Participant

Answered

Need help with playback/editing issues with a multi audio track video im working on.

Forum|Forum|6 years ago
April 12, 2019
5 replies
3458 views

Hey guys new to the forum and was hoping i could get some help or ideas on how to fix an issue im having.

Ive tried to include as much detail as possible to help you guys help me, but basically my issue is i cant edit a large video file because the playback is far too laggy and the audio drops out almost entirely after a certain point.

Fairly new to adobe premiere pro, recently started watching skill share vids and have been wanting to work on a video i had started working on in sony vegas.

I dont seem to be having issues with smaller file size projects. Ive had no issues working on stuff from the skill share course ive been taking, instagram clips i put together, and some yt end cards ive made.

Finally made some time to start working on this project, i recorded this video via OBS. When i import the video into premiere pro i cant get the playback to run smoothly and im having audio desync and dropping issues.

The video is 24.7gb in size, 1080p, 60fps, its about 5.1 hours long, it has 5 audio tracks, and it may have been recorded with a variable frame rate instead of constant frame rate. I also have no issues working with this file over in sony vegas. I have a pretty decent computer so it shouldnt be the problem (i74930k @ 3.4ghz, 32gb ddr3 ram @ 2133mhz, gtx 1080).

Basically i find that i can watch the videos playback and hear my audio for the first about 5 mins of the video. Then the audio drops out completely and i cant hear it anywhere else except in the beginning of the video. I have managed to get halfway through the entire recording and get audio working somehow but then its not properly synced. When trying to jump around the timeline i find that the video takes several seconds to start playback and then it plays at what feels like an inconsistent 5-13 fps.

Ive found that i can edit the video only if i have it exported from sony vegas with only 1 audio track. The video is still 1080p but instead of 60 fps its 59.94 fps. It still feels pretty sluggish when jumping around the time line sometimes, but the audio works. My current workaround is going to be to edit that video instead of the original video and import the extracted audio tracks back in manually. I can't however deal with this workaround for very long as i do these kinds of recordings/streams several days out of the week and am trying to get to the point where i can quickly make edits out of them to upload to youtube.

Any ideas, help, or anything would be extremely appreciated. ❤️

This topic has been closed for replies.

Correct answer Sparktite

Figured id reply with an update and mark as answer since no one else has any solutions.

While these arent exactly solutions its the best ive found trying to resolve my stuff.
Marking in/out and rendering from in to out via the sequence drop down option next to file/edit/clip fixes the really laggy choppy playback. It also renders the audio so i dont get any more audio drops. This however does not fix the audio delay issues.

The work around i came up with for the audio delay issue was to download an ffmpeg plugin for audacity. Can be found here https://lame.buanzo.org/#lamewindl its the dl link labeled "ffmpeg 2.2.2 binary for windows compatible with audacity 2.0.6 and later" Basically installing the latest audacity followed by that ffmpeg plugin allows me to drag drop my original obs recording mp4 file into audacity. You will get a prompt on which audio track to download. Pick the ones that work for you, click export and export it as a .wav. Import the .wav(s) into adobe premier and it should lay down perfectly over the video unlike the tracks imported along with the video. If it doesnt sync up you'll have to do it manually as it worked for me luckily.

Anyways thanks everybody for help, and gl to anyone out there on google

PrimeEdits

Inspiring

I was having similar issue with premiere, but o managed to find a work around, what i did is i rendered every audio track separately into its own individual .mp3 file, and i disabled all the audio tracks in the original video, that way i used the rendered audio instead of the raw video audio.

S

SparktiteAuthorCorrect answer

Participant

Figured id reply with an update and mark as answer since no one else has any solutions.

While these arent exactly solutions its the best ive found trying to resolve my stuff.
Marking in/out and rendering from in to out via the sequence drop down option next to file/edit/clip fixes the really laggy choppy playback. It also renders the audio so i dont get any more audio drops. This however does not fix the audio delay issues.

The work around i came up with for the audio delay issue was to download an ffmpeg plugin for audacity. Can be found here https://lame.buanzo.org/#lamewindl its the dl link labeled "ffmpeg 2.2.2 binary for windows compatible with audacity 2.0.6 and later" Basically installing the latest audacity followed by that ffmpeg plugin allows me to drag drop my original obs recording mp4 file into audacity. You will get a prompt on which audio track to download. Pick the ones that work for you, click export and export it as a .wav. Import the .wav(s) into adobe premier and it should lay down perfectly over the video unlike the tracks imported along with the video. If it doesnt sync up you'll have to do it manually as it worked for me luckily.

Anyways thanks everybody for help, and gl to anyone out there on google

C

Carlos Ziade

Community Expert

here's a snap from the link i shared:

How to address the audio-video sync issue?

Playing VFR media in Premiere Pro may result in the audio being out of sync with its corresponding video frame. To address this audio drift, Premiere Pro has a new feature called Preserve Audio Sync.

To access this, open a VFR clip in the Source Monitor from the Project panel and switch to the Effect Controls panel.

You can toggle between the following options under MPEG Source settings:

Preserve Audio Sync - This option decodes the source so that the audio and video are in sync. To accomplish this sync, the decoder adds or drops video frames. This may result in less smooth motion in the video. This is the default for all VFR sources with audio.
Smooth Video Motion - This option decodes all the available frames in the source and does not make any effort to maintain AV sync. This results in smoother motion in the video. You can choose this setting if you are doing motion graphics work and care more about getting all the available video frames. If Premiere Pro does not detect any audio, this option becomes the default option.

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SparktiteAuthor

Participant

Yeah i found that before. No luck tho its already doing preserve audio sync to no effect thanks tho.
Im not 100% sure its VFR but from what i was reading it sounds like theres a good chance that it is and i have no idea how to actually go in and check if the video actually is or not.

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SparktiteAuthor

Participant

Is there no option to edit the OP?
I just wanted to update that i no longer have laggy playback as long as i mark in/out and render in to out which is not a fix or solution at all but better than nothing. I still for whatever reason have audio that is not synced to the video at all so im wondering whats causing that as well now.

C

Carlos Ziade

Community Expert

I missed the part when you mentioned they were shot on variable frame rate, so please refer here:

FAQ: How to work with Variable Frame Rate (VFR) media in Premiere Pro?

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Carlos Ziade

Community Expert

There are always trouble with Open Broadcast OBS files which are not much compatible

with Premiere Pro, so my suggestion is to throw those files to Premiere Pro timeline and

export them to something like Quick Time GoPro Cineform which would preserve

their quality and playback smoothly. You can also export to H.264 but Cineform prooved to be smoother.

To export multichannel audio as well, follow this please:

https://www.premiumbeat.com/blog/export-multiple-audio-tracks-premiere-pro/

Hope this helps

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SparktiteAuthor

Participant

So your saying basically my only way to edit these files is to go about exporting them like i am with vegas to then work on them in premiere? Is there no way to get premiere to work with em? Is it a VFR thing or what specifically? I cant imagine premiere pro cant handle something that vegas has no issues with like an obs recording.
Are u saying i should also be worried about how premiere exports the footage? I assumed it was a playback issue not a problem with premiere entirely.

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