The start of audio waveforms do not show?

Hello all,

I've been running into this issue for a while now and I'm not sure how to fix it.

I can't see the audio waveforms for the videos I import but I can see the waveforms at the end of each video.

Please see the below screenshot. Please help!

[Peter Chamberlain]

Is this using v18.0 beta 6?

I had this problem too with the other betas.
Here with beta 6, for me it stops at 19-20 secs

Are your files from VEAI? Because my screenshot here is with a file that was upscaled with it.

I don't know if it's relevant, but in my example, on the left, it's the original video that shows the beginning of the waveform, and on the right it's the one coming out of VEAI.

In Fairlight, with the same test file

PS.
BMD definitively should allow .webp files to be uploaded on the forum, way smaller. I guess it's just a filter on the extension of the filenames?

"The file is too big, maximum allowed size is 1 MiB.", it would be easier to share "video" to showcase the bugs

I had to reduce to 320x320 to fit here

I had this problem too with the other betas.
Here with beta 6, for me it stops at 19-20 secs

Are your files from VEAI? Because my screenshot here is with a file that was upscaled with it.

My files are just normal mp4 video files downloaded from Twitch.tv.. I don't think there's anything too special bout em.

Is this using v18.0 beta 6?

yep! it's using the latest version

I've noticed that its the first 20 seconds exactly that don't have audio waveforms

Yeah like me
Can you test on the Fairlight page if when you middle-mouse click and mouve the timeline the waveform appears and disappears (while you're zoomed in on the first 20 secs portion)

Hello, I am having the same issue as the OP. Beginning with the first beta of resolve 18, all my audio waveforms have the same 20 second gap. The audio plays normally most of the time (sometimes there is half a second or so of intermittent silence, but subsequent playbacks and the final renders don't have that issue). However, the waveform has that 20 second blank at the beginning of each audio file. The rest of the waveform is aligned correctly with the audio. I've had this happen on many different types of clips including bmpcc4k raw files, gopro hevc files and more. Needless to say this can make it difficult to work on some of the audio.

Yeah like me
Can you test on the Fairlight page if when you middle-mouse click and mouve the timeline the waveform appears and disappears (while you're zoomed in on the first 20 secs portion)

I tested this on my end and didn't have the issue you are describing. It is possibly unrelated to the OPs waveform issue.

EDIT: To expand on how the audio plays: After testing this further, I have noticed that when playing back audio that has the messed up waveform, there are some issues. When playing back audio in a project, when the playhead moves to a new clip and that clip has the missing segment of waveform there will be silence in the audio most of the time. However, if I stop playback and place the playhead anywhere in the section of audio with the missing waveform and play the audio will playback fine. It only seems to have the silence when the playhead moves on to a new clip with the missing waveform. If I cut the section of audio with the missing waveform out then playback is normal.

normal mp4 video files downloaded from Twitch.tv.(

From an NLE standpoint, I would argue that 'normal' MP4 files don't come from the Internet, they come from cameras.

You're starting at the wrong end of the production chain here. It's not surprising that things don't always work when you do that.

It doesn't matter, it's a bug. V17 didn't have this bug.
And there is no "starting point" of anything. A video file is a video file, what created it DON'T MATTER! What do you think mp4 file are encoded with?! Special magic firmware in cameras?

I would argue that 'normal' MP4 files don't come from the Internet, they come from cameras.

it's so weird to read something like this. Are you doing this on purpose? To mess with people?

The point is, Resolve have a problem with "normal" mp4 files. There is nothing to argue, omg!

MP4 files don't come from the Internet

Riiiight, because only video recorded by a camera have the right to create a mp4 file lol
I should stop sharing my mp4 files to others by using "the internet", because then they would come from the internet

Holy smokes!

I was thinking that perhaps a sample file that exhibits this behaviour would be worth a try. I wouldn't mind testing it on my Mac if you want to post a link. I'm assuming that I would just need to drop the clip onto a timeline to see the behaviour you describe?

I would be happy to test a file on Windows as I have never seen this problem.

I just made 2 files using Topaz VEAI.
The first clip (left) is less than 20 secs, the waveform doesn't appear (for me).
The second one (right) is a bit longer, and it shows the cut-off (for me).

