FFplay filters support

docs/ffplay.md

@@ -3,9 +3,11 @@ You can play any supported media with FFplay. These functions allow you to open
 ---
 
 ```scala
-def execplay(input: String, args: List[String] = List(), quiet: Boolean = true, exec: String = "ffplay"): Int
+def execplay(input: String, args: List[String] = List(), filters: List[String] = List(), quiet: Boolean = true, exec: String = "ffplay"): Int
 ```
-Executes FFplay to play back the media located in the path ```input```. The args that go here are the ones you generate with the functions seen here.
+Executes FFplay to play back the media located in the path ```input```. The ```args``` that go here are the ones you generate with the functions seen here.
+
+You can also pass common FFmpeg video and audio filters to FFplay through ```filters```.
 
 ---
 
@@ -107,4 +109,4 @@ Sets the seek interval for when you seek using the left and right arrow keys.
 ```scala
 def enableHWaccel(): List[String]
 ```
-Enables hardware acceleration for playback.
+Enables hardware acceleration for playback.

src/ffmpeg.scala

@@ -62,24 +62,12 @@ hwaccel: String = "", quiet: Boolean = true, exec: String = "ffmpeg"
   if !isAlright then
     -1
   else
-    val filterlist = processFilters(filters)
-    val filters_v =
-      if filterlist(0).length > 0 then
-        List("-filter:v", filterlist(0))
-      else
-        List()
-    val filters_a =
-      if filterlist(1).length > 0 then
-        List("-filter:a", filterlist(1))
-      else
-        List()
-    val nonfilters = getNonFilters(filters)
+    val filter_args = mkFilterArgs(filters)
     try
       val cmd: List[String] =
           getBaseArgs_hw(exec, quiet, hwaccel)
           ++ List("-i", input)
-          ++ args ++ filters_v ++ filters_a
-          ++ nonfilters :+ output
+          ++ args ++ filter_args :+ output
       cmd.!
     catch
       case e: Exception => -1

src/ffplay/ffplay.scala

@@ -6,14 +6,15 @@ import ffscala.misc.*
 
 //FFplay functionality to play media
 
-def execplay(input: String, args: List[String] = List(), quiet: Boolean = true, exec: String = "ffplay"): Int =
+def execplay(input: String, args: List[String] = List(), filters: List[String] = List(), quiet: Boolean = true, exec: String = "ffplay"): Int =
   if File(input).isFile() == true then
     try
+      val filter_args = mkFilterArgs(filters)
       val cmd =
         if quiet then
-          List(exec, "-loglevel", "quiet", input) ++ args
+          List(exec, "-loglevel", "quiet", input) ++ args ++ filter_args
         else
-          List(exec, "-hide_banner", input)
+          List(exec, "-hide_banner", input) ++ args ++ filter_args
       cmd.!
     catch
       case e: Exception => -1
@@ -121,4 +122,4 @@ def setSeekInterval(interval: Float): List[String] =
   else
     List("-seek_interval", interval.toString)
 
-def enableHWaccel(): List[String] = List("-hwaccel")
+def enableHWaccel(): List[String] = List("-hwaccel")

src/misc_encode.scala

@@ -1,6 +1,22 @@
 package ffscala.misc
 
-def processFilters(filters: List[String], vf: String = "", af: String = "", i: Int = 0): List[String] =
+def mkFilterArgs(filters: Seq[String]): List[String] =
+  val filterlist = processFilters(filters)
+  val nonfilters = getNonFilters(filters)
+  val filters_v =
+    if filterlist(0).length > 0 then
+      List("-vf", filterlist(0))
+    else
+      List()
+  val filters_a =
+    if filterlist(1).length > 0 then
+      List("-af", filterlist(1))
+    else
+      List()
+
+  filters_v ++ filters_a ++ nonfilters
+
+def processFilters(filters: Seq[String], vf: String = "", af: String = "", i: Int = 0): List[String] =
   val comma =
     if i >= filters.length-2 then
       ""
@@ -15,7 +31,7 @@ def processFilters(filters: List[String], vf: String = "", af: String = "", i: I
   else
     processFilters(filters, vf, af, i+1)
 
-def getNonFilters(filters: List[String], nf: List[String] = List(), i: Int = 0): List[String] =
+def getNonFilters(filters: Seq[String], nf: List[String] = List(), i: Int = 0): List[String] =
   if i >= filters.length then
     nf
   else if filters(i) == "v" || filters(i) == "a" then