Jesse Tan jessetan
jessetan
/ Grafana-InfluxDB-internals.json
Last active
April 7, 2016 11:52
Grafana 2.6 Dashboard for InfluxDB 0.10.3 _internal database
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| { | |
| "id": 7, | |
| "title": "InfluxDB internals", | |
| "originalTitle": "InfluxDB internals", | |
| "tags": [], | |
| "style": "dark", | |
| "timezone": "browser", | |
| "editable": true, | |
| "hideControls": false, | |
| "sharedCrosshair": false, |
jessetan
/ vidsidebyside.sh
Created
December 29, 2015 13:25
Place two videos side by side in new video using ffmpeg
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| #!/bin/bash | |
| ffmpeg -i test1.mp4 -vf "[in] scale=iw/2:ih/2, pad=2*iw:ih [left]; movie=test2.mp4, scale=iw/2:ih/2 [right]; [left][right] overlay=main_w/2:0 [out]" Output.mp4 |
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| // Add #include <execinfo.h> to includes | |
| // START STACK TRACE | |
| void* tracePtrs[100]; | |
| int count = backtrace( tracePtrs, 100 ); | |
| char** funcNames = backtrace_symbols( tracePtrs, count ); | |
| // Print the stack trace | |
| printf("Stack trace:\n"); | |
| for( int ii = 0; ii < count; ii++) { |
jessetan
/ calcavgbitrate.sh
Last active
October 25, 2023 13:43
Calculates average bitrate of a video file by looking at size of each frame. Uses ffprobe, sed and awk
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| #!/bin/bash | |
| # Calculates average bitrate of a video file by looking at size of each frame. Uses ffprobe, sed and awk | |
| if [ -z "$1" ]; then | |
| echo "Error: No input video file specified" | |
| exit 1 | |
| fi | |
| echo "Estimating bitrate statistics for $1..." ; ffprobe -show_frames -loglevel error $1 | \ |
jessetan
/ secondsToSMPTE.js
Last active
April 6, 2023 21:11
Convert seconds to SMPTE timecode JSON object and string
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| /** Convert seconds to SMPTE timecode JSON object, example input is html video.currentTime */ | |
| function secondsToSMPTE(seconds, framerate) { | |
| var f = Math.floor((seconds % 1) * framerate); | |
| var s = Math.floor(seconds); | |
| var m = Math.floor(s / 60); | |
| var h = Math.floor(m / 60); | |
| m = m % 60; | |
| s = s % 60; | |
| return {h: h, m: m, s: s, f: f}; |
jessetan
/ visbitrate.sh
Last active
August 29, 2015 14:08
Visualize video bitrate per frame + motion vectors + blocktype
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| #!/bin/bash | |
| # Overlays a video with visual debug information: the size (in bytes) of each frame and the type of frame, as well as motion vectors and block types (green P, intra purple/red) | |
| # Uses Courier New.ttf as found on OSX (not tested with other font files) | |
| ffprobe -loglevel warning -show_frames $1 | grep -A 20 media_type=video | grep "pkt_size\|pict_type" | sed 'N;s/\n/ /' | sed 's/[^=]*=\([0-9]*\)[^=]*=\(.\)/\1 \2 /' | awk '{ printf("%s %16d\n", $2, $1) }' > $1.frames-sizes | |
| ffmpeg -loglevel info -vismv pf -debug vis_mb_type -i $1 -b:v 10M -vf "[IN]drawtext= text=Frame type \\, size \=\\> bytes \\<=: x=10: y=299: fontfile=Courier New.ttf: fontcolor=#ffffffcc: box=1: boxcolor=#000000dd: fontsize=16, drawtext= fontfile=Courier New.ttf: textfile=$1.frames-sizes: fontcolor=#ffffffdd: x=310-tw: y=300-12*n: fontsize=18, drawtext= text=frame %{n} PTS %{pts}: x=(w-tw)/2: y=h-(2*lh)-100: fontcolor=white: box=1: boxcolor=0x00000099: fontsize=18[OUT]" $1.bitrate+mv+bt.mp4 | |
| sleep 1 | |
| rm -f $1.frames-sizes |