Fixes a few things to make testing encoding quicker.

config.json

@@ -1,18 +1,19 @@
 [
   {
   "Format": "mp4",
-  "Scale": "1280:720",
-  "Resize": true,
+  "Scale": "1920:1080",
+  "Resize": false,
   "VideoBitrate": 900,
   "AudioBitrate": 192,
-  "Speed": "veryfast",
+  "VideoCodec": "libx264",
+  "Preset": "veryfast",
   "CleanFilename": false,
-  "CRF": 20,
+  "CRF": 30,
   "FPS": 30,
   "Tune": "animation",
-  "Input": "*.mp4",
-  "OutDir": "renders",
-  "Passes": 3,
+  "Input": "LGo*.mp4",
+  "OutDir": "mp4_test",
+  "Passes": 1,
   "Extras": [
       "-movflags", "faststart",
       "-tune", "animation"
@@ -20,59 +21,22 @@
   },
   {
   "Format": "webm",
-  "VideoBitrate": 600,
-  "Scale": "1280:720",
-  "Resize": true,
   "VideoCodec": "libvpx-vp9",
-  "AudioBitrate": 192,
-  "AudioCodec": "libopus",
-  "Speed": "veryfast",
-  "CleanFilename": false,
-  "CRF": 20,
-  "FPS": 30,
-  "Tune": "animation",
-  "Input": "*.mp4",
-  "OutDir": "renders",
-  "Passes": 2,
-  "Extras": [
-   ]
-  },
-  {
-  "Format": "mp4",
   "Scale": "1920:1080",
   "Resize": false,
   "VideoBitrate": 900,
   "AudioBitrate": 192,
-  "Speed": "veryfast",
   "CleanFilename": false,
-  "CRF": 20,
+  "CRF": 30,
   "FPS": 30,
   "Tune": "animation",
-  "Input": "*.mp4",
-  "OutDir": "renders",
-  "Passes": 3,
+  "Input": "LGo*.mp4",
+  "OutDir": "webm_test",
+  "Passes": 1,
   "Extras": [
-      "-movflags", "faststart",
-      "-tune", "animation"
+    "-deadline", "realtime",
+    "-row-mt", "1",
+    "-cpu-used", "8"
     ]
-  },
-  {
-  "Format": "webm",
-  "Scale": "1920:1080",
-  "Resize": false,
-  "VideoBitrate": 600,
-  "VideoCodec": "libvpx-vp9",
-  "AudioBitrate": 192,
-  "AudioCodec": "libopus",
-  "Speed": "veryfast",
-  "CleanFilename": false,
-  "CRF": 20,
-  "FPS": 30,
-  "Tune": "animation",
-  "Input": "*.mp4",
-  "OutDir": "renders",
-  "Passes": 2,
-  "Extras": [
-   ]
   }
 ]

config/settings.go

@@ -15,7 +15,7 @@ type VideoOpts struct {
   VideoCodec string
   AudioBitrate int
   AudioCodec string
-  Speed string
+  Preset string
   CleanFilename bool
   CRF int
   FPS int
@@ -30,14 +30,14 @@ type VideoOpts struct {
 
 type Settings struct {
   Debug int
-  Progress bool
+  Force bool
   ConfigPath string
   Encodings []VideoOpts
 }
 
 func ParseFlags(c *Settings) {
   flag.IntVar(&c.Debug, "debug", 0, "1=print the ffmpeg command, 2=and its stderr output")
-  flag.BoolVar(&c.Progress, "progress", false,  "Show percent progress.  Not accurate (thanks ffmpeg)")
+  flag.BoolVar(&c.Force, "force", false,  "Force the render even if the file exists.")
   flag.StringVar(&c.ConfigPath, "config", "config.json",  "config.json to load")
 
   flag.Parse()

main.go

@@ -33,7 +33,10 @@ func Run(encoding config.VideoOpts, pass int, pid int, input string, output stri
     "-pix_fmt", "yuv420p",
     "-pass", fmt.Sprint(pass),
     "-passlogfile", fmt.Sprintf("ffmpeg2pass-%x.log", pid),
-    "-preset", encoding.Speed,
+  }
+
+  if encoding.Preset != "" {
+    extras = append(extras, "-preset", encoding.Preset)
   }
 
   if encoding.Resize {
@@ -94,7 +97,7 @@ func RenderFile(encoding config.VideoOpts, pid int, path string, target string)
   Run(encoding, encoding.Passes, pid, path, target)
 }
 
-func RenderToDir(encoding config.VideoOpts) {
+func RenderToDir(encoding config.VideoOpts, force bool) {
   matches, err := filepath.Glob(encoding.Input)
   if err != nil { log.Fatalf("%v", err) }
 
@@ -105,7 +108,7 @@ func RenderToDir(encoding config.VideoOpts) {
 
     _, err := os.Stat(target)
 
-    if err != nil {
+    if err != nil || force {
       fmt.Println("--- PATH", path, "->", target)
       RenderFile(encoding, rand.Int(), path, target)
     } else {
@@ -119,7 +122,7 @@ func main() {
 
   for _, encoding := range settings.Encodings {
     if encoding.OutDir != "" {
-      RenderToDir(encoding)
+      RenderToDir(encoding, settings.Force)
     } else {
       log.Fatal("config file needs either Output or OutDir")
     }