如何启用 FFMPEG 日志记录以及在哪里可以找到 FFMPEG 日志文件? [英] How do I enable FFMPEG logging and where can I find the FFMPEG log file?
问题描述
我希望能够记录 FFMPEG 进程,因为我正在尝试计算转换一分钟的视频需要多长时间,以帮助规划我的视频编码服务器的容量.如何启用日志记录以及日志文件保存在哪里.我在 CentOS LAMP 机器上安装了 FFMPEG.
I want to be able to log FFMPEG processes because I am trying to work out how long a minute of video takes to convert to help with capacity planning of my video encoding server. How do I enable logging and where is the log file saved. I have FFMPEG installed on a CentOS LAMP machine.
推荐答案
FFmpeg 不会写入特定的日志文件,而是将其输出发送到 标准错误.要捕获它,您需要
FFmpeg does not write to a specific log file, but rather sends its output to standard error. To capture that, you need to either
- 在生成时捕获并解析它
- 将标准错误重定向到一个文件并在该过程完成后读取该文件
标准错误重定向示例:
ffmpeg -i myinput.avi {a-bunch-of-important-params} out.flv 2> /path/to/out.txt
过程完成后,您可以检查out.txt
.
Once the process is done, you can inspect out.txt
.
做第一个选项有点棘手,但这是可能的.(我自己已经完成了.其他人也是如此.请查看 SO 和网络了解详细信息.)
It's a bit trickier to do the first option, but it is possible. (I've done it myself. So have others. Have a look around SO and the net for details.)
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