Is it possible to convert video without losing quality?

Have you ever read the truth – “What Happens to a YouTube Video After 1,000 Uploads?” I think it’s really a convincing evidence that can be used to explain “the losing quality in video conversion” in some way. Let’s analyse some factors.

Image is out of sync
Out of sync when uploading to YouTube. I don’t see a problem with the music and video being out of sync. What I do see is that the clarity of the video when uploaded to YouTube is not there. Within the video, each picture has what I can only call a multiple ghosting affect, so that it appears each photo image is out of sync with itself.
I recorded a 1.64G AVI format video tutorial, and I use Video Sharer to convert it to the same format AVI for YouTube uploading, the size is 9.86M, then I upload the converted video onto YouTube. And you know? I download it onto my computer Hard Disk, the size become 6.17M.
The degradation in video quality is often an issue with YouTube – when you export a video, YouTube takes your video and re-encodes it quickly and at low-resolution. This means that it may not look as good. Often, after a few hours, YouTube replaces the low quality-version with a high-quality version, which may look better, but has still been re-encoded. So naturally, what happens to a YouTube video after 1000 uploads? You got it?

Video Losing Quality
First of all, I think you should know – What is HD video?HD video or High-Definition video refers to any video system of higher resolution than standard-definition (SD) video, and most commonly involves display resolutions of 1280×720 pixels (720p) or 1920×1080 pixels (1080i/1080p). Some DV or camera recorded video formats are also HD video such as TS, M2TS, TP etc.
Video Losing Quality. I think the best metaphor to discribe: the sunny and foggy, or sound quality of WAV vs. AMR.You may know that if a really low configuration computer/cell phone play a HD video, what might happen? Get stuck, poor image quality, video/audio out of sync, equipment crash or what else, all are likely to happen. Then what we can do is to lower the video quality for the device, that is convert to other low-resolution formats. Then what do you think about the picture quality?

Video/Audio Out Of Sync
That’s video lag, you need to convert the frame size to the lowest as possible(Sansa Fuze met this problem), adjust the Resolution to 160×112 or others. BTW, Video Bitrate is not too relevant, I tested it thousands and works great. Well, compare the video itself and the device, I think you should have got the key point. And I want to emphasize in a simplest way, think about it – the parameter(pixels) and file size were changed, data has been re-encoded, is it possible the video without losing anything after conversion?!
Well, let’s make it clearly by figure out a question which is asked by an iPod YouTuber.

When upload HD videos to Youtube or play them on iPod, you will meet this problem – you should convert videos of one format into a compatible format that works on YouTube or iPod, but why the output quality often gets bad after conversion?

Essentially speaking, convert video to other formats, it’s not so simple as upload a FLV video file to YouTube, it re-encoded the video files. So it’s impossible to convert HD video without losing any quality as the code compress process would destroy most of unimportant data and affect parameter adjustment. BTW, what a good video converter can do is to reduce the quality losing as possible as we can.

As to Upload HD video to YouTube, for best results, you may download the High Resolution version of your video from Animoto and upload it to YouTube (not using our Export feature). