Video SequencerProject
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Description

Video editor built into Blender.

Module Owner: @Peter Schlaile (schlaile)
Developer Members: @Campbell Barton (campbellbarton) @Alexander Kuznetsov (alexk)

Recent Activity

Sat, Apr 21

Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54418: VSE: audio clipping/distorted after render.

@Cerbyo (Kite)
https://docs.blender.org/manual/en/dev/data_system/scenes/properties.html?highlight=scene%20audio#audio

Sat, Apr 21, 5:53 PM · Video Sequencer, Audio, BF Blender
Cerbyo (Kite) added a comment to T54418: VSE: audio clipping/distorted after render.
  1. You can set the scene audio channels under properties -> scene -> audio -> format -> audio channels.
Sat, Apr 21, 3:46 PM · Video Sequencer, Audio, BF Blender
Joerg Mueller (nexyon) added a comment to T54418: VSE: audio clipping/distorted after render.
  1. You have to know what you want to do... If you can do the audio editing in Blender, do it there, if not use some other program.
Sat, Apr 21, 8:08 AM · Video Sequencer, Audio, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54418: VSE: audio clipping/distorted after render.

@Cerbyo (Kite) I'll post on the BSE.

Sat, Apr 21, 12:39 AM · Video Sequencer, Audio, BF Blender

Fri, Apr 20

Cerbyo (Kite) added a comment to T54418: VSE: audio clipping/distorted after render.

So this is what I'm getting from all this:

  1. The 32 channels of the blender vse are called channels but they aren't the same as audio channels (aka mono being 1, stereo 2 channel).
Fri, Apr 20, 11:47 PM · Video Sequencer, Audio, BF Blender
Aaron Carlisle (Blendify) added a comment to D3163: VSE: Remove Add, Sub, Mul effects.

If anyone can give me some advice on how to do the versioning code to automatically convert to the new effect type that would be amazing.

Fri, Apr 20, 2:15 AM · Video Sequencer
Aaron Carlisle (Blendify) updated the summary of D3163: VSE: Remove Add, Sub, Mul effects.
Fri, Apr 20, 2:14 AM · Video Sequencer

Tue, Apr 17

Olly Funkster (Funkster) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

I just downloaded your sample... it only contains 1391 video frames (checked by transcoding it with ffmpeg and looking at the frame count at the end).

Tue, Apr 17, 7:06 PM · BF Blender, Video Sequencer
Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

@Louigi Verona (LouigiVerona) Try importing your converted video in 2.79b (or preferably a daily build) and see if the problem persists.

Tue, Apr 17, 6:36 PM · BF Blender, Video Sequencer
Louigi Verona (LouigiVerona) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

Okay, so I just took the test video which I supplied, used Handbrake to convert it to 30 constant fps. Now Codec info says exactly 30 fps.

Tue, Apr 17, 1:07 PM · BF Blender, Video Sequencer
Olly Funkster (Funkster) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

Since the audio length in your reports is the same between 2.76b and later versions, and it's the video that has changed length, I would argue that 2.76b was getting the video length wrong somehow. It may even be a difference in ffmpeg / libavcodec rather than in blender itself, since the library versions also change between blender releases.

Tue, Apr 17, 12:21 PM · BF Blender, Video Sequencer
Louigi Verona (LouigiVerona) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

Stephen, this is all fine, but somehow Blender 2.76b was doing it correctly, without requiring me to use Handbrake or any other converter.

Tue, Apr 17, 11:51 AM · BF Blender, Video Sequencer
stephen paschke (paskperfect) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

Yes, this in general is how all cameras and video recorders work, these days. Why? Gone are the days when you needed a bit of magnetic tape to move across a tape-head at a constant rate, or a constant 33 1/3 rotations per minute to faithfully reproduce video or sound.
All readily-available video and audio is compressed in some form, to either make it fit into a smaller distribution medium, or stream "faster" through phone lines, to save someone time, or money.
Before you load a file for editing in Blender, consider using a program (such as Handbrake) that can convert between variable-rate and constant-rate frames-per-second formats. You might also try FFMPeg, which is used by both Blender and Handbrake to do their video conversions for exporting to different formats. Handbrake is a lot easier to work with, than FFMPeg, though.
Other editing suites do similar conversions, without telling you about it, and still take just as long to process.

Tue, Apr 17, 9:43 AM · BF Blender, Video Sequencer

Mon, Apr 16

Louigi Verona (LouigiVerona) added a comment to T54655: Importing any video to VSE results in audio and video having different lengths.

I am not sure how is this possible, unless this is really how all cameras and videos in general work. And somehow Blender 2.76b does everything correctly, whereas the "correct" frame rate of later versions results in audio and video being out of sync.

Mon, Apr 16, 5:52 PM · BF Blender, Video Sequencer
Christopher Anderssarian (Christopher_Anderssarian) added a project to T54655: Importing any video to VSE results in audio and video having different lengths: BF Blender.

