node.js ffmpeg

https://www.ffmpeg.org/ffmpeg.html

FFMPEG详解

FFMPEG使用参数详解

QuickTime: Sample files

進階編碼設定

ffmpeg/avconv 常用參數
Child Process#
http://nodejs.org/api/child_process.html#child_process_child_process_exec_command_options_callback


nodejs使用ffmpeg转换视屏
http://fred.easymorse.com/?p=1216

MP4 Files
http://download.wavetlan.com/SVV/Media/HTTP/http-mp4.htm


其實C函式庫中已經宣告好3個FILE *的指標，分別是stdin、stdout、stderr。
stdin standard input 標準輸入串流
stdout standard output 標準輸出串流
stderr standard error 輸出串流且系統會留下紀錄檔

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说说Node.js child_process模块中的spawn和exec方法

wget from google drive

https://drive.google.com/file/d/fileID/edit?usp=sharing
wget --no-check-certificate https://googledrive.com/host/fileID -O FILENAME

注意! 連結共用 需 開啟 (網路上所有人均可找到存取)
https://drive.google.com/file/d/0B8p3dPzRohcnZUw4M0RqVjkxUE0/view?usp=sharing
https://docs.google.com/file/d/0B8p3dPzRohcnZUw4M0RqVjkxUE0/edit
ex: wget --no-check-certificate https://googledrive.com/host/0B8p3dPzRohcnZUw4M0RqVjkxUE0 -O media.mp4

Duplicate outputs

ffmpeg -i input\
 -s 1280x720 -acodec … -vcodec … output1 \
 -s 640x480 -acodec … -vcodec … output2 \
 -s 320x240 -acodec … -vcodec … output3

ffmpeg -i 0B8p3dPzRohcndXRaNm1OamFXUUE.mp4 -pass 1 -vcodec libx264 -b:v 100 -bt 100 -threads 0 -qmin 10 -qmax 31 -g 30 -s 640x360 -b:v 600k -ab 56k -ac 2 a.mp4  -s 640x360 -b 600k -ab 56k -ac 2 b.mp4 

ffmpeg Progress Bar - Encoding Percentage in PHP

  Duration: 00:01:14.13, start: 0.000000, bitrate: 864 kb/s

利用Duration 為總完成時間計算

How to extract frame size and length from ffmpeg, in php?

encoding-webm-using-ffmpeg