A large initial_pool_size leads to redundant GPU memory allocations compared with MSDK.
For some special cases which needs larger GPU memory like look_ahead, add -extra_hw_frames to allocate more. CMD: ffmpeg -hwaccel qsv -extra_hw_frames 50 -c:v hevc_qsv -i hevc.h265 -c:v h264_qsv -look_ahead 1 -look_ahead_depth 50 -y output.h264 Fix #7943. Reported-by: Eero T Signed-off-by: Linjie Fu <linjie...@intel.com> --- fftools/ffmpeg_qsv.c | 2 +- libavcodec/qsvdec.c | 5 ++++- libavcodec/qsvenc_h264.c | 4 ++-- 3 files changed, 7 insertions(+), 4 deletions(-) diff --git a/fftools/ffmpeg_qsv.c b/fftools/ffmpeg_qsv.c index 9c4285b..5039a5a 100644 --- a/fftools/ffmpeg_qsv.c +++ b/fftools/ffmpeg_qsv.c @@ -93,7 +93,7 @@ int qsv_init(AVCodecContext *s) frames_ctx->height = FFALIGN(s->coded_height, 32); frames_ctx->format = AV_PIX_FMT_QSV; frames_ctx->sw_format = s->sw_pix_fmt; - frames_ctx->initial_pool_size = 64 + s->extra_hw_frames; + frames_ctx->initial_pool_size = 24 + s->extra_hw_frames; frames_hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET; ret = av_hwframe_ctx_init(ist->hw_frames_ctx); diff --git a/libavcodec/qsvdec.c b/libavcodec/qsvdec.c index 0d34021..407e6de 100644 --- a/libavcodec/qsvdec.c +++ b/libavcodec/qsvdec.c @@ -300,8 +300,11 @@ static int alloc_frame(AVCodecContext *avctx, QSVContext *q, QSVFrame *frame) else ret = ff_get_buffer(avctx, frame->frame, AV_GET_BUFFER_FLAG_REF); - if (ret < 0) + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "More memory in need, " + "try -extra_hw_frames to allocate more.\n"); return ret; + } if (frame->frame->format == AV_PIX_FMT_QSV) { frame->surface = *(mfxFrameSurface1*)frame->frame->data[3]; diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c index 27f36b9..4e8035b 100644 --- a/libavcodec/qsvenc_h264.c +++ b/libavcodec/qsvenc_h264.c @@ -112,8 +112,8 @@ static const AVOption options[] = { { "max_dec_frame_buffering", "Maximum number of frames buffered in the DPB", OFFSET(qsv.max_dec_frame_buffering), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, UINT16_MAX, VE }, #if QSV_HAVE_LA - { "look_ahead", "Use VBR algorithm with look ahead", OFFSET(qsv.look_ahead), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, - { "look_ahead_depth", "Depth of look ahead in number frames", OFFSET(qsv.look_ahead_depth), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 100, VE }, + { "look_ahead", "Use VBR algorithm with look ahead, extra_hw_frames is needed", OFFSET(qsv.look_ahead), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, + { "look_ahead_depth", "Depth of look ahead in number frames, extra_hw_frames is needed", OFFSET(qsv.look_ahead_depth), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 100, VE }, #endif #if QSV_HAVE_LA_DS { "look_ahead_downsampling", "Downscaling factor for the frames saved for the lookahead analysis", OFFSET(qsv.look_ahead_downsampling), -- 2.7.4 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".