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--- public:ffmpeg-based_interval_timer_for_sport_and_exercise [2018/02/07 02:44] – [Example output] fangfufu
+++ public:ffmpeg-based_interval_timer_for_sport_and_exercise [2018/03/31 00:38] (current) – external edit 127.0.0.1
@@ Line 5: / Line 5: @@
 After digging through FFmpeg documentation [(https://trac.ffmpeg.org/wiki)] and the Internet, I figured out how to generate a text-based video.
-Here I present the program listing, and an example output. The script works fine on Debian Stretch.
 I have to say FFmpeg is one of my most abused software. Last time I used FFmpeg to upload arbitrary file to Youtube [(https://github.com/fangfufu/Matlab-Data-Video-Converter)].
-===== Program listing =====
-<code bash>
-#!/bin/bash
-# The file number counter
-let counter=0
-function cleanup {
-    rm seg-*.mp4 filelist.txt
-}
-# Calling convention: duration, font size, text
-function introduction {
-    ffmpeg -f lavfi -i color=c=white:size=1280x720:rate=30 \
-    -vf "drawtext=text='${3}': fontsize=${2}: \
-    r=30: x=(w-tw)/2: y=h-h*0.9: fontcolor=black:" \
-    -t ${1} -preset slow -tune stillimage -y \
-    seg-${counter}.mp4
-    echo "file seg-${counter}.mp4" >> filelist.txt
-    let counter++
-}
-# Calling convention: duration, text
-function segment {
-    let min=$1/60
-    let sec=$1-${min}*60
-    ffmpeg -f lavfi -i color=c=white:size=1280x720:rate=30 \
-    -vf "drawtext=text='${2}': fontsize=80: \
-    r=30: x=(w-tw)/2: y=h-h*0.75: fontcolor=black:,\
-    drawtext=text='Duration: ${min} min ${sec} sec': fontsize=80: \
-    r=30: x=(w-tw)/2: y=h-h*0.5: fontcolor=black:,
-    drawtext=timecode='00\:00\:00\:00': fontsize=80: \
-    r=30: x=(w-tw)/2: y=h-h*0.25: fontcolor=black:" \
-    -t ${1} -preset slow -tune stillimage -y \
-    seg-${counter}.mp4
-    echo "file seg-${counter}.mp4" >> filelist.txt
-    let counter++
-}
-function output {
-    ffmpeg -f concat -i filelist.txt -c copy -y ${1}
-    cleanup
-}
-cleanup
-############################################################################
-# -- Insert your session introduction here --                              #
-# Make sure the font is big enough! You might want to test out the         #
-# introduction generation first by commenting out the main set             #
-# Calling convention:                                                      #
-# introduction $DURATION $FONTSIZE $TEXT                                   #
-############################################################################
-introduction 10 40 "
-Threshold session:
-W/U - 5 minutes easy, gradually build up
-mins at 10 mile TT effort
-seconds sprint
-mins easy
-mins at 10 mile TT effort
-seconds sprint
-mins easy
-mins 10 mile TT effort
-seconds sprint
-Warm down for 5 mins, easy spinning
-"
-############################################################################
-# -- Insert your main set here. --                                         #
-# You might want to test out the introduction generation before generating #
-# these video.                                                             #
-# Calling convention:                                                      #
-# segment $DURATION $TEXT                                                  #
-############################################################################
-segment 300 "Easy, gradually build up"
-segment 600 "10 mile TT effort"
-segment 15  "Sprint"
-segment 600 "Easy"
-segment 600 "10 mile TT effort"
-segment 20  "Sprint"
-segment 600 "Easy"
-segment 600 "10 mile TT effort"
-segment 25  "Sprint"
-segment 300 "Cool down"
-output UEA-Triathlon-2018-02-07.mp4
+You can download it at [[https://github.com/fangfufu/make_interval_timer_video]].
-</code>
 ===== Example output =====