Hello,
I have a simple module in our application that encodes a generated raw image
and writes the encoded packets to file. The allocated image size is 1920x1080.
Calls to avcodec_encode_video2 are allocating around 500MB of memory which is
never freed up. I cannot find the source of this leak.
Below I have described the procedure I'm using. Some notes:
1. if avcodec_encode_video2 does not return a got_pkt, I'm not freeing
the packet because it was never allocated. Is that correct?
2. Am I correctly freeing frames with: av_freep and avcodec_free_frame ?
3. Does sws_scale simply takes the srcFrame and copies the
scaled/converted image to the already allocated dstFrame, or is there any
malloc involved internally? If so, I'm not freeing anything after this call.
Thanks and Regards
Reuben
FUNCTION Start
av_register_all()
avformat_alloc_context(..)
avcodec_find_encoder
avformat_new_stream(..)
avcodec_open2(..)
srcFrame = avcodec_alloc_frame(..)
dstFrame = avcodec_alloc_frame(..)
av_image_alloc(srcFrame, ...)
av_image_alloc(dstFrame, ...)
sws_getContext(..)
avio_open(..)
avformat_write_header(..)
End FUNCTION
FUNCTION WriteLoop
while (..)
{
fill srcFrame
av_init_packet(..)
sws_scale(srcFrame, dstFrame, ...)
avcodec_encode_video2(.., dstFrame, got_pkt)
if (got_pkt) WritePacket()
}
End FUNCTION
FUNCTION WritePacket
av_interleaved_write_frame(..)
av_free_packet(..)
End FUNCTION
FUNCTION Stop
got_pkt = 1
while (got_pkt)
{
avcodec_encode_video2(.., NULL, got_pkt)
if (got_pkt) WritePacket()
}
av_write_trailer(..)
av_freep(&srcFrame->data[0]);
avcodec_free_frame(&srcFrame);
av_freep(&dstFrame->data[0]);
avcodec_free_frame(&dstFrame);
//free the streams.
av_freep(streams[i]->codec);
av_freep(streams[i]);
avio_close(..);
av_free(avFormatContext);
sws_freeContext(..);
End FUNCTION
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