├── .gitattributes ├── LICENSE ├── README.md ├── dffmpeg.sh ├── dffmpeg_result.mp4 └── test_video.mp4 /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # 分布式FFMPEG转码集群 2 | 3 | ## 代码思路 4 | 5 | - 分布式转码集群 6 | - 暂时的目标: FFMPEG实现任意格式转MP4。 7 | - 存储暂时采用单节点的共享存储(NFS)，可尝试分布式存储。 8 | - 所有节点对CPU架构无要求，可使用x86+ARM。 9 | - 控制节点和计算节点通信暂时使用SSH。 10 | - 思路: 控制节点收到请求，将文件传到共享存储，计算视频总帧数，然后发送命令给计算节点，不同节点按照各自权重(手动设置，可加性能测试功能)处理一定的连续帧，输出到共享存储，全部节点转码完毕后交由存储节点进行合并，并清理共享临时文件，最后控制节点返回转码后的视频链接。 11 | 12 | ## 已知问题（待解决） 13 | 14 | - **ffmpeg还在运行但已经执行了后面的touch语句**，导致控制代码认为节点已经转码完成。这个我还没想明白为什么。代码如下： 15 | ```shell 16 | # ssh ${compute_node[$i]} -p ${compute_node_ssh_port[$i]} "ffmpeg -i $upload_path/$filename -ss $part_start -to $part_end $ffmpeg_output_parameter $tmp_path/${filename}_$i.mp4 -loglevel error; touch $tmp_path/${filename}_$i.txt" 17 | ssh 10.1.1.172 -p 22 ffmpeg -i /srv/distributed_ffmpeg_transcoding_shared_files/upload/1530104749 -ss 0 -to 8.76 -c:v mpeg4 -b:v 1M /srv/distributed_ffmpeg_transcoding_shared_files/tmp/1530104749_0.mp4 -loglevel error && touch /srv/distributed_ffmpeg_transcoding_shared_files/tmp/1530104749_0.txt 18 | ``` 19 | 20 | ## 安装与配置 21 | 22 | - 测试组网：三台公网VPS cn.gcc.ac.cn, hk.gcc.ac.cn, us.gcc.ac.cn 23 | - 存储节点：hk.gcc.ac.cn 24 | - 控制节点：cn.gcc.ac.cn 25 | - 计算节点：cn.gcc.ac.cn,hk.gcc.ac.cn,us.gcc.ac.cn 26 | 27 | ### 存储节点 28 | 29 | - 存储节点系统是Debian 30 | 31 | ```shell 32 | # 安装NFS 33 | apt-get install nfs-kernel-server 34 | # 新建共享文件夹，用于放渲染前上传的文件、渲染后的分片文件、渲染后的完整文件。 35 | mkdir -p /srv/distributed_ffmpeg_transcoding_shared_files 36 | mkdir /srv/distributed_ffmpeg_transcoding_shared_files/upload 37 | mkdir /srv/distributed_ffmpeg_transcoding_shared_files/tmp 38 | mkdir /srv/distributed_ffmpeg_transcoding_shared_files/download 39 | chmod -R 777 /srv/distributed_ffmpeg_transcoding_shared_files 40 | ``` 41 | 42 | - 修改文件`/etc/exports`，将目录共享出去 43 | - upload目录，控制节点有读写权限，计算节点有只读权限 44 | - tmp，计算节点有读写权限 45 | - download目录，存储计算节点有读写权限（由于这里只有单节点存储，就不需要共享了） 46 | 47 | ```shell 48 | # /etc/exports: the access control list for filesystems which may be exported 49 | # to NFS clients. See exports(5). 50 | # 51 | # Example for NFSv2 and NFSv3: 52 | # /srv/homes hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check) 53 | # 54 | # Example for NFSv4: 55 | # /srv/nfs4 gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check) 56 | # /srv/nfs4/homes gss/krb5i(rw,sync,no_subtree_check) 57 | # 58 | /srv/distributed_ffmpeg_transcoding_shared_files/upload cn.gcc.ac.cn(ro,insecure) us.gcc.ac.cn(ro,insecure) 59 | /srv/distributed_ffmpeg_transcoding_shared_files/tmp cn.gcc.ac.cn(rw,insecure) us.gcc.ac.cn(rw,insecure) 60 | ``` 61 | 62 | - **注：特别注意要用insecure，否则会挂载不上，显示access denied。这个坑了我好久。** 63 | - 修改完后用`exportfs -arv`生效。可以使用`showmount -e`查看。 