[FFmpeg-devel] [PATCH, v2] avcodec/d3d12va_encode: texture array support for HEVC
Tong Wu
wutong1208 at outlook.com
Tue May 20 18:06:27 EEST 2025
Araz Iusubov:
> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of Araz
> Iusubov
> Sent: Friday, May 16, 2025 5:44 PM
> To: ffmpeg-devel at ffmpeg.org
> Cc: Araz Iusubov <Primeadvice at gmail.com>
> Subject: [FFmpeg-devel] [PATCH, v2] avcodec/d3d12va_encode: texture array
> support for HEVC
>
> This patch adds support for the texture array feature used by AMD boards in the
> D3D12 HEVC encoder.
> In texture array mode, a single texture array is shared for all reference and
> reconstructed pictures using different subresources.
> The implementation ensures compatibility and has been successfully tested on
> AMD, Intel, and NVIDIA GPUs.
>
> v2 updates:
> 1. The reference to MaxL1ReferencesForB for the H.264 codec was updated to
> use the corresponding H.264 field instead of the HEVC one.
> 2. Max_subresource_array_size calculation was adjusted by removing the
> D3D12VA_VIDEO_ENC_ASYNC_DEPTH offset.
>
> ---
> libavcodec/d3d12va_encode.c | 241 +++++++++++++++++++++++++------
> libavcodec/d3d12va_encode.h | 29 ++++
> libavcodec/d3d12va_encode_hevc.c | 5 +-
> 3 files changed, 231 insertions(+), 44 deletions(-)
>
> diff --git a/libavcodec/d3d12va_encode.c b/libavcodec/d3d12va_encode.c index
> 4d738200fe..d428ad1fd8 100644
> --- a/libavcodec/d3d12va_encode.c
> +++ b/libavcodec/d3d12va_encode.c
> @@ -264,6 +264,11 @@ static int d3d12va_encode_issue(AVCodecContext
> *avctx,
>
> av_log(avctx, AV_LOG_DEBUG, "Input surface is %p.\n", pic->input_surface-
> >texture);
>
> + if (ctx->is_texture_array) {
> + base_pic->recon_image->data[0] = ctx->texture_array_frame;
> + pic->subresource_index = (ctx->subresource_used_index++) % ctx-
> >max_subresource_array_size;
> + }
> +
> pic->recon_surface = (AVD3D12VAFrame *)base_pic->recon_image->data[0];
> av_log(avctx, AV_LOG_DEBUG, "Recon surface is %p.\n",
> pic->recon_surface->texture); @@ -325,11 +330,28 @@ static int
> d3d12va_encode_issue(AVCodecContext *avctx,
> goto fail;
> }
>
> + if (ctx->is_texture_array) {
> + d3d12_refs.pSubresources = av_calloc(d3d12_refs.NumTexture2Ds,
> + sizeof(*d3d12_refs.pSubresources));
> + if (!d3d12_refs.pSubresources) {
> + err = AVERROR(ENOMEM);
> + goto fail;
> + }
> + }
> +
> i = 0;
> - for (j = 0; j < base_pic->nb_refs[0]; j++)
> - d3d12_refs.ppTexture2Ds[i++] = ((D3D12VAEncodePicture *)base_pic-
> >refs[0][j]->priv)->recon_surface->texture;
> - for (j = 0; j < base_pic->nb_refs[1]; j++)
> - d3d12_refs.ppTexture2Ds[i++] = ((D3D12VAEncodePicture *)base_pic-
> >refs[1][j]->priv)->recon_surface->texture;
> + for (j = 0; j < base_pic->nb_refs[0]; j++) {
> + d3d12_refs.ppTexture2Ds[i] = ((D3D12VAEncodePicture *)base_pic-
> >refs[0][j]->priv)->recon_surface->texture;
> + if (ctx->is_texture_array)
> + d3d12_refs.pSubresources[i] = ((D3D12VAEncodePicture *)base_pic-
> >refs[0][j]->priv)->subresource_index;
> + i++;
> + }
> + for (j = 0; j < base_pic->nb_refs[1]; j++) {
> + d3d12_refs.ppTexture2Ds[i] = ((D3D12VAEncodePicture *)base_pic-
> >refs[1][j]->priv)->recon_surface->texture;
> + if (ctx->is_texture_array)
> + d3d12_refs.pSubresources[i] = ((D3D12VAEncodePicture *)base_pic-
> >refs[1][j]->priv)->subresource_index;
> + i++;
> + }
> }
>
