Re: [OT] Uploading DConf videos
On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei Meh. If you could send the videos to Dicebot before you announce them so that the YouTube link can be posted concurrently, that would be good.
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 03:39:55 UTC, Andrei Alexandrescu wrote: On 7/18/14, 6:15 PM, Kiith-Sa wrote: This. Vimeo is quite popular, quality shouldn't be a problem and people aren't going to wait for an hour like with archive.org. Awesome. Can you please volunteer to mirror all of dconf videos to vimeo? Thanks. Andrei: I'm about 90% sure you're doing something wrong. I've never seen a HD youtube video with such low quality. Ask Dicebot, he's doing it. Andrei I'm trying it out. I've probably hit your issue with Vimeo, though: Vimeo is impractical unless you pay them (~50€/year). With a free account you can only upload 1 HD video / week. I guess you pay for what you get with no ads. I'm going to upload one video anyway just to test it. My point, however, is that you need the video to be accessible before you post it somewhere to Reddit. Archive.org is *not* accessible, it's bandwidth is way too limited. You need to have it on Vimeo, or YouTube, or whatever *before* you post it. Dicebot uploading it an hour later and posting it in a comment that may or may not get noticed (or me uploading it a day later) is not going to help.
Re: [OT] Uploading DConf videos
On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei My opinion: good quality is nice for fans, but if your goal is to target a large audience, go with the mainstream and post a link to YouTube, which can be played everywhere: mobile, tablet, you name it. After all, it's not the Ironman movie, understanding what is being said and being able to read the slides is good enough, and streaming speed is more important than quality. I mean, what the high quality is good for if streaming is laggy and the video is not watchable?
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 03:39:55 UTC, Andrei Alexandrescu wrote: Andrei: I'm about 90% sure you're doing something wrong. I've never seen a HD youtube video with such low quality. Ask Dicebot, he's doing it. All I did: 1) wget archive.org link for largest available .mp4 2) press Upload button on YouTube web page no brain involved :( First few videos may be different though because I got sources for them from ustream as .flv containers, archive.org appeared later.
Re: [OT] Uploading DConf videos
On 2014-07-19 05:39, Andrei Alexandrescu wrote: That's a good point, thanks. But I haven't seen complaints from people about archive.org, though I did see before about ustream.tv. -- Andrei archive.org is extremely slow for compared with youtube. We're talking one _hour_ vs two minutes. -- /Jacob Carlborg
Re: [OT] Uploading DConf videos
On 2014-07-19 00:39, Andrei Alexandrescu wrote: Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei Here's a couple of alternatives: * youtube-dl - command line tool, requires Python. Just run the tool with the URL as the argument [1] * Flash Video Downloader - plugin for Firefox. Adds a button below each clip on youtube to download [2] * 4K Video Downloader - standalone application for OS X. Past the URL in the application and it will start to download [3] If think the plugin for Firefox is easiest to use. [1] http://rg3.github.io/youtube-dl/ [2] http://www.flashvideodownloader.org/ [3] http://www.4kdownload.com/products/product-videodownloader -- /Jacob Carlborg
Re: [OT] Uploading DConf videos
On 2014-07-19 17:16, Jacob Carlborg wrote: archive.org is extremely slow for compared with youtube. We're talking one _hour_ vs two minutes. *for me -- /Jacob Carlborg
Re: [OT] Uploading DConf videos
On 7/19/2014 7:51 AM, Tourist wrote: I mean, what the high quality is good for if streaming is laggy and the video is not watchable? There's always actual downloading.
Re: [OT] Uploading DConf videos
On 7/18/2014 6:39 PM, Andrei Alexandrescu wrote: Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei No, because of the re-encoding already mentioned. Re-encoding can never result in quality equal to the original source, unless you're re-encoding to a lossless format (which would almost always be pointless for various reasons). That said though, YouTube's higher-qualities really aren't too bad, IME. Their encodings have come a good way since their horrible, horrible quality early years. Of course, I still think it's very good to offer the original non-reencoded version too.