64 | 65 | ### 计算节点 66 | 67 | ```shell 68 | # 新建目录 69 | mkdir -p /srv/distributed_ffmpeg_transcoding_shared_files/upload 70 | mkdir -p /srv/distributed_ffmpeg_transcoding_shared_files/tmp 71 | # 挂载NFS，这里只是临时挂载，可以修改fstab或开机启动脚本进行自动挂载 72 | mount hk.gcc.ac.cn:/srv/distributed_ffmpeg_transcoding_shared_files/upload /srv/distributed_ffmpeg_transcoding_shared_files/upload 73 | mount hk.gcc.ac.cn:/srv/distributed_ffmpeg_transcoding_shared_files/tmp /srv/distributed_ffmpeg_transcoding_shared_files/tmp 74 | # 安装ffmpeg 75 | apt-get install ffmpeg 76 | ``` 77 | - 注：现在jessie要在`source.list`添加`deb http://ftp.debian.org/debian jessie-backports main`才能找到这个包。 78 | 79 | ### 控制节点 80 | 81 | ```shell 82 | # 生成ssh公钥并拷贝到计算节点 83 | ssh-keygen -t rsa 84 | ssh-copy-id -i ~/.ssh/id_rsa.pub hk.gcc.ac.cn # 拷贝公钥到计算节点 85 | ssh-copy-id -i ~/.ssh/id_rsa.pub us.gcc.ac.cn -p 10022 # 拷贝公钥到计算节点，这个节点的ssh端口是10022 86 | # 创建并挂载upload目录 87 | mkdir -p /srv/distributed_ffmpeg_transcoding_shared_files/upload 88 | mount hk.gcc.ac.cn:/srv/distributed_ffmpeg_transcoding_shared_files/upload /srv/distributed_ffmpeg_transcoding_shared_files/upload 89 | ``` 90 | 91 | 下载`dffmpeg.sh`并加执行权限。脚本使用方法如下： 92 | 93 | ``` 94 | Usage：dffmpeg.sh [input_file] [ffmpeg_output_parameter] 95 | Usage：dffmpeg.sh test.mp4 96 | Usage：dffmpeg.sh test.mp4 -c:v mpeg4 97 | Usage：dffmpeg.sh test.mp4 -c:v mpeg4 -b:v 1M 98 | ``` 99 | 100 | ## 测试 101 | 102 | - 在控制节点运行：`dffmpeg.sh test_video.mp4 -c:v mpeg4 -b:v 1M` 103 | - 其中test_video.mp4为需要转码的文件，mpeg4是编码格式，1M是视频码率。 104 | - 最后会输出一个mp4文件在download目录。 105 | - 由于我的三个服务器分布在公网不同地域，瓶颈在NFS的读写速度，所以最终转码速度会比较慢。如果服务器先缓存了要转码的文件，那么最终转码速度是比一台服务器转码快的。 106 | - 代码运行效果如下图 107 | ![代码运行效果图](https://img-blog.csdn.net/2018062412264794?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ltZHlm/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70) 108 | - 转码后的视频可以看dffmpeg_result.mp4。（这个是我用树莓派集群转的） 109 | 110 | ## 结束语 111 | 112 | - 觉得这个好玩，所以我就写了。本来是打算用几个树莓派做测试的，不过树莓派现在只有一个，先用VPS测试一下。 113 | - 脚本中有一段注释了的代码`for i in {0..${#compute_node[*]}}`，这是我一开始的写法，但是发现不能用。我不知道为什么不能那样写，所以写成`for ((i=0; i<$node_number; i++))`。如果知道答案的还请指点一下。 114 | - 我觉得`不断检查任务是否完成`那部分的判断代码不大好看，不知道有没有更简洁的方法。 115 | 116 | ## 更新日志 117 | 118 | - v1.1：修复问题：最后的视频长度会比原来长。原因在于`-ss`参数的位置，详见代码注释。 119 | - v1.2：新增内容：支持FFmpeg输出参数。输出彩色详细信息。 120 | 121 | ## 我的博客相关文章 122 | 123 | - [分布式FFMPEG转码集群](https://blog.gcc.ac.cn/post/2018/%E5%88%86%E5%B8%83%E5%BC%8Fffmpeg%E8%BD%AC%E7%A0%81%E9%9B%86%E7%BE%A4/) 124 | - [树莓派集群（分布式FFMPEG转码）](https://blog.gcc.ac.cn/post/2018/%E6%A0%91%E8%8E%93%E6%B4%BE%E9%9B%86%E7%BE%A4%E5%88%86%E5%B8%83%E5%BC%8Fffmpeg%E8%BD%AC%E7%A0%81/) 125 | -------------------------------------------------------------------------------- /dffmpeg.