diff --git a/rpcs3/Emu/Cell/Modules/cellVdec.cpp b/rpcs3/Emu/Cell/Modules/cellVdec.cpp
index 49975b632c..2a8f855d6b 100644
--- a/rpcs3/Emu/Cell/Modules/cellVdec.cpp
+++ b/rpcs3/Emu/Cell/Modules/cellVdec.cpp
@@ -780,6 +780,83 @@ static error_code vdecQueryAttr(s32 type, u32 profile, u32 spec_addr /* may be 0
 		break;
 	}
 	case CELL_VDEC_CODEC_TYPE_MPEG4:
+	{
+		cellVdec.warning("cellVdecQueryAttr: MPEG4 (profile=%d)", profile);
+
+		const vm::ptr<CellVdecMpeg4SpecificInfo> sinfo = vm::cast(spec_addr);
+
+		if (sinfo)
+		{
+			if (sinfo->thisSize != sizeof(CellVdecMpeg4SpecificInfo))
+			{
+				return { CELL_VDEC_ERROR_ARG, "Invalid MPEG4 specific info size %d", sinfo->thisSize };
+			}
+		}
+
+		// TODO: sinfo
+
+		const u32 maxDecH = sinfo ? +sinfo->maxDecodedFrameHeight : 0;
+		const u32 maxDecW = sinfo ? +sinfo->maxDecodedFrameWidth : 0;
+
+		switch (profile)
+		{
+		case CELL_VDEC_MPEG4_SP_L1:
+		{
+			if (maxDecW > 176 || maxDecH > 144)
+			{
+				return { CELL_VDEC_ERROR_ARG, "Invalid max decoded frame size %dx%d for profile %d", maxDecH, maxDecW, profile };
+			}
+
+			memSize = new_sdk ? 0x8B78B : 0xBB70B;
+			break;
+		}
+		case CELL_VDEC_MPEG4_SP_L2:
+		case CELL_VDEC_MPEG4_SP_L3:
+		{
+			if (maxDecW > 352 || maxDecH > 288)
+			{
+				return { CELL_VDEC_ERROR_ARG, "Invalid max decoded frame size %dx%d for profile %d", maxDecH, maxDecW, profile };
+			}
+
+			memSize = new_sdk ? 0xEFE0B : 0x11FD8B;
+			break;
+		}
+		case CELL_VDEC_MPEG4_SP_D1_NTSC:
+		{
+			if (maxDecW > 720 || maxDecH > 480)
+			{
+				return { CELL_VDEC_ERROR_ARG, "Invalid max decoded frame size %dx%d for profile %d", maxDecH, maxDecW, profile };
+			}
+
+			memSize = new_sdk ? 0x22DB0B : 0x25DA8B;
+			break;
+		}
+		case CELL_VDEC_MPEG4_SP_VGA:
+		{
+			if (maxDecW > 640 || maxDecH > 480)
+			{
+				return { CELL_VDEC_ERROR_ARG, "Invalid max decoded frame size %dx%d for profile %d", maxDecH, maxDecW, profile };
+			}
+
+			memSize = new_sdk ? 0x1FC00B : 0x22BF8B;
+			break;
+		}
+		case CELL_VDEC_MPEG4_SP_D1_PAL:
+		{
+			if (maxDecW > 720 || maxDecH > 576)
+			{
+				return { CELL_VDEC_ERROR_ARG, "Invalid max decoded frame size %dx%d for profile %d", maxDecH, maxDecW, profile };
+			}
+
+			memSize = new_sdk ? 0x28570B : 0x2B568B;
+			break;
+		}
+		default: return { CELL_VDEC_ERROR_ARG, "Invalid MPEG4 profile %d", profile };
+		}
+
+		decoderVerLower = 0x1080000;
+		break;
+	}
 	case CELL_VDEC_CODEC_TYPE_DIVX:
 	{
 		cellVdec.warning("cellVdecQueryAttr: DivX (profile=%d)", profile);
@@ -822,9 +899,6 @@ static error_code vdecQueryAttr(s32 type, u32 profile, u32 spec_addr /* may be 0
 		{
 		case CELL_VDEC_DIVX_QMOBILE     : memSize = new_sdk ? 0x11B720 : 0x1DEF30; break;
 		case CELL_VDEC_DIVX_MOBILE      : memSize = new_sdk ? 0x19A740 : 0x26DED0; break;
-		case CELL_VDEC_MPEG4_PROFILE_1:
-		case CELL_VDEC_MPEG4_PROFILE_3:
-		case CELL_VDEC_MPEG4_PROFILE_4: // just a guess based on the profile used by singstar before and after update
 		case CELL_VDEC_DIVX_HOME_THEATER: memSize = new_sdk ? 0x386A60 : 0x498060; break;
 		case CELL_VDEC_DIVX_HD_720      : memSize = new_sdk ? 0x692070 : 0x805690; break;
 		case CELL_VDEC_DIVX_HD_1080     : memSize = new_sdk ? 0xD78100 : 0xFC9870; break;
@@ -1527,6 +1601,7 @@ error_code cellVdecGetPicItem(ppu_thread& ppu, u32 handle, vm::pptr<CellVdecPicI
 		avc->reserved[0] = 0;
 		avc->reserved[1] = 0;
 	}
+	// TODO: handle MPEG4 properly
 	else if (vdec->type == CELL_VDEC_CODEC_TYPE_MPEG4 || vdec->type == CELL_VDEC_CODEC_TYPE_DIVX)
 	{
 		const vm::ptr<CellVdecDivxInfo> dvx = picinfo_addr;
diff --git a/rpcs3/Emu/Cell/Modules/cellVdec.h b/rpcs3/Emu/Cell/Modules/cellVdec.h
index c8d6df4ae4..b18530ca33 100644
--- a/rpcs3/Emu/Cell/Modules/cellVdec.h
+++ b/rpcs3/Emu/Cell/Modules/cellVdec.h
@@ -389,9 +389,6 @@ struct CellVdecAvcInfo
 // DIVX Profile
 enum DIVX_level : u8
 {
-	CELL_VDEC_MPEG4_PROFILE_1                = 1, // SingStar Vol.2 / Vol.3
-	CELL_VDEC_MPEG4_PROFILE_3                = 3, // Used for SingStar recordings
-	CELL_VDEC_MPEG4_PROFILE_4                = 4, // SingStar Pop
 	CELL_VDEC_DIVX_QMOBILE                   = 10,
 	CELL_VDEC_DIVX_MOBILE                    = 11,
 	CELL_VDEC_DIVX_HOME_THEATER              = 12,
@@ -676,3 +673,20 @@ struct CellVdecMpeg2Info
 	u8 ccData[2][128];
 	be_t<u64> reserved[2];
 };
+
+enum MPEG4_level
+{
+	CELL_VDEC_MPEG4_SP_L1,
+	CELL_VDEC_MPEG4_SP_L2,
+	CELL_VDEC_MPEG4_SP_L3,
+	CELL_VDEC_MPEG4_SP_D1_NTSC,
+	CELL_VDEC_MPEG4_SP_VGA,
+	CELL_VDEC_MPEG4_SP_D1_PAL,
+};
+
+struct CellVdecMpeg4SpecificInfo
+{
+	be_t<u32> thisSize;
+	be_t<u16> maxDecodedFrameWidth;
+	be_t<u16> maxDecodedFrameHeight;
+};