I think I have found the same memory leak and it's even more basic. The
following code will leak memory when using AV_HWDEVICE_TYPE_QSV , but not when
using AV_HWDEVICE_TYPE_CUDA
while (true)
{
AVBufferRef* hw_device_ctx;
av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV, NULL, NULL,
0);
av_buffer_unref(&hw_device_ctx);
}
Mark Samuelson
From: Libav-user <[email protected]> On Behalf Of karim abd
Sent: Saturday, June 10, 2023 7:30 AM
To: [email protected]
Subject: [Libav-user] Memory doesn't decrease after freeing a derived device
context of type AV_HWDEVICE_TYPE_QSV
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Hi
I was able to encode ID3D11Texture2D successfully using a derived device
context of type V_HWDEVICE_TYPE_QSV and its hardware frames context but when I
try to free them
the memory does not decrease. I am not very sure if I missed something to free
or it is a bug. Here is a small code to reproduce the problem.
I am using windows 10, visual studio 2022 and ffmpeg 6.0.
thx in advance
#include <iostream>
#include <d3d11.h>
extern "C"
{
#include <libavutil/opt.h>
#include <libavcodec/avcodec.h>
#include <libavutil/hwcontext_d3d11va.h>
#include <libavutil/hwcontext_qsv.h>
#include <libavutil/hwcontext.h>
}
int main()
{
while (true)
{
AVFrame* frame = av_frame_alloc();
const AVCodec* codec =
avcodec_find_encoder_by_name("h264_qsv");
AVCodecContext* encoderContext =
avcodec_alloc_context3(codec);
encoderContext->width = 1920;
encoderContext->height = 1080;
encoderContext->time_base.den = 120;
encoderContext->time_base.num = 1;
encoderContext->framerate.den = 1;
encoderContext->framerate.num = 120;
encoderContext->max_b_frames = 0;
encoderContext->thread_count = 1;
encoderContext->gop_size = 10;
encoderContext->sw_pix_fmt = AV_PIX_FMT_NV12;
encoderContext->pix_fmt = AV_PIX_FMT_QSV;
av_opt_set(encoderContext->priv_data,
"profile", "baseline", 0);
av_opt_set(encoderContext->priv_data, "preset",
"veryfast", 0);
av_opt_set(encoderContext->priv_data,
"async_depth", "1", 0);
av_opt_set(encoderContext, "b", "15M", 0);
av_opt_set(encoderContext, "maxrate", "15M", 0);
av_opt_set(encoderContext, "bufsize", "15M", 0);
AVBufferRef* hardwareDeviceContext;
int err =
av_hwdevice_ctx_create(&(hardwareDeviceContext), AV_HWDEVICE_TYPE_D3D11VA,
"hw", nullptr,
0);
AVHWDeviceContext* deviceContext =
(AVHWDeviceContext*)hardwareDeviceContext->data;
AVD3D11VADeviceContext* ctx =
(AVD3D11VADeviceContext*)deviceContext->hwctx;
//ctx->device = getD3DDevice();
AVBufferRef* hardwareFrameContext;
hardwareFrameContext =
av_hwframe_ctx_alloc(hardwareDeviceContext);
AVHWFramesContext* frames_ctx =
(AVHWFramesContext*)(hardwareFrameContext->data);
frames_ctx->format = AV_PIX_FMT_D3D11;
frames_ctx->sw_format = AV_PIX_FMT_NV12;
frames_ctx->width = encoderContext->width;
frames_ctx->height = encoderContext->height;
frames_ctx->initial_pool_size = 1;
err = av_hwframe_ctx_init(hardwareFrameContext);
err =
av_hwdevice_ctx_create_derived(&encoderContext->hw_device_ctx,
AV_HWDEVICE_TYPE_QSV, hardwareDeviceContext, 0);
err =
av_hwframe_ctx_create_derived(&encoderContext->hw_frames_ctx, AV_PIX_FMT_QSV,
encoderContext->hw_device_ctx, hardwareFrameContext, 0);
err = avcodec_open2(encoderContext, codec, 0);
av_hwframe_get_buffer(encoderContext->hw_frames_ctx, frame, 0);
av_buffer_unref(&hardwareDeviceContext);
av_buffer_unref(&hardwareFrameContext);
hardwareDeviceContext = nullptr;
hardwareFrameContext = nullptr;
av_buffer_unref(&encoderContext->hw_device_ctx);
encoderContext->hw_device_ctx = nullptr;
av_buffer_unref(&encoderContext->hw_frames_ctx);
encoderContext->hw_frames_ctx = nullptr;
av_frame_unref(frame);
av_frame_free(&frame);
frame = nullptr;
avcodec_close(encoderContext);
avcodec_free_context(&encoderContext);
encoderContext = nullptr;
}
return 0;
}
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