Here the two files : https://www.swisstransfer.com/d/c49f652 ... 265df16257

tylrae could share a clip from Twitch, but I think anyone could download one from Twitch to test

PS.
I'm sorry for the size of the file but I forgot to change the compression level on VEAI, I left it at 0

Here a random twitch clip I just found

https://clips-media-assets2.twitch.tv/4 ... gw-720.mp4

I just tested myself now, same as VEAI, the first 20 secs wavform don't show up

EDIT :
MediaInfo shows similarities between my file and the twitch file
Mine on the left (from VEAI), twitch clip on the right

I tried both clips from VEAI and both were missing the first couple of seconds of audio (including waveforms). What is also somewhat odd is that I can play these in QuickTime and they aren't missing the first two seconds of audio but QuickTime complains that there is something wrong with them and that they may not be compatible with QuickTime. This test was performed on my Mac (see my signature), running 18 beta6 under Monterey 12.4.

Front of the waveform is missing here on Windows. MediaInfo tells me that it is variable frame rate which is more than likely the problem.

I started working on a new project to test this out a bit more. The problem persists with most files I've thrown at it except for plain stereo mp3 files at constant bitrate so perhaps there is something to that. I also didn't notice the issue with my linear pcm audio from the bmpcc4k raw files. The AAC audio from gopro clips and dji clips both exhibit this issue. It doesn't matter which audio track the files are on in the timeline. I've also noticed some oddities in the audio after rendering some test files. The audio clips that are affected occasionally render with audio glitches like starting in mono or starting with only one stereo channel playing. Hopefully some headway is made on this issue as it makes working with audio difficult and this issue wasn't present in Resolve 17 for me.

Hi, i registered just to add to this:

I Have Samsung S22 Ultra, and starting Beta 6 of DR18 I am getting the same issue as reported here, first 20 seconds of clips sound waveform is missing. this is on every single clip.

previously i was on Beta 4 and everything was fine.. the problem is i never backed up database, and now i can't go back. but even if i do go back it won't work. Downgrading all the way to latest 17 DR, everything is fine, but i can't possibly bring back the database. I hope this can be fixed ASAP. If anyone needs a clip sample let me know. I've wasted 3 days of trying to fix this without any success.

Yeah like me
Can you test on the Fairlight page if when you middle-mouse click and mouve the timeline the waveform appears and disappears (while you're zoomed in on the first 20 secs portion)

Doing this does not make the waveform appear.

I just made 2 files using Topaz VEAI.
The first clip (left) is less than 20 secs, the waveform doesn't appear (for me).
The second one (right) is a bit longer, and it shows the cut-off (for me).

Here the two files : https://www.swisstransfer.com/d/c49f652 ... 265df16257

tylrae could share a clip from Twitch, but I think anyone could download one from Twitch to test

PS.
I'm sorry for the size of the file but I forgot to change the compression level on VEAI, I left it at 0

Hi there, here is an example clip where the first 20seconds are missing
https://clips.twitch.tv/SmoggyTemperedLionAMPTropPunch-ZAPqLgg93kDhyygT

this remains unsolved for me as of today

Same, i had to go back all the way to 17

@tylrae

I am experiencing the same issue. See my post in this other thread for a case similar to yours.

viewtopic.php?f=36&t=161977

I do hope this gets addressed too.

Charles (above) suggested that this is an issue with variable frame-rate footage (which Resolve does not handle well as has been previously documented). Is it possible for those experiencing this issue with their footage that the footage is variable frame-rate?

Curious

I've tested both of the Topaz VEAI files and though the framerate is constant, they both display missing audio waveforms. Also, VLC will not display thumbnails for the files, Media Player will not play the video content, neither will Quicktime Player. So there is definitely something not right with these videos in the first place.

I have just run one of the files through Shutter Encoder saving it as h264. Now the waveform works in Resolve. So transcoding is something you are going to have to do to make these files work.

As an aside, you can see that the original clip has a video problem manifested as the black frames at the start.

I have another video that might represent this problem. As far as I can tell it is a well-formed video file. It was recorded using Filmic Pro on an iPhone 11 pro.

The first video linked here is h265, and it is directly from Filmic Pro. The second video is a re-encoding using Shutter to h264 and 24 constant frame rate. Both videos exhibit the missing waveform problem for me.

https://drive.google.com/open?id=1-AgLN ... p=drive_fs

https://drive.google.com/open?id=1-UNsO ... p=drive_fs

Unfortunately, the stable release version of resolve 18 still exhibits this issue for me, unlike the previous v17.

Hi, 18.0 has fixed this for me, yey!

[Peter Chamberlain]

Unfortunately, the stable release version of resolve 18 still exhibits this issue for me, unlike the previous v17.

If u can post a sample clip, ur system info and a drp with that clip someone might be able to repo

Hi, 18.0 has fixed this for me, yey!

I also think the final v18 release fixed this for me. I did have to delete the waveform cache files and restart Resolve, but then I was good. I'm hoping to do some more testing to confirm that things work.