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # 分布式FFMPEG转码 v1.3 4 | # 支持任意格式视频转成MP4 5 | # Usage：dffmpeg.sh [input_file] [ffmpeg_output_parameter] 6 | # Usage：dffmpeg.sh test.mp4 7 | # Usage：dffmpeg.sh test.mp4 -c:v mpeg4 -b:v 1M 8 | # TODO：修复奇怪的bug：ffmpeg还在运行但已经执行了后面的touch语句 9 | 10 | ###配置项 11 | storage_node="hk.gcc.ac.cn" 12 | storage_node_ssh_port=22 13 | compute_node=("us.gcc.ac.cn" "hk.gcc.ac.cn" "cn.gcc.ac.cn") # 计算节点 14 | compute_node_ssh_port=(10022 22 22) # 计算节点的ssh端口 15 | compute_node_weight=(10 50 15) # 计算节点的权重 16 | nfs_path=/srv/distributed_ffmpeg_transcoding_shared_files #共享目录 17 | sync_wait_time=0 # 为解决树莓派集群上出现的奇怪BUG（ffmpeg还在运行但已经执行了后面的touch语句）而设置的参数。根据不同权重的不同，需要设置不同的值，需要实测。合理设置权重可以减少该值。该值大小可能为30。 18 | ###配置项结束 19 | 20 | upload_path=$nfs_path/upload 21 | tmp_path=$nfs_path/tmp 22 | download_path=$nfs_path/download 23 | input_file=$1 24 | ffmpeg_output_parameter=${@:2} 25 | 26 | # display函数，输出彩色 27 | ECHO=`which echo` 28 | display(){ 29 | local type=$1 30 | local msg=${@:2} 31 | if [[ $type = "[Info]" ]]; then 32 | $ECHO -e "\\033[1;36;40m[Info] $msg \\033[0m" 33 | elif [[ $type = "[Error]" ]]; then 34 | $ECHO -e "\\033[1;31;40m[Error] $msg \\033[0m" 35 | elif [[ $type = "[Exec]" ]]; then 36 | $ECHO -e "\\033[1;33;40m[Exec] $msg \\033[0m" 37 | elif [[ $type = "[Success]" ]]; then 38 | $ECHO -e "\\033[1;32;40m[Success] $msg \\033[0m" 39 | else 40 | $ECHO -e $@ 41 | fi 42 | } 43 | 44 | ### 开始函数重载 45 | # 感谢@yurenchen000 传授这种神奇的写法 46 | # 重载cp，记录log 47 | CP=`which cp` 48 | cp(){ 49 | local src=$1 50 | local dst=$2 51 | display [Exec] cp ${@:1} 52 | $CP ${@:1} 53 | } 54 | # 重载rm，记录log 55 | RM=`which rm` 56 | rm(){ 57 | display [Exec] rm ${@:1} 58 | $RM ${@:1} 59 | } 60 | # 重载ssh，记录log 61 | SSH=`which ssh` 62 | ssh(){ 63 | display [Exec] ssh ${@:1} 64 | $SSH ${@:1} 65 | } 66 | ### 函数重载完毕 67 | 68 | # 检查输入文件 69 | if [ -f $input_file ] 70 | then 71 | display [Info] Input: $input_file 72 | display [Info] FFmpeg output parameter: $ffmpeg_output_parameter 73 | filename=$(date +%s) # 用时间戳做文件名 74 | display [Info] Uploading file, please wait a while. Temporary filename: $filename 75 | cp $input_file $upload_path/$filename 76 | else 77 | display [Error] Input error! 78 | exit 79 | fi 80 | 81 | # 计算计算节点总权重 82 | total_weight=0 83 | for i in ${compute_node_weight[*]} 84 | do 85 | total_weight=$[$total_weight + $i] 86 | done 87 | display [Info] Compute node total weight: $total_weight 88 | 89 | # 分发任务 90 | video_length=$(ffprobe -show_format $input_file -loglevel error| grep duration | awk -F = '{printf $2}') 91 | part_start=0 92 | part_end=0 93 | node_number=${#compute_node[*]} 94 | # for i in {0..${#compute_node[*]}} # 不知为啥不能这样写 95 | for ((i=0; i<$node_number; i++)) 96 | do 97 | # echo ${compute_node[$i]},${compute_node_weight[$i]} # 显示计算节点及其权重 98 | part_end=$(echo "scale=2; $part_start + $video_length * ${compute_node_weight[$i]} / $total_weight" | bc ) 99 | display [Info] Compute node ["${compute_node[$i]}"] : start[$part_start] , end[$part_end] 100 | # ssh ${compute_node[$i]} -p ${compute_node_ssh_port[$i]} "ffmpeg -ss $part_start -i $upload_path/$filename -to $part_end $ffmpeg_output_parameter $tmp_path/${filename}_$i.mp4 -loglevel error; touch $tmp_path/${filename}_$i.txt" & # -ss在前面，The input will be parsed using keyframes, which is very fast. 