This IS the Avid L2: Re: [Avid-L2] 17.182 Fps .mov ? QT Pro Image Sequence Export?

Thursday, January 7, 2016

Re: [Avid-L2] 17.182 Fps .mov ? QT Pro Image Sequence Export?

MediaInfo says 17.182 fps for this file. The file works for my purposes but I will investigate with compressor. This is a production company logo so I have no idea why it would be 17 fps or 17.182. It seems to play fine at the correct time when imported. Nothing like a standard production element sent out without regard to proper specs. That would never happen until it happens right?

---In Avid-L2@yahoogroups.com, <cutandcover@...> wrote :

I don't know MediaInfo, but I'd say it's probably similar if it is reading out header metadata and giving detailed track/container info. Give it a shot and see what it says.

On Thu, Jan 7, 2016 at 4:23 PM, bigfish@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

How would you compare Media Info to VideoSpec? I've been questioned by Network QC folks based on Media Info Reports they generate so I've adopted that as my go to meta data info for a file. Does VideoSpec do the same thing as Media Info. The Codec for the file is ProRes4444. I'll see what Compressor has to say.

---In Avid-L2@yahoogroups.com, <cutandcover@...> wrote :

Never take QT Pro's FPS reporting as fact. Ever.

VideoSpec will tell you. And likely it will say something showing you minimum, maximum, and average fps - variable frame rate encoding! Animation codec is variable frame rate. Once you determine the actual frame rate, you should transcode it before importing, or put it into an application which can recognize its true frame rate. Compressor is good at this.

On Thu, Jan 7, 2016 at 2:58 PM, John Moore bigfish@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

I was given a production logo graphic the QTPro says is 17.18fps. Media Info also lists the frame rate as 17.182 fps. When I import into a 23.976 1080P Avid project the graphic is 1:11, basically 1.5 seconds. Just to play around I exported a tga image sequence from QT Pro 7 setting the frame rate to 17. This resulted in 25 .tga frames in the sequence. I then did the same thing setting the frame rate to 24 and that resulted in 35 .tga frames. So it appears the frame rate export setting when making an image sequence takes into account the specified duration of the graphic.

I had always thought making something into an image sequence would be a frame for frame kind of thing but clearly QT Pro is maintaining the proper duration for any given frame rate by altering the total number of frames in the image sequence. Anybody know how it does this? Is it doubling frames or what. Given one sequence had 25 images and the other had 35 images somehow 10 extra frames were generated. I've never really thought about this before. I'll continue to play but is there a setting in QT Pro that would just generate one .tga image frame for each frame in the original .mov?

John Moore Barking Trout Productions Studio City, CA bigfish@...