Having a look at the metadata; the audio is longer than the video:
Video: Line 23: 46 s 361 ms
Audio: Line 50: 46 s 784 ms
Blender seems to be setting the correct frame rate there's just a bit of extra audio.

1​General
2​Complete name : C:\Users\admin\Downloads\T54655\20180415_111352.mp4
3​Format : MPEG-4
4​Format profile : Base Media
5​Codec ID : isom (isom/3gp4)
6​File size : 94.7 MiB
7​Duration : 46 s 784 ms
8​Overall bit rate : 17.0 Mb/s
9​Encoded date : UTC 2018-04-15 09:14:40
10​Tagged date : UTC 2018-04-15 09:14:40
11
12​Video
13​ID : 1
14​Format : AVC
15​Format/Info : Advanced Video Codec
16​Format profile : High@L4
17​Format settings : CABAC / 1 Ref Frames
18​Format settings, CABAC : Yes
19​Format settings, RefFrames : 1 frame
20​Format settings, GOP : M=1, N=30
21​Codec ID : avc1
22​Codec ID/Info : Advanced Video Coding
23​Duration : 46 s 361 ms
24​Bit rate : 17.0 Mb/s
25​Width : 1 920 pixels
26​Height : 1 080 pixels
27​Display aspect ratio : 16:9
28​Frame rate mode : Variable
29​Frame rate : 30.000 FPS
30​Minimum frame rate : 29.499 FPS
31​Maximum frame rate : 30.529 FPS
32​Color space : YUV
33​Chroma subsampling : 4:2:0
34​Bit depth : 8 bits
35​Scan type : Progressive
36​Bits/(Pixel*Frame) : 0.273
37​Stream size : 94.0 MiB (99%)
38​Title : VideoHandle
39​Language : English
40​Encoded date : UTC 2018-04-15 09:14:40
41​Tagged date : UTC 2018-04-15 09:14:40
42​mdhd_Duration : 46361
43
44​Audio
45​ID : 2
46​Format : AAC
47​Format/Info : Advanced Audio Codec
48​Format profile : LC
49​Codec ID : mp4a-40-2
50​Duration : 46 s 784 ms
51​Source duration : 46 s 786 ms
52​Source_Duration_FirstFrame : 2 ms
53​Bit rate mode : Constant
54​Bit rate : 128 kb/s
55​Channel(s) : 2 channels
56​Channel positions : Front: L R
57​Sampling rate : 48.0 kHz
58​Frame rate : 46.875 FPS (1024 SPF)
59​Compression mode : Lossy
60​Stream size : 704 KiB (1%)
61​Source stream size : 704 KiB (1%)
62​Title : SoundHandle
63​Language : English
64​Encoded date : UTC 2018-04-15 09:14:40
65​Tagged date : UTC 2018-04-15 09:14:40
66​mdhd_Duration : 46784

Mon, Apr 16, 4:23 PM · BF Blender, Video Sequencer
Louigi Verona (LouigiVerona) created T54655: Importing any video to VSE results in audio and video having different lengths.
Mon, Apr 16, 1:16 PM · BF Blender, Video Sequencer

Sun, Apr 15

Joerg Mueller (nexyon) added a comment to T54418: VSE: audio clipping/distorted after render.

If your source audio file isn't using the full dynamic range of the amplitude, it is basically wasting quality. Most audio files have a dynamic range of 16 bit. If you have to double the amplitude (volume in blender = 2), you are already wasting one of these bits. At 10, you are already wasting more than 3 bits. So for any recording engineer the goal is to utilize the whole dynamic range to not lose any quality during recording. When you have a file that doesn't use the full dynamic range, then increasing the volume in audacity instead of blender doesn't make any difference in terms of outcome, so you could just do it in blender directly. The problem is of course that you don't by how much, so using audacity makes sense after all. As soon as you normalized the volume in audacity, you are using the full dynamic range, going higher in blender then leads to clipping.

Sun, Apr 15, 11:22 AM · Video Sequencer, Audio, BF Blender

Fri, Apr 13

Cerbyo (Kite) added a comment to T54418: VSE: audio clipping/distorted after render.

I don't understand why you said

Fri, Apr 13, 4:57 AM · Video Sequencer, Audio, BF Blender

Wed, Apr 11

Daniel Oakey (doakey3) added a comment to D2424: Add font selection to VSE text strips.

@Justin Moore (DrChat) I too am anxiously awaiting this feature. How's development coming along? Any chance we'll see this feature in 2.8?

Wed, Apr 11, 5:00 AM · Video Sequencer
Daniel Oakey (doakey3) updated subscribers of D2424: Add font selection to VSE text strips.
Wed, Apr 11, 4:59 AM · Video Sequencer

Tue, Apr 10

Joerg Mueller (nexyon) closed T54418: VSE: audio clipping/distorted after render as Invalid.

