skip_loop_filter和skip_frame

[playererer]

/**
 * Skip loop filtering for selected frames.
 * - encoding: unused
 * - decoding: Set by user.
 */
enum AVDiscard skip_loop_filter;

/**
 * Skip decoding for selected frames.
 * - encoding: unused
 * - decoding: Set by user.
 */
enum AVDiscard skip_frame;

请问一下这两个参数的具体含义，从注释里面没看明白，
skip_loop_filter：48 是指选中的48帧不进行环路滤波吗？这是怎么选的呢？
skip_frame：8 是指在解码性能不足的情况下跳过选中的8帧不解吗？还是其他的含义呢？

麻烦知道的帮忙解答一下，谢谢！

[weyless]

https://www.ffmpeg.org/ffplay-all.html
(search skip_loop_filter)
https://www.ffmpeg.org/doxygen/trunk/group__lavc__decoding.html
(search AVDISCARD)

[playererer]

非常感谢！

[DysaniazzZ]

As the ffplay Document says: skip_frame means skips decoding, and skip_loop_filter means skips frame loop filtering. And the value is below:

IJK_AVDISCARD_NONE = -16, discard nothing;
IJK_AVDISCARD_DEFAULT = 0, discard useless packets like 0 size packets in avi;
IJK_AVDISCARD_NONREF = 8, discard all non reference;
IJK_AVDISCARD_BIDIR = 16, discard all bidirectional frames;
IJK_AVDISCARD_NONKEY = 32, discard all frames except keyframes;
IJK_AVDISCARD_ALL = 48, discard all;