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)
#endif

所以大胆猜测（新手，看过的源码太少），错误码计数比较小的值应该是操作系统内部定义好的错误码。

Linux error_base.h

#ifndef _ASM_GENERIC_ERRNO_BASE_H
#define _ASM_GENERIC_ERRNO_BASE_H

#define EPERM        1  /* Operation not permitted */
#define ENOENT       2  /* No such file or directory */
#define ESRCH        3  /* No such process */
#define EINTR        4  /* Interrupted system call */
#define EIO      5  /* I/O error */
#define ENXIO        6  /* No such device or address */
#define E2BIG        7  /* Argument list too long */
#define ENOEXEC      8  /* Exec format error */
#define EBADF        9  /* Bad file number */
#define ECHILD      10  /* No child processes */
#define EAGAIN      11  /* Try again */
#define ENOMEM      12  /* Out of memory */
#define EACCES      13  /* Permission denied */
#define EFAULT      14  /* Bad address */
#define ENOTBLK     15  /* Block device required */
#define EBUSY       16  /* Device or resource busy */
#define EEXIST      17  /* File exists */
#define EXDEV       18  /* Cross-device link */
#define ENODEV      19  /* No such device */
#define ENOTDIR     20  /* Not a directory */
#define EISDIR      21  /* Is a directory */
#define EINVAL      22  /* Invalid argument */
#define ENFILE      23  /* File table overflow */
#define EMFILE      24  /* Too many open files */
#define ENOTTY      25  /* Not a typewriter */
#define ETXTBSY     26  /* Text file busy */
#define EFBIG       27  /* File too large */
#define ENOSPC      28  /* No space left on device */
#define ESPIPE      29  /* Illegal seek */
#define EROFS       30  /* Read-only file system */
#define EMLINK      31  /* Too many links */
#define EPIPE       32  /* Broken pipe */
#define EDOM        33  /* Math argument out of domain of func */
#define ERANGE      34  /* Math result not representable */

#endif

av_interleaved_write_frame/av_write_frame 返回值

0代表发送/写入成功，负数表示错误码。
我遇到的几个错误码：
-22：参数错误，例如AVPacket的stream_index的值不正确，dts不过滤（没有递增）等等
-32：管道阻塞：这个一般是socket错误，我遇到的情况是，推流的服务器断开了socket链接，导致发送失败。（不知道为什么ffmpeg日志没有打印这个。）

欢迎转载: https://blog.csdn.net/shizheng163