these files by removing DTS ST using Subler. Not ideal solution, but works for now.

In my case, I would rather wait on Apple to fix it than lose my DTS STs.

Hi,

same issue here. Not with DTS tracks, but mp3 tracks. All files played on previous OS without any problems.

Hi,

sadly i have the same issues :/

Greetings.

What behaviour are you seeing with MP3 files?

Normal mp3-musik files are working properly.

But i don't have a m4v file with a mp3 track to test. Do you habe such a file? I would like to test it.

Greetings.

Sorry, do not have a m4v with MP3 track. Let me spend some time on it in next 24 hrs and see if I can create such a file. No promises though. 🙂

Hi,

the same issues as you mentioned with DTS tracks. Once there is a MP3-track included iTunes and Quicktime don't play them since Sierra, while VLC plays them without any problems. It's no big deal for me, I just convert the tracks I need in another format, I just wanted to let you know that there are also issues with other sound formats than DTS 🙂

So i have found a way to create such a file. (I used Handbrake)

Yes for me those files don't play either.

For me its a big deal that those files aren't playing. I have more nearly 400 Movies with a DTS track inside :/

I am having the same issue - I wonder if they will fix the DTS issue?

Same problem. Many of my movies now have a blank white page/folded corner icon and won't play in in iTunes/appleTV.

I have been having the same issues since Sierra as well 😟 sooooooo many movies with DTS. I hope Apple is working on a solution or at least acknowledge that this issue exists and what their intentions are.

All is well with the world now. 🙂

After Sierra 10.12.2 update that I installed today, I played a few m4v files with DTS track embedded and they are now playing fine in iTunes.

Apple TV 4 was also updated with TVOS 10.1 and is now playing these files fine as well.

Cheers!