> input_args.PictureControlDesc.IntraRefreshFrameIndex = 0; @@ -343,7
> +365,11 @@ static int d3d12va_encode_issue(AVCodecContext *avctx,
> output_args.Bitstream.pBuffer = pic->output_buffer;
> output_args.Bitstream.FrameStartOffset = pic-
> >aligned_header_size;
> output_args.ReconstructedPicture.pReconstructedPicture = pic-
> >recon_surface->texture;
> - output_args.ReconstructedPicture.ReconstructedPictureSubresource = 0;
> + if (ctx->is_texture_array) {
> + output_args.ReconstructedPicture.ReconstructedPictureSubresource = pic-
> >subresource_index;
> + } else {
> + output_args.ReconstructedPicture.ReconstructedPictureSubresource = 0;
> + }
> output_args.EncoderOutputMetadata.pBuffer = pic-
> >encoded_metadata;
> output_args.EncoderOutputMetadata.Offset = 0;
>
> @@ -381,35 +407,87 @@ static int d3d12va_encode_issue(AVCodecContext
> *avctx,
> }, \
> }
>
> +#define TRANSITION_BARRIER_SUBRESOURCE(res, subres,before, after) \
> + (D3D12_RESOURCE_BARRIER) { \
> + .Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION, \
> + .Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE, \
> + .Transition = { \
> + .pResource = res, \
> + .Subresource = subres, \
> + .StateBefore = before, \
> + .StateAfter = after, \
> + }, \
> + }
> +
> barriers[0] = TRANSITION_BARRIER(pic->input_surface->texture,
> D3D12_RESOURCE_STATE_COMMON,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ);
> barriers[1] = TRANSITION_BARRIER(pic->output_buffer,
> D3D12_RESOURCE_STATE_COMMON,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE);
> - barriers[2] = TRANSITION_BARRIER(pic->recon_surface->texture,
> + barriers[2] = TRANSITION_BARRIER(pic->encoded_metadata,
> D3D12_RESOURCE_STATE_COMMON,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE);
> - barriers[3] = TRANSITION_BARRIER(pic->encoded_metadata,
> + barriers[3] = TRANSITION_BARRIER(pic->resolved_metadata,
> D3D12_RESOURCE_STATE_COMMON,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE);
> - barriers[4] = TRANSITION_BARRIER(pic->resolved_metadata,
> - D3D12_RESOURCE_STATE_COMMON,
> - D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE);
> -
> - ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list, 5, barriers);
> -
> - if (d3d12_refs.NumTexture2Ds) {
> - D3D12_RESOURCE_BARRIER refs_barriers[3];
> -
> - for (i = 0; i < d3d12_refs.NumTexture2Ds; i++)
> - refs_barriers[i] = TRANSITION_BARRIER(d3d12_refs.ppTexture2Ds[i],
> - D3D12_RESOURCE_STATE_COMMON,
> - D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ);
> -
> - ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list,
> d3d12_refs.NumTexture2Ds,
> - refs_barriers);
> + ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list, 4,
> + barriers);
> +
> + //set transit barriers for reference pic and recon pic
> + int barriers_ref_index = 0;
> + D3D12_RESOURCE_BARRIER *barriers_ref = NULL;
> + if (ctx->is_texture_array) {
> + barriers_ref = av_calloc(ctx->max_subresource_array_size * ctx-
> >plane_count,
> + sizeof(D3D12_RESOURCE_BARRIER));
> + } else {
> + barriers_ref =
> av_calloc(MAX_DPB_SIZE,sizeof(D3D12_RESOURCE_BARRIER));
> + }
> +
> + if (ctx->is_texture_array) {
> + // In Texture array mode, the D3D12 uses the same texture array for all the
> input
> + // reference pics in ppTexture2Ds and also for the pReconstructedPicture
> output allocations,
> + //just different subresources.
