unreverse existing subclip/event

marcinzm wrote on 3/15/2023, 7:33 AM

Hello

I created such code to reverse an event. It works well

Subclip subclip = new Subclip(evnt.Project,
                                               evnt.ActiveTake.Media.FilePath,
                                               new Timecode(),
                                               evnt.ActiveTake.MediaStream.Length,
                                               true,
                                               Path.GetFileNameWithoutExtension(evnt.ActiveTake.MediaPath) + "region_" + p_region_index_global.ToString() + "_reversedMZ");
                                           MediaStream stream_video = subclip.Streams.GetItemByMediaType(MediaType.Video, 0);
Timecode.FromMilliseconds(subclip.Length.ToMilliseconds()));
                                           VideoEvent newVideoEvent = new VideoEvent(evnt.Start, evnt.Length);


                                           vt_reversed_tmp.Events.Add(newVideoEvent);
                                           Take take_video = new Take(stream_video);
                                           newVideoEvent.Takes.Add(take_video);

But after some operations on this reversed event I would like to unreverse it.

How can I reverse reversed subclip (I mean how to unreverse event which is already reversed)?

Can you help me?

Regards

Marcin

Comments

jetdv wrote on 3/15/2023, 8:34 AM

So you had a sub-clip, you turned it into a standard event pointing to the full original file, and now you want it to be a sub-clip again?

marcinzm wrote on 3/15/2023, 8:56 AM

@jetdv

I have subclip which is reserved (as in the code I have mentioned in previous post), then I create an event based on reserved subclip, then I did some operations on it, i.e. adjusted start (let's call it point A) and length (point B), I also splitted this event (point C). Now I want this reserved event not to be reserved. But I want to unreverse event which would contain these operations mentioned in point ABC.

I would be able to do manually by clicking right mouse on this event and unclicked reverse from the menu, but I want to do it programatically.

I hope I explained it well.

Thank you in advance

jetdv wrote on 3/15/2023, 9:09 AM

Ahh. REVERSED as in backwards. In the subclip, you can tell if it's reversed by looking at .IsReversed. You can't just "unreverse" it. You'll need to create a new subclip reversing it again.

marcinzm wrote on 3/15/2023, 9:28 AM

Yes, reversed as in backwards. But when I want to create a new subclip based on reversed subclip I get the error that the object null reference error or something like that, because probably I am not able to get the full file path in the subclip.

jetdv wrote on 3/15/2023, 10:02 AM

The subclip.Media property will give you the original media. You can get the full file path from there.The use the subclip.Start property to get the starting offset and just use the length of the event for the length.

marcinzm wrote on 3/15/2023, 2:32 PM

@jetdv

What is wrong with the below code (I get the error of null instance reference):

foreach (TrackEvent evnt in vt_reversed_tmp.Events)
                   {

                           foreach (Media media1 in myVegas.Project.MediaPool)
                           {
                               if (!media1.IsSubclip())
                               {
                                   continue;
                               }

                               if (!media1.FilePath.Equals(Path.GetFileNameWithoutExtension(evnt.ActiveTake.MediaPath)))
                               {
                                   continue;
                               }

                               Subclip subclip = new Subclip(//evnt.Project
                                                           evnt.ActiveTake.Media.FilePath,
                                                           //evnt.ActiveTake.MediaPath,
                                                           new Timecode(),
                                                           evnt.ActiveTake.MediaStream.Length,
                                                           true,
                                                           Path.GetFileNameWithoutExtension(evnt.ActiveTake.MediaPath).Replace("_reversedMZ", "_unreversedMZ"));

                               p_krok = "step138 "+ Path.GetFileNameWithoutExtension(evnt.ActiveTake.MediaPath).Replace("_reversedMZ", "_unreversedMZ")+Environment.NewLine+ " evnt.ActiveTake.Media.FilePath=" + evnt.ActiveTake.Media.FilePath;
                               MediaStream stream_video = subclip.Streams.GetItemByMediaType(MediaType.Video, 0);

etc.

marcinzm wrote on 3/15/2023, 2:40 PM

I get the above error. The error is thrown on the below line code:

MediaStream stream_video = subclip.Streams.GetItemByMediaType(MediaType.Video, 0);

I tried to display the media1 info:

evnt.ActiveTake.Media.FilePath=Sony FX3_oryginal_2023-03-12 - z Natusia w Muzuem Wodociagow w Bydgoszczy 008_stabilizedregion_9_reversedMZ

media1.FilePath.ToString()=Sony FX3_oryginal_2023-03-12 - z Natusia w Muzuem Wodociagow w Bydgoszczy 008_stabilizedregion_9_reversedMZ

media1.TapeName=

media1.Title=ScriptPortal.Vegas.Subclip

media1.ToString()=ScriptPortal.Vegas.Subclip

media1.Comment=

As you can see there is no full path. I don`t know if the problem is thrown by not full path of "evnt.ActiveTake.Media.FilePath" in the subclip call.

jetdv wrote on 3/15/2023, 2:45 PM

On which line is it showing he error?

