Changes between Version 5 and Version 6 of Debug/MacroblocksAndMotionVectors

Timestamp:

Jan 13, 2018, 1:23:49 PM (9 years ago)

Author:

Gyan

Comment:

shift obsolete sections to bottom - with avcodec major bump to 58, no longer available

Debug/MacroblocksAndMotionVectors

@@ -2 +2 @@
 
 You can use `ffmpeg` or `ffplay` to analyze the macroblocks / coding tree units and motion vectors in a video file. 
+
+== Analyzing Motion Vectors ==
+
+The [http://ffmpeg.org/ffmpeg-all.html#codecview `codecview` filter] can be used to show motion vectors as small arrows for each macroblock. It takes one option called `mv`, which specifies the type of motion vector to be drawn:
+
+* `pf` – forward predicted motion vectors of P pictures
+* `bf` – forward predicted motion vectors of B pictures
+* `bb` – backward predicted motion vectors of B pictures
+
+For example, you can use:
+{{{
+ffplay -flags2 +export_mvs input.mp4 -vf codecview=mv=pf+bf+bb
+ffmpeg -flags2 +export_mvs -i input.mp4 -vf codecview=mv=pf+bf+bb output.mp4
+}}}
+
+Example:
+
+[[Image(vismv_pf.png)]]
+
+Caveats: 
+* Earlier versions of ffmpeg do not have this filter, but support the now deprecated `-vismv` option.
+* This option does not work for codecs which do not export motion vectors (most non-MPEG based codecs)
+
+
+----
+
+
+'''The following sections apply to ffmpeg versions older than October 21 2017.''' 
 
 == Analyzing Macroblock Types ==
@@ -42 +70 @@
 
 [[Image(visqp.png)]]
-
-== Analyzing Motion Vectors ==
-
-The [http://ffmpeg.org/ffmpeg-all.html#codecview `codecview` filter] can be used to show motion vectors as small arrows for each macroblock. It takes one option called `mv`, which specifies the type of motion vector to be drawn:
-
-* `pf` – forward predicted motion vectors of P pictures
-* `bf` – forward predicted motion vectors of B pictures
-* `bb` – backward predicted motion vectors of B pictures
-
-For example, you can use:
-{{{
-ffplay -flags2 +export_mvs input.mp4 -vf codecview=mv=pf+bf+bb
-ffmpeg -flags2 +export_mvs -i input.mp4 -vf codecview=mv=pf+bf+bb output.mp4
-}}}
-
-Example:
-
-[[Image(vismv_pf.png)]]
-
-Caveats: 
-* Earlier versions of ffmpeg do not have this filter, but support the now deprecated `-vismv` option.
-* This option does not work for codecs which do not export motion vectors (most non-MPEG based codecs)