On Fri, 2022-07-01 at 20:48 +0000, ffmpegagent wrote:
Missing SEI information has always been a major drawback when using the QSV decoders. I used to think that there's no chance to get at the data without explicit implementation from the MSDK side (or doing something weird like parsing in parallel). It turned out that there's a hardly known api method that provides access to all SEI (h264/hevc) or user data (mpeg2video).
This allows to get things like closed captions, frame packing, display orientation, HDR data (mastering display, content light level, etc.) without having to rely on those data being provided by the MSDK as extended buffers.
The commit "Implement SEI parsing for QSV decoders" includes some hard-coded workarounds for MSDK bugs which I reported:
https://github.com/Intel-Media-SDK/MediaSDK/issues/2597#issuecomment-1072795...
But that doesn't help. Those bugs exist and I'm sharing my workarounds, which are empirically determined by testing a range of files. If someone is interested, I can provide private access to a repository where we have been testing this. Alternatively, I could also leave those workarounds out, and just skip those SEI types.
In a previous version of this patchset, there was a concern that payload data might need to be re-ordered. Meanwhile I have researched this carefully and the conclusion is that this is not required.
My detailed analysis can be found here: https://gist.github.com/softworkz/36c49586a8610813a32270ee3947a932
v4
* add new dependencies in makefile Now, build still works when someone uses configure --disable-decoder=h264 --disable-decoder=hevc --disable-decoder=mpegvideo --disable-decoder=mpeg1video --disable-decoder=mpeg2video --enable-libmfx
v3
* frame.h: clarify doc text for av_frame_copy_side_data()
v2
* qsvdec: make error handling consistent and clear * qsvdec: remove AV_CODEC_ID_MPEG1VIDEO constants * hevcdec: rename function to ff_hevc_set_side_data(), add doc text
v3
* qsvdec: fix c/p error
softworkz (6): avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() avcodec/vpp_qsv: Copy side data from input to output frame avcodec/mpeg12dec: make mpeg_decode_user_data() accessible avcodec/hevcdec: make set_side_data() accessible avcodec/h264dec: make h264_export_frame_props() accessible avcodec/qsvdec: Implement SEI parsing for QSV decoders
doc/APIchanges | 4 + libavcodec/Makefile | 6 +- libavcodec/h264_slice.c | 98 ++++++++------- libavcodec/h264dec.h | 2 + libavcodec/hevcdec.c | 117 +++++++++--------- libavcodec/hevcdec.h | 9 ++ libavcodec/hevcdsp.c | 4 + libavcodec/mpeg12.h | 28 +++++ libavcodec/mpeg12dec.c | 40 +----- libavcodec/qsvdec.c | 234 +++++++++++++++++++++++++++++++++++ libavfilter/qsvvpp.c | 6 + libavfilter/vf_overlay_qsv.c | 19 ++- libavutil/frame.c | 67 ++++++---- libavutil/frame.h | 32 +++++ libavutil/version.h | 2 +- 15 files changed, 494 insertions(+), 174 deletions(-)
base-commit: 6a82412bf33108111eb3f63076fd5a51349ae114 Published-As: https://github.com/ffstaging/FFmpeg/releases/tag/pr-ffstaging-31%2Fsoftworkz... Fetch-It-Via: git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging- 31/softworkz/submit_qsv_sei-v5 Pull-Request: https://github.com/ffstaging/FFmpeg/pull/31
Range-diff vs v4:
1: 7656477360 = 1: 7656477360 avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() 2: 06976606c5 = 2: 06976606c5 avcodec/vpp_qsv: Copy side data from input to output frame 3: 320a8a535c = 3: 320a8a535c avcodec/mpeg12dec: make mpeg_decode_user_data() accessible 4: e58ad6564f = 4: e58ad6564f avcodec/hevcdec: make set_side_data() accessible 5: a57bfaebb9 = 5: 4c0b6eb4cb avcodec/h264dec: make h264_export_frame_props() accessible 6: 3f2588563e ! 6: 19bc00be4d avcodec/qsvdec: Implement SEI parsing for QSV decoders @@ Commit message
Signed-off-by: softworkz <softworkz@hotmail.com>
+ ## libavcodec/Makefile ## +@@ libavcodec/Makefile: OBJS-$(CONFIG_MSS34DSP) += mss34dsp.o + OBJS-$(CONFIG_PIXBLOCKDSP) += pixblockdsp.o + OBJS-$(CONFIG_QPELDSP) += qpeldsp.o + OBJS-$(CONFIG_QSV) += qsv.o +-OBJS-$(CONFIG_QSVDEC) += qsvdec.o ++OBJS-$(CONFIG_QSVDEC) += qsvdec.o h264_slice.o h264_cabac.o h264_cavlc.o \ ++ h264_direct.o h264_mb.o h264_picture.o h264_loopfilter.o \ ++ h264dec.o h264_refs.o cabac.o hevcdec.o hevc_refs.o \ ++ hevc_filter.o hevc_cabac.o hevc_mvs.o hevcpred.o hevcdsp.o \ ++ h274.o dovi_rpu.o mpeg12dec.o + OBJS-$(CONFIG_QSVENC) += qsvenc.o + OBJS-$(CONFIG_RANGECODER) += rangecoder.o + OBJS-$(CONFIG_RDFT) += rdft.o + + ## libavcodec/hevcdsp.c ## +@@ + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110- 1301 USA + */ + ++#include "config_components.h" ++ + #include "hevcdsp.h" + + static const int8_t transform[32][32] = { +@@ libavcodec/hevcdsp.c: int i = 0; + break; + } + ++#if CONFIG_HEVC_DECODER + #if ARCH_AARCH64 + ff_hevc_dsp_init_aarch64(hevcdsp, bit_depth); + #elif ARCH_ARM +@@ libavcodec/hevcdsp.c: int i = 0; + #elif ARCH_LOONGARCH + ff_hevc_dsp_init_loongarch(hevcdsp, bit_depth); + #endif ++#endif + } + ## libavcodec/qsvdec.c ## @@ #include "hwconfig.h"
Is there any comment on this patchset ? If not, I'd like to merge it to make QSV decoders works with SEI info. Thanks Haihao