This line does look suspicious: new Timecode(), you don't have an actual timecode. How about evnt.ActiveTake.Media.Offset there? (or whatever the offset to the beginning of the sub-clip actually is in the original file.)

jetdv wrote on 3/15/2023, 2:48 PM

What about: subclip.Media.Streams.GetItemByMediaType? I'd probably need more information to really do any testing.

marcinzm wrote on 3/15/2023, 3:07 PM

On which line is it showing he error?

This line does look suspicious: new Timecode(), you don't have an actual timecode. How about evnt.ActiveTake.Media.Offset there? (or whatever the offset to the beginning of the sub-clip actually is in the original file.)

I also noticed that this could be a problem and I changed "new Timecode" to "evnt.Start" and changed "evnt.ActiveTake.MediaStream.Length" to "evnt.Length", but it didn`t solve the problem.

The error is thrown in the line:

MediaStream stream_video = subclip.Streams.GetItemByMediaType(MediaType.Video, 0);

marcinzm wrote on 3/16/2023, 5:23 AM

I solved the issue. I had to changed idea of my script. I thought that if I did some operations (mentioned in previous comments) I would be able to save such changed event to subclip. I noticed that subclip based on media and not event, that's why I would not be able to get full path of subclip event.
I changed my code and even I resigned of the idea of reversing subclip.
Now everything works great. I hope I explain it well and maybe someone can understand the meaning of the error I got - Invalid media object.

m3lquixd wrote on 3/16/2023, 8:09 AM

@marcinzm Could you share the complete script for us to use?

jetdv wrote on 3/16/2023, 10:00 AM

@marcinzm a "Subclip" is a "pointer" to a portion of a media file. That's all it is! That's why I kept saying you need to go back to the original media pointed to by the subclip. It's not a true "clip" - It just says "I'm referencing from this point to this point of this file" and, in your case, "and want to play it backwards".

marcinzm wrote on 3/16/2023, 10:02 AM

I wanted to create a script which let me do some operations on event, cut it and present a cut videoclip till the end. So if the videoclip shot had i.e. 10 seconds and I cut it to 4 seconds I would like to present a videcolip shot from 6 seconds till 10 seconds. It is the short part of idea of my script, but the main idea was completely different.

foreach (Track track in myVegas.Project.Tracks) //SCIEZKA Z VIDEO DO PRZETWORZENIA NA REVERSED
                    {
                        if (track.Mute)
                        {
                            continue;
                        }                        
if (!track.IsVideo())
                        {
                            continue;
                        }                        
foreach (TrackEvent evnt in track.Events)
                        {
                            p_krok = "krok135.5";
                            if (evnt.Mute)
                            {
                                continue;
                            }                            
if (evnt.Start.ToMilliseconds() >= p_evnt_search_Start_after_that_global.ToMilliseconds() && evnt.Start.ToMilliseconds() <= p_evnt_search_End_after_that_global.ToMilliseconds())
                            {
                                Take MyTake = evnt.ActiveTake;
                                String FullPath = MyTake.MediaPath;                                

double p_evnt_length_frame_count_Start = 0, p_evnt_length_frame_count_length = 0;

                                Media subclip = null;                                    
p_evnt_length_frame_count_length = Math.Round((evnt.Length.FrameCount * 100f / 2) / 100f, 0);                                    

subclip = new Subclip(myVegas.Project, FullPath, Timecode.FromFrames(MyTake.Media.Length.FrameCount - Convert.ToInt64(p_evnt_length_frame_count_length)), Timecode.FromFrames(Convert.ToInt64(p_evnt_length_frame_count_length)), false, Path.GetFileNameWithoutExtension(evnt.ActiveTake.MediaPath) + "region_" + p_region_index_global.ToString() + "_reversedMZ");

                                p_krok = "krok135.6";
                                VideoEvent videoEvent = vt_reversed.AddVideoEvent(evnt.Start, evnt.Length);
                                videoEvent.PlaybackRate = 0.5;
                                p_krok = "krok135.7";
                                Take take = videoEvent.AddTake(subclip.GetVideoStreamByIndex(0));                                
evnt.Mute = true;
                                myVegas.UpdateUI();                            }
                        }
                    }                }

m3lquixd wrote on 3/16/2023, 10:13 AM

I recommend when sending a script, use this option here.

marcinzm wrote on 3/16/2023, 10:29 AM

@jetdv

Yes, you are completely right. I have never used subclips in Vegas itself before. I found it out and see how it works and get the solution based on 2 nights of coding. Initialy, before I start coding subclips, I have completely different (and wrong) meaning of it. Finaly I coded what I want.