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--- public:ffmpeg-based_interval_timer_for_sport_and_exercise [2018/02/09 18:06] – fangfufu
+++ public:ffmpeg-based_interval_timer_for_sport_and_exercise [2018/02/15 10:30] – fangfufu
@@ 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 content of the set
-# Format:
-# min:sec text
-turbo=(
-#Warm up
-'05:00 90 RPM Smooth pedalling'
-'02:00 95 RPM Smooth pedalling'
-'02:00 100 RPM Smooth pedalling'
-'02:00 105 RPM Smooth pedalling'
-'01:30 110 RPM Smooth pedalling'
-'00:30 120-130 RPM Maintain form'
-'02:00 90 RPM Relax and recover'
-'00:06 MAX RPM Rev out'
-'01:00 90 RPM Smooth pedalling'
-'00:06 MAX RPM Rev out'
-'01:00 90 RPM Smooth pedalling'
-'00:06 MAX RPM Rev out'
-'02:45 90 RPM Relax and recover'
-#Russian Steps
-'00:15 Max effort'
-'00:45 Recovery'
-'00:30 Max effort'
-'00:30 Recovery'
-'00:45 Max effort'
-'00:15 Recovery'
-'01:00 Max effort'
-'01:00 Recovery'
-'00:45 Max effort'
-'00:15 Recovery'
-'00:30 Max effort'
-'00:30 Recovery'
-'00:15 Max effort'
-'05:45 Recovery'
-'00:15 Max effort'
-'00:45 Recovery'
-'00:30 Max effort'
-'00:30 Recovery'
-'00:45 Max effort'
-'00:15 Recovery'
-'01:00 Max effort'
-'01:00 Recovery'
-'00:45 Max effort'
-'00:15 Recovery'
-'00:30 Max effort'
-'00:30 Recovery'
-'00:15 Max effort'
-'05:45 Recovery'
-'00:15 Max effort'
-'00:45 Recovery'
-'00:30 Max effort'
-'00:30 Recovery'
-'00:45 Max effort'
-'00:15 Recovery'
-'01:00 Max effort'
-'01:00 Recovery'
-'00:45 Max effort'
-'00:15 Recovery'
-'00:30 Max effort'
-'00:30 Recovery'
-'00:15 Max effort'
-'10:00 Cool Down'
-)
-################################################################################
-resolution=1280x720
-framerate=30
-# The file number counter
-let counter=0
-# The length of the set
-let setLen=${#turbo[@]}-1
-function cleanup {
-    rm seg-*.mp4 filelist.txt intro.txt
-}
-# Calling convention: duration, font_size
-function introduction {
-    ffmpeg -f lavfi -i color=c=white:size=${resolution}:rate=${framerate} \
-    -vf "drawtext=textfile=intro.txt: fontsize=${2}: \
-    r=${framerate}: x=(w-tw)/2: y=h-h*0.9: fontcolor=black:" \
-    -t ${1} -preset ultrafast -tune stillimage -y -loglevel panic -stats \
-    seg-${counter}.mp4
-    echo "file seg-${counter}.mp4" >> filelist.txt
-    let counter++
-}
-# Calling convention: min, sec, text_now, text_next
-function videoSegment {
-    let duration=${1}*60+${2}
-    min=${1}
-    sec=${2}
-    textNow=${3}
-    textNext=$(echo "Next -" ${min}m ${sec}s ${4})
-    ffmpeg -f lavfi -i color=c=white:size=${resolution}:rate=${framerate} \
-    -vf "\
-    drawtext=text='${textNow}': fontsize=80: \
-    r=${framerate}: x=(w-tw)*0.5: y=h-h*0.80: fontcolor=Black:,\
-    \
-    drawtext=text='Duration: ${min} min ${sec} sec': fontsize=80: \
-    r=${framerate}: x=(w-tw)*0.5: y=h-h*0.60: fontcolor=Black:,
-    \
-    drawtext=timecode='00\:00\:00\:00': fontsize=80: \
-    r=${framerate}: x=(w-tw)*0.5: y=h-h*0.40: fontcolor=Black:, \
-    \
-    drawtext=text='${textNext}': fontsize=50: \
-    r=${framerate}: x=(w-tw)*0.5: y=h-h*0.20: fontcolor=SlateGray:" \
-    \
-    -t ${duration} -preset ultrafast -tune stillimage -y -loglevel panic -stats \
-    seg-${counter}.mp4
-    echo "file seg-${counter}.mp4" >> filelist.txt
-    let counter++
-}
-function output {
-    ffmpeg -f concat -i filelist.txt -c copy -y ${1}
-    cleanup
-}
-# Calling convention: segment_id
-function turboSegment {
-    thisLine=$(echo ${turbo[${1}]})
-    timing=$(echo $thisLine|cut -d ' ' -f 1)
-    min=$(echo $timing|cut -d ':' -f 1)
-    sec=$(echo $timing|cut -d ':' -f 2)
-    textNow=$(echo $thisLine|cut -d ' ' -f 2-)
-    let segNext=${1}+1
-    textNext=$(echo ${turbo[${segNext}]}|cut -d ' ' -f 2-)
-    videoSegment $min $sec "$textNow" "$textNext"
-}
-################################################################################
-cleanup
-# Create the introduction text variable
-printf "%s\n" "${turbo[@]}" > intro.txt
-# introduction 10 40
-# read -p "Press any key to continue, or Ctrl+C to stop..."
-for i in $(seq 0 $setLen); do
-    turboSegment ${i}
-done
-output UEA-Triathlon-$(date --rfc-3339=date).mp4
+You can download it at [[https://github.com/fangfufu/make_interval_timer_video]].
-</code>
 ===== Example output =====