On 12/16/2024 5:05 PM, Scott Theisen wrote:
On 12/15/24 22:25, James Almer wrote:On 12/15/2024 1:14 AM, Scott Theisen wrote:Originally from:https://github.com/MythTV/mythtv/ commit/669955c6cb29196b4b5120451b5b998d67a65749--- libavcodec/v4l2_buffers.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+)diff --git a/libavcodec/v4l2_buffers.c b/libavcodec/v4l2_buffers.c index 23474ee143..56a8f0825c 100644 --- a/libavcodec/v4l2_buffers.c +++ b/libavcodec/v4l2_buffers.c@@ -210,6 +210,43 @@ static enum AVColorTransferCharacteristic v4l2_get_color_trc(V4L2Buffer *buf)return AVCOL_TRC_UNSPECIFIED; } +static void v4l2_get_interlacing(AVFrame *frame, V4L2Buffer *buf) +{ + enum v4l2_field field; + field = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.field : + buf->context->format.fmt.pix.field; ++ if (field == V4L2_FIELD_INTERLACED || field == V4L2_FIELD_INTERLACED_TB) {+ frame->flags |= AV_FRAME_FLAG_INTERLACED; + frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST; +#if FF_API_INTERLACED_FRAME +FF_DISABLE_DEPRECATION_WARNINGS + frame->interlaced_frame = 1; + frame->top_field_first = 1;No need to set these two fields. It's done by the generic code.OK, I'll remove those lines. Although it is not clear to me when those will be set after libavcodec/pthread_frame.c calls ff_decode_receive_frame_internal().
They are set in decode_receive_frame_internal(), libavcodec/decode.c, not too long before the frame is ultimately returned to the caller.
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