On 24/09/2017 15:55, Luca Barbato wrote:
Should improve the performance on multiple transcoding from a single
source.
---
  libavcodec/qsv.c     | 2 ++
  libavfilter/qsvvpp.c | 1 +
  2 files changed, 3 insertions(+)

diff --git a/libavcodec/qsv.c b/libavcodec/qsv.c
index 56bfbb33d2..925dfaa4cc 100644
--- a/libavcodec/qsv.c
+++ b/libavcodec/qsv.c
@@ -594,6 +594,8 @@ int ff_qsv_init_session_device(AVCodecContext *avctx, 
mfxSession *psession,
                                        "Error setting a HW handle");
      }
+ MFXJoinSession(parent_session, session);
+
      ret = qsv_load_plugins(session, load_plugins, avctx);
      if (ret < 0) {
          av_log(avctx, AV_LOG_ERROR, "Error loading plugins\n");
diff --git a/libavfilter/qsvvpp.c b/libavfilter/qsvvpp.c
index c70050822c..6a38e9f0f9 100644
--- a/libavfilter/qsvvpp.c
+++ b/libavfilter/qsvvpp.c
@@ -516,6 +516,7 @@ static int init_vpp_session(AVFilterContext *avctx, 
QSVVPPContext *s)
          if (ret != MFX_ERR_NONE)
              return AVERROR_UNKNOWN;
      }
+    MFXJoinSession(device_hwctx->session, s->session);
if (IS_OPAQUE_MEMORY(s->in_mem_mode) || IS_OPAQUE_MEMORY(s->out_mem_mode)) {
          s->opaque_alloc.In.Surfaces   = s->surface_ptrs_in;


As Chao mentioned it fails to join the session, but the error reported is:

[h264_qsv @ 0x3250fa0] Error joining session: invalid handle (-6)

lu

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