init

license

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+Copyright (c) 2016, stephen mcquay
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name of smcquay nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

mov.go

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+package mov
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"os"
+	"time"
+)
+
+const epochAdjust = 2082844800
+
+// Created attempts to find a created time from the metadata in a .mov file.
+func Created(path string) (time.Time, error) {
+	var r time.Time
+	f, err := os.Open(path)
+	if err != nil {
+		return r, err
+	}
+	defer f.Close()
+
+	buf := [8]byte{}
+	for {
+		_, err := f.Read(buf[:])
+		if err != nil {
+			return r, err
+		}
+		if bytes.Equal(buf[4:8], []byte("moov")) {
+			break
+		} else {
+			atomSize := binary.BigEndian.Uint32(buf[:])
+			f.Seek(int64(atomSize)-8, 1)
+		}
+	}
+
+	_, err = f.Read(buf[:])
+	if err != nil {
+		return r, err
+	}
+
+	s := string(buf[4:8])
+	switch s {
+	case "mvhd":
+		if _, err := f.Seek(4, 1); err != nil {
+			return r, err
+		}
+		_, err = f.Read(buf[:4])
+		if err != nil {
+			return r, err
+		}
+		i := int64(binary.BigEndian.Uint32(buf[:4]))
+		c := i - epochAdjust
+		u := time.Unix(c, 0).Local()
+		return u, nil
+	case "cmov":
+		return r, errors.New("moov atom is compressed")
+	default:
+		return r, errors.New("expected to find 'mvhd' header, didn't")
+	}
+}

readme.md

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+packge mov
+
+simple package to parse out creation time from a .mov file