[FFmpeg-user] ffmpeg 4.0.2 and above missing 'ffio_open_dyn_packet_buf' from avformat.lib & avformat.dll

Dinesh Gupta dinesh.gupta01 at gmail.com
Tue Dec 11 18:08:44 EET 2018

Hi Eugne,

Please explain bit more. How can I achieve that?

When same thing Compiled in Ubuntu 16.04 at that time their were no such
issue. But when compiled with wingw32 on window machine functions is

Mentioned functions is available in the latest libav library.

I am trying to compile 'gaminganywhere.org' code for streaming game engine
with ffmpeg 4.x to use hardware encoding with CUDA OR NVENC etc.

Please guide me.

Dinesh Gupta

On Tue, Dec 11, 2018, 4:37 PM Carl Eugen Hoyos <ceffmpeg at gmail.com wrote:

> 2018-12-11 9:19 GMT+01:00, Dinesh Gupta <dinesh.gupta01 at gmail.com>:
> > While building 'ffmpeg' 4.0.2 and above, missing function
> > 'ffio_open_dyn_packet_buf'. Due to this I am unable to compile my
> project.
> > I spend my whole week to find the solution but didn't get success. When
> > searching this function in code than it is available on source code.But
> > when build from sorce code this function is missing.
> This is intentional, the function is meant for internal use in libavformat,
> not for use outside of the library.
> Change the name of the function so that it starts with "av_" if you want
> it exported but remember that you have to do this for every new version
> of FFmpeg and note that we may change (or remove) the function
> without notice.
> (An alternative is to edit libavformat/libavformat.v)
> Carl Eugen
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