ffmpeg- 部分错误码-av_interleaved_write_frame/av_write_frame

如有错误，请指正，谢谢。

部分返回值错误码

ffmpeg源码部分返回值形式为：

**AVERROR（EINVAL）**
**AVERROR（EPIPE）**
**AVERROR（ENOMEM）**
......

再看一下ffmpeg内部对于宏的实现，AVERROR

/* error handling */
#if EDOM > 0
#define AVERROR(e) (-(e))   ///< Returns a negative error code from a POSIX error code, to return from library functions.
#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
#else
/* Some platforms have E* and errno already negated. */
#define AVERROR(e) (e)
#define AVUNERROR(e) (e)
#