-
framerate is a lie!
Hi,
I have a previously rendered video at 29.97fps that I needed to make a 30ish second preview of. So I plopped that full quality uncompressed vid into my sequence (which has a 29.97fps setting) and did my editing and encoded again with the same settings (29.97 fps).Quicktime confirms that the first source video is 29.97, but this new video is 29.06fps despite all the premiere settings.
What could have caused this and how can I get Premiere to give me a clean 29.97?
Heres some other settings:
original video according to quicktime:
Format –
Uncompressed 8-bit 4:2:2, 640 x 480, Millions
16-bit Integer (Little Endian), Stereo (L R), 48.000 kHz
FPS –
29.97
Data size (its uncompressed) –
24.77 GB
Data rate –
148.89 mbits/s
Duration –
0:00:23:49.39
Size
640 x 480 pixelspreview encoded according to quicktime:
format –
Uncompressed 8-bit 4:2:2, 640 x 480, Millions
16-bit Integer (Little Endian), Stereo (L R), 48.000 kHz
FPS –
29.06
data size –
551.37 MB
data rate –
144.40 mbits/s (why is this different???)
size –
640 x 480 pixelsEncode settings in Premiere –
Quicktime format, custom preset
codec: uncompressed YUV 8 bit 4:2:2
quality : 100
640×480
frame rate – 29.97
progressive
square pixels(1.0)
render at maximum depth is on
codec settings: 24 bit
optimize stills is checked -
5 Replies
-
When you bring that rendered file back into Premiere, or Vegas, or FCP, what frame rate does it say the file is?
-
I brought the video that quicktime says is 29.06fps back into premiere and premiere thinks that its 29.97….lies
-
So, my Question to you, who is lying?? Which Version of Quicktime and on what type of System? And why in heavens sake would anything create such a file with a rate of 29.06 fps?
Could also easily be that Premiere knows that 29.06 fps a bogus Frame Rate for the specific file is and bumps it to what it believes it should be.
Also, can you upload teh file or a portion of it somewhere for us to download and intrepret?
cheers
-
For a third opinion: download “GSpot” (freeware), a handy “what kind of video file is this” utility, and see what it says about frame rate.
-jeff
-
My boss is the one who actually noticed the weird framerate using some outside encoding software, and quicktime gave me the same numbers(concatenated to 2 decimals) it was giving her, but another program could be useful especially if it gives more detailed information. I will definitely try Gspot when I get home tonight. I tried rendering out a smaller clip to post, but I ran into some very weird behavior.
All of the small clips that I rendered out were confirmed to be 29.97fps by quicktime. I rendered out several at different lengths and only noticed bad framerates for videos above 30 minutes. Exactly 30 minutes was 29.97, but as I went up from there the fps dropped slightly. I’m willing to upload one of the videos, but they are half a gig for 30 minutes where the errors start occuring.
Reply to this Discussion! Login or Sign Up