[General Topics] Menneisyys:
UPDATE (05/10/2008): there is a lot to report on; most importantly, the just-released CorePlayer with its, on Windows Mobile, heavily bugfixed and enhanced YouTube support – and, on Symbian and Palm OS, its pure existence. I, in addition, elaborate on the differences of the three major formats used on YouTube: H.264, FLV and 3GP and give you some excellent screenshots of the real-life difference between them.

First, however, let’s take a look at the operating system-specific news.

1.	Symbian

a.	some people have asked me to elaborate on myZen, a Java-based and YouTube-compliant player. It’s not recommended at all - it's 3GP / RTSP only with all its drawbacks (sub-par video and audio, not compatible with several wireless operators etc.) Besides, it's, being based on Java, a bit slow. (Albeit this isn't really visible at playing back video as it uses the underlying media player.)

b.	I haven’t emphasized this in the initial version of the Bible, but it’s surely worth mentioning: not even the latest (build 4) version of MobiTube can play about 20% of the (FLV) videos off YouTube without (on the high-end N95 with the latest-and-greatest v21 firmware) major stuttering problems. One of these videos can be found HERE. Fortunately, the just-released CorePlayer can play all these videos without problems – or, for that matter, the Flash Lite 3 plug-in, if you don’t mind having to browse the full (and bloated) YouTube site from Nokia S60 Web. The developer has promised to look into the problem. In the meantime, I recommend getting CorePlayer for Symbian to play videos that MobiTube can’t play back. (YouTube does have some advantages over CorePlayer, though; for example, any number of hits. More on this later.)

2.	Windows Mobile

milesmowbray has been busily enhancing his youtubeplay app (see the review of an earlier version above) and adding nice features like getting the list of Related videos, a new, much more capable in-play GUI and saving a particular video to the file system. (Screenshots of the latter HERE and HERE). Currently, it’s at version v1.0.0.6 and is worth checking out if you want a free solution, don’t want to browse the bloated, original YouTube site in order to be able to utilize FlashVideoBundle, don’t want to watch low-quality 3GP streams (HTC Streaming Media, http://m.youtube.com/ etc.) and don’t want to use third-party, but FLV-based Web interfaces like YTPocket. Otherwise, if you don’t mind being commercial, the lack of clip saving and Related videos and/or have a VGA Pocket PC, CorePlayer might be a better, more mature solution.

3.	CorePlayer 1.2.4

Fortunately, CorePlayer, which has only recently received YouTube support, has received a lot of bugfixes in the meantime, which is certainly very good news for Windows Mobile users. Also, Symbian and Palm OS users rejoice: now, you also have YouTube support!

3.1	Windows Mobile

Let’s start with Windows Mobile. Two huge YouTube problems with pre-1.2.4 versions was the lack of FLV support and the buffering issues have been fixed. I’ll elaborate on what FLV is and how it compares to the other two streaming formats supported by CorePlayer.

As far as the buffering is concerned, the new version no longer exhibits the bad buffering problems of the previous versions, which stopped for buffering quite often even when the connection was far faster than required. In the old versions, this could only be partially fixed by increasing the system buffers to 32M (and enabling microdrive mode). There are no buffering problems with FLV playback either.

Unfortunately, it still has some major functionality problems; most importantly, it still doesn’t list related videos and, even more importantly, it’s only capable of listing 13 videos at most in ANY list. Just an example: if you look for, for example, all parts of Scandinavia: The Forgotten Front - see THIS for the first part - , at least one part will pretty surely be missing if you search for “winter war” using the built-in search tool. (Fortunately, the CorePlayer folks have promised me they would fix all these issues, along with adding support for other video sites – that is, not only YouTube, but also for example dailymotion (which already works in internal test versions) and, hopefully, Google Video.)

This problem is pretty huge on Windows Mobile; for example, with milesmowbray’s youtubeplay as of version v1.0.0.6 (it lists only five items as can also be seen HERE). On Symbian, MobiTube don’t suffer from this: there, 25 clips are shown at a time and you can switch to the next (previous) 25 hits by simply selecting Next / Previous page from the menu.

3.2 Symbian

The Symbian version, which has just received YouTube support, still suffers from the lack of H.264 hardware acceleration. That is, H.264 (480*320) clips are practically unwatchable. On the high-end Nokia N95, it drops about 30-40% of the played frames and has heavy buffering pauses. The somewhat lower-quality FLV playback has no such problems. Therefore, before hardware acceleration is added (or the H.264 playback efficiency seriously enhanced), you’ll want to stick to FLV playback instead of H.264 on Symbian (but not on Windows Mobile, particularly if you have a VGA device).

4.	Differences between the three streaming formats: H.264, FLV and 3GP

You may not understand what the three streaming formats, H.264, FLV and 3GP, are, and how they compare to each other, quality-wise. Let’s take a closer look at this question, particularly now that CorePlayer introduced support for FLV in addition to the other two formats.

4.1 H.264

H.264 is the best of all and, currently, is only supported by CorePlayer on both WinMo and Symbian. (The other players are either FLV or 3GP-only.) It has the highest video resolution (480*360), the highest video and audio bit rate with the most advanced codecs (H.264 for video and stereo 44 kHz AAC audio). This, however, also means that it has much higher data usage than the other formats: about 1.8 times more than that of FLV and 3-4 times more than 3GP (also somewhat depending on the audio codec used with the latter). Also, it has much higher CPU demands than FLV or 3GP; this is why, for example, Symbian devices currently can’t play back YouTube videos in the H.264 format. Let’s see an example (the first frame of THIS clip); make sure you compare the quality to that of the two other videos. I’ve deliberately selected a clip with some subtitles; it’s mostly on the latter than you can really see the resolution differences between H.264 and FLV. Also make sure you check out the general blockiness of the videos. (Note that I’ve taken these shots with 95% JPG quality; that is, I haven’t introduced almost any additional blockiness.)

The additional strength of the H.264 format is the support for stereo 44 kHz sound. While, currently, very few (see for example THIS) real-world clips have a stereo soundtrack - and the ones that work on mobiles, like THIS and THIS, don’t necessarily have stereo audio on the desktop.

4.2 FLV

Now, let’s turn to FLV, which is the most widely supported format on mobile platforms. On Windows Mobile, for example, there aren’t other players with H.264 support, while ones with FLV support abound (for example, FlashVideoBundle, milesmowbray’s youtubeplay, YTPocket etc.)

YouTube FLV is, technically, far inferior to H.264: it only has the resolution of 320*240, has much lower bitrate and the technically inferior (worse quality at the same bitrate) H.263 video and MP3 audio format. It doesn’t support stereo audio either.

While on a low-resolution (for example, QVGA) screen the quality difference isn’t so visible as on a high-resolution one (where the difference in the resolution plays a big role in rendering FLV much inferior to H.264), it’s still preferable to go for H.264 even on QVGA handsets because the H.264 videos are just less blocky (much higher bitrate and much more advanced format). Also, the audio is much better (44 vs. 22 kHz and, when possible, stereo). An example screenshot showing the resolution / blockiness on a VGA device: