Based on UNSTABLE-21.02.25
6) The speed is not starting at 1.00000 now. It starts at a speed past it. With this clip it’s starting at 1.00028x:
images2.imgbox.com/4c/a5/sdtZJ8aB_o.png
7) I’ve experienced the same thing that @MusicalBox is reporting with the Smooth keyframe. The behavior of it has to be looked at because it’s too erratic to the point of being useless as it’s so unreliable. This doesn’t happen on other keyframes with curves. I’m expecting a smoother transition between two speed points but sometimes it just decides to reverse footage and go forward again and there is nothing on the curves to show that it’s doing that. To reproduce this right after adding the Time Remap filter add three keyframes that are about 4 seconds apart from each other. Do not alter the time or speed on any of them. Just add those three keyframes. Then change the second of those three keyframes to smooth. When you play it back and it gets closer to that second keyframe you will see it reverse for no reason even though no change to speed or time was applied. Here is a demo.
Notice in the demo you can see the aforementioned issue of the speed not defaulting to 1.00000 as the clip has the speed at 1.00018x as its default.
8) Simply adding the Time Remap filter adds crackling sounds to the audio. This can be heard in the demo I just linked to above.
9) I’m not sure what the filter trim buttons are doing now but they behave strange. If I put the playhead right in the middle of the default start and end keyframes and press the left filter trim button then I press the reset button in the time parameter, even if it looks like the start keyframe is at its default position it’s actually frozen. So it ends up that the first half is frozen.
10) Cutting off the start and end of a clip with I or O makes the keyframe timeline end up looking like this:
images2.imgbox.com/8e/81/zyX2QJpk_o.png
11) If you take a clip with the Time Remap applied then strech the end of the clip out to make it longer the result is that the last keyframe is held there as a freeze like this:
images2.imgbox.com/32/e1/x1RHamtN_o.png
Likewise if you strech out the start of the clip then the first keyframe also is held as a freeze like this:
images2.imgbox.com/30/17/DQwEl2iJ_o.png
I think what would be better is that after the strech all the keyframes get their heights dynamically updated to match the time since the frames that have been marked on the keyframes would not be in the same height as per the time depending on the strech. If someone is using this filter decides after setting some keyframes to then make the clip longer because they want to grab a frame from earlier or later to apply to their keyframes with the current way its set they would have to reset the whole keyframe timeline and redo everything.
12) It seems that adding Time Remap alters the colors/tint on a clip.
Frame without Time Remap:
images2.imgbox.com/0a/3e/SXPVHvrZ_o.png
Frame with Time Remap:
images2.imgbox.com/0a/59/MUZVZhII_o.png
The blues in the sky are darker in the original frame without Time Remap.
13) Since you are going to go ahead and debut this filter even with the B frame issue I think that there should be an additional option added to the Convert To Edit Friendly feature. Right now Convert to Edit Friendly converts the entire source file. Most use cases for Time Remap are not going to be using the entire source file especially if a video with a long duration being used. It’s usually just one section or a couple of sections that are used from a longer video. So how about a new added option that gives the user the ability to just use Convert to Edit Friendly on only a selected section instead of converting the whole source file similar to how the Reverse feature only reverses a selected section? So on Convert to Edit Friendly the user can get to pick between two options: Convert the whole source file or convert only the selected section.
With that in mind in order to avoid the big hoop of having to do Source > trim > Export > intermediate or lossless preset > Export File > double-click completed job to do only a selected section, how about when you pick the the Time Remap filter and the dialog comes up instead of it just telling the user that the clip is not compatible and that they have to go ahead and do every step themselves to convert the section they want, that dialog would ask the user if they want to convert the clip to use the filter. When they say yes then they are taking to the Convert to Edit Friendly option to convert just that selected section.
If this filter is going to go ahead anyway then I think that this is the best way to avoid having to go through all the previous suggested steps to get a compatible clip going. However, the one limitation to this is that once this clip is converted what is in the timeline now is limited to just the start and end of the newly converted clip. Since it’s not coming from the source file this means that if the user during their use of Time Remap wants to stretch the clip more on either side or both sides to have more footage to work with they won’t be able to do it. I’m wondering if some kind of an additional option can be created to give the user the chance of going back to the original source file of that selected section to pull more footage from it and convert that to a new file to replace the last Convert to Edit Friendly selected section.
14) When the Blend option is picked in Image Mode it applies it regardless if the footage is going faster, at regular speed or slow. Can there be an option added to only apply Blend if the footage is going faster or slower than 1.00000x?
By the way, could the Blend option be added to Properties near the Speed parameter?