When I export a .mkv clip into lightworks there is no sound, just video.

I am so new to lightworks and i am trash at it.

Help would be good

Welcome to the forum.



MKV isn't fully supported in Lightworks, convert your video to MP4 by reexporting from OBS, if that the source or use Handbrake to convert your video. Use the settings here for the latter: www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=66072&Itemid=81

I have converted my videos to mp4 but they still didn't have any sound

Also I am really bad at lightworks... Like REALLY bad so the thing I am missing is probably something obvious if that helps

Could you post a Mediainfo report of the original MKV recording, please. Here you'll find directions:

www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=66072&Itemid=81#66072

Please tell also how it has been created.

Do you get sound on other videos in Lightworks?

Please follow the directions in this sticky, so that users can see the technical details of your video: www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=66072&Itemid=81

Wait I fixed it sorry

lol thanks for the help


: D

Hi Deane. How you have solve the problem? The same I have with avi files from navigator. No sound. What I am doing wrong?

I have sound from other files like from my phone mp4, but avi from navigator PCM 16-bit mono 32 kHz doesn't have any sound

Welcome to the forum.

Please could you follow the directions in this sticky, so that users can see the technical details of your media: www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=66072&Itemid=81

Smthng like that:
General
Complete name : C:\Navigator PapaGo C\2020-07-17 50 Point\1-03.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 1.37 GiB
Duration : 10 min 2 s
Overall bit rate : 19.6 Mb/s

Video
ID : 0
Format : JPEG
Codec ID : MJPG
Duration : 10 min 2 s
Bit rate : 18.6 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 24.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.373
Stream size : 1.30 GiB (95%)

Audio
ID : 1
Format : PCM
Format settings : Little / Signed
Codec ID : 1
Duration : 10 min 2 s
Bit rate mode : Constant
Bit rate : 512 kb/s
Channel(s) : 1 channel
Sampling rate : 32.0 kHz
Bit depth : 16 bits
Stream size : 36.7 MiB (3%)
Alignment : Aligned on interleaves
Interleave, duration : 1000 ms (24.00 video frames)

Hello,

Thank you for the mediainfo.

From metadata, I don't see any obvious reason why the sound of this video shouldn't play. However, it could be that your webcam type of device creates a stream not compatible with the Lightworks demuxer/decoder.

Remuxing AVI to MOV with FFmpeg might be sufficient. It's very fast and preserves the original quality, because it doesn't re-encode:

If that doesn't help, remuxing video while re-encoding audio would be the next step to try (also very fast):

If you are not familiar with FFmpeg or if the above doesn't create a valid result, re-encoding with Handbrake should fix it (not so fast). Here you'll find suitable settings:

www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=166802&Itemid=81#209009

Thank you, Hugly. Looks like I did it. I can do it only for mov files? I tried for mp4 but did not get any result. Another question: how can I use it for batch operation like for whole folder with dozens of files?

It doesn't work for MP4, because the MP4 standard doesn't support PCM audio (officially), but I can imagine that it will work when remuxing from AVI to AVI, because I suspect the issue is caused by the muxer of your camera creating a format which isn't compliant to the Lighwtorks demuxer.

I prefer remuxing, if it works, because it's fast and doesn't re-encode. However, it's mandatory to test for valid results in any particular case. That's because, beside of compatibility of track layout and stream format, there are too many differences in the results of real world muxers/demuxers.

You can include the command line in a batch file to process all files in a folder - with the second command line shared above, e.g. a bash script for Linux and OSX:

Oops, I don't know why I silently assumed when answering above that you run an UX-type of operating system. The shared mediainfo shows the path notation of a Windows system.

Here's a sample of a batch file in the syntax of cmd.exe for Windows. It's designed to be invoked via drag & drop and creates a sub folder with the processed files including logs.


To work properly, it needs the PATH variable of your system to be set to include the path to 'ffmpeg.exe'.

As a matter of interest which version of the command line has worked for you?

Thank you. I'll try.