Le tridi 13 floréal, an CCXXI, Radu Robotin a écrit : > I'm using ffmpeg with libavcodec and libavfilters for a custom project. > I've recently upgraded to the latest version available from git and noticed > that my previous code has stopped working. I'm processing several streams, > each in his own thread in the following way: > > next sample is taken from the stream, decoded and then inserted in the > buffer source of the filtergraph using av_buffersrc_add_frame() > a frame is extracted from the buffer sink of the filtergraph using > av_buffersink_get_frame() > the filtered frame is copied in a buffer for further processing > > before upgrading to the latest version of ffmpeg I've been using ffmpeg 1.2 > and everything worked flawlessly. The filtered buffer was pulled from the > filtergraph using the av_buffersink_get_buffer_ref().
The change from buffer ref to frames was accompanied with a change in the lifetime of the frames. What you describe looks like a problem with that, but without seeing the code it is impossible to tell for sure. > The problem I'm encountering: at the first pass everything works fine, > however when I call the processing function for the second time (for > processing the next frame), it coredumps when I call > av_buffersink_get_frame() with the message " corrupted double-linked list ". > I tried further investigating the problem and have several > frames processed during the same call of this function: everything works > until the second call, then it coredumps at the same point. The "corrupted double-linked list" message seems to indicate corrupted memory: either you write to an invalid location, or you write to a location that was previously freed, but you do not get the error immediately. I suggest you use valgrind to get an error at the exact time of the problem. > To me it seems that something changes the structure of the filtergraph > between the calls to the processing function. I am rather sure that the structure of the filter graph is not supposed to change after it has been configured. Regards, -- Nicolas George
signature.asc
Description: Digital signature
_______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
