Re: [Boost-users] [Interprocess] Sharing FFMPEG Datatypes

Subject: Re: [Boost-users] [Interprocess] Sharing FFMPEG Datatypes
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2016-06-25 16:53:09

On 24/06/2016 4:14, Loren Garavaglia wrote:
> Hi All,
>
> I'm trying to figure out if it's possible using Boost to share FFMPEG
> data between 2 processes. What I'm trying to do is have one process read
> from a video stream and place the received packets in a buffer. The
> other process then reads from the buffer, decodes the packet, and does
> some analysis on the image. Unfortunately, due to some constraints I
> cannot take a multi-threaded approach to this problem.
>
> My data that I would like to share is as follows:
>
>     struct FFMPEGData {
> AVFormatContext  *pFormatCtx;
> AVCodecContext    *pCodecCtx;
> AVCodec  *pCodec;
>   AVFrame  *pFrame, dst;
>   AVPacket  *packet;
>   AVPacket* pack = new AVPacket[packetNum];
>
> struct SwsContext  *convert_ctx;
>     };
>

You can't place in shared memory raw pointers or any other handle to 
data that belongs to a process. So you need to use your own data structures.

Best

Ion