Unlike H264/H265, AV1 contains no fields to crop encoded output to specific sizes. AMD's hardware cannot handle encoding of unaligned dimensions for AV1, hence it codes 1920x1080 as 1920x1088.
Add side data to crop the output back to the original dimensions. There's an AV1-spec extension planned to fix this here: https://github.com/AOMediaCodec/av1-spec/pull/346 But it seems to have stuck for now. --- libavcodec/hw_base_encode.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/libavcodec/hw_base_encode.c b/libavcodec/hw_base_encode.c index 7b6ec97d3b..6e67c9c301 100644 --- a/libavcodec/hw_base_encode.c +++ b/libavcodec/hw_base_encode.c @@ -22,6 +22,7 @@ #include "libavutil/log.h" #include "libavutil/mem.h" #include "libavutil/pixdesc.h" +#include "libavutil/intreadwrite.h" #include "encode.h" #include "avcodec.h" @@ -551,6 +552,30 @@ int ff_hw_base_encode_set_output_property(FFHWBaseEncodeContext *ctx, (3 * ctx->output_delay + ctx->async_depth)]; } + if ((avctx->codec_id == AV_CODEC_ID_AV1) && + ((avctx->coded_width != avctx->width) || + (avctx->coded_height != avctx->height)) { + int err; + size_t crop_data_size = 4*4; + + uint8_t *crop_data = av_mallocz(crop_data_size); + if (!crop_data) { + av_buffer_unref(&pkt->buf); + return AVERROR(ENOMEM); + } + + AV_WL32(&crop_data[2], ctx->surface_width - avctx->width); + AV_WL32(&crop_data[3], ctx->surface_height - avctx->height); + + err = av_packet_add_side_data(pkt, AV_PKT_DATA_FRAME_CROPPING, + crop_data, crop_data_size); + if (err < 0) { + av_buffer_unref(&pkt->buf); + av_free(crop_data); + return err; + } + } + return 0; } -- 2.45.2.753.g447d99e1c3b _______________________________________________ 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".
