Video acting jerky/random (Premiere Pro 1.5)

Static//Shifter · 15th December 2006, 11:52

Ok...I feel like I'm going insane trying to figure out just what is going on with some of the video files I'm previewing in both Premiere and Virtualdubmod. Here is what happens:

I'll preview a clip from an mkv file (loaded w/ directshowsource in avisynth). When the file plays in the monitor in Premiere (after a bit of stutter most likely due to a not-so-super computer), things seem fine. But when I slow it down and go frame by frame, looking for the right part of the clip I wish to use, the video starts stuttering around, with frames out of sequence. It all seems rather random, but what usually happens is a frame anywhere from .5s to several minutes finds its way in between the frames I'm slowly going through. Nothing else happens really, just frames appearing where they shouldn't be. I then try hitting "play" instead of going frame-by-frame, and now it no longer appears smooth, but those random frames start jumping in.

I figured this was some kind of FPS problem (the mkv file was 23.970, and I used assumefps(24)), so I took off that line in the avs file, but no luck. (By the way, I had Premiere set for 24 fps). So I tried letting premiere handle the fps conversion, and set it to 24fps, but that did not help either. I also tried exporting it, but the problem still exists (I used huffyuv2.1.1 in project settings, and exported as avi). The codec of the original mkv was h.264, could that be an issue?

So I'm beginning to this this is a premiere issue. So I look at the mkv (using avs once again) in virtualdubmod, and the problem exists there as well. And its just as weird. The file plays fine the first time through, but when I go back and then forward frame-by-frame, it gets weird. Then when I play at normal speed once again, the jumping around still occurs.

Oh, and just for the record, this only seems to not occur with .vob files (I also tried making that mkv an avi file, thinking it was just premiere not liking mkv's, but no luck). I've tried to duplicate the issue with .vob files, but cannot.

Anyone have any ideas?

Thank you ahead of time.

EDIT:grammar

Zarxrax · 15th December 2006, 13:50

You should convert your files to a lossless codec where every frame is a keyframe. Good codecs to use are Huffyuv or Lagarith.
The problem, I assume is that you are accessing the file through DirectShowSource in avisynth, and directshow does not give frame-accurate seeking. By converting to a codec that uses every frame as a keyframe, and accessing the file through a different method (avisource in avisynth, or loading directly into the program) there will be no problems seeking around.

Static//Shifter · 17th December 2006, 19:19

Zarxrax,

Thank you for the reply. I'm on vaca and won't be able to try this for one month, but when I get back, I'll give it a shot. Thank you

nessusing · 2nd January 2007, 23:16

does premiere support avisynth natively? or some plugin used?

krisq · 3rd January 2007, 15:05

needs a plugin. you will find it here.

zambelli · 11th January 2007, 07:58

While that AVS plugin seems to be the best one available, note that it has some issues. For example, if you load too many AVS clips without explicitly limiting the max memory - SetMemoryMax() - it may bring Premiere down crashing. The worst part is, when the AVS plugin crashes Premiere - the app simply disappears, with no chance for saving the project or even getting a crash callstack.

Also, it seems to have some issues with seeking on the timeline. Like, you'll place the current pointer in one spot, and it will just skip to a different place somewhere nearby.

Zarxrax · 11th January 2007, 18:58

Quote:

Originally Posted by zambelli

Also, it seems to have some issues with seeking on the timeline. Like, you'll place the current pointer in one spot, and it will just skip to a different place somewhere nearby.

I have that problem in Premiere Pro even with non-avs files.

Mug Funky · 12th January 2007, 07:58

i find avs seeks better than m2v in premiere... it doesn't seem to understand stream order v display order, leading to very sloppy edits that you swore were right when you made them...

however, i noticed recently that if you perform framerate conversions in avisynth before taking it into premiere, it can have problems when you export (like "Jerkytown - population: your video").

it seems okay so long as there's no funky seeking in the avs file (like with directshowsource, or smartdecimate/restore24)

