From: Subrata Goswami
Sent: 20 February 2019 22:08
To: [email protected]
Subject: [Libav-user] Strange memory leak and fragmentation
Have couple of simple questions on the following few lines of code.
AVFrame *frame = av_frame_alloc();
AVPacket packet;
while(av_read_frame(ictx, &packet)>=0) {
if(packet.stream_index==video_stream) {
avcodec_send_packet(octx, &packet);
if(avcodec_receive_frame(octx, frame)==0) {
}
}
}
1. The above leaks memory, but the following piece of code does not.
AVFrame *frame = av_frame_alloc();
AVPacket *packet=av_packet_alloc();
while(av_read_frame(ictx, packet)>=0) {
if(packet->stream_index==video_stream) {
avcodec_send_packet(octx, packet);
if(avcodec_receive_frame(octx, frame)==0) {
}
}
av_packet_free(&packet);
packet=av_packet_alloc();
}
2. Is there any way to reuse the packet structure, else rapid free and alloc
probably leads to memory fragmentation.
Would appreciate any insight, comment, advice. Thanks .
You need to use av_packet_unref(&packet); so that the library can free the
packet struct after you are done with it.
https://ffmpeg.org/doxygen/4.0/group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2
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