VSE importing Footage, strip length changes #28509

New Issue

david mcsween · 2011-09-05T03:36:51+02:00

david mcsween commented

2011-09-05 03:36:51 +02:00

%%%Known issue: If I import a strip with a frame rate that differs from the project then the audio and video don't sync.
BUT
New related problem: Now when I do this, the video strip becomes much longer than the audio strip and corrupts all subsequent imports (they all get made long). Even when they are at the matching frame rate (matched between strip and project).

This continues to occur after I restart Blender in a different project.

B 2.59.1 r39825
On win XP Pro. SP3
Core duo E8600
3.25 GB

Demo of broken length strip here:
http://www.2shared.com/file/u1XubMpG/wrong_strip_length_blend.html

%%%

%%%Known issue: If I import a strip with a frame rate that differs from the project then the audio and video don't sync. BUT New related problem: Now when I do this, the video strip becomes much longer than the audio strip and corrupts all subsequent imports (they all get made long). Even when they are at the matching frame rate (matched between strip and project). This continues to occur after I restart Blender in a different project. B 2.59.1 r39825 On win XP Pro. SP3 Core duo E8600 3.25 GB Demo of broken length strip here: http://www.2shared.com/file/u1XubMpG/wrong_strip_length_blend.html %%%

david mcsween commented

2011-09-05 03:36:51 +02:00

Changed status to: 'Open'

david mcsween commented

2011-09-05 04:18:10 +02:00

%%%I was playing around with the Proxy function and found that changing the Timecode type would also corrupt the length of a strip.

I changed my source media type from a Canon DSLR h264 .mov to a regular h264 .mov (via streamclip).
This file imported at the right length.
I generated proxies, and they worked with TC free run.
Then I changed the TC type Record Run and Blender made the Strip jump from 249 frames to 300,000 frames long.

With this many frames Blender could not do sensible navigation of that Sequencer window either.
(Note Blender can't make 3hr20min long movies!)%%%

%%%I was playing around with the Proxy function and found that changing the Timecode type would also corrupt the length of a strip. I changed my source media type from a Canon DSLR h264 .mov to a regular h264 .mov (via streamclip). This file imported at the right length. I generated proxies, and they worked with TC free run. Then I changed the TC type Record Run and Blender made the Strip jump from 249 frames to 300,000 frames long. With this many frames Blender could not do sensible navigation of that Sequencer window either. (Note Blender can't make 3hr20min long movies!)%%%

B M commented

2011-09-05 15:35:31 +02:00

%%%What format are you using? I've seen this exact bug before, but never remembered to report it. There are issues with formats like wmv, and possibly mov. (At least on Linux)%%%

david mcsween commented

2011-09-06 04:30:08 +02:00

%%%On highly compressed HD.
First on .MTS (or M2TS) AVCHD video from Sony handy cams.
Then from .mov that is Quicktime H264, from a Canon DSLR (550D or T2i camera).

Both 25fps 1080i resolution.

Strangely I can get Microsoft Movie maker to play it flawlesly.%%%

%%%On highly compressed HD. First on .MTS (or M2TS) AVCHD video from Sony handy cams. Then from .mov that is Quicktime H264, from a Canon DSLR (550D or T2i camera). Both 25fps 1080i resolution. Strangely I can get Microsoft Movie maker to play it flawlesly.%%%

david mcsween commented

2011-09-25 13:07:20 +02:00

%%%When playing back a proxy without TC, in Windows, I experienced bad playback (only playing 10 frames of proxy).
I have found that Strip durations get corrupted (go to 300,000 frames) if you create a proxy for media, then re-import (or ADD) the media to the timeline again. Or try to re-generate the proxy with different TC settings.

I did this when the strip didn’t seem to play back (No TC generated) and as a test for a strip that did play proxy correctly (generated with TC).

Workaround:
So I have to delete the proxy folder if re-adding the strip (or trying to add TC retrospectively). This fixes the Duration corruption. It maybe that I was wrong at first and this duration error only occurs after proxy generation (without TC).