> + D3D12_RESOURCE_DESC references_tex_array_desc = { 0 };
> +
> + pic->recon_surface->texture->lpVtbl->GetDesc(pic->recon_surface->textu
> + re, &references_tex_array_desc);
> +
> + for (uint32_t reference_subresource = 0; reference_subresource <
> references_tex_array_desc.DepthOrArraySize;
> + reference_subresource++) {
> +
> + //D3D12 DecomposeSubresource
> + uint32_t mip_slice, plane_slice, array_slice, array_size;
> + array_size = references_tex_array_desc.DepthOrArraySize;
> + mip_slice = reference_subresource %
> references_tex_array_desc.MipLevels;
> + array_slice = (reference_subresource /
> + references_tex_array_desc.MipLevels) % array_size;
> +
> + for (plane_slice = 0; plane_slice < ctx->plane_count; plane_slice++) {
> + //Calculate the subresource index
> + uint32_t planeOutputSubresource = mip_slice + array_slice *
> references_tex_array_desc.MipLevels +
> + plane_slice *
> + references_tex_array_desc.MipLevels * array_size;
> +
> + if (reference_subresource == pic->subresource_index) {
> + barriers_ref[barriers_ref_index++] =
> TRANSITION_BARRIER_SUBRESOURCE(pic->recon_surface->texture,
> planeOutputSubresource,
> + D3D12_RESOURCE_STATE_COMMON,
> + D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE);
> + } else {
> + barriers_ref[barriers_ref_index++] =
> TRANSITION_BARRIER_SUBRESOURCE(pic->recon_surface->texture,
> planeOutputSubresource,
> + D3D12_RESOURCE_STATE_COMMON,
> + D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ);
> + }
> + }
> + }
> + } else {
> + barriers_ref[barriers_ref_index++] = TRANSITION_BARRIER(pic-
> >recon_surface->texture,
> + D3D12_RESOURCE_STATE_COMMON,
> +
> + D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE);
> +
> + if (d3d12_refs.NumTexture2Ds) {
> + for (i = 0; i < d3d12_refs.NumTexture2Ds; i++)
> + barriers_ref[barriers_ref_index++] =
> TRANSITION_BARRIER(d3d12_refs.ppTexture2Ds[i],
> + D3D12_RESOURCE_STATE_COMMON,
> +
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ);
> + }
> }
> + ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list,
> + barriers_ref_index, barriers_ref);
>
> ID3D12VideoEncodeCommandList2_EncodeFrame(cmd_list, ctx->encoder, ctx-
> >encoder_heap,
> &input_args, &output_args); @@ -422,16 +500,15 @@
> static int d3d12va_encode_issue(AVCodecContext *avctx,
>
>
> ID3D12VideoEncodeCommandList2_ResolveEncoderOutputMetadata(cmd_list,
> &input_metadata, &output_metadata);
>
> - if (d3d12_refs.NumTexture2Ds) {
> - D3D12_RESOURCE_BARRIER refs_barriers[3];
> -
> - for (i = 0; i < d3d12_refs.NumTexture2Ds; i++)
> - refs_barriers[i] = TRANSITION_BARRIER(d3d12_refs.ppTexture2Ds[i],
> - D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ,
> - D3D12_RESOURCE_STATE_COMMON);
> -
> - ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list,
> d3d12_refs.NumTexture2Ds,
> - refs_barriers);
> + //swap the barriers_ref transition state
> + if (barriers_ref_index > 0) {
> + for (i = 0; i < barriers_ref_index; i++) {
