On Thu, 13 Jan 2022, Michael Fabian 'Xaymar' Dirks wrote:
From: Michael Fabian 'Xaymar' Dirks <michael.di...@xaymar.com>
Fixes the color information in the output from the AMD encoder
being wrong, which led to weird transcoding results. This
problem appeared out of thin air, and I've been unable to tie
it to a specific driver that supports my hardware. Unfortunately
this requires AMF SDK version 1.4.23 or later, but it should
still work fine on older drivers.
Theoretical support for HDR encoding is also now possible,
although the implementation is not complete. I have no clear
idea on how to generate AMFs HDR metadata structure, or where
to even take this information from.
---
libavcodec/amfenc.h | 1 +
libavcodec/amfenc_h264.c | 48 +++++++++++++++++++++++++++++++++++++-
libavcodec/amfenc_hevc.c | 50 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 98 insertions(+), 1 deletion(-)
diff --git a/libavcodec/amfenc.h b/libavcodec/amfenc.h
index 358b2ef778..951e529362 100644
--- a/libavcodec/amfenc.h
+++ b/libavcodec/amfenc.h
@@ -21,6 +21,7 @@
#include <AMF/core/Factory.h>
+#include <AMF/components/ColorSpace.h>
#include <AMF/components/VideoEncoderVCE.h>
#include <AMF/components/VideoEncoderHEVC.h>
diff --git a/libavcodec/amfenc_h264.c b/libavcodec/amfenc_h264.c
index aeca99f7c6..009378e9f1 100644
--- a/libavcodec/amfenc_h264.c
+++ b/libavcodec/amfenc_h264.c
@@ -137,6 +137,8 @@ static av_cold int amf_encode_init_h264(AVCodecContext
*avctx)
AMFRate framerate;
AMFSize framesize = AMFConstructSize(avctx->width,
avctx->height);
int deblocking_filter = (avctx->flags &
AV_CODEC_FLAG_LOOP_FILTER) ? 1 : 0;
+ amf_int64 color_depth;
+ amf_int64 color_profile;
if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
framerate = AMFConstructRate(avctx->framerate.num,
avctx->framerate.den);
@@ -194,10 +196,54 @@ static av_cold int amf_encode_init_h264(AVCodecContext
*avctx)
AMF_ASSIGN_PROPERTY_RATIO(res, ctx->encoder,
AMF_VIDEO_ENCODER_ASPECT_RATIO, ratio);
}
- /// Color Range (Partial/TV/MPEG or Full/PC/JPEG)
+ // Color Metadata
+ /// Color Range (Support for older Drivers)
if (avctx->color_range == AVCOL_RANGE_JPEG) {
AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder,
AMF_VIDEO_ENCODER_FULL_RANGE_COLOR, 1);
+ } else {
+ AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder,
AMF_VIDEO_ENCODER_FULL_RANGE_COLOR, 0);
+ }
+ /// Color Space & Depth
+ color_depth = AMF_COLOR_BIT_DEPTH_8;
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_UNKNOWN;
+ switch (avctx->colorspace) {
+ case AVCOL_SPC_SMPTE170M:
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_601;
+ } else {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_601;
+ }
+ break;
+ case AVCOL_SPC_BT709:
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_709;
+ } else {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_709;
+ }
+ break;
+ case AVCOL_SPC_BT2020_NCL:
+ case AVCOL_SPC_BT2020_CL:
+ // !FIXME: Verify that this is correct on Hardware supporting it.
+ // !FIXME: Figure out how to decide on bit depth.
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_2020;
+ color_depth = AMF_COLOR_BIT_DEPTH_10;
+ } else {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_2020;
+ color_depth = AMF_COLOR_BIT_DEPTH_10;
+ }
What does this do? Force a 10 bit output even if the input surfaces are 8
bit? I am uneasy about setting output bit depth based on colorspace.
Considering that only 8 bit source formats are supported in amfenc.c
format_map at the moment... So maybe in this patch it is better to
keep everything 8 bit for now?
