PDA

View Full Version : pre-encoding for high quality on Youtube


Flexy
18th May 2007, 14:14
it seems i need to pre-convert all my vids to WMV 320x240 first to get the max possible quality on youtube.

Is there another way to circumvent the SLOW wmv-encoding ?

All i want is high quality vids on youtube....but it seems if i upload in other formats the resulting quality is bad.

foxyshadis
18th May 2007, 20:19
Use one-pass quality mode, set the slider to fast or fastest, and use a fairly high quality. (80 should be more than enough, but it's up to you.) The flip side is you get a larger video, but is that a major problem? You're not storing, just uploading once. Try to find the best tradeoff between quality, encode time, and upload time. (Of course it'll all be totally mangled on the youtube end anyway....)

Flexy
19th May 2007, 00:39
Use one-pass quality mode, set the slider to fast or fastest, and use a fairly high quality. (80 should be more than enough, but it's up to you.) The flip side is you get a larger video, but is that a major problem? You're not storing, just uploading once. Try to find the best tradeoff between quality, encode time, and upload time. (Of course it'll all be totally mangled on the youtube end anyway....)

there are still some contradicting statements on the net...one site says to encode in H264 first..the other says first encode to WMV.

i am not sure that i actually saw a difference in the final result..but i still might want to experiment more.

I encode, say wmv, resize 320x240 w/ lanczos, but vids still look pretty crappy then on youtube.

scharfis_brain
19th May 2007, 01:08
youtube always re-encodes your videos.
so the input format really doesn't matter as long as the quality is better than the actual output of youtube and it is readable by youtube.

I suggest a strong motion compensated temporal denoiser followed by a spatial blurring to prefilter the video you want to upload to youtube.

additionally you may want to drop the framerate by a factor of two, if nothing helps.

DeeGee
19th May 2007, 03:02
If you don't absolutely need to use Youtube, there are choices (http://en.wikipedia.org/wiki/Comparison_of_video_services).
I myself prefer DivX's Stage6 (http://stage6.divx.com/). There doesn't seem to be any resolution or bitrate limits.

Leak
19th May 2007, 11:41
If you don't absolutely need to use Youtube, there are choices (http://en.wikipedia.org/wiki/Comparison_of_video_services).
I myself prefer DivX's Stage6 (http://stage6.divx.com/). There doesn't seem to be any resolution or bitrate limits.
Or The Internet Archive (http://www.archive.org/details/They_Call_Me_Trinity.avi) - you can even download the original file as it was uploaded.

np: Adult. - Plagued By Fear (Why Bother?)

Zarxrax
20th May 2007, 00:32
I've been told that if you compress your video to flv yourself, then youtube wont recompress it when you upload it.

Blue_MiSfit
20th May 2007, 01:50
I highly doubt it. Think about how much storage it takes to store millions of videos, even at a paltry 225kbit CBR (IIRC). If somebody decided to upload 1500kbit FLVs, what would they do?

If you don't obey the resolution restrictions, again what would they do?

Seems much simpler and foolproof to me to just re-encode everything, but we all know what that does for video quality :(

~MiSfit

Ranguvar
23rd May 2007, 12:36
I highly doubt it. Think about how much storage it takes to store millions of videos, even at a paltry 225kbit CBR (IIRC). If somebody decided to upload 1500kbit FLVs, what would they do?

If you don't obey the resolution restrictions, again what would they do?

Seems much simpler and foolproof to me to just re-encode everything, but we all know what that does for video quality :(

~MiSfitWell, they do still have a 100MB size limit on uploads...

I'm going to check this one out. XviD4PSP encodes to FLV as well.

Or The Internet Archive - you can even download the original file as it was uploaded. You can download Stage6 videos as well. If the original format was Xvid/DivX, you can upload for streaming and then download it, it will be the EXACT same file, they just rename it to .divx, rename it back to .avi.

eb
19th January 2008, 02:58
To scharifs_brain,

I put some questions to you on youtube

How did you force them (I mean youtube) to accept picture size 480x360 and to accept such big bitrate?
Greetings
eb (Doom9)

I can see that you played some tricks with playtime (trippled it).
And what else?



http://www.youtube.com/watch?v=kv6qhr_e7Uo

Christina Aguilera & Sasha Cohen - Hurt Christmas

scharfis_brain
19th January 2008, 03:36
I found this nice guide:
http://forum.videohelp.com/topic336882.html

eb
19th January 2008, 03:43
:thanks:

ShadowVlican
20th January 2008, 22:08
I've been told that if you compress your video to flv yourself, then youtube wont recompress it when you upload it.
I found this nice guide:
http://forum.videohelp.com/topic336882.html
does it work? i'd try for myself, but YouTube has long banned my account :p


edit: yes it works!!

tutorial:
http://youtube.com/watch?v=GiQRCbdhh6o

proof u can cheat the system (these are recent uploads):
http://youtube.com/watch?v=nk_yy-GOBOM
http://youtube.com/watch?v=V_y3o5ZFx7A
http://youtube.com/watch?v=NC5lxRFjYn8

eb
20th January 2008, 22:23
It's working.

http://pl.youtube.com/watch?v=cGRTKhCbG0w

Thank you scharfis_brain.

eb

easy2Bcheesy
15th May 2008, 08:48
Is there any such similar hack for uploading h264?

lamer_de
15th May 2008, 17:33
No, youtube converts everything. The hack described earlier doesn't work anymore either (according to wikipedia). From what I gathered from an non-exhaustive search on the net the preferred method atm is to upload 640x480 videos in the highest possible quality and hope for the best :P

scharfis_brain
15th May 2008, 18:44
upload 480x360 pixels video to avoid youtube to scale for the &fmt=18 version.

j7n
15th May 2008, 19:04
Where is the magic that allows such crap quality website to become über-popular?

Comatose
18th May 2008, 11:44
Encoding at the highest possible quality is probably suggested to reduce the artifacts and wasted bitrate that result from re-encoding a lossy video ;3

johnsonlam
19th May 2008, 06:02
Did YouTube accept LOSELESS codec?

nm
19th May 2008, 07:32
Did YouTube accept LOSELESS codec?
Possibly. For example, FFV1 used to work: http://wiki.multimedia.cx/index.php?title=YouTube

johnsonlam
19th May 2008, 12:44
Possibly. For example, FFV1 used to work: http://wiki.multimedia.cx/index.php?title=YouTube

Thanks, that's what I want.
:thanks:

Leak
19th May 2008, 13:00
Thanks, that's what I want.
:thanks:
Don't forget that the table is almost one and a half years old - YouTube has changed quite a bit in that timeframe...

johnsonlam
21st May 2008, 12:19
Don't forget that the table is almost one and a half years old - YouTube has changed quite a bit in that timeframe...

Too bad seems no one updating the table, but I'm sure huffYUV not working.