在代码中利用ffmpeg命令行，生成gif动态图片

C#代码：

public IEnumerator mixGIF(){Debug.Log ("mixGIF");gifName="Prefabs [current].name";path="Assets/../StreamingAssets/effectAttackScreenshot/";System.Diagnostics.ProcessStartInfo proc = new System.Diagnostics.ProcessStartInfo ();proc.FileName = "/bin/bash";proc.UseShellExecute = false;proc.RedirectStandardOutput = true;proc.CreateNoWindow = true;proc.Arguments = string.Format ("Assets/unreal_bundle/Controller/EffectAttackController/shell/generateGIF.sh {0}{1}/gif%d.jpg {2}GIF/{3}.gif", path, gifName, path, gifName);System.Diagnostics.Process p = System.Diagnostics.Process.Start (proc);p.WaitForExit ();p.Close ();yield return 1;}

generateGIF.sh文件：

#!/bin/bash#palette="/tmp/palette.png"#filters="fps=15,scale=220:-1:flags=lanczos"#setpts=0.5*PTS#paletteops="stats_mode=diff:dither=none"#/usr/local/bin/ffmpeg -v warning -i $1 -vf "$filters,palettegen" -y $palette#/usr/local/bin/ffmpeg -v warning -i $1 -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" -y $2#/usr/local/bin/ffmpeg -i $2 -i $3 -filter_complex '[1:v]scale=100:40[s];[0:v][s]overlay=main_w-overlay_w:main_h-overlay_h' -y $2palette="/tmp/palette.png"filters="fps=15,scale=440:-1:flags=lanczos"#paletteops="stats_mode=diff:dither=none"/usr/local/bin/ffmpeg -y -v warning -i $1 -vf "$filters,palettegen" -y $palette/usr/local/bin/ffmpeg -y -v warning -i $1 -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" -y $2