created: 2020-08-12T09:34:01.000Z
mp4dumpでmp4ファイルのメタデータ(atom)をJSONで取得する
mp4dumpを使うとJSON形式で取得できる
$ mp4dump ./test.mp4 --format json > /tmp/_
$ mp4dump ./test.mp4 --format json | jq . | head -30
[
{
"name": "ftyp",
"header_size": 8,
"size": 28,
"major_brand": "mp42",
"minor_version": 0,
"compatible_brand": "avc1"
},
{
"name": "moov",
"header_size": 8,
"size": 9187,
"children": [
{
"name": "mvhd",
"header_size": 12,
"size": 108,
"timescale": 10000,
"duration": 150400,
"duration(ms)": 15040
},
{
"name": "trak",
"header_size": 8,
"size": 5341,
"children": [
{
"name": "tkhd",
"header_size": 12,
...
インストールはbrewでできる
$ brew install bento4
JSONをnodejsで処理するならこんな感じ
#!/usr/bin/env node
const { execFileSync } = require('child_process');
const [nodeExecutable, thisScriptPath, filename] = process.argv;
const stdout = execFileSync('/usr/local/bin/mp4dump', [filename, '--format', 'json']);
const atoms = JSON.parse(stdout);
