ffmpeg里面的av_log实现

FFmpeg av_log

最新推荐文章于 2024-07-01 16:04:24 发布

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最新推荐文章于 2024-07-01 16:04:24 发布 · 1k 阅读

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#c语言

本文介绍FFmpeg中av_log模块的实现细节，包括不同日志级别的定义及其对应的数值，通过示例代码展示了如何设置日志级别并输出不同类型的日志信息。

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ffmpeg里面的av_log实现

话不多说，直接上demo：

#include <stdio.h>
#include <libavutil/log.h>

/**
 * Print no output.
 */
#define AV_LOG_QUIET    -8

/**
 * Something went really wrong and we will crash now.
 */
#define AV_LOG_PANIC     0

/**
 * Something went wrong and recovery is not possible.
 * For example, no header was found for a format which depends
 * on headers or an illegal combination of parameters is used.
 */
#define AV_LOG_FATAL     8

/**
 * Something went wrong and cannot losslessly be recovered.
 * However, not all future data is affected.
 */
#define AV_LOG_ERROR    16

/**
 * Something somehow does not look correct. This may or may not
 * lead to problems. An example would be the use of '-vstrict -2'.
 */
#define AV_LOG_WARNING  24

/**
 * Standard information.
 */
#define AV_LOG_INFO     32

/**
 * Detailed information.
 */
#define AV_LOG_VERBOSE  40

/**
 * Stuff which is only useful for libav* developers.
 */
#define AV_LOG_DEBUG    48

/**
 * Extremely verbose debugging, useful for libav* development.
 */
#define AV_LOG_TRACE    56

#define AV_LOG_MAX_OFFSET (AV_LOG_TRACE - AV_LOG_QUIET)


int main(int argc, char *argv[])
{
   
   
    av_log_set_level(AV_LOG_MAX_OFFSET);

    av_log(NULL, AV_LOG_MAX_OFFSET, "AV_LOG_MAX_OFFSET\n");
    av_log(NULL, AV_LOG_TRACE, "AV_LOG_TRACE\n");
    av_log(NULL, AV_LOG_DEBUG, "AV_LOG_DEBUG\n");
    av_log(NULL, AV_LOG_VERBOSE, "AV_LOG_VERBOSE\n");
    av_log(NULL, AV_LOG_INFO, "AV_LOG_INFO\n");
    av_log(NULL, AV_LOG_WARNING, "AV_LOG_WARNING\n");
    av_log(NULL, AV_LOG_ERROR, "AV_LOG_ERROR\n");
    av_log(NULL, AV_LOG_FATAL, "AV_LOG_FATAL\n");
    av_log(NULL, AV_LOG_PANIC, "AV_LOG_PANIC\n");
    av_log(NULL, AV_LOG_QUIET, "AV_LOG_QUIET\n");

    return 0;