Phil Ehrens wrote:
> Carl Karsten wrote:
>> Phil Ehrens wrote:
>>> Carl Karsten wrote:
>>>> I was given a 30 min 2gig .mov taken with a ntsc camera - taked to post to
>>>> youtube (don't worry about the time, I can post big stuff)
>>>>
>>>> I am not exactly sure what youtube does on there end, pretty sure they will
>>>> re-encode it or something. I want to get it to something that doesn't
>>>> take 10
>>>> hours to upload.
>>>>
>>>> Anyone have a recommendation on encoding parameters?
>>>>
>>>> I hear h624 is 'best' for stuff like this.
>>> What would be best would be something that has the same
>>> resolution as the youtube content, and that has had the
>>> higher frequency components cut off. That said, I suspect
>>> that using lavc mpeg4 2-pass with nr just high enough so
>>> that things begin to soften would be best. That way there's
>>> nothing that will be a challenge for the awful encoder that
>>> youtube will throw at it... No scaling required and no
>>> wide peaks to get chopped off.
>> Sounds reasonable.
>>
>> I can't find a good source, but I did find some 2nd hand info:
>>
>> youtube stuff:
>> 320x240.
>> bitrate for the video is 300 kbp/s.
>> bitrate for the audio is 64 kbp/s mono mp3.
>> if they use 320x240 then why the hell do they play it back at 425x350?
>> Videobitrates are around 260 kbps, Audio is encoded to around 56 kbps,
>> monophonic, 22050 Hz mpeg3.
>> The enconder they use is FLV1 Flash/Sorensen
>
> According to a friend of mine, I'm totally wrong...
> He says that if you encode targeting the ipod/iphone
> that YouTube will not reencode it. He says that this
> is a new unstated policy. I have no idea whether he
> is 100% correct, but he is not prone to making the same
> kind of unsupported and unverifiable statements that
> I am ;^)
so what's the specs for ipod/iphone?
and... What do I have to do to get youtube's "high quality" option?
There is lots and lots of stuff on the web, but even youtub's docs dont' jive
(and they say noting about the HQ stuff)
[EMAIL PROTECTED]:~/temp/pycon_tc$ tcprobe -i ~/a/test.avi
[tcprobe] RIFF data, AVI video
[tcprobe] summary for /home/carl/a/test.avi, (*) = not default, 0 = not detected
import frame size: -g 480x360 [720x576] (*)
frame rate: -f 30.000 [25.000] frc=5 (*)
audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x55 [0x2000] (*)
bitrate=44 kbps
length: 299 frames, frame_time=33 msec, duration=0:00:09.966
http://www.youtube.com/watch?v=mCUMtf8RZzk
My collection of stuff:
http://www.transcoding.org/cgi-bin/transcode?Encoding_For_YouTube
Carl K