Ok, then I'll close this. There is no difference in processing of the strips between mixdown and rendering. Not even to playback, the only difference there is that the user settings are used in terms of channels and sample rate.

Tue, Apr 10, 8:12 PM · Video Sequencer, Audio, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54418: VSE: audio clipping/distorted after render.

...This approach is volume preserving and is also what OpenAL does, though Blender doesn't use OpenAL to do this in the sequencer.

Tue, Apr 10, 7:08 PM · Video Sequencer, Audio, BF Blender
Joerg Mueller (nexyon) added a comment to T54418: VSE: audio clipping/distorted after render.

Ok, changing the number of channels is another story. Blender supports surround sound (=more than two channels) in contrast to Audacity.

Tue, Apr 10, 5:39 PM · Video Sequencer, Audio, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54418: VSE: audio clipping/distorted after render.

Thanks @Joerg Mueller (nexyon) for the clarification.

Tue, Apr 10, 12:02 AM · Video Sequencer, Audio, BF Blender

Mon, Apr 9

Joerg Mueller (nexyon) added a comment to T54418: VSE: audio clipping/distorted after render.

Ok, there is a lot going on here and a lot of the information written here is just plainly wrong. Let me try to summarize: you're setting the volume of an audio strip to 10 and get an output that is clipped. Well, that's expected. I tried this and whatever I do, it always sounds the same - whether I play back in Blender (SDL or OpenAL), mix down (wav or flac) or render to a video (matroska, PCM). In that sense, I cannot reproduce the bug report.

Mon, Apr 9, 10:56 PM · Video Sequencer, Audio, BF Blender

Sat, Apr 7

Christopher Anderssarian (Christopher_Anderssarian) updated subscribers of T54259: Scene Proxies in the Video Sequence Editor.

Adding @Sergey Sharybin (sergey) & @Bastien Montagne (mont29) as after a quick search seem to be the most active on the subject of VSE Proxies.


Sat, Apr 7, 7:32 PM · Rendering, Images & Movies, Video Sequencer, BF Blender

Fri, Apr 6

Christopher Anderssarian (Christopher_Anderssarian) closed T53687: VSE Detecting and setting incorrect frame rate as Resolved.

First part has been fixed.
Second part fixed by @Sergey Sharybin (sergey) in D3083 rB370a2d6917eb

Fri, Apr 6, 8:12 PM · Rendering, Video Sequencer, BF Blender
Philipp Oeser (lichtwerk) closed T54394: scene sub-option not appear in video sequence editor as Resolved.

Closing then

Fri, Apr 6, 11:35 AM · Video Sequencer, BF Blender

Thu, Apr 5

Cerbyo (Kite) added a comment to T54418: VSE: audio clipping/distorted after render.

I did my first serious non-linear editing with other linux-based editors, that required rendering of audio and video separately, and then muxing them together for the final file. Computers have gotten better and faster, so sometimes it is easy to forget that there are ways to put less stress on the way data flows in computer hardware.

Thu, Apr 5, 7:57 AM · Video Sequencer, Audio, BF Blender

Wed, Apr 4

Philipp Oeser (lichtwerk) assigned T54507: Scene Strip broke part of animation functionality in VSE to Joshua Leung (aligorith).

Can confirm this, too. Maybe this is for @Joshua Leung (aligorith) ? (feel free to throw back at me and I can see what I can do...)

Wed, Apr 4, 11:37 AM · Video Sequencer, BF Blender
Michael Soluyanov (crantisz) added a comment to T54507: Scene Strip broke part of animation functionality in VSE.

Problem appears in 2.79b

Wed, Apr 4, 9:41 AM · Video Sequencer, BF Blender
stephen paschke (paskperfect) added a comment to T54418: VSE: audio clipping/distorted after render.

I like your idea, Cerbyo (Kite).
Starting with the best sound possible, and adjusting volumes downward (by ear, or numbers) seems reasonable, if you are trusting of your hearing. But I have been working with blender for many years, and would caution you to stay vigilant, with visual ques (from the Audacity graphical images), as well. Projects (in Blender) that have many small clips moved around, and key-frame adjustments to volume levels, can be taxing on some computer processors.

Wed, Apr 4, 5:55 AM · Video Sequencer, Audio, BF Blender
Cerbyo (Kite) added a comment to T54418: VSE: audio clipping/distorted after render.

Right. As a workaround for 'all' of the mentioned oddities and limitations and differences, and in the interests of mimicking the process of programs like audacity, would this work?:

Wed, Apr 4, 2:06 AM · Video Sequencer, Audio, BF Blender

Tue, Apr 3

Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54507: Scene Strip broke part of animation functionality in VSE.

