[FFmpeg-user] avformat_free_context function is not able to free the stuff that was cached by avcodec_encode_video2

[Harald Jordan]

Subject: avformat_free_context function is not able to free the stuff that
was cached by avcodec_encode_video2

 

Hey there!

I am not sure if this should to to the ffmpeg or libavcodec dev mailing
lists, but here is what I learned today:

avcodec_encode_video2 has the ability to cache stuff on its own if neede
(e.g GOP Encoding). Now from my dll application I learned that:


-) avcodec_encode_video2 seems to cache raw (the input buffer) instead of
only the encoded packet->data (I expected else), this can be seen by
checking the growth of memory before and after this function call

-) avformat_free_context(AVFormatContext outputcontext) did not free the
memory that the  avcodec_encode_video2 function allocated all over


The solution was to close and free the outputstream on my own, using below
close_video function.

No, I already checked the void avformat_free_context(AVFormatContext *s)
function, as I see it should be able to free everything just my function
does. 


Now here is the question: Was my expection right that avformat_free_context
should clean all the memory that was chached internally from
avcodec_encode_video2 ?

 

Merry Christmas to all of you!

 

Harry

 

 

 

static void close_video(AVFormatContext *oc, AVStream *st)

{

       //free libavcodec resources

    avcodec_close(st->codec);

       av_free(st); //this was the final solution for the problem of getting
rid of all the stuff that was allocated internally by avcodec_encode_video2

       //free our own buffers

       if(picture){

             av_free(picture->data[0]);

             av_free(picture);

       }

    if (tmp_picture) {

        //av_free(tmp_picture->data[0]);

        av_free(tmp_picture);

    }

    av_free(video_outbuf);

}