{"action":"created","comment":{"url":"https://api.github.com/repos/amiaopensource/ffmprovisr/pulls/comments/243649334","pull_request_review_id":187483427,"id":243649334,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDI0MzY0OTMzNA==","diff_hunk":"@@ -781,6 +781,35 @@ <h3>Examples</h3>\n     </div>\n     <!-- ends Crop video -->\n \n+    <!-- Change video colour to black and white -->\n+    <label class=\"recipe\" for=\"col_change\">Change video colour to black and white</label>\n+    <input type=\"checkbox\" id=\"col_change\">\n+    <div class=\"hiding\">\n+      <h3>Change video colour to black and white</h3>\n+      <p><code>ffmpeg -i <em>input_file</em> -filter_complex hue=s=0 -c:a copy <em>output_file</em></code></p>\n+      <p>A basic command to alter colour hue to black and white using filter_complex (credit @FFMPEG via Twitter).</p>\n+      <dl>\n+        <dt>ffmpeg</dt><dd>starts the command</dd>\n+        <dt>-i <em>input_file</em></dt><dd>path, name and extension of the input file</dd>\n+        <dt>-filter_complex hue=s=0</dt><dd>uses filter_complex command to set the hue to black and white</dd>\n+        <dt>-c:a copy</dt><dd>copies the encode settings of the input_file to the output_file</dd>\n+        <dt><em>output_file</em></dt><dd>path, name and extension of the output_file</dd>\n+      </dl>\n+      <p>An alternative that preserves interlacing information for a prores 422hq file generated, for example, from a tape master (credit Dave Rice):</p>\n+      <p><code>ffmpeg -i <em>input_file</em> -c:v prores_ks -flags +ildct+ilme -map 0 -c:a copy -profile:v 3 -vf hue=s=0 <em>output_file</em></code></p>\n+      <dl>\n+        <dt>ffmpeg</dt><dd>starts the command</dd>\n+        <dt>-i <em>input_file</em></dt><dd>path, name and extension of the input file</dd>\n+        <dt>-c:v prores_ks</dt><dd>encodes the video to ProRes (prores_ks marks the stream as interlaced, unlike prores)</dd>\n+        <dt>-flags +ildct+ilme</dt><dd>ensures that the output_file has interlaced field encoding, using interlace aware discrete cosine transform and interlace aware motion estimation</em></dd>","path":"index.html","position":24,"original_position":24,"commit_id":"3934d85f54384621d32c782035b6503e34f2f7fd","original_commit_id":"3934d85f54384621d32c782035b6503e34f2f7fd","user":{"login":"retokromer","id":3246607,"node_id":"MDQ6VXNlcjMyNDY2MDc=","avatar_url":"https://avatars2.githubusercontent.com/u/3246607?v=4","gravatar_id":"","url":"https://api.github.com/users/retokromer","html_url":"https://github.com/retokromer","followers_url":"https://api.github.com/users/retokromer/followers","following_url":"https://api.github.com/users/retokromer/following{/other_user}","gists_url":"https://api.github.com/users/retokromer/gists{/gist_id}","starred_url":"https://api.github.com/users/retokromer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/retokromer/subscriptions","organizations_url":"https://api.github.com/users/retokromer/orgs","repos_url":"https://api.github.com/users/retokromer/repos","events_url":"https://api.github.com/users/retokromer/events{/privacy}","received_events_url":"https://api.github.com/users/retokromer/received_events","type":"User","site_admin":false},"body":"No 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