Creating a file from scratch in 2.79b produces reported issue for me. (on Windows)

Tue, Apr 3, 9:41 PM · Video Sequencer, BF Blender
ronan ducluzeau (zeauro) added a comment to T54507: Scene Strip broke part of animation functionality in VSE.

Provided .blend file contains the issue. But I did not manage to reproduce issue from scratch with 2.79b or master under ubuntu 16.04.

Tue, Apr 3, 8:51 PM · Video Sequencer, BF Blender
Michael Soluyanov (crantisz) created T54507: Scene Strip broke part of animation functionality in VSE.
Tue, Apr 3, 4:13 PM · Video Sequencer, BF Blender
Philipp Oeser (lichtwerk) added a comment to T54490: VSE breaks when I insert or remove headphones.

just noting that it works fine here on linux with my headphones

Tue, Apr 3, 11:38 AM · Video Sequencer, BF Blender

Mon, Apr 2

Dalai Felinto (dfelinto) closed T54437: Sequencer preview uses last updated scene as Resolved.

Fixed on rB26b9c502edce and in rB9f60c850f999.

Mon, Apr 2, 11:57 PM · Video Sequencer, BF Blender: 2.8
Aaron Carlisle (Blendify) closed T53292: blender vse cant deal with exr files as Resolved by committing rBM4191: Fix T53292: add warning about the lack of multilayer exr support in the vse.
Mon, Apr 2, 6:21 PM · Video Sequencer, Documentation
Aaron Carlisle (Blendify) added a comment to T53292: blender vse cant deal with exr files.

From my quick testing regular exr works but multilayer exr does not work. I will add a note in the manual.

Mon, Apr 2, 6:11 PM · Video Sequencer, Documentation
Chase (cheeseman585) created T54490: VSE breaks when I insert or remove headphones.
Mon, Apr 2, 4:53 AM · Video Sequencer, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) updated subscribers of T54418: VSE: audio clipping/distorted after render.

@Joerg Mueller (nexyon)
Your humble wizdom?

Mon, Apr 2, 1:41 AM · Video Sequencer, Audio, BF Blender

Sun, Apr 1

Christopher Anderssarian (Christopher_Anderssarian) raised the priority of T54117: VSE - Movie clip undistorted - proxy not working from Confirmed to Needs Triage.

Maybe I shouldn't triage tasks without them being assigned (and therefore forgotten about or over looked).
Sorry...

Sun, Apr 1, 9:18 PM · Video Sequencer, BF Blender

Sat, Mar 31

stephen paschke (paskperfect) added a comment to T54418: VSE: audio clipping/distorted after render.

I chimed in, just to let you know that I didn't think it was a good idea to use a volume level of '10', and expect that there wouldn't be a problem with an audio strip in the VSE.

Sat, Mar 31, 6:47 AM · Video Sequencer, Audio, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added a comment to T54418: VSE: audio clipping/distorted after render.

After having done some testing;
there is a peculiarity to the way Blender downmixes (and whatever the name is for doing the opposite).

Sat, Mar 31, 2:02 AM · Video Sequencer, Audio, BF Blender

Fri, Mar 30

stephen paschke (paskperfect) added a comment to T54418: VSE: audio clipping/distorted after render.

Responding to Cerbyo (Kite):

Fri, Mar 30, 11:00 PM · Video Sequencer, Audio, BF Blender
Cerbyo (Kite) added a comment to T54418: VSE: audio clipping/distorted after render.

I don't fully understand the process or how the community works as of yet. Forgive me on that front. Question: Is this case still open, do I need to give it more time, or is it a case of people can't recreate what I said and its dismissed? I feel like I'm making a big deal out of something that has been that way for a very long time and is deemed a nonissue. The more I learn, and I'm learning alot here, the more I come to the conclusion that this is a 'purposely' built limitation of the VSE, but I'm the only one who thinks its a clear decisive limitation and a huge deal!

Fri, Mar 30, 12:57 AM · Video Sequencer, Audio, BF Blender

Thu, Mar 29

Dalai Felinto (dfelinto) updated the task description for T54437: Sequencer preview uses last updated scene.
Thu, Mar 29, 1:42 PM · Video Sequencer, BF Blender: 2.8
Dalai Felinto (dfelinto) updated subscribers of T54437: Sequencer preview uses last updated scene.

While --enable-copy-on-write will assert if you try opening this file (P648 if @Sergey Sharybin (sergey) is interested), when re-creating from scratch the error is still there.

Thu, Mar 29, 1:37 PM · Video Sequencer, BF Blender: 2.8
Dalai Felinto (dfelinto) added a comment to T54437: Sequencer preview uses last updated scene.

More info: For testing changing color management exposure should be enough to trigger the bug, however you also need to change the frame to see the issue.

Thu, Mar 29, 1:11 PM · Video Sequencer, BF Blender: 2.8