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 18:52:34 UTC, Nick Sabalausky wrote: On 7/19/2014 7:51 AM, Tourist wrote: I mean, what the high quality is good for if streaming is laggy and the video is not watchable? There's always actual downloading. Yeah, but I talk about casual audience here. Would you download a random 1GB video about SOMERANDOM programming language only to see what it's about for a couple of minutes?
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 03:39:55 UTC, Andrei Alexandrescu wrote: On 7/18/14, 6:15 PM, Kiith-Sa wrote: This. Vimeo is quite popular, quality shouldn't be a problem and people aren't going to wait for an hour like with archive.org. Awesome. Can you please volunteer to mirror all of dconf videos to vimeo? Thanks. Andrei: I'm about 90% sure you're doing something wrong. I've never seen a HD youtube video with such low quality. Ask Dicebot, he's doing it. Andrei I uploaded one DConf video to test Vimeo: https://archive.org/details/dconf2014-day01-panel Vimeo has a limit of 500MB/week so I actually had to reencode it myself (~734-~480MB). Then Vimeo reencoded it again after upload. So quality with a paid account would likely be higher. The top image is the original, middle is my reencode before uploading and bottom is the result at Vimeo: http://imgur.com/a/2SXHx There's a visible loss of detail, but it's not nearly evident as on the screens you have shown. Here's the video: https://vimeo.com/101179246
Re: [OT] Uploading DConf videos
... and I did try YouTube now just to see if the quality is really that bad. It isn't: http://i.imgur.com/Cu1tUQl.png That's about as good as the archive.org originals. I took this with YouTube resolution set to 1280x720 on a 1920x1080 monitor. I really think you are doing something wrong. Or YouTube is serving lower resolution to you for some reason even if you have HD turned on. Maybe a crappy ISP?
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 22:42:40 UTC, Kiith-Sa wrote: ... and I did try YouTube now just to see if the quality is really that bad. It isn't: http://i.imgur.com/Cu1tUQl.png That's about as good as the archive.org originals. I took this with YouTube resolution set to 1280x720 on a 1920x1080 monitor. I really think you are doing something wrong. Or YouTube is serving lower resolution to you for some reason even if you have HD turned on. Maybe a crappy ISP? ... and for completeness here's a screen of the same video with 360p (480p actually looks better): http://i.imgur.com/bE1ak5i.png I think this is what YouTube is serving to you (even though colors seem different? - details are the same)
Re: [OT] Uploading DConf videos
On 18/07/14 03:55, Israel Rodriguez wrote: This man has it right. I dont think quality is a huge issue though unless youre watching something that needs to be sensitive to the eye in which case youtube will work just fine for these videos. Youtube supports resolutions of 4k, I don't see the problem with quality. -- /Jacob Carlborg
Re: [OT] Uploading DConf videos
On 7/17/14, 11:53 PM, Jacob Carlborg wrote: On 18/07/14 03:55, Israel Rodriguez wrote: This man has it right. I dont think quality is a huge issue though unless youre watching something that needs to be sensitive to the eye in which case youtube will work just fine for these videos. Youtube supports resolutions of 4k, I don't see the problem with quality. Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei
Re: [OT] Uploading DConf videos
On Friday, 18 July 2014 at 15:44:21 UTC, Andrei Alexandrescu wrote: On 7/17/14, 11:53 PM, Jacob Carlborg wrote: On 18/07/14 03:55, Israel Rodriguez wrote: This man has it right. I dont think quality is a huge issue though unless youre watching something that needs to be sensitive to the eye in which case youtube will work just fine for these videos. Youtube supports resolutions of 4k, I don't see the problem with quality. Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei archive.org serves the same file you uploaded to Youtube, without change. Youtube always re-encodes the video, for various reasons: - sources are very heterogeneous - multiple formats needed for various devices, various resolutions, and bandwidth adaptation - insanely low bitrates (3000kbps for 1080p H.264 is scarce, yet it's not so bad with the encode Youtube does) So while Youtube quality might be worse, the used bitrates are probably not the same. My opinion is that it's best to let Youtube serve the content for maximum reach.