但可能会造成视频部分片段重复。 101 | ssh ${compute_node[$i]} -p ${compute_node_ssh_port[$i]} "ffmpeg -i $upload_path/$filename -ss $part_start -to $part_end $ffmpeg_output_parameter $tmp_path/${filename}_$i.mp4 -loglevel error; touch $tmp_path/${filename}_$i.txt" & # -ss在后面，速度会变慢，但是不会造成视频片段重复 102 | part_start=$part_end 103 | echo "file '${filename}_$i.mp4'" >> $tmp_path/${filename}_filelist.txt 104 | done 105 | 106 | # 不断检查任务是否完成 107 | sleep 1 108 | display [Info] Checking if the tasks are completed. 109 | while : 110 | do 111 | for ((i=0; i<$node_number; i++)) 112 | do 113 | if [ -f $tmp_path/${filename}_$i.txt ] 114 | then 115 | if [ $i==$[$node_number - 1] ] # 如果全部完成了 116 | then 117 | break 2 118 | else 119 | continue 120 | fi 121 | else 122 | break 123 | fi 124 | done 125 | sleep 1 126 | display ".\c" 127 | done 128 | display ! 129 | 130 | # 进行视频拼接 131 | sleep $sync_wait_time 132 | display [Info] Tasks all completed! Start to join them. 133 | ssh $storage_node -p $storage_node_ssh_port "ffmpeg -f concat -i $tmp_path/${filename}_filelist.txt -c copy $download_path/$filename.mp4 -loglevel error" 134 | 135 | #清除临时文件和上传的文件 136 | display [Info] Clean temporary files. 137 | rm -r $tmp_path/${filename}* 138 | rm $upload_path/${filename} 139 | 140 | display [Finish] Mission complete! Output path: [$download_path/$filename.mp4] 141 | 142 | 143 | # ffmpeg常用命令。参考 https://www.cnblogs.com/frost-yen/p/5848781.html 144 | 145 | #ffprobe -v error -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 test.mp4 # 计算帧数量，参考 https://stackoverflow.com/questions/2017843/fetch-frame-count-with-ffmpeg 146 | 147 | # 截取视频，参考 https://trac.ffmpeg.org/wiki/Seeking 148 | #ffmpeg -ss 00:01:00 -i test.mp4 -to 00:02:00 -c copy cut.mp4 149 | #ffmpeg -ss 1 -i test.mp4 -to 2 -c copy cut.mp4 150 | #ffmpeg -ss 1 -i test.mp4 -t 1 -c copy -copyts cut.mp4 151 | # 获取视频长度 152 | #ffprobe -show_format test_video.mp4 | grep duration | awk -F = '{printf $2}' > /tmp/1.txt 153 | 154 | # 合并视频 https://blog.csdn.net/doublefi123/article/details/47276739 155 | -------------------------------------------------------------------------------- /dffmpeg_result.mp4: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/chn-lee-yumi/distributed_ffmpeg_transcoding_cluster/1537eca195dd08d38b261e30c958cf290928f10f/dffmpeg_result.mp4 -------------------------------------------------------------------------------- /test_video.mp4: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/chn-lee-yumi/distributed_ffmpeg_transcoding_cluster/1537eca195dd08d38b261e30c958cf290928f10f/test_video.mp4 --------------------------------------------------------------------------------