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ffmpeg: switch to scale_cuda for CUDA 13 support #449

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ffmpeg: switch to scale_cuda for CUDA 13 support #449

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a70333b
ffmpeg: move back to scale_cuda from scale_npp
iameli Jan 23, 2024
14374df
install_ffmpeg.sh: drop libnpp, allow nvcc gencode override
Strykar May 12, 2026
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15 changes: 2 additions & 13 deletions ffmpeg/ffmpeg.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,6 @@ import (
"os"
"path"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
Expand Down Expand Up @@ -1115,21 +1114,11 @@ func ffmpegStrEscape(origStr string) string {
}

func hwScale() string {
if runtime.GOOS == "windows" {
// we don't build windows binaries with CUDA SDK, so need to use scale_cuda instead of scale_npp
return "scale_cuda"
} else {
return "scale_npp"
}
return "scale_cuda"
}

func hwScaleAlgo() string {
if runtime.GOOS == "windows" {
// we don't build windows binaries with CUDA SDK, so need to use the default scale algorithm
return ""
} else {
return "super"
}
return ""
}

func FfmpegSetLogLevel(level int) {
Expand Down
5 changes: 4 additions & 1 deletion install_ffmpeg.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -197,7 +197,9 @@ elif [[ "$GOOS" == "windows" ]]; then
EXTRA_FFMPEG_FLAGS="$EXTRA_FFMPEG_FLAGS --enable-cuda --enable-cuda-llvm --enable-cuvid --enable-nvenc --enable-decoder=h264_cuvid,hevc_cuvid,vp8_cuvid,vp9_cuvid --enable-filter=scale_cuda,signature_cuda,hwupload_cuda --enable-encoder=h264_nvenc,hevc_nvenc"
elif [[ -e "/usr/local/cuda/lib64" ]]; then
echo "CUDA SDK detected, building with GPU support"
EXTRA_FFMPEG_FLAGS="$EXTRA_FFMPEG_FLAGS --enable-nonfree --enable-cuda-nvcc --enable-libnpp --enable-cuda --enable-cuda-llvm --enable-cuvid --enable-nvenc --enable-decoder=h264_cuvid,hevc_cuvid,vp8_cuvid,vp9_cuvid --enable-filter=scale_npp,signature_cuda,hwupload_cuda --enable-encoder=h264_nvenc,hevc_nvenc"
# libnpp is restructured/dropped in CUDA 13 and is otherwise nonfree;
# scale_cuda replaces scale_npp without needing it.
EXTRA_FFMPEG_FLAGS="$EXTRA_FFMPEG_FLAGS --enable-nonfree --enable-cuda-nvcc --enable-cuda --enable-cuda-llvm --enable-cuvid --enable-nvenc --enable-decoder=h264_cuvid,hevc_cuvid,vp8_cuvid,vp9_cuvid --enable-filter=scale_cuda,signature_cuda,hwupload_cuda --enable-encoder=h264_nvenc,hevc_nvenc"
else
echo "No CUDA SDK detected, building without GPU support"
fi
Expand Down Expand Up @@ -231,6 +233,7 @@ if [[ ! -e "$ROOT/ffmpeg/libavcodec/libavcodec.a" ]]; then
--extra-cflags="${EXTRA_CFLAGS} -I${ROOT}/compiled/include -I/usr/local/cuda/include" \
--extra-ldflags="${EXTRA_FFMPEG_LDFLAGS} -L${ROOT}/compiled/lib -L/usr/local/cuda/lib64" \
--prefix="$ROOT/compiled" \
--nvccflags="-gencode arch=${NVCC_GENCODE_ARCH:-compute_60},code=${NVCC_GENCODE_SM:-sm_60} -O2 -std=c++11 -m64 -ptx" \
$EXTRA_FFMPEG_FLAGS \
$DEV_FFMPEG_FLAGS || (tail -100 ${ROOT}/ffmpeg/ffbuild/config.log && exit 1)
# If configure fails, then print the last 100 log lines for debugging and exit.
Expand Down