> + D3D12_RESOURCE_STATES temp_statue =
> barriers_ref[i].Transition.StateBefore;
> + barriers_ref[i].Transition.StateBefore =
> barriers_ref[i].Transition.StateAfter;
> + barriers_ref[i].Transition.StateAfter = temp_statue;
> + }
> + ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list,
> barriers_ref_index,
> + barriers_ref);
> }
>
> barriers[0] = TRANSITION_BARRIER(pic->input_surface->texture,
> @@ -440,17 +517,14 @@ static int d3d12va_encode_issue(AVCodecContext
> *avctx,
> barriers[1] = TRANSITION_BARRIER(pic->output_buffer,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE,
> D3D12_RESOURCE_STATE_COMMON);
> - barriers[2] = TRANSITION_BARRIER(pic->recon_surface->texture,
> - D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE,
> - D3D12_RESOURCE_STATE_COMMON);
> - barriers[3] = TRANSITION_BARRIER(pic->encoded_metadata,
> + barriers[2] = TRANSITION_BARRIER(pic->encoded_metadata,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ,
> D3D12_RESOURCE_STATE_COMMON);
> - barriers[4] = TRANSITION_BARRIER(pic->resolved_metadata,
> + barriers[3] = TRANSITION_BARRIER(pic->resolved_metadata,
> D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE,
> D3D12_RESOURCE_STATE_COMMON);
>
> - ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list, 5, barriers);
> + ID3D12VideoEncodeCommandList2_ResourceBarrier(cmd_list, 4,
> + barriers);
>
> hr = ID3D12VideoEncodeCommandList2_Close(cmd_list);
> if (FAILED(hr)) {
> @@ -489,6 +563,14 @@ static int d3d12va_encode_issue(AVCodecContext
> *avctx,
> if (d3d12_refs.ppTexture2Ds)
> av_freep(&d3d12_refs.ppTexture2Ds);
>
> + if (ctx->is_texture_array) {
> + if (d3d12_refs.pSubresources)
> + av_freep(&d3d12_refs.pSubresources);
> + }
> +
> + if (barriers_ref)
> + av_freep(&barriers_ref);
> +
> return 0;
>
> fail:
> @@ -498,6 +580,14 @@ fail:
> if (d3d12_refs.ppTexture2Ds)
> av_freep(&d3d12_refs.ppTexture2Ds);
>
> + if (ctx->is_texture_array) {
> + if (d3d12_refs.pSubresources)
> + av_freep(&d3d12_refs.pSubresources);
> + }
> +
> + if (barriers_ref)
> + av_freep(&barriers_ref);
> +
> if (ctx->codec->free_picture_params)
> ctx->codec->free_picture_params(pic);
>
> @@ -1088,13 +1178,15 @@ static int
> d3d12va_encode_init_gop_structure(AVCodecContext *avctx)
> switch (ctx->codec->d3d12_codec) {
> case D3D12_VIDEO_ENCODER_CODEC_H264:
> ref_l0 = FFMIN(support.PictureSupport.pH264Support-
> >MaxL0ReferencesForP,
> - support.PictureSupport.pH264Support-
> >MaxL1ReferencesForB);
> + support.PictureSupport.pH264Support-
> >MaxL1ReferencesForB ?
> +
> + support.PictureSupport.pH264Support->MaxL1ReferencesForB : UINT_MAX);
> ref_l1 = support.PictureSupport.pH264Support->MaxL1ReferencesForB;
> break;
>
> case D3D12_VIDEO_ENCODER_CODEC_HEVC:
> ref_l0 = FFMIN(support.PictureSupport.pHEVCSupport-
> >MaxL0ReferencesForP,
> - support.PictureSupport.pHEVCSupport-
> >MaxL1ReferencesForB);
> + support.PictureSupport.pHEVCSupport-
> >MaxL1ReferencesForB ?
