mirror of
https://github.com/alfg/mp4-rust.git
synced 2024-06-02 13:39:54 +00:00
Make the example tolerant of videos missing parts
Some videos are missing certain parts that the example was assuming would be present. This change makes all such access conditional on the parts being present. Also added the display of the box version and the creation time in a human-readable format. This serves to demonstrate the logic for converting the MP4 epoch (1904-01-01) to Unix epoch (1970-01-01).
This commit is contained in:
Nathan Fiedler
parent
e875c7da44
commit
cad50c0c16
75
Cargo.lock
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75
Cargo.lock
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@ -1,16 +1,91 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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[[package]]
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name = "autocfg"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "byteorder"
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version = "1.3.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "chrono"
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version = "0.4.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
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"num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
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"time 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "libc"
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version = "0.2.71"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "mp4"
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version = "0.4.0"
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dependencies = [
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"byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"chrono 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "num-integer"
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version = "0.1.42"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "num-traits"
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version = "0.2.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "time"
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version = "0.1.43"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"libc 0.2.71 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "winapi"
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version = "0.3.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "winapi-i686-pc-windows-gnu"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "winapi-x86_64-pc-windows-gnu"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[metadata]
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"checksum autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
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"checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
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"checksum chrono 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)" = "80094f509cf8b5ae86a4966a39b3ff66cd7e2a3e594accec3743ff3fabeab5b2"
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"checksum libc 0.2.71 (registry+https://github.com/rust-lang/crates.io-index)" = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
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"checksum num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "3f6ea62e9d81a77cd3ee9a2a5b9b609447857f3d358704331e4ef39eb247fcba"
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"checksum num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
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"checksum time 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
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"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
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"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
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"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
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@ -19,3 +19,6 @@ license = "MIT"
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[dependencies]
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byteorder = "1"
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[dev-dependencies]
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chrono = "0.4.11"
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@ -1,8 +1,9 @@
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extern crate mp4;
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use chrono::prelude::*;
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use mp4::TrackType;
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use std::env;
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use std::fs::File;
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use mp4::{TrackType};
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fn main() {
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let args: Vec<String> = env::args().collect();
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@ -17,44 +18,71 @@ fn main() {
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// Print results.
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println!("File:");
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println!(" file size: {}", bmff.size);
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println!(" brands: {:?} {:?}\n", bmff.ftyp.major_brand, bmff.ftyp.compatible_brands);
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println!(" file size: {}", bmff.size);
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println!(
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" brands: {:?} {:?}\n",
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bmff.ftyp.major_brand, bmff.ftyp.compatible_brands
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);
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println!("Movie:");
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println!(" duration: {:?}", moov.mvhd.duration);
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println!(" timescale: {:?}\n", moov.mvhd.timescale);
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println!(" version: {:?}", moov.mvhd.version);
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println!(
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" creation time: {}",
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format_creation_time(moov.mvhd.creation_time)
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);
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println!(" duration: {:?}", moov.mvhd.duration);
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println!(" timescale: {:?}\n", moov.mvhd.timescale);
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println!("Found {} Tracks", moov.traks.len());
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for trak in moov.traks.iter() {
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let tkhd = trak.tkhd.as_ref().unwrap();
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let mdia = trak.mdia.as_ref().unwrap();
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let hdlr = mdia.hdlr.as_ref().unwrap();
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let mdhd = mdia.mdhd.as_ref().unwrap();
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let stts= mdia.minf.as_ref().unwrap()
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.stbl.as_ref().unwrap()
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.stts.as_ref().unwrap();
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println!("Track: {:?}", tkhd.track_id);
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println!(" flags: {:?}", tkhd.flags);
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println!(" id: {:?}", tkhd.track_id);
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println!(" type: {:?}", get_handler_type(hdlr.handler_type.value.as_ref()));
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println!(" duration: {:?}", tkhd.duration);
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println!(" language: {:?}", mdhd.language_string);
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println!(" media:");
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println!(" sample count: {:?}", stts.sample_counts[0]);
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println!(" timescale: {:?}", mdhd.timescale);
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println!(" duration: {:?} (media timescale units)", mdhd.duration);
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println!(" duration: {:?} (ms)", get_duration_ms(mdhd.duration, mdhd.timescale));
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if tkhd.width != 0 && tkhd.height != 0 {
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println!(" width: {:?}", tkhd.width);
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println!(" height: {:?}", tkhd.height);
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}
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if get_handler_type(hdlr.handler_type.value.as_ref()) == TrackType::Video {
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println!(" frame rate: (computed): {:?}", get_framerate(&stts.sample_counts, mdhd.duration, mdhd.timescale));
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if let Some(ref mdia) = trak.mdia {
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let hdlr = mdia.hdlr.as_ref().unwrap();
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let mdhd = mdia.mdhd.as_ref().unwrap();
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let stts = mdia
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.minf
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.as_ref()
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.map(|m| m.stbl.as_ref().map(|s| s.stts.as_ref()).flatten())
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.flatten();
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println!(
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" type: {:?}",
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get_handler_type(hdlr.handler_type.value.as_ref())
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);
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println!(" language: {:?}", mdhd.language_string);
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println!(" media:");
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if let Some(ref s) = stts {
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println!(" sample count: {:?}", s.sample_counts[0]);
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}
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println!(" timescale: {:?}", mdhd.timescale);
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println!(
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" duration: {:?} (media timescale units)",
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mdhd.duration
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);
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println!(
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" duration: {:?} (ms)",
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get_duration_ms(mdhd.duration, mdhd.timescale)
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);
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if get_handler_type(hdlr.handler_type.value.as_ref()) == TrackType::Video {
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if let Some(ref s) = stts {
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println!(
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" frame rate: (computed): {:?}",
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get_framerate(&s.sample_counts, mdhd.duration, mdhd.timescale)
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);
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}
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}
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}
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}
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},
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}
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_ => {
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println!("Usage: mp4info <filename>");
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}
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@ -81,4 +109,15 @@ fn get_framerate(sample_counts: &Vec<u32>, duration: u32, timescale: u32) -> Str
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let sc = (sample_counts[0] as f64) * 1000.0;
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let ms = (duration as f64 / timescale as f64) * 1000.0;
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return format!("{:.2}", sc / ms.floor());
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}
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}
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fn format_creation_time(creation_time: u32) -> String {
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// convert from MP4 epoch (1904-01-01) to Unix epoch (1970-01-01)
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let time = if creation_time >= 2082844800 {
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creation_time - 2082844800
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} else {
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creation_time
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};
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let dt = Utc.timestamp(time as i64, 0);
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dt.format("%Y-%m-%d %H:%M:%S").to_string()
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}
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