From: Steven Liu <l...@chinaffmpeg.org>
because it will cannot get ctx->hwctx->internal value when
get ctx->hwctx->internal->cuda_dl value. so should check if internal is
null.
before patch:
liuqi@chinaffmpeg:~/multimedia/build$ ./ffmpeg_g -hwaccel_device 0 -hwaccel
cuda -pix_fmt nv12 -s 1920x1080 -i output.yuv -hwaccel_device 0 -hwaccel cuda
-pix_fmt nv12 -s 800x480 -i output_small.yuv -filter_complex
"[0:v]hwupload_cuda[a];[1:v]hwupload_cuda[b];[a][b]overlay_cuda=x=0:y=0[o];[o]hwdownload[o1]"
-map "[o1]" -pix_fmt nv12 -y -t 1 xxx.yuv
ffmpeg version N-101879-g13bf797ced Copyright (c) 2000-2021 the FFmpeg
developers
built with gcc 9 (Ubuntu 9.3.0-17ubuntu1~20.04)
configuration: --cc='ccache cc' --enable-libx264 --enable-libx265
--enable-libopus --enable-libwebp --enable-libvpx --enable-ffnvcodec
--enable-vaapi --enable-opengl --enable-nonfree --enable-gpl
--enable-libfdk-aac --enable-libfreetype --enable-cuda --enable-libnpp
--enable-cuda-nvcc --enable-cuda-llvm
libavutil 56. 72.100 / 56. 72.100
libavcodec 58.135.100 / 58.135.100
libavformat 58. 78.100 / 58. 78.100
libavdevice 58. 14.100 / 58. 14.100
libavfilter 7.111.100 / 7.111.100
libswscale 5. 10.100 / 5. 10.100
libswresample 3. 10.100 / 3. 10.100
libpostproc 55. 10.100 / 55. 10.100
[rawvideo @ 0x5584b7a9e4c0] Estimating duration from bitrate, this may be
inaccurate
Input #0, rawvideo, from 'output.yuv':
Duration: 00:01:54.64, start: 0.000000, bitrate: 622080 kb/s
Stream #0:0: Video: rawvideo (NV12 / 0x3231564E), nv12, 1920x1080, 622080
kb/s, 25 tbr, 25 tbn, 25 tbc
[rawvideo @ 0x5584b7aa30c0] Estimating duration from bitrate, this may be
inaccurate
Input #1, rawvideo, from 'output_small.yuv':
Duration: 00:04:07.16, start: 0.000000, bitrate: 115200 kb/s
Stream #1:0: Video: rawvideo (NV12 / 0x3231564E), nv12, 800x480, 115200 kb/s,
25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 (rawvideo) -> hwupload_cuda
Stream #1:0 (rawvideo) -> hwupload_cuda
hwdownload -> Stream #0:0 (rawvideo)
Press [q] to stop, [?] for help
Output #0, rawvideo, to 'xxx.yuv':
Metadata:
encoder : Lavf58.78.100
Stream #0:0: Video: rawvideo (NV12 / 0x3231564E), nv12(progressive),
1920x1080, q=2-31, 622080 kb/s, 25 fps, 25 tbn (default)
Metadata:
encoder : Lavc58.135.100 rawvideo
frame= 25 fps=0.0 q=-0.0 Lsize= 75938kB time=00:00:01.00
bitrate=622080.0kbits/s speed=6.11x
video:75938kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
Segmentation fault (core dumped)
This patch can fix the Segmentation fault problem.
Signed-off-by: Steven Liu <l...@chinaffmpeg.org>
---
libavfilter/vf_overlay_cuda.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/vf_overlay_cuda.c b/libavfilter/vf_overlay_cuda.c
index f6ee43e929..4d8617475f 100644
--- a/libavfilter/vf_overlay_cuda.c
+++ b/libavfilter/vf_overlay_cuda.c
@@ -249,7 +249,7 @@ static av_cold void overlay_cuda_uninit(AVFilterContext
*avctx)
ff_framesync_uninit(&ctx->fs);
- if (ctx->hwctx && ctx->cu_module) {
+ if (ctx->hwctx && ctx->cu_module && ctx->hwctx->internal) {
CUcontext dummy;
CudaFunctions *cu = ctx->hwctx->internal->cuda_dl;
CHECK_CU(cu->cuCtxPushCurrent(ctx->cu_ctx));
--
2.25.0
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