> +
> + support.PictureSupport.pHEVCSupport->MaxL1ReferencesForB : UINT_MAX);
> ref_l1 = support.PictureSupport.pHEVCSupport->MaxL1ReferencesForB;
> break;
>
> @@ -1336,6 +1428,47 @@ fail:
> return err;
> }
>
> +static int d3d12va_create_texture_array(AVHWFramesContext *ctx,
> +D3D12VAEncodeContext *encode_context) {
> + AVD3D12VAFramesContext *hwctx = ctx->hwctx;
> + AVD3D12VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
> +
> + AVD3D12VAFrame *frame;
> + D3D12_HEAP_PROPERTIES props = { .Type = D3D12_HEAP_TYPE_DEFAULT };
> +
> + encode_context->max_subresource_array_size = MAX_DPB_SIZE + 1;
> +
> + D3D12_RESOURCE_DESC desc = {
> + .Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D,
> + .Alignment = 0,
> + .Width = ctx->width,
> + .Height = ctx->height,
> + .DepthOrArraySize = encode_context->max_subresource_array_size,
> + .MipLevels = 1,
> + .Format = hwctx->format,
> + .SampleDesc = {.Count = 1, .Quality = 0 },
> + .Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN,
> + .Flags = hwctx->flags,
> + };
> +
> + frame = av_mallocz(sizeof(AVD3D12VAFrame));
> + if (!frame)
> + return AVERROR(ENOMEM);
> +
> + if (FAILED(ID3D12Device_CreateCommittedResource(device_hwctx->device,
> &props, D3D12_HEAP_FLAG_NONE, &desc,
> + D3D12_RESOURCE_STATE_COMMON, NULL, &IID_ID3D12Resource, (void
> **)&frame->texture))) {
> + av_log(ctx, AV_LOG_ERROR, "Could not create the texture\n");
> + return AVERROR(EINVAL);
> + }
> +
> + ID3D12Device_CreateFence(device_hwctx->device, 0,
> D3D12_FENCE_FLAG_NONE,
> + &IID_ID3D12Fence, (void
> + **)&frame->sync_ctx.fence);
> +
> + frame->sync_ctx.event = CreateEvent(NULL, FALSE, FALSE, NULL);
> + encode_context->texture_array_frame = frame;
> + return 0;
> +}
> +
> static int d3d12va_encode_create_recon_frames(AVCodecContext *avctx) {
> FFHWBaseEncodeContext *base_ctx = avctx->priv_data; @@ -1394,6 +1527,7
> @@ int ff_d3d12va_encode_init(AVCodecContext *avctx)
> FFHWBaseEncodeContext *base_ctx = avctx->priv_data;
> D3D12VAEncodeContext *ctx = avctx->priv_data;
> D3D12_FEATURE_DATA_VIDEO_FEATURE_AREA_SUPPORT support = { 0 };
> + D3D12_FEATURE_DATA_FORMAT_INFO format_info = {0};
> int err;
> HRESULT hr;
>
> @@ -1429,6 +1563,15 @@ int ff_d3d12va_encode_init(AVCodecContext *avctx)
> goto fail;
> }
>
> + format_info.Format = ((AVD3D12VAFramesContext*)base_ctx->input_frames-
> >hwctx)->format;
> + if (FAILED(ID3D12VideoDevice_CheckFeatureSupport(ctx->hwctx->device,
> D3D12_FEATURE_FORMAT_INFO,
> + &format_info, sizeof(format_info)))) {
> + av_log(avctx, AV_LOG_ERROR, "Failed to query format plane count:
> 0x%x\n", hr);
> + err = AVERROR_EXTERNAL;
> + goto fail;
> + }
> + ctx->plane_count = format_info.PlaneCount;
> +
> err = d3d12va_encode_set_profile(avctx);
> if (err < 0)
> goto fail;
> @@ -1485,6 +1628,10 @@ int ff_d3d12va_encode_init(AVCodecContext *avctx)
> goto fail;
> }
>
> + if (ctx->is_texture_array) {
> + d3d12va_create_texture_array(base_ctx->recon_frames, avctx-
> >priv_data);
> + }
> +
> base_ctx->output_delay = base_ctx->b_per_p;