+ break;
}
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_COLOR_BIT_DEPTH, color_depth);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_INPUT_COLOR_PROFILE, color_profile);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_OUTPUT_COLOR_PROFILE, color_profile);
+ /// Color Transfer Characteristics (AMF matches ISO/IEC)
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_INPUT_TRANSFER_CHARACTERISTIC, (amf_int64)avctx->color_trc);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_OUTPUT_TRANSFER_CHARACTERISTIC, (amf_int64)avctx->color_trc);
+ /// Color Primaries (AMF matches ISO/IEC)
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_INPUT_COLOR_PRIMARIES, (amf_int64)avctx->color_primaries);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_OUTPUT_COLOR_PRIMARIES, (amf_int64)avctx->color_primaries);
+ /// !TODO: AMF HDR Metadata generation
// autodetect rate control method
if (ctx->rate_control_mode ==
AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_UNKNOWN) {
diff --git a/libavcodec/amfenc_hevc.c b/libavcodec/amfenc_hevc.c
index 79541b9b2f..900e1482b4 100644
--- a/libavcodec/amfenc_hevc.c
+++ b/libavcodec/amfenc_hevc.c
This is a lot of code duplication with amfenc_h264. Setting color space
and depth should be factorized to a helper function and that should be
added to amfenc.c.
Regards,
Marton
@@ -104,6 +104,8 @@ static av_cold int amf_encode_init_hevc(AVCodecContext
*avctx)
AMFRate framerate;
AMFSize framesize = AMFConstructSize(avctx->width,
avctx->height);
int deblocking_filter = (avctx->flags &
AV_CODEC_FLAG_LOOP_FILTER) ? 1 : 0;
+ amf_int64 color_depth;
+ amf_int64 color_profile;
if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
framerate = AMFConstructRate(avctx->framerate.num,
avctx->framerate.den);
@@ -152,6 +154,54 @@ static av_cold int amf_encode_init_hevc(AVCodecContext
*avctx)
AMFRatio ratio = AMFConstructRatio(avctx->sample_aspect_ratio.num,
avctx->sample_aspect_ratio.den);
AMF_ASSIGN_PROPERTY_RATIO(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_ASPECT_RATIO, ratio);
}
+
+ // Color Metadata
+ /// Color Range (Support for older Drivers)
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_NOMINAL_RANGE, 1);
+ } else {
+ AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_NOMINAL_RANGE, 0);
+ }
+ /// Color Space & Depth
+ color_depth = AMF_COLOR_BIT_DEPTH_8;
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_UNKNOWN;
+ switch (avctx->colorspace) {
+ case AVCOL_SPC_SMPTE170M:
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_601;
+ } else {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_601;
+ }
+ break;
+ case AVCOL_SPC_BT709:
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_709;
+ } else {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_709;
+ }
+ break;
+ case AVCOL_SPC_BT2020_NCL:
+ case AVCOL_SPC_BT2020_CL:
+ // !FIXME: Verify that this is correct on Hardware supporting it.
+ // !FIXME: Figure out how to decide on bit depth.
+ if (avctx->color_range == AVCOL_RANGE_JPEG) {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_2020;
+ color_depth = AMF_COLOR_BIT_DEPTH_10;
+ } else {
+ color_profile = AMF_VIDEO_CONVERTER_COLOR_PROFILE_2020;
+ color_depth = AMF_COLOR_BIT_DEPTH_10;
+ }
+ break;
+ }
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_COLOR_BIT_DEPTH, color_depth);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_INPUT_COLOR_PROFILE, color_profile);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_OUTPUT_COLOR_PROFILE, color_profile);
+ /// Color Transfer Characteristics (AMF matches ISO/IEC)
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_INPUT_TRANSFER_CHARACTERISTIC, (amf_int64)avctx->color_trc);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_OUTPUT_TRANSFER_CHARACTERISTIC,
(amf_int64)avctx->color_trc);
+ /// Color Primaries (AMF matches ISO/IEC)
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_INPUT_COLOR_PRIMARIES, (amf_int64)avctx->color_primaries);
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_OUTPUT_COLOR_PRIMARIES, (amf_int64)avctx->color_primaries);
// Picture control properties
AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder,
AMF_VIDEO_ENCODER_HEVC_NUM_GOPS_PER_IDR, ctx->gops_per_idr);
--
2.34.1.windows.1
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