Taken the second post in this thread.
viewtopic.php?f=21&t=101752

Ok I found the cache files for waveforms located in ../CacheClip/audio/Users/blah/location/to/audio/files/*.wav.pfl

Deleting them with Resolve closed seems to force it to rebuild them when you reopen. This really needs a menu command!

---

@Peter Chamberlain, does the Resolve team have an official stance on Resolve's compatibility with videos from smartphones--which all have variable framerates to my knowledge?

I could not find a definitive answer on the web. Resolve 17 gave me audio syncing trouble, but things seem like they might be fixed in 18. I wonder if VFR-footage-compatibility was something that was specifically addressed by the devs. Much thanks.

[Peter Chamberlain]

We have done some work to improve VFR support but even then, some devices/screen recording apps use a wildly variable range so I can’t say all devices and formats are supported

We have done some work to improve VFR support but even then, some devices/screen recording apps use a wildly variable range so I can’t say all devices and formats are supported

Ok, got it. I appreciate the answer.

Unfortunately, the stable release version of resolve 18 still exhibits this issue for me, unlike the previous v17.

If u can post a sample clip, ur system info and a drp with that clip someone might be able to repo

Sure, so I have linked a zipped folder containing the drp, a screenshot of the timeline and 4 clips straight out of 4 different cameras. The only camera that doesn't exhibit this issue anymore is the pocket 4k (it used to). Two of the clips are shorter so the waveform doesn't show for those at all.

https://1drv.ms/u/s!AmDTFJDf7uNmjP0tLXR ... Q?e=Pc6Vd5

System specs: Amd ryzen 7 5800x, nvidia geforce rtx3080, 32gb ddr4-3600 ram, windows 11, davinci resolve studio 18

Unfortunately, the stable release version of resolve 18 still exhibits this issue for me, unlike the previous v17.

If u can post a sample clip, ur system info and a drp with that clip someone might be able to repo

Sure, so I have linked a zipped folder containing the drp, a screenshot of the timeline and 4 clips straight out of 4 different cameras. The only camera that doesn't exhibit this issue anymore is the pocket 4k (it used to). Two of the clips are shorter so the waveform doesn't show for those at all.

https://1drv.ms/u/s!AmDTFJDf7uNmjP0tLXR ... Q?e=Pc6Vd5

System specs: Amd ryzen 7 5800x, nvidia geforce rtx3080, 32gb ddr4-3600 ram, windows 11, davinci resolve studio 18

I downloaded this media and project and the waveforms appear just fine on my MacBook Pro (see signature) running Monterey 12.4.

I downloaded this media and project and the waveforms appear just fine on my MacBook Pro (see signature) running Monterey 12.4.

I wonder if it's a bug only in the windows version then. If someone on windows 11 could test it to confirm whether it is fixed or not for them, it would help to isolate the issue more.

I downloaded this media and project and the waveforms appear just fine on my MacBook Pro (see signature) running Monterey 12.4.

I wonder if it's a bug only in the windows version then. If someone on windows 11 could test it to confirm whether it is fixed or not for them, it would help to isolate the issue more.

@treben, I gave this a shot on OSX and Windows 11. Waveforms show up for me on both systems. See my screenshots here.

https://drive.google.com/drive/folders/ ... sp=sharing

NOTE: On windows there is no video for the mp4 file, I guess I'm missing some codec, maybe HEVC.

On windows, the timeline and timeline thumbnail is missing a waveform on the CUT page. This happens on OSX sometimes too. But the actual clips look ok on the CUT page.

The EDIT page looks good unlike your screenshot.

On both OSX and Windows, some of the clips have no waveform for the first few frames. You can see this is some of my screenshots. This happens to me with Filmic Pro clips consistently, but the same issue appears in Final Cut Pro, so I'm thinking it's just how some apps encode things. But this is not the missing-big-chunk-of-waveform issue that the original post (and my earlier post) was about. I think this is just an artifact of these clips.

Hope this helps move things forward.

I'm curious if you deleted you waveform cache like a I mentioned further up. That helped me a bunch.

Trevor, I downloaded your files. All open in the Timeline and all show the audio waveform. The Panasonic and GoPro footage have a gap in the audio at the front and no sound in these gaps when played. The Braw and DJI footage have no problems at all.
All the clips have been tested in their own correct frame rate timelines and the results are the same.

Could this be a sync issue? Do you have a GoPro or Panasonic clip that has a distinct visual sync point in it, and are the pic and audio aligned?

On both OSX and Windows, some of the clips have no waveform for the first few frames. You can see this is some of my screenshots. This happens to me with Filmic Pro clips consistently, but the same issue appears in Final Cut Pro, so I'm thinking it's just how some apps encode things. But this is not the missing-big-chunk-of-waveform issue that the original post (and my earlier post) was about. I think this is just an artifact of these clips.

