[Libav-user] Using libav Libraries with LGPL license

drwho drwho at infidigm.net
Mon Jan 30 15:28:09 EET 2023

Have you read through the License Compliance Checklist?  Read it 
carefully.  There is a very significant difference between GPL and LGPL 
for non GPL source code applications. See point #1.


I am not a lawyer; below is my opinion....

On 2023-01-30 00:53, 김기돈 [메타버스엔터테인먼트] wrote:
> Hi,
> I'm planning to create a simple video editor (video cutting and 
> merging) and found the libav libraries useful.
> Since libav is under the LGPL license, I have some questions about 
> this license's usage.
> Q1) When we distribute our program, do we have to upload the whole 
> libav source code that I used for this project and the object files of 
> the project?
#3 - Distribute the source code of FFmpeg, no matter if you modified it 
or not.
> Q1-1) If Q1 is true, then if we have the dlls for libav, we don't have 
> to upload the object files of our project?
You do _not_ need to distribute the object files if linking dynamically.
> Q2) This could be a silly question. One of the open-source projects I 
> used needed to be paid to use their codes. (This was a really rare 
> case for me a long time ago.) Because of this, I was wondering if we 
> have to pay to use libav.

No ( donations are welcome )


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