如何使用FFmpeg确定文件的视频编解码器 [英] How to determine video codec of a file with FFmpeg

问题描述

如果我的电视DVD播放器不是DivX或Xvid(例如，DX50不可读)，我通常会在用其DVD播放器读取AVI文件时遇到问题.

我想制作一个快速脚本来确定这些文件的视频编解码器，然后再将它们刻录到CD-ROM或DVD.

命令

ffmpeg -i file.avi

打印视频流(mpeg4，mpeg2等)的容器"，而不是编解码器.

有任何提示吗?

谢谢

解决方案

mediainfo

mediainfo --Inform="Video;%Codec%" video.mkv

在我的情况下，

将返回:

V_MPEG4/ISO/AVC

如何使用以秒为单位或其他格式的mediainfo查找视频文件的持续时间?

ffprobe(ffmpeg)简单方法

假设您的视频只有一个视频流:

ffprobe -v error -select_streams v:0 -show_entries stream=codec_name \
  -of default=noprint_wrappers=1:nokey=1 video.mkv

在我的情况下会退货:

h264

如何以秒为单位获取视频时长，使答案成为可能.

ffprobe(ffmpeg)肮脏的方式

此方法更易于理解，但混乱.

要获取编解码器信息而不播放文件，请使用ffprobe.

$ ffprobe video.mkv
[...]
Input #0, matroska,webm, from 'video.mkv':
  Metadata:
    ENCODER         : Lavf56.25.101
  Duration: 00:28:05.15, start: 0.000000, bitrate: 4353 kb/s
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 1280x960, SAR 1:1 DAR 4:3, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
    Metadata:
      ENCODER         : Lavc56.26.100 libx264
    Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp (default)
    Metadata:
      ENCODER         : Lavc56.26.100 libvorbis

要提取视频编解码器信息-由于ffmpeg将信息发送到stderr-管道并对其进行grep:

$ ffprobe video.mkv 2>&1 >/dev/null | grep Stream.*Video
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 1280x960, SAR 1:1 DAR 4:3, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)

要进一步减少输出，请引入sed:

$ ffprobe video.mkv 2>&1 >/dev/null |grep Stream.*Video | sed -e 's/.*Video: //' -e 's/[, ].*//'
h264

I often have problems reading AVI files with my TV's DVD player if they are not DivX or Xvid (e.g., DX50 is not readable).

I'd like to make a fast script to determine the video codec of these files before burning them to CD-ROM or DVD.

The command

ffmpeg -i file.avi

prints the "container" of the video stream (mpeg4, mpeg2, etc), not the codec.

Any hint?

Thanks

解决方案

mediainfo

mediainfo --Inform="Video;%Codec%" video.mkv

will in my case return:

V_MPEG4/ISO/AVC

Answer made possible thanks to How to find duration of a video file using mediainfo in seconds or other formats?

ffprobe (ffmpeg) easy way

Assuming your video has one video stream only:

ffprobe -v error -select_streams v:0 -show_entries stream=codec_name \
  -of default=noprint_wrappers=1:nokey=1 video.mkv

Will in my case return:

h264

Answer made possible thanks to How to get video duration in seconds?

ffprobe (ffmpeg) dirty way

This method is easier to understand but messy.

To get the codec information without playing back the file, use ffprobe.

$ ffprobe video.mkv
[...]
Input #0, matroska,webm, from 'video.mkv':
  Metadata:
    ENCODER         : Lavf56.25.101
  Duration: 00:28:05.15, start: 0.000000, bitrate: 4353 kb/s
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 1280x960, SAR 1:1 DAR 4:3, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
    Metadata:
      ENCODER         : Lavc56.26.100 libx264
    Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp (default)
    Metadata:
      ENCODER         : Lavc56.26.100 libvorbis

To extract the video codec information - since ffmpeg sends information to stderr - pipe and grep it:

$ ffprobe video.mkv 2>&1 >/dev/null | grep Stream.*Video
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 1280x960, SAR 1:1 DAR 4:3, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)

To reduce the output even further, introduce sed:

$ ffprobe video.mkv 2>&1 >/dev/null |grep Stream.*Video | sed -e 's/.*Video: //' -e 's/[, ].*//'
h264

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