Serious frame rate problems

[Brandon Kraemer]

Sean,

Are your deck control settings set to match to the frame rate you are using on that deck? In other words, if you are using say 23.98 PfS as your source material, your deck control settings need to match that or it will try to digitize with a different time base. Do your clips have audio? If not, it may be tough to tell what frame rate the clips were shot at unless you know for sure. This can also cause problems, if the footage was shot at 29.97, or 24p, or 60i, unless there is audio you can not easily tell what frame rate the deck should be in. If there is audio on the tapes and you hear it, you know your in the correct frame rate mode.

brandon.

[Sean Davison]

no everything the right setting – the clips show up in fcp as 25 fps but quicktime shows them as varying between 23 and 25fps

[Sean Davison]

Oh Ive got a load of stuff digitised thru a Kona and its rock solid!

[Luke Maslen]

Hi Sean,

Capture is less demanding for disks than playback which might explain why you’re having no problems capturing but are dropping frames during playback.

[Sean Davison] “the clips show up in fcp as 25 fps but quicktime shows them as varying between 23 and 25fps”

QuickTime Player is designed for use with streaming Internet media where frame rates are not guaranteed. It is common for QuickTime Player to vary the playback speed but there shouldn’t be much variance.

Can you please run Blackmagic Disk Speed Test and find out what rate it reports for your disk array in case there is a disk speed related issue?

Regards,

Luke Maslen
Blackmagic Design

[Sean Davison]

sorry luke – let me explain whats happening – I’m reconforming a programme in 8bit uncompressed using bm 8 bit 1080i50 setting
FCP reports its fine and plays the sequences with no problems
Then I am xml ing the sequence into Final Touch and grading it – then i rerender and import via XML into Final Cut (5.1.2) The rendered clips are dropping frames when in the timeline but the original quicktimes play fine both in FCP and in QTM Player.

The time line is set to BM 1080i 50 preset and FT is doing XML export – in other words keeping codec etc the same – FT reports the same frame rate discrepancies as Quicktime.

I have solved this problem by recompressing the clips (using FCP Export) to The Same uncompressed 422 codec that they werei originally and this seems to stamp the frame rate on the clip as Both quicktime player and Final Touch now have a clip that they are happy with and I graded and rendered the sequence out with no problem

Disk speed test is giving me 289 read and 285 write speeds

[Luke Maslen]

Hi Sean,

Thank you for this additional information. I’ll see if I can get any clues from the engineers.

Regards,

Luke Maslen
Blackmagic Design

[Sean Davison]

No response from any one!!!!