Post subject: Youtube glitch
Editor, Expert player (2364)
Joined: 5/15/2007
Posts: 3940
Location: Germany
Ever since I uploaded my Super Mario Land TAS to Youtube , some terrible Youtube glitch has been screwing up most of my videos that I uploaded since. It makes simple video uploading a total hell because if the clip is longer than just 30 secs, the chance of such a glitch happening is great and it makes me re-render the video hundreds of times.. Example: http://www.youtube.com/watch?v=REB2-cSF28o Original 0:25 http://www.youtube.com/watch?v=NSGrmXkS66c 1080p 1:00 720p 0:51, 0:56, http://i.imgur.com/H602g.png I encode my videos the same way since maybe 2009. Dump at uncompressed, lagarith or ffdshow(h.264 lossless), and then run an avisynth script on it and render it with ffdshow (h.264 lossless or mpeg4) in virtualdub. This youtube glitch has happened with both h.264 lossless and mpeg4 on different resolutions. Help pls
Joined: 7/2/2007
Posts: 3960
Looks fine to me, man. The image you linked showing corrupted graphics didn't happen to me, and I didn't notice anything wrong with the SML run at any of the indicated timepoints. Maybe your Flash is on the blink?
Pyrel - an open-source rewrite of the Angband roguelike game in Python.
ventuz
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Player (126)
Joined: 10/4/2004
Posts: 940
[URL=http://imgur.com/9B6EJ][/URL] from 720p
Emulator Coder, Skilled player (1114)
Joined: 5/1/2010
Posts: 1217
At least for 720p, it is not flash messing up. Mplayer2 also glitches on that video, and shows
[h264 @ 0x7f7711311b20]error while decoding MB 35 25, bytestream (-27)
[h264 @ 0x7f7711311b20]concealing 1014 DC, 1014 AC, 1014 MV errors in P frame
A:  57.0 V:  57.0 A-V:  0.000 ct:  0.002   0/  0  0%  6%  0.6% 0 0
[h264 @ 0x7f7711311b20]concealing 652 DC, 652 AC, 652 MV errors in P frame
Also, the glitches being in different places in different resolutions suggests that it is not problem with decoding the uploaded video, but a problem encoding the resized video (so playing with formats won't help)...
Editor, Expert player (2364)
Joined: 5/15/2007
Posts: 3940
Location: Germany
Derakon: You say it didn't happen for you. Did you see the video in the stated setting? (Original for the Kirby video, 1080p or 720 for Mario Land) If it doesn't happen for everyone, that would be a relief for me, however, ventuz and Ilari make it look like it does happen for everyone. The video is badly re-encoded by Youtube. I also posted on their help forum and the only response I got was that Youtube is more focused on cosmetic changes to their site rather than this and nothing would happen unless someone "important" complained...
Player (66)
Joined: 4/21/2011
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My test encode of links awakening had some messed up macro blocks. http://www.youtube.com/watch?v=5GxZRzlHo60 720p 0:20
Joined: 7/2/2007
Posts: 3960
I checked both nanogyth's video and the SML video in all sizes and saw nothing wrong at the stated times. I'm using OSX, and my Flash version is 10.3.181.34 (per http://helpx.adobe.com/flash-player/kb/find-version-flash-player.html ).
Pyrel - an open-source rewrite of the Angband roguelike game in Python.
Editor, Expert player (2364)
Joined: 5/15/2007
Posts: 3940
Location: Germany
This is my version: I switched back to 10.3 but the video is still glitched. EDIT: I did a few test uploads. 30 FPS MPEG4 AVI -> This is the problem file 60 FPS MPEG4 AVI -> Seems to fix it, but I didn't account for the framerate change in my avisynth script, thus the resulting movie is trimmed at wrong frames 30 FPS MPEG4 AVI converted to MP4 -> Didn't fix it 30 FPS MPEG4 AVI converted to MKV -> Didn't fix it 30 FPS MPEG4 FLV1 -> Didn't fix it. What I found out: When the glitch occurs, rendering the video in another format may fix it sometimes. Rendering the video in a different framerate may fix it either sometimes or for good(?). Converting the problem video doesn't seem to fix it.
ventuz
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Player (126)
Joined: 10/4/2004
Posts: 940
I forgot to mention, I don't see glitched graphic at those time frames but I do see video 'lock up' for a sec or 2. After I download those video, it do show glitched graphic, smearing effect like what I showed off my GIF. Derakon, maybe you don't see any glitched graphic but do you see any lock up at those time frame?
Joined: 7/2/2007
Posts: 3960
Hm, interesting. My laptop's on Flash 11.1.102.55. With it, I did notice a very brief freeze in the SML video at 0:52 in the medium resolution, and in the smallest it visually glitches out: Didn't notice anything in the Link's Awakening video, but it's sufficiently static that it could be hard to tell (audio's not affected, just video). Also didn't notice anything in the Kirby video. I don't have access to my home computer to check if it has freezes, but I seem to recall noticing something like that happening.
Pyrel - an open-source rewrite of the Angband roguelike game in Python.