Can I suggest that the default TC setting should be free run? Instead of No TC.%%%

%%%When playing back a proxy without TC, in Windows, I experienced bad playback (only playing 10 frames of proxy). I have found that Strip durations get corrupted (go to 300,000 frames) if you create a proxy for media, then re-import (or ADD) the media to the timeline again. Or try to re-generate the proxy with different TC settings. I did this when the strip didn’t seem to play back (No TC generated) and as a test for a strip that did play proxy correctly (generated with TC). Workaround: So I have to delete the proxy folder if re-adding the strip (or trying to add TC retrospectively). This fixes the Duration corruption. It maybe that I was wrong at first and this duration error only occurs after proxy generation (without TC). Can I suggest that the default TC setting should be free run? Instead of No TC.%%%

Troy Sobotka commented

2011-10-01 17:18:43 +02:00

%%%Greets David...

I have tested some footage out of an interlaced MTS in another thread and noticed similar issues. I wonder if "Free Run" would have solved the issue.

I have to wonder if the issue is interlacing?%%%

%%%Greets David... I have tested some footage out of an interlaced MTS in another thread and noticed similar issues. I wonder if "Free Run" would have solved the issue. I have to wonder if the issue is interlacing?%%%

Troy Sobotka commented

2011-10-01 17:27:02 +02:00

%%%Is it similar to this footage David? http://projects.blender.org/tracker/?group_id=9&atid=498&func=detail&aid=27815%%%

david mcsween commented

2011-10-12 05:05:01 +02:00

%%%I am now using Proxy function on H264 footage from Canon DSLR. It works if I use TC Free Run.

BUT

If I press the "Refresh Sequencer" button the clips fail to play again. They revert to only playing the first few frames again. Just the same effect as using No TC when generating proxies. For some reason it seems to kill the TC function for playback of strips.

Troy, there was interlacing in my MTS footage but not in the DSLR footage. It is all 25p.%%%

%%%I am now using Proxy function on H264 footage from Canon DSLR. It works if I use TC Free Run. BUT If I press the "Refresh Sequencer" button the clips fail to play again. They revert to only playing the first few frames again. Just the same effect as using No TC when generating proxies. For some reason it seems to kill the TC function for playback of strips. Troy, there was interlacing in my MTS footage but not in the DSLR footage. It is all 25p.%%%

david mcsween commented

2011-10-13 04:00:46 +02:00

%%%The broken playback occurs with the original source as well, if I select it in the preview window properties.

Workaround: Fix playback by deleting all proxy folders.

Result I don't use proxies as their TC seems to kill the playback of media.%%%

%%%The broken playback occurs with the original source as well, if I select it in the preview window properties. Workaround: Fix playback by deleting all proxy folders. Result I don't use proxies as their TC seems to kill the playback of media.%%%

Troy Sobotka commented

2011-12-14 16:35:16 +01:00

%%%Sorry David, I have been out of town for awhile.

Be aware that even though some progressive footage is indeed progressive, it can be stored in an interlaced format. I believe the GH1 progressive format stores that way. I seem to recall interlaced stored formats having issues.

Is there any way you can upgrade all of your ffmpeg libraries and test? I can help you through this if required.%%%

%%%Sorry David, I have been out of town for awhile. Be aware that even though some progressive footage is indeed progressive, it can be stored in an interlaced format. I believe the GH1 progressive format stores that way. I seem to recall interlaced stored formats having issues. Is there any way you can upgrade all of your ffmpeg libraries and test? I can help you through this if required.%%%

Peter Schlaile commented

2012-01-09 22:26:43 +01:00

%%%I'm using Canon DSLRs (5D and 550D) myself and haven't experienced such problems.

So: could you make a small demo video file available somewhere?

(Problem is: blend file alone doesn't help much in reproducing this)

Cheers,
Peter%%%

%%%I'm using Canon DSLRs (5D and 550D) myself and haven't experienced such problems. So: could you make a small demo video file available somewhere? (Problem is: blend file alone doesn't help much in reproducing this) Cheers, Peter%%%

Brecht Van Lommel commented

2012-02-02 16:31:32 +01:00

%%%It seems there is currently not enough information here to try to fix this bug. If you can provide a video file that fails, it could be investigated further. There have been various bug fixes in this area since this report was opened, so perhaps it's fixed already.%%%

Brecht Van Lommel commented

2012-02-02 16:31:32 +01:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2012-02-02 16:31:32 +01:00

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VSE importing Footage, strip length changes #28509