Re: [OT] Uploading DConf videos
On 7/18/14, 9:32 AM, ponce wrote: On Friday, 18 July 2014 at 15:44:21 UTC, Andrei Alexandrescu wrote: On 7/17/14, 11:53 PM, Jacob Carlborg wrote: On 18/07/14 03:55, Israel Rodriguez wrote: This man has it right. I dont think quality is a huge issue though unless youre watching something that needs to be sensitive to the eye in which case youtube will work just fine for these videos. Youtube supports resolutions of 4k, I don't see the problem with quality. Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei archive.org serves the same file you uploaded to Youtube, without change. Youtube always re-encodes the video, for various reasons: - sources are very heterogeneous - multiple formats needed for various devices, various resolutions, and bandwidth adaptation - insanely low bitrates (3000kbps for 1080p H.264 is scarce, yet it's not so bad with the encode Youtube does) So while Youtube quality might be worse, the used bitrates are probably not the same. My opinion is that it's best to let Youtube serve the content for maximum reach. And you can always download a high-quality version from YouTube in various formats (including the original format) using something like ClipGrab.
Re: [OT] Uploading DConf videos
On 7/18/2014 12:40 PM, David Gileadi wrote: And you can always download a high-quality version from YouTube in various formats (including the original format) using something like ClipGrab. But not the original non-re-encoded version.
Re: [OT] Uploading DConf videos
On 7/18/2014 2:53 AM, Jacob Carlborg wrote: On 18/07/14 03:55, Israel Rodriguez wrote: This man has it right. I dont think quality is a huge issue though unless youre watching something that needs to be sensitive to the eye in which case youtube will work just fine for these videos. Youtube supports resolutions of 4k, I don't see the problem with quality. Video quality is far, far more than just resolution.
Re: [OT] Uploading DConf videos
On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? I think that Youtube starts streaming at a lower quality and finishes playing some amount of the lower quality buffer before switching to the higher quality stream. If you kept watching the Youtube video, it should have gotten better. If you switch to higher quality, then seek back to the beginning of the video, it will start in the higher quality. http://i.imgur.com/ERjtI8h.jpg Youtube after seeking back to beginning
Re: [OT] Uploading DConf videos
On 2014-07-18 17:44, Andrei Alexandrescu wrote: Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei You're streaming and not downloading from Youtube. I always download longer video clips from Youtube. I don't want any buffering while watching. -- /Jacob Carlborg
Re: [OT] Uploading DConf videos
A few things to know : - Bitrate is adaptive to accommodate for - slow to high speed transport layer - windowed to fullscreen image size (as for C++ you pay for what you want :) - resolution can be forced ( click the bottom right gear ) - The original format you upload matters : see https://support.google.com/youtube/answer/1722171?hl=en - YouTube quality can be very high : https://www.youtube.com/playlist?list=PL5BF9E09ECEC8F88F (again, go fullscreen with high speed connectivity or force the resolution and possibily wait for data to come) - As it's been stated a few times in this thread : YouTube reencode the videos for various reasons, a particularly important one being security. Some people use videos to do code injection so they don't distribute a bit precise copy of the source. It needs to be a valid video from start to finish with no hidden data. Guillaume On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei
Re: [OT] Uploading DConf videos
On 7/18/14, 10:46 AM, Nick Sabalausky wrote: On 7/18/2014 12:40 PM, David Gileadi wrote: And you can always download a high-quality version from YouTube in various formats (including the original format) using something like ClipGrab. But not the original non-re-encoded version. So I think what we're doing now (archive.org is the, well, archive, and youtube is a mirror) is what the doctor prescribed. -- Andrei
Re: [OT] Uploading DConf videos
On 7/18/14, 12:53 PM, Jacob Carlborg wrote: On 2014-07-18 17:44, Andrei Alexandrescu wrote: Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei You're streaming and not downloading from Youtube. I always download longer video clips from Youtube. I don't want any buffering while watching. Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei
Re: [OT] Uploading DConf videos
