ATS-812: PoC FFmpeg skeleton - experiments

- add PoC option to convert from mp4 to either image/png or image/png
- single frame based on timeOffset param (example format "00:00:00.5")
- transform option names & support mimetypes subject to change
- requires detailed design + (unit) regression tests

- see also MM-156

alfresco-transform-ffmpeg/alfresco-transform-ffmpeg-boot/src/main/resources/templates/transformForm.html

@@ -10,6 +10,8 @@
 				<tr><td><div style="text-align:right">timeout</div></td><td><input type="text" name="timeout" value="" /></td></tr>
 				<tr><td><div style="text-align:right">testDelay</div></td><td><input type="text" name="testDelay" value="" /></td></tr>
 
+				<tr><td><div style="text-align:right">timeOffset</div></td><td><input type="text" name="timeOffset" value="" /></td></tr>
+
 				<tr><td></td><td><input type="submit" value="Transform" /></td></tr>
 			</table>
 		</form>

alfresco-transform-ffmpeg/alfresco-transform-ffmpeg-boot/src/test/resources/ffmpeg_engine_config.json

@@ -1,12 +1,20 @@
 {
   "transformOptions": {
+    "ffmpegOptions": [
+      {"value": {"name": "timeOffset"}}
+    ]
   },
   "transformers": [
     {
       "transformerName": "ffmpeg",
       "supportedSourceAndTargetList": [
         {"sourceMediaType": "video/mp4",                                  "targetMediaType": "video/avi" },
-        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "audio/mpeg" }
+        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "audio/mpeg" },
+        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "image/png" },
+        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "image/jpeg" }
+      ],
+      "transformOptions": [
+        "ffmpegOptions"
       ]
     }
   ]

alfresco-transform-ffmpeg/alfresco-transform-ffmpeg/src/main/java/org/alfresco/transformer/FFmpegOptionsBuilder.java

@@ -2,7 +2,7 @@
  * #%L
  * Alfresco Transform Core
  * %%
- * Copyright (C) 2005 - 2020 Alfresco Software Limited
+ * Copyright (C) 2005 - 2021 Alfresco Software Limited
  * %%
  * This file is part of the Alfresco software.
  * -
@@ -36,13 +36,38 @@ import java.util.StringJoiner;
 // TODO PoC for FFmpeg
 public final class FFmpegOptionsBuilder
 {
+    private String timeOffset;
+    private Integer framesNum;
+
     // TODO PoC - add FFmpeg options ...
     private FFmpegOptionsBuilder() {}
 
+    public FFmpegOptionsBuilder withTimeOffset(final String timeOffset)
+    {
+        this.timeOffset = timeOffset;
+        return this;
+    }
+
+    public FFmpegOptionsBuilder withFramesNum(final Integer framesNum)
+    {
+        this.framesNum = framesNum;
+        return this;
+    }
+
     public String build()
     {
         StringJoiner args = new StringJoiner(" ");
 
+        if (timeOffset != null)
+        {
+            args.add("-ss "+timeOffset);
+        }
+
+        if (framesNum != null)
+        {
+            args.add("-frames:v "+framesNum);
+        }
+
         return args.toString();
     }
 

alfresco-transform-ffmpeg/alfresco-transform-ffmpeg/src/main/java/org/alfresco/transformer/executors/FFmpegCommandExecutor.java

@@ -2,7 +2,7 @@
  * #%L
  * Alfresco Transform Core
  * %%
- * Copyright (C) 2005 - 2020 Alfresco Software Limited
+ * Copyright (C) 2005 - 2021 Alfresco Software Limited
  * %%
  * This file is part of the Alfresco software.
  * -
@@ -33,7 +33,9 @@ import java.io.File;
 import java.util.HashMap;
 import java.util.Map;
 
+import static org.alfresco.transformer.util.RequestParamMap.START_PAGE;
 import static org.alfresco.transformer.util.RequestParamMap.TIMEOUT;
+import static org.alfresco.transformer.util.RequestParamMap.TIME_OFFSET;
 import static org.alfresco.transformer.util.Util.stringToLong;
 
 /**
@@ -50,6 +52,8 @@ public class FFmpegCommandExecutor extends AbstractCommandExecutor
 
     private final String EXE;
 
+    private final int FRAMES_NUM_1 = 1;
+
     public FFmpegCommandExecutor(String exe)
     {
         if (exe == null || exe.isEmpty())
@@ -75,7 +79,7 @@ public class FFmpegCommandExecutor extends AbstractCommandExecutor
 
         // TODO PoC for FFmpeg - check against Gytheio: -y SPLIT:${sourceOptions} -i ${source} SPLIT:${targetOptions} ${target}
         commandsAndArguments.put(".*",
-            new String[]{EXE, "-y", "-i", "SPLIT:${options}", "${source}", "${target}"});
+              new String[]{EXE, "-y", "-i", "${source}", "SPLIT:${options}", "${target}"});
 
         runtimeExec.setCommandsAndArguments(commandsAndArguments);
 
@@ -103,9 +107,17 @@ public class FFmpegCommandExecutor extends AbstractCommandExecutor
                           Map<String, String> transformOptions,
                           File sourceFile, File targetFile) throws TransformException
     {
-        final String options = FFmpegOptionsBuilder
-                .builder()
-                .build();
+        FFmpegOptionsBuilder optionsBuilder = FFmpegOptionsBuilder.builder();
+
+        String timeOffset = transformOptions.get(TIME_OFFSET);
+        if (timeOffset != null)
+        {
+            // TODO check target mimetype (to be supported image formats) for "single frame" option
+            optionsBuilder.withTimeOffset(transformOptions.get(TIME_OFFSET));
+            optionsBuilder.withFramesNum(FRAMES_NUM_1);
+        }
+
+        final String options = optionsBuilder.build();
 
         Long timeout = stringToLong(transformOptions.get(TIMEOUT));
 

alfresco-transform-ffmpeg/alfresco-transform-ffmpeg/src/main/resources/ffmpeg_engine_config.json

@@ -1,6 +1,7 @@
 {
   "transformOptions": {
     "ffmpegOptions": [
+      {"value": {"name": "timeOffset"}}
     ]
   },
   "transformers": [
@@ -8,7 +9,9 @@
       "transformerName": "ffmpeg",
       "supportedSourceAndTargetList": [
         {"sourceMediaType": "video/mp4",                                  "targetMediaType": "video/avi" },
-        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "audio/mpeg" }
+        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "audio/mpeg" },
+        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "image/png" },
+        {"sourceMediaType": "video/mp4",                                  "targetMediaType": "image/jpeg" }
       ],
       "transformOptions": [
         "ffmpegOptions"

alfresco-transformer-base/src/main/java/org/alfresco/transformer/util/RequestParamMap.java

@@ -72,4 +72,7 @@ public interface RequestParamMap
     String INCLUDE_CONTENTS        = "includeContents";
     String NOT_EXTRACT_BOOKMARK_TEXT = "notExtractBookmarksText";
     String PAGE_LIMIT              = "pageLimit";
+
+    // TODO PoC for FFmpeg
+    String TIME_OFFSET             = "timeOffset";
 }