Hope this helps move things forward.

I'm curious if you deleted you waveform cache like a I mentioned further up. That helped me a bunch.

Hello and thank you for your help in trying to isolate this problem. I did indeed try deleting the waveform cache, as well as starting a fresh project with new clips.

Could this be a sync issue? Do you have a GoPro or Panasonic clip that has a distinct visual sync point in it, and are the pic and audio aligned?

I do have many clips of people talking that exhibit these issues but the audio is synced properly in them so I don't believe it is a sync issue.


So, after reading some of your replies, I decided to install resolve on another windows machine to test. When I opened the project on the new machine I got the same results as Charles did. Only the Panasonic and GoPro footage have a much smaller gap at the front end. When I just play these clips back with VLC Player I believe I can hear that small gap in those two files so that may just be the way they were recorded or some small nuance with the cameras they came from.

All of this would seemingly point to an issue on my production machine. I find this odd because, as I mentioned before, this only started happening after upgrading to resolve 18. There haven't been any other system/software changes to the machine that I'm aware of. However, at least this gives me a point to start troubleshooting from. Thank you for all of your help.

Hi all,

I tried the same project on my desktop computer (Windows 11 Professional, 22H2, insider build 22622.450) running the studio version 18.0.1 and my laptop (stuck to Windows 10 because of obsolete hardware) running the free version 18.0.1
Both systems are respectively running their latest update.

The 20 seconds waveform gap only appears on the Windows 11 system.
The laptop is dead slow and litterally unusable, but shows the complete audio waveforms.

All files tested are coming straight from Gopro Hero 10, 4K 60fps, H265 format.

Regards,

Dan

Hi all,

I tried the same project on my desktop computer (Windows 11 Professional, 22H2, insider build 22622.450) running the studio version 18.0.1 and my laptop (stuck to Windows 10 because of obsolete hardware) running the free version 18.0.1
Both systems are respectively running their latest update.

The 20 seconds waveform gap only appears on the Windows 11 system.
The laptop is dead slow and litterally unusable, but shows the complete audio waveforms.

All files tested are coming straight from Gopro Hero 10, 4K 60fps, H265 format.

Regards,

Dan

Yes, the machine I was having the issue on was running Windows 11 Pro 22h2 release preview. The issue wasn't present on my other machine running the current production version of Windows 11. The issue must lie in some changes Microsoft made in the latest Windows 11 builds

I faced the same problem after the Windows 11 22H2 update and opened the following thread
viewtopic.php?f=21&t=166258

Hi all,

It starts really looking strange...
I started a new project this morning, with clips taken yesterday with a GoPro @4K-50fps

Some audio waveforms still have the 20 secs gap, but some only show a 2 seconds gap.
All clips have been taken yesterday with the exact same settings.

What changes since my previous post is that Windows 11 has received a new update a few days ago (build 22622.586)

After verification, all previous projects still have the 20 seconds waveform gaps.

Dan

using "Compound clip" for audio will fix the problem. but it's a temporary solution.
I have the same problem, (windows 11, resolve studio 18.0.3, Canon R5 footage+rode wireless go).

the last entry on here is august. it is now september and i just updated my windows 10 to windows 11 and then to the most recent build and now my davinci resolve is doing the same thing. it doesnt want to play the first 2 or 3 seconds of audio and when i try to render it does the same thing...

what is the fix? should i downgrade back to windows 10?

the last entry on here is august. it is now september and i just updated my windows 10 to windows 11 and then to the most recent build and now my davinci resolve is doing the same thing. it doesnt want to play the first 2 or 3 seconds of audio and when i try to render it does the same thing...

what is the fix? should i downgrade back to windows 10?

As far as we currently know there is no fix. There is a compound clip workaround posted above. Reverting back to windows 10 while you wait for a fix is also an option if that suits you. There doesn't seem to be a lot of interest in this issue so I'm not sure a fix will come anytime soon. It's also unclear if the fix needs to happen on the Windows side or the Davinci Resolve side. Regards.

so funny thing... i decided to go back to windows 10 but was unable to. it did however, removed the latest windows 11 service update to 22H2 and now davinci resolve is working again (when it comes to the sound issue). the rendering is still atrocious though.

on another note. DR release 18.0.4 and i updated to it. the notes to suggest anything except bug fixes. im hesitant to update windows again though so im not sure if anyone else updated DR with the windows 22H2 and can tell us if the audio and rendering issues are fixed.

thanks for replying though!

I ended up just converting my audio files to another format (wav, or mp3 both seem to work). After converting, the gaps at the beginning of waveforms were fixed.