On Friday, 18 July 2014 at 22:39:02 UTC, Andrei Alexandrescu wrote: On 7/18/14, 12:53 PM, Jacob Carlborg wrote: On 2014-07-18 17:44, Andrei Alexandrescu wrote: Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei You're streaming and not downloading from Youtube. I always download longer video clips from Youtube. I don't want any buffering while watching. Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei Do you increase the resolution of your Youtube videos when you don't like the quality that it's streaming? It's not clear if you are complaining about the quality because you're on a slow network and Youtube is giving you the low-quality encode, or if you don't like their higher-quality encodes also. If you click on the Settings icon that looks like a gear below the video, you can force the quality as high as the original video uploaded, by changing the default Auto resolution mode. I can't complain about their HD encodes. As for downloading from Youtube, that's not really officially supported, but scripts/apps like the one linked earlier will do it. Have you looked at Vimeo? They're probably the second-biggest video site after Youtube and are sticklers for quality resolution, as they used to focus on the indie filmmaker community, and they officially support downloading videos, if the uploader chooses to enable that option.
Re: [OT] Uploading DConf videos
On Friday, 18 July 2014 at 21:26:34 UTC, Andrei Alexandrescu wrote: On 7/18/14, 10:46 AM, Nick Sabalausky wrote: On 7/18/2014 12:40 PM, David Gileadi wrote: And you can always download a high-quality version from YouTube in various formats (including the original format) using something like ClipGrab. But not the original non-re-encoded version. So I think what we're doing now (archive.org is the, well, archive, and youtube is a mirror) is what the doctor prescribed. -- Andrei That is a reasonable approach, I just think you should post the youtube links when you post on reddit since the lack of adaptive streaming (and decent CDNs) can make it a crappy experiance. Why add more barriers to entry?
Re: [OT] Uploading DConf videos
On Friday, 18 July 2014 at 22:39:02 UTC, Andrei Alexandrescu wrote: On 7/18/14, 12:53 PM, Jacob Carlborg wrote: On 2014-07-18 17:44, Andrei Alexandrescu wrote: Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei You're streaming and not downloading from Youtube. I always download longer video clips from Youtube. I don't want any buffering while watching. Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei I don't think so.
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 00:31:33 UTC, Joakim wrote: On Friday, 18 July 2014 at 22:39:02 UTC, Andrei Alexandrescu wrote: On 7/18/14, 12:53 PM, Jacob Carlborg wrote: On 2014-07-18 17:44, Andrei Alexandrescu wrote: Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei You're streaming and not downloading from Youtube. I always download longer video clips from Youtube. I don't want any buffering while watching. Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei Do you increase the resolution of your Youtube videos when you don't like the quality that it's streaming? It's not clear if you are complaining about the quality because you're on a slow network and Youtube is giving you the low-quality encode, or if you don't like their higher-quality encodes also. If you click on the Settings icon that looks like a gear below the video, you can force the quality as high as the original video uploaded, by changing the default Auto resolution mode. I can't complain about their HD encodes. As for downloading from Youtube, that's not really officially supported, but scripts/apps like the one linked earlier will do it. Have you looked at Vimeo? They're probably the second-biggest video site after Youtube and are sticklers for quality resolution, as they used to focus on the indie filmmaker community, and they officially support downloading videos, if the uploader chooses to enable that option. This. Vimeo is quite popular, quality shouldn't be a problem and people aren't going to wait for an hour like with archive.org. Andrei: I'm about 90% sure you're doing something wrong. I've never seen a HD youtube video with such low quality. Either you didn't set the resolution higher (default is 360p or something), or you have a crappy connection and YouTube refuses to stream high-quality (it happened to me a few times that I still got the low-quality video after setting it to HD - refresh (F5) after setting the resolution sometimes works), or as said above you made that screen only a few seconds after starting/skipping a part of the video.
