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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000395||Kdenlive||Effects||public||2008-11-23 13:32||2009-07-23 14:11|
|Priority||normal||Severity||feature||Reproducibility||have not tried|
|Target Version||Fixed in Version|
|Summary||0000395: Realtime Time-Stretching for Video/Audio|
|Description||It would be nice to have realtime time-stretching for video/audio with markers for binding some points of clip to timeline-positions.|
- live-video with bad audio - replace audio with studio records, without making cuts
- music videos
|Tags||No tags attached.|
|Build/Install Method||Distribution package|
Can you clarify what you mean by "realtime time stretching" and "points of clips to timeline positions" in a bit more detail?
How does "realtime stretching" differ from the current clip speed settings?
Do you mean being able to keyframe clip speed?
I think I mean to keyframe clip speed. But with more intuitive GUI:
Set multiple markers on a clip (audio or video), and drag a marker to left/right while leaving the markers stay on their position, which has the effect of time-shifting.
Original Track with markers M1, M2, M3:
Time-Stretching by dragging Marker M2:
By the way: Is it possible to zoom in vertically? This would be also nice to do exact work with audio-clips.
Vegas can Keyframe the speed of clips, using a timeline and keyframes that can be dragged up or down (and not left or right, which wouldn't be visually usable).
It's a very powerful feature, and it really makes a difference compared to Premiere Pro for instance.
This feature would be so nice.
I just stumbled over a few videos.
http://www.youtube.com/watch?v=7BVukS6d8d0 [^] See 2:10. The speed fist move has been increased, about twice as fast now. If you don't know the game, you don't even remark it as it is so smooth.
http://www.youtube.com/watch?v=-ksSIDkwz9w [^] The content is sort of special, but the effects ...
He has done it with Sony Vegas 8.
Actually I don't know any other video editing program except Pinnacle (used years ago for some very very basic things). Therefore I also haven't ever seen how they do such an effect. What I imagine is something 2-dimensional ... I'll add a picture.
This feature would be _really_ cool! (Said it again, yes, but it is true.)
I think Bézier curves would be the wrong way because it isn't granted that it doesn't go backwards. Perhaps the method used in Gimp for color correction is better: Either straight lines or polygone interpolation.
Perhaps this could be mixed by using two sorts of nodes: Inserting a «linear node» draws a straight line from the previous node to the inserted one, and inserting an «interpolation node» would interpolate a polynom over all connected previous interpolation nodes. See attachment.
|my original idea was more in direction of syncing manually video/audio. so a horizontally drag of keypoints (in combination with the possibility to zoom) would make sense.|
Ah, I understand.
I think I should open an own bug report.
Created a new bug report: 0001026
Will delete my attached files, as they don't suit here.
|2008-11-23 13:32||cyberbeat||New Issue|
|2008-11-23 13:32||cyberbeat||Build/Install Method||=> Distribution package|
|2008-11-23 18:28||cinephiliac||Note Added: 0001360|
|2008-11-23 18:28||cinephiliac||Status||new => feedback|
|2008-11-23 18:28||cinephiliac||Category||Transitions => Effects|
|2008-11-23 18:40||cyberbeat||Note Added: 0001361|
|2009-02-05 15:15||LeHomard||Note Added: 0002359|
|2009-06-23 23:46||Granjow||Note Added: 0003415|
|2009-06-23 23:46||Granjow||Status||feedback => acknowledged|
|2009-06-24 00:05||Granjow||File Added: kdenlive-dynamic-clip-speed.png|
|2009-07-02 13:35||Granjow||Note Added: 0003577|
|2009-07-02 13:35||Granjow||File Added: kdenlive-dynamic-clip-speed-curve.png|
|2009-07-02 14:08||cyberbeat||Note Added: 0003578|
|2009-07-02 16:47||Granjow||Note Added: 0003579|
|2009-07-07 13:41||Granjow||Relationship added||related to 0001026|
|2009-07-07 13:41||Granjow||Note Added: 0003614|
|2009-07-07 13:41||Granjow||File Deleted: kdenlive-dynamic-clip-speed.png|
|2009-07-07 13:42||Granjow||File Deleted: kdenlive-dynamic-clip-speed-curve.png|
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