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T
tsdavis369
Participant
May 12, 2017
Question

Clip references a different clip

  • May 12, 2017
  • 2 replies
  • 388 views

So I'm having a strange issue and I don't know what's causing it. Shot a multi-camera live speaking engagement. We had limited resources so we were unable to create duplicates on-set as we dumped to DIT however before we could back up (less than 24 hours later) I discovered something strange.

Clip_001 - reads on the harddrive as 106GB and should be 1.5hrs long

Clip_002 - reads on the harddrive as 17GB and should be 23 minutes long

Regardless of Mac, PC, Premiere or quicktime, Clip_001 suddenly only plays the content of Clip_002 and Premiere says that the clip is only 23 minutes long and not the 1.5hrs it should be.

It's almost as if Clip_001 is actually being pointed to Clip_002 when clicking on it. Duplicating the clip produces another 106GB file that plays the same content and transcoding leaves me with a 25GB file that is 23 minutes long and contains the same content as Clip_002.

I'm running a deep scan of the drive as it had already been formatted (we had checksum verification tell us everything was good when we dumped) but the longer it runs the less I hold my breath.

Any other ideas would be amazing appreciated.

This topic has been closed for replies.

2 replies

Horshack
Horshack
Legend
May 12, 2017

Download ffprobe. You may need to go to System Preferences -> Security & Privacy to allow it to run since it's downloaded from the internet. Drag the ffprobe file that's inside the DMG into your Applications folder. Then open up a terminal window and do this on each of the clips:

/Applications/ffprobe -show_streams -count_frames

Before pressing enter, find the clip in the finder then drag it to the terminal window so that it'll insert the path+filename of the clip. Then press enter. After each ffprobe execution (Clip_001 and Clip_002), copy the output it produces in the terminal window and paste it into a post here.

E
excited_Genie16B8
Legend
May 12, 2017

One thing that comes to mind as an explanation is spanned clips.  Many cameras will break up long clips into many files, usually under 4GB in size.  When done properly, Premiere Pro will see those individual files as one long clip.  However, when done improperly, Premiere Pro will read each individual file of that spanned clip as the same, long clip.

That 106 GB...is that just one file on the hard drive?  Where are you seeing that figure?

T
tsdavis369Author
Participant
May 12, 2017

I should have mentioned that these are not spanned clips. Two different clips captured on two different cards using the Blackmagic Cinema Camera recording to ProRes.

FFprobe is giving me an error saying it failed to set value and that the option is not found.

I'm currently dumping the footage back to a card to see if the camera can somehow read the original file. If so, I am going to capture that through live-playback to a deck.

Horshack
Horshack
Legend
May 12, 2017

Can you copy 'n paste the error that ffprobe reported here?

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