Re: [OT] Uploading DConf videos
On 7/18/14, 5:58 PM, currysoup wrote: On Friday, 18 July 2014 at 21:26:34 UTC, Andrei Alexandrescu wrote: On 7/18/14, 10:46 AM, Nick Sabalausky wrote: On 7/18/2014 12:40 PM, David Gileadi wrote: And you can always download a high-quality version from YouTube in various formats (including the original format) using something like ClipGrab. But not the original non-re-encoded version. So I think what we're doing now (archive.org is the, well, archive, and youtube is a mirror) is what the doctor prescribed. -- Andrei That is a reasonable approach, I just think you should post the youtube links when you post on reddit since the lack of adaptive streaming (and decent CDNs) can make it a crappy experiance. Why add more barriers to entry? That's a good point, thanks. But I haven't seen complaints from people about archive.org, though I did see before about ustream.tv. -- Andrei
Re: [OT] Uploading DConf videos
On 7/18/14, 6:15 PM, Kiith-Sa wrote: This. Vimeo is quite popular, quality shouldn't be a problem and people aren't going to wait for an hour like with archive.org. Awesome. Can you please volunteer to mirror all of dconf videos to vimeo? Thanks. Andrei: I'm about 90% sure you're doing something wrong. I've never seen a HD youtube video with such low quality. Ask Dicebot, he's doing it. Andrei
Re: [OT] Uploading DConf videos
On 7/18/14, 5:31 PM, Joakim wrote: On Friday, 18 July 2014 at 22:39:02 UTC, Andrei Alexandrescu wrote: On 7/18/14, 12:53 PM, Jacob Carlborg wrote: On 2014-07-18 17:44, Andrei Alexandrescu wrote: Somehow the same DConf videos are of better quality on archive.org than on youtube.com. Could you explain that? -- Andrei You're streaming and not downloading from Youtube. I always download longer video clips from Youtube. I don't want any buffering while watching. Is there an easy way to download off of youtube one of DConf talks at the same quality as the archive.org content? -- Andrei Do you increase the resolution of your Youtube videos when you don't like the quality that it's streaming? I streamed at maximum resolution (720p) when taking those screenshots. It's not clear if you are complaining about the quality because you're on a slow network and Youtube is giving you the low-quality encode, or if you don't like their higher-quality encodes also. I'm not complaining about anything, just trying to find the best solution. If you click on the Settings icon that looks like a gear below the video, you can force the quality as high as the original video uploaded, by changing the default Auto resolution mode. I can't complain about their HD encodes. As for downloading from Youtube, that's not really officially supported, but scripts/apps like the one linked earlier will do it. Have you looked at Vimeo? They're probably the second-biggest video site after Youtube and are sticklers for quality resolution, as they used to focus on the indie filmmaker community, and they officially support downloading videos, if the uploader chooses to enable that option. Yes, I have, and rejected it last year (forgot the reason why). Maybe the reason has disappeared in the meantime. Andrei
Re: [OT] Uploading DConf videos
On Saturday, 19 July 2014 at 03:37:37 UTC, Andrei Alexandrescu wrote: On 7/18/14, 5:31 PM, Joakim wrote: Do you increase the resolution of your Youtube videos when you don't like the quality that it's streaming? I streamed at maximum resolution (720p) when taking those screenshots. Sorry, I hadn't looked at the screenshots from your original post when I responded, I see that the HD icon is there. As others have said, I have noticed that if the Youtube video is initially downloading as 360p/480p and then you change it to 720p, it will sometimes keep playing whatever it's buffered so far in the lower resolution before switching to the higher res, even though it says HD. The other reason might be transcoding errors. Have you looked at Vimeo? They're probably the second-biggest video site after Youtube and are sticklers for quality resolution, as they used to focus on the indie filmmaker community, and they officially support downloading videos, if the uploader chooses to enable that option. Yes, I have, and rejected it last year (forgot the reason why). Maybe the reason has disappeared in the meantime. They're pretty good but their flash video player has some weird behavior when buffering, sometimes pausing the video even when it's buffered way ahead. Every video site has its own problems, but maybe you'll like the video quality better on Vimeo.
