Qlab video sound issues

[RJ La Mura]

Hi,

I am production managing a dance show which has artists providing video. I was hoping to use Qlab3 to run audio and video tracks for the production. I have very limited experience with Qlab, and even less with how Macs work, basically having only turned them on to run Qlab. I was given a .MOV file from the artist, and when I dragged it into Qlab it was unrecognized. 

I have been trying to use VLC to convert the video file into something recognized by Qlab. In VLC you can select encapsulation, video type, and audio type. I have been kind of successful converting to H.264 + MP3, which comes with an encapsulation of .m4v, but it drops the audio when played back in Qlab and Quicktime.

When grabbing video information on the original file the specs are as follows:

Apple Intermediate Codec, 1,920 x 1,080

Linear PCM, 16 bit little-endian signed integer, 2 channels, 48000 Hz

After the conversion to .m4v the file specs read in quicktime are:

H.264, 1,920 x 1,080

Audio doesn't work using quicktime or Qlab, but does work in VLC.

I also tried using videomonkey as suggested in another thread, but it could not convert the file.

I'm really at a loss as to what to do.

-RJ La Mura

[luckydave]

Try Compressor, which is made by Apple, and available on the Mac App Store. It's $49, but very much worth it, for quick batch conversions of incompatible files. VLC is not guaranteed to give you a file that will work with QLab, and it's probably time that's worth more than $49 to you to figure out how to get VLC to give you the kind of file you need.

-- 
luckydave

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[micpool]

Does the original file play in Quicktime Player

If so, just export it from Quicktime player as 1080p.

Mic

[RJ La Mura]

Mic,

It worked great. Thanks! Any idea why this works?

-RJ La Mura

[micpool]

Probably because there are no options to select. It just gives you a 1080p file in h264 with AAC audio.  If you don't need to optimise video files then the export in QuickTime Player using anything other than the first option on the format dropdown (i.e movie which will leave the format unchanged)  is fairly certain to give you a file that QLab will play.

Mic

[Johannes Halvorsen]

Handbrake is also a nice, free, easy to use, rock solid alternative. It is able to cope with a lot of non-standard codecs and file formats, and if you use the standard presets the resulting vid files is playable on most platforms; even macs... ;)

(Man, how I hate Apple. My only gripe with QLab so far is the OSX-only bit...)