15th December 2006, 11:52	#1 \| Link
Static//Shifter Registered User Join Date: Dec 2006 Posts: 6	Video acting jerky/random (Premiere Pro 1.5) Ok...I feel like I'm going insane trying to figure out just what is going on with some of the video files I'm previewing in both Premiere and Virtualdubmod. Here is what happens: I'll preview a clip from an mkv file (loaded w/ directshowsource in avisynth). When the file plays in the monitor in Premiere (after a bit of stutter most likely due to a not-so-super computer), things seem fine. But when I slow it down and go frame by frame, looking for the right part of the clip I wish to use, the video starts stuttering around, with frames out of sequence. It all seems rather random, but what usually happens is a frame anywhere from .5s to several minutes finds its way in between the frames I'm slowly going through. Nothing else happens really, just frames appearing where they shouldn't be. I then try hitting "play" instead of going frame-by-frame, and now it no longer appears smooth, but those random frames start jumping in. I figured this was some kind of FPS problem (the mkv file was 23.970, and I used assumefps(24)), so I took off that line in the avs file, but no luck. (By the way, I had Premiere set for 24 fps). So I tried letting premiere handle the fps conversion, and set it to 24fps, but that did not help either. I also tried exporting it, but the problem still exists (I used huffyuv2.1.1 in project settings, and exported as avi). The codec of the original mkv was h.264, could that be an issue? So I'm beginning to this this is a premiere issue. So I look at the mkv (using avs once again) in virtualdubmod, and the problem exists there as well. And its just as weird. The file plays fine the first time through, but when I go back and then forward frame-by-frame, it gets weird. Then when I play at normal speed once again, the jumping around still occurs. Oh, and just for the record, this only seems to not occur with .vob files (I also tried making that mkv an avi file, thinking it was just premiere not liking mkv's, but no luck). I've tried to duplicate the issue with .vob files, but cannot. Anyone have any ideas? Thank you ahead of time. EDIT:grammar Last edited by Static//Shifter; 15th December 2006 at 11:54.

3rd January 2007, 15:05	#5 \| Link
krisq Registered User Join Date: Dec 2003 Location: Poland Posts: 171	needs a plugin. you will find it here. __________________ (!sig)

12th January 2007, 07:58	#8 \| Link
Mug Funky interlace this! Join Date: Jun 2003 Location: i'm in ur transfers, addin noise Posts: 4,267	i find avs seeks better than m2v in premiere... it doesn't seem to understand stream order v display order, leading to very sloppy edits that you swore were right when you made them... however, i noticed recently that if you perform framerate conversions in avisynth before taking it into premiere, it can have problems when you export (like "Jerkytown - population: your video"). it seems okay so long as there's no funky seeking in the avs file (like with directshowsource, or smartdecimate/restore24) __________________ interlace... right or wrong, just deal with it.

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15th December 2006, 13:50	#2 \| Link
Zarxrax Registered User Join Date: Dec 2001 Location: Concord, NC Posts: 942	You should convert your files to a lossless codec where every frame is a keyframe. Good codecs to use are Huffyuv or Lagarith. The problem, I assume is that you are accessing the file through DirectShowSource in avisynth, and directshow does not give frame-accurate seeking. By converting to a codec that uses every frame as a keyframe, and accessing the file through a different method (avisource in avisynth, or loading directly into the program) there will be no problems seeking around.

17th December 2006, 19:19	#3 \| Link
Static//Shifter Registered User Join Date: Dec 2006 Posts: 6	Zarxrax, Thank you for the reply. I'm on vaca and won't be able to try this for one month, but when I get back, I'll give it a shot. Thank you

2nd January 2007, 23:16	#4 \| Link
nessusing Registered User Join Date: Feb 2005 Posts: 37	does premiere support avisynth natively? or some plugin used?

11th January 2007, 07:58	#6 \| Link
zambelli Doom9ing since 2001 Join Date: Oct 2001 Location: Bellevue, WA, USA Posts: 1,910	While that AVS plugin seems to be the best one available, note that it has some issues. For example, if you load too many AVS clips without explicitly limiting the max memory - SetMemoryMax() - it may bring Premiere down crashing. The worst part is, when the AVS plugin crashes Premiere - the app simply disappears, with no chance for saving the project or even getting a crash callstack. Also, it seems to have some issues with seeking on the timeline. Like, you'll place the current pointer in one spot, and it will just skip to a different place somewhere nearby.