add screen capture command

Author: psklf

videorip/ffmpeg/ripffmpeg.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/sh
+ffmpeg -analyzeduration 100M -probesize 100M -i main.VOB -codec:v libx264 -b_strategy 2 -crf 18 -me_method umh  -x264opts deblock=-4:subme=11:no-fast-pskip=1:no-dct-decimate=1 -tune grain main.264

videorip/ffmpeg/screencapture.md

@@ -1,12 +1,10 @@
-Analyse video
-
+With frame num and type:
 ```
-ffprobe  main.VOB -select_streams v   -show_frames | grep -E 'pict_type|coded_picture_number|pkt_pts_time' > allframes.txt
-
+ffmpeg -analyzeduration 1024M -probesize 2048M -i demux/00001.track_4113.264 \
+           -vf "drawtext=fontfile='/usr/share/fonts/urw-base35/NimbusSans-Regular.t1': \
+text='frame %{frame_num} pic type %{pict_type}^Lsource': \
+x=20:y=20: fontcolor=white: fontsize=30: box=1: boxcolor=black: boxborderw=5" -c:v libx264 -qp 0 srctemp.264
 ```
-Sometimes need offset frame num.
-
-
 
 ```
 ffmpeg -analyzeduration 100M -probesize 100M -i Ermo.1994.DVDRip.x264.AC3-psklf.mkv -f image2 -vf "select='eq(n\,20000)+eq(n\,30000)+eq(n\,40000)'",showinfo -vsync 0 -frames:v 3 encodenew%3d.png
@@ -18,5 +16,15 @@ With image size control
 ffmpeg -analyzeduration 100M -probesize 100M -i main.VOB  -f image2 -vf "select='eq(n\,20000)+eq(n\,40000)+eq(n\,13613)',scale=1024:576",showinfo -vsync 0 -frames:v 3 source%3d.png
 
 ```
+Analyse video
+
+```
+ffprobe  main.VOB -select_streams v   -show_frames | grep -E 'pict_type|coded_picture_number|pkt_pts_time' > allframes.txt
+
+```
+Sometimes need offset frame num.
+
+
+