closed_gop -- This is a one-bit flag which indicates the nature of the predictions uses in the B-pictures (if any) immediately following the first coded I-frame following the group of picture header .
closed_gop is set to “1” to indicate that these B-pictures have been encoded using only backward prediction.
This bit is provided for use during any editing which occurs after encoding. If the previous pictures have been removed by editing, broken_link may be set to "1" so that a decoder may avoid displaying these B-Pictures following the first I-Picture following the group of picture header. However if the closed_gop bit is set to “1’, then the editor may choose not to set the broken_link bit as these B-Pictures can be correctly decoded.
broken_link -- This is a one-bit flag which shall be set to "0" during encoding. It is set to "1" to indicate that the first B-Pictures (if any) immediately following the first coded I-frame following the group of picture header may not be correctly decoded because the reference frame which is used for prediction is not available (because of the action of editing).
A decoder may use this flag to avoid displaying frames that cannot be correctly decoded.
本站仅提供存储服务，所有内容均由用户发布，如发现有害或侵权内容，请
点击举报。