[OT] Uploading DConf videos
I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei
Re: [OT] Uploading DConf videos
On 2014-07-17 20:54, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? I don't know the details but it does quite a lot of processing. Splitting it up, makes it available in the different qualities and so on. BTW, have you tried downloading it from youtube and not stream it? There are plugins for Firefox or tools [1] to do that. I can't see any difference compared to the download video from youtube. [1] http://rg3.github.io/youtube-dl/ -- /Jacob Carlborg
Re: [OT] Uploading DConf videos
Am Thu, 17 Jul 2014 11:54:20 -0700 schrieb Andrei Alexandrescu seewebsiteforem...@erdani.org: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei I think youtube always recodes videos. Probably to a lower bitrate and and with faster, but lower quality encoding (single pass vs multipass, etc.). For youtube formats, see: http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs
Re: [OT] Uploading DConf videos
On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei My experience with youtbe is that they render the video in various resolutions. They then try to adapt the user connection speed by serving a lower or higher quality video. When you upload the video, at first, only the low quality is available. Higher quality come later.
Re: [OT] Uploading DConf videos
On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei The DConf 2013 videos are streamed from YouTube in HD, and the quality is quite good, but the DConf 2014 are not streamed in HD, and can make it difficult to read some text on the slides. I don't know why they are different. Perhaps the DCOnf 2014 videos were re-encoded at a lower quality before they were uploaded. Mike
Re: [OT] Uploading DConf videos
On Friday, 18 July 2014 at 00:33:35 UTC, Mike wrote: On Thursday, 17 July 2014 at 18:54:18 UTC, Andrei Alexandrescu wrote: I'm not an expert in videos but as I mentioned I've studied a few options last year before deciding to use archive.org as our reference upload site. I got curious just now, so I just uploaded two screenshots: http://i.imgur.com/x1bsTNf.jpg with archive.org http://i.imgur.com/CEFCgAi.jpg with youtube.com Indeed the archive.org resolutions looks visibly better; my understanding is archive.org is streaming the very mp4 content I uploaded to it. Could anyone give more detail on what processing youtube does? Thanks, Andrei The DConf 2013 videos are streamed from YouTube in HD, and the quality is quite good, but the DConf 2014 are not streamed in HD, and can make it difficult to read some text on the slides. I don't know why they are different. Perhaps the DCOnf 2014 videos were re-encoded at a lower quality before they were uploaded. Mike I take that back, this DConf 2014 video (http://www.youtube.com/watch?v=TNvUIWFy02I) is streamed in HD. I'm not sure why the others aren't.
Re: [OT] Uploading DConf videos
On Friday, 18 July 2014 at 00:38:16 UTC, Mike wrote: I take that back, this DConf 2014 video (http://www.youtube.com/watch?v=TNvUIWFy02I) is streamed in HD. I'm not sure why the others aren't. Most likely this is exactly the re-encoding thing that was mentioned - better qualities get added later eventually as they take more processing time. I always upload original mp4 of best quality from archive.org , no re-encoding from my side.
Re: [OT] Uploading DConf videos
On Thursday, 17 July 2014 at 20:10:36 UTC, Johannes Pfau wrote: Am Thu, 17 Jul 2014 11:54:20 -0700 schrieb Andrei Alexandrescu seewebsiteforem...@erdani.org: I think youtube always recodes videos. Probably to a lower bitrate and and with faster, but lower quality encoding (single pass vs multipass, etc.). For youtube formats, see: http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs This man has it right. I dont think quality is a huge issue though unless youre watching something that needs to be sensitive to the eye in which case youtube will work just fine for these videos.
