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Friday, July 16, 2010

Download YouTube HQ22 HQ37 HQ38

I often download a YouTube video ...  to extract a soundtrack and save it as mp3 or to save a short film for offline viewing, so the kids can watch stuff in the train and so on.
There are many documented methods out there but still some people aren't aware, that all web videos actually can be saved. I use three different tools to get the best results:
  • the Firefox Add-On Download Helper (66 Mio downloads)
  • and Handbrake to convert the videos to the size and format that best suits my needs
  • AudioCoder for all audio related tasks with full control (aka Mediacoder Audio Edition)

Before you start grabbing videos you need to know just one important thing:
>> YouTube offers most videos in different resolutions


Let me give you an example: If you're an audiophile type, then you certainly want to know that higher quality streams also offer better audio encoding. It might be essential to the music grabber to understand the different quality levels available, since Download Helper offers you to choose the desired encoding and size level. If you haven't heard about that, you gonna end up with lower quality than expected.

This list gives you an overview of available YouTube formats
(will complete it later)


Type
Resolution
Ratio
Format
Audio (quality)
Name
video bit rate
[HQ6]
480x360
4:3
FLV
mono
HQ6

[HQ18]
480x360
4:3
MP4
stereo
add &fmt=18 to url

[HQ35]
854x480
16:9
FLV
44.1 kHz stereo AAC 102kps
480p

[HQ22]
1280x720
16:9
MP4
44.1 khz stereo
AAC LC 128kps
720p
~730kbps @30fps
[HQ13]
176x144
4:3
3GP
mono
HQ13

[HQ17]
176x144
4:3
3GP
stereo
QCIF Mobile

[HQ34]
640x360
16:9
FLV
stereo
360p

[HQ37]
nov, 2009
1920x1080
16:9
MP4
stereo
1080p

[HQ38]
3840x2160
( was 4096x 2304)
also 2048x1152
16:9
MP4
AVC1 high @L5.0
44.1kHz stereo AAC 151Kbps /VBR)
4k  or  4096p or “original”
or 2k, 2160p (old 2048p)
4k ~???
2k ~1570 kbps @30fps
[HQ5]
400x226
16:9
FLV
stereo
240p


05.02.2014: interestingly some of my observations differ from the table at en.wikipedia.org/wiki/YouTube


In many cases you then want to convert the downloaded stuff:
>> Handbrake is very easy to use and delivers fantastic results.
  • Open the video you want to convert (the source video)
  • choose one of the predefined profiles
  • edit the settings (resolution) to your likings
  • choose the destination for the converted file
  • go!

Looking for an easy way to create MP3 Files from the grabbed video? Usually it takes only two to three clicks to extract the sound. I suggest using AudioCoder. (Beacause of LAME.exe problems and drag&drop you should download the 32bit version only.) I convert because I prefer how perfectly mp3 is treated by all devices out there - I'm talking about skipping tracks, embedding cover art, embedding meta data etc.
You lose a bit of quality while converting AAC to let's say mp3 "cbr 164kb/s" because both are lossy compression formats but I couldn't care less about that, while being in a crowded airport or a TGV...   phreaks just shouldn't convert.

[09.08.2011 - please note, that I'm checking on alternatives to MediaCoder products because - they violate GPL for not properly informing about the ffmpeg licence, not to mention the absence of source code providing since 2008. Chinese product - open source first - closed source since 2008? It's wrong. BTW Same problem with Freemake - with freemake I'm even more sceptic because they hide all their intentions and sources.]

>>  If you want to deal with the original AAC audio stream only,  you might want to try the small tool Yamb >> developer site, "editing" / "extract streams"to split/demux the AAC audio stream from the video stream.

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