使用ffmpeg.exe进行转码参数说明

使用ffmpeg.exe进行转码参数说明

摘自:https://blog.csdn.net/coloriy/article/details/47337641

本文主要介绍如何使用ffmpeg.exe进行转码。编译好的ffmpeg可以从下面目录下载:

http://ffmpeg.org/download.html 

首先,可以使用-formats命令,查看ffmpeg支持的封装格式。

下面截取一段:(D、E分别表示解复用和复用)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
File formats:
 D. = Demuxing supported
 .E = Muxing supported
 --
  E 3g2             3GP2 (3GPP2 file format)
  E 3gp             3GP (3GPP file format)
 D  4xm             4X Technologies
  E a64             a64 - video for Commodore 64
 D  aac             raw ADTS AAC (Advanced Audio Coding)
 DE ac3             raw AC-3
 D  act             ACT Voice file format
 D  adf             Artworx Data Format
 D  adp             ADP
  E adts            ADTS AAC (Advanced Audio Coding)
 DE adx             CRI ADX
 D  aea             MD STUDIO audio
 D  afc             AFC
 DE aiff            Audio IFF
 DE alaw            PCM A-law
 D  alias_pix       Alias/Wavefront PIX image
 DE amr             3GPP AMR
 D  anm             Deluxe Paint Animation
 D  apc             CRYO APC
 D  ape             Monkey's Audio
 D  apng            Animated Portable Network Graphics
 D  aqtitle         AQTitle subtitles
 DE asf             ASF (Advanced / Active Streaming Format)
  E asf_stream      ASF (Advanced / Active Streaming Format)
 DE ass             SSA (SubStation Alpha) subtitle
 DE ast             AST (Audio Stream)

 可以使用-codecs命令,查看ffmpeg支持的编解码器,

ffmpeg输出格式如下:(D、E表示的解码器、编码器)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Codecs:
 D..... = Decoding supported
 .E.... = Encoding supported
 ..V... = Video codec
 ..A... = Audio codec
 ..S... = Subtitle codec
 ...I.. = Intra frame-only codec
 ....L. = Lossy compression
 .....S = Lossless compression
 -------
 D.VI.. 012v                 Uncompressed 4:2:2 10-bit
 D.V.L. 4xm                  4X Movie
 D.VI.S 8bps                 QuickTime 8BPS video
 .EVIL. a64_multi            Multicolor charset for Commodore 64 (encoders: a64multi )
 .EVIL. a64_multi5           Multicolor charset for Commodore 64, extended with 5th color (colram) (encoders: a64multi5 )
 D.V..S aasc                 Autodesk RLE
 D.VIL. aic                  Apple Intermediate Codec
 DEVI.S alias_pix            Alias/Wavefront PIX image
 DEVIL. amv                  AMV Video
 D.V.L. anm                  Deluxe Paint Animation
 D.V.L. ansi                 ASCII/ANSI art
 D.V..S apng                 APNG (Animated Portable Network Graphics) image
 DEVIL. asv1                 ASUS V1
 DEVIL. asv2                 ASUS V2
 D.VIL. aura                 Auravision AURA
 D.VIL. aura2                Auravision Aura 2
 D.V... avrn                 Avid AVI Codec
 DEVI.. avrp                 Avid 1:1 10-bit RGB Packer
 D.V.L. avs                  AVS (Audio Video Standard) video
 DEVI.. avui                 Avid Meridien Uncompressed
 DEVI.. ayuv                 Uncompressed packed MS 4:4:4:4

ffmpeg命令通常格式如下:

ffmpeg -i xxx out_file  

常用的转换格式命令如下:

1. mpeg audio转pcm原始数据

ffmpeg -i cctv2_4101.mpa -f s16le -ar 48000 -acodec pcm_s16le cctv2-4101-Normal.pcm

2. jpg转yuv

jpeg -> yuv420
ffmpeg.exe -i input_file.jpg -pix_fmt yuv420p -y output_file.yuv -v 0

yuv -> jpeg
将大小为720x576的input_file.yuv原始数据另存为jpg格式
ffmpeg.exe -y -s 720x576 -i input_file.yuv -vcodec mjpeg output_file.jpg

3. 不同封装格式转换

3gp to avi

ffmpeg -i source.3gp -f avi -vcodec xvid -acodec mp3 -ar

22050 destination.avi

flv to 3gp
ffmpeg -i source.flv -s 176×144 -vcodec h263 -r 25 -b 200
-ab 64 -acodec mp3 -ac 1 -ar 8000 destination.3gp

flv to mp4
ffmpeg -i source.flv -vcodec h264 -r 25 -b 200 -ab 128
-acodec mp3 -ac 2 -ar 44100 destination.mp3

avi to mp4
ffmpeg -i source.avi -f psp -r 29.97 -b 768k -ar 24000 -ab
64k -s 320×240 destination.mp4

mp4 to 3gp
ffmpeg -i source.mp4 -s 176×144 -vcodec h263 -r 25 -b 12200
-ab 12200 -ac 1 -ar 8000 destination.3gp

avi to 3gp
ffmpeg -i source.avi-s qcif -vcodec h263 -acodec mp3 -ac 1
-ar 8000 -r 25 -ab 32 -y destination.3gp

mpg to 3gp
ffmpeg -i source.mpg -s qcif -vcodec h263 -acodec mp3 -ac 1
-ar 8000 -ab 32 -y destination.3gp

4. yuv转h264 raw/TS

ffmpeg.exe -s 352x288 -pix_fmt yuv420p -i test_352x288.yuv -vcodec libx264 out.h264

(若输出文件改为out.ts,即可实现yuv转ts)

以下简单总结下ffmpeg命令参数:

-i 指定要转换视频的源文件
-s 视频转换后视频的分辨率
-vcodec 视频转换时使用的编解码器(-codecs)
-r 视频转换换的桢率(默认25桢每秒)
-b 视频转换换的bit率
-ab 音频转换后的bit率(默认64k)
-acodec 制度音频使用的编码器(-codecs)
-ac 制定转换后音频的声道
-ar 音频转换后的采样率

原文地址:https://www.cnblogs.com/LiuYanYGZ/p/11240243.html