> base_ctx->decode_delay = base_ctx->max_b_depth;
>
> @@ -1528,6 +1675,18 @@ int ff_d3d12va_encode_close(AVCodecContext
> *avctx)
>
> av_buffer_pool_uninit(&ctx->output_buffer_pool);
>
> + if (ctx->is_texture_array) {
> + ID3D12Resource *pResource = ctx->texture_array_frame->texture;
> + if (pResource) {
> + D3D12_OBJECT_RELEASE(pResource);
> + ctx->texture_array_frame->texture = NULL;
> + }
> + D3D12_OBJECT_RELEASE(ctx->texture_array_frame->sync_ctx.fence);
> + if (ctx->texture_array_frame->sync_ctx.event)
> + CloseHandle(ctx->texture_array_frame->sync_ctx.event);
> + av_free(ctx->texture_array_frame);
> + }
> +
> D3D12_OBJECT_RELEASE(ctx->command_list);
> D3D12_OBJECT_RELEASE(ctx->command_queue);
>
> diff --git a/libavcodec/d3d12va_encode.h b/libavcodec/d3d12va_encode.h index
> 3b0b8153d5..fc31857f1a 100644
> --- a/libavcodec/d3d12va_encode.h
> +++ b/libavcodec/d3d12va_encode.h
> @@ -52,6 +52,8 @@ typedef struct D3D12VAEncodePicture {
> ID3D12Resource *encoded_metadata;
> ID3D12Resource *resolved_metadata;
>
> + int subresource_index;
> +
> D3D12_VIDEO_ENCODER_PICTURE_CONTROL_CODEC_DATA pic_ctl;
>
> int fence_value;
> @@ -189,6 +191,33 @@ typedef struct D3D12VAEncodeContext {
> */
> AVBufferPool *output_buffer_pool;
>
> + /**
> + * Flag indicates if the HW is texture array mode.
> + */
> + int is_texture_array;
> +
> + /**
> + * In texture array mode, the D3D12 uses the same texture array for all the
> input
> + * reference pics in ppTexture2Ds and also for the pReconstructedPicture
> output
> + * allocations, just different subresources.
> + */
> + AVD3D12VAFrame *texture_array_frame;
> +
> + /**
> + * The max number of subresources in the texture array.
> + */
> + int max_subresource_array_size;
> +
> + /**
> + * The used subresource index for pic in the texture array.
> + */
> + int subresource_used_index;
> +
> + /**
> + * The number of planes in the input DXGI FORMAT .
> + */
> + int plane_count;
> +
> /**
> * D3D12 video encoder.
> */
> diff --git a/libavcodec/d3d12va_encode_hevc.c
> b/libavcodec/d3d12va_encode_hevc.c
> index 938ba01f54..7e1d973f7e 100644
> --- a/libavcodec/d3d12va_encode_hevc.c
> +++ b/libavcodec/d3d12va_encode_hevc.c
> @@ -280,9 +280,8 @@ static int
> d3d12va_encode_hevc_init_sequence_params(AVCodecContext *avctx)
> }
>
> if (support.SupportFlags &
> D3D12_VIDEO_ENCODER_SUPPORT_FLAG_RECONSTRUCTED_FRAMES_REQUIR
> E_TEXTURE_ARRAYS) {
> - av_log(avctx, AV_LOG_ERROR, "D3D12 video encode on this device requires
> texture array support, "
> - "but it's not implemented.\n");
> - return AVERROR_PATCHWELCOME;
> + ctx->is_texture_array = 1;
> + av_log(avctx, AV_LOG_DEBUG, "D3D12 video encode on this device
> + uses texture array mode.\n");
> }
>
> desc = av_pix_fmt_desc_get(base_ctx->input_frames->sw_format);
> --
Hi Araz,
Could you please fix the compile error for gcc compiler and resubmit another version? https://patchwork.ffmpeg.org/project/ffmpeg/patch/20250516094356.372-1-Primeadvice@gmail.com/
Tong
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