require mediastat for video processing, increase muxq

docker/app/Dockerfile

@@ -7,11 +7,12 @@ RUN apt-get update; \
     wget -qO - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -; \
     wget -qO - https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -; \
     apt-get update; \
-    apt-get -qq -y install inotify-tools postgresql-client build-essential git ffmpeg nodejs libmagic-dev libpng-dev gifsicle optipng libjpeg-progs librsvg2-bin; \
+    apt-get -qq -y install inotify-tools postgresql-client build-essential git ffmpeg libavformat-dev libavcodec-dev nodejs libmagic-dev libpng-dev gifsicle optipng libjpeg-progs librsvg2-bin; \
     cd /tmp; \
     git clone https://github.com/derpibooru/cli_intensities; \
-    cd cli_intensities; \
-    make install; \
+    git clone https://github.com/derpibooru/mediatools; \
+    (cd cli_intensities && make install); \
+    (cd mediatools && make install); \
     mix local.hex --force; \
     mix local.rebar --force
 

lib/philomena/analyzers/webm.ex

@@ -1,57 +1,29 @@
 defmodule Philomena.Analyzers.Webm do
   def analyze(file) do
+    stats = stats(file)
+
     %{
       extension: "webm",
       mime_type: "video/webm",
       animated?: true,
-      duration: duration(file),
-      dimensions: dimensions(file)
+      duration: stats.duration,
+      dimensions: stats.dimensions
     }
   end
 
-  defp duration(file) do
-    with {output, 0} <-
-           System.cmd("ffprobe", [
-             "-i",
-             file,
-             "-show_entries",
-             "format=duration",
-             "-v",
-             "quiet",
-             "-of",
-             "csv=p=0"
-           ]),
-         {duration, _} <- Float.parse(output) do
-      duration
-    else
-      _ ->
-        0.0
-    end
-  end
-
-  defp dimensions(file) do
-    System.cmd("ffprobe", [
-      "-i",
-      file,
-      "-show_entries",
-      "stream=width,height",
-      "-v",
-      "quiet",
-      "-of",
-      "csv=p=0"
-    ])
-    |> case do
+  defp stats(file) do
+    case System.cmd("mediastat", [file]) do
       {output, 0} ->
-        [width, height] =
+        [_size, _frames, width, height, num, den] =
           output
           |> String.trim()
-          |> String.split(",")
+          |> String.split(" ")
           |> Enum.map(&String.to_integer/1)
 
-        {width, height}
+        %{dimensions: {width, height}, duration: num / den}
 
-      _error ->
-        {0, 0}
+      _ ->
+        %{dimensions: {0, 0}, duration: 0.0}
     end
   end
 end

lib/philomena/processors/webm.ex

@@ -112,6 +112,8 @@ defmodule Philomena.Processors.Webm do
         scale_filter,
         "-threads",
         "1",
+        "-max_muxing_queue_size",
+        "512",
         webm
       ])
 
@@ -138,6 +140,8 @@ defmodule Philomena.Processors.Webm do
         scale_filter,
         "-threads",
         "1",
+        "-max_muxing_queue_size",
+        "512",
         mp4
       ])
 
@@ -148,7 +152,7 @@ defmodule Philomena.Processors.Webm do
     gif = Briefly.create!(extname: ".gif")
     scale_filter = "scale=w=#{width}:h=#{height}:force_original_aspect_ratio=decrease"
     palette_filter = "paletteuse=dither=bayer:bayer_scale=5:diff_mode=rectangle"
-    rate_filter = "fps=1/#{duration / 10},settb=1/2,setpts=N"
+    rate_filter = "setpts=N/TB/2"
     filter_graph = "[0:v] #{scale_filter},#{rate_filter} [x]; [x][1:v] #{palette_filter}"
 
     {_output, 0} =