According to the FFmpeg documentation, -hwaccel_device can be used to
select a device for hardware acceleration
Example:
ffmpeg -hwaccel qsv -hwaccel_device /dev/dri/renderD129 -c:v h264_qsv \
-i in.h264 -c:v hevc_qsv out.h265
---
fftools/ffmpeg_qsv.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fftools/ffmpeg_qsv.c b/fftools/ffmpeg_qsv.c
index 960c88b69d..b7e7ab0e53 100644
--- a/fftools/ffmpeg_qsv.c
+++ b/fftools/ffmpeg_qsv.c
@@ -55,6 +55,14 @@ static int qsv_device_init(InputStream *ist)
return err;
}
+#if CONFIG_VAAPI
+ else if (ist->hwaccel_device && !strncmp(ist->hwaccel_device, "/dev/dri/",
9)) {
+ err = av_dict_set(&dict, "child_device", ist->hwaccel_device, 0);
+ if (err < 0)
+ return err;
+ }
+#endif
+
err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV,
ist->hwaccel_device, dict, 0);
if (err < 0) {
--
2.25.1
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