Avid codec

[Steven]

Hello all,

Thanks for the very informative group. I've learned a lot perusing the archives.

I use QLab 2 (last version) for playback of digital video files from a MacBook Pro running Lion.  This past weekend I received a film that uses the AVdn codec from Avid, 1920 x 1080 resolution. I downloaded the Quicktime components from Avid and it plays fine in QT player.

However, when I run it from QLab video looks great but alas no audio; everything is greyed out in audio levels tab.

Audio codec is identified as Linear PCM.

Are there different components I need to download for QLab 2 to use the codec?  Do I need to upgrade to 3? I am hesitant to upgrade just before a show.

Full disclosure, I am an abject freeloader, using the unlicensed version for one-off events.  All decidedly non-profit (not just not for profit).

Thanks for the help,

Steve

[Lucas Krech]

Compressor is like $50 which even most freeloaders can afford. That would allow you to save as an alternate codec. 

Also QLab rental licenses are around $3/day which would allow you to do neat things like open saved files. 

-L

*insert witty mobile device advertising here*

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[Christopher Ashworth]

Hi Steven,

Welcome to the list, it's nice to have you here.

On Oct 7, 2013, at 10:14 AM, Steven <lume...@gmail.com> wrote:
>
> I use QLab 2 (last version) for playback of digital video files from a MacBook Pro running Lion. This past weekend I received a film that uses the AVdn codec from Avid, 1920 x 1080 resolution. I downloaded the Quicktime components from Avid and it plays fine in QT player.
>
> However, when I run it from QLab video looks great but alas no audio; everything is greyed out in audio levels tab.
>
> Audio codec is identified as Linear PCM.
>
> Are there different components I need to download for QLab 2 to use the codec? Do I need to upgrade to 3? I am hesitant to upgrade just before a show.

I'm not particularly familiar with that codec, but in general version 3 supports far fewer codecs than version 2, so upgrading won't be helpful for this case.

Version 2 uses QuickTime, and in theory should decode anything that can be decoded by QuickTime. There are some limitations, however, in the sense that QLab requires decoding audio on a background thread, and not all codecs support this. This might be happening here, in which case QLab is decoding the video but ignoring the audio.

Transcoding to a different format may be the best way to go.

Best,
Chris