Needed to work with M4V - no audio

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Alex Beloff

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Needed to work with M4V - no audio

PostWed Feb 20, 2019 9:23 pm

I imported couple of M4v files into project and started playing them. And … no audio! Is M4V an unsupported format?

I had to use competitor's suite to convert them first!

Am I missing something here?
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Jim Simon

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 9:34 pm

M4V is the video only version of MP4.

M4A is the audio only version of MP4.
My Biases:

You NEED training.
You NEED a desktop.
You NEED a calibrated (non-computer) display.
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Alex Beloff

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:01 pm

No, it's not. I open it in Windows Media Player (or any other player) and I hear the sound!

Image
Last edited by Alex Beloff on Wed Feb 20, 2019 10:11 pm, edited 1 time in total.
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Andrew Kolakowski

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:06 pm

It had has extension then. Rename to .mp4.
Post screen grab from mediainfo.
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Alex Beloff

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:28 pm

ok, after renaming I imported the files into Resolve and I still don't have audio! :(
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Andrew Kolakowski

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:33 pm

Post screen grab from mediainfo (with View set to Text mode).
Looks like this:

Image
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Alex Beloff

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:38 pm

What are you using for this?
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Alex Beloff

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:41 pm

oh, got it. just a sec
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Alex Beloff

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:46 pm

here we go:

Image
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Andrew Kolakowski

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 10:55 pm

File has HE-AAC v2 audio track.
Maybe Resolve doesn't support HE-AAC, just AAC audio.
Your file is from mobile etc. with variable fps. Bad recording for use in Resolve.

You may want to put it through ffmpeg:

ffmpeg -i source.m4v -r 30 -c:v copy -c:a pcm_s16le out.mov
It's very fast conversion changing audio to PCM and copying video untouched.
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Alex Beloff

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Re: Needed to work with M4V - no audio

PostWed Feb 20, 2019 11:06 pm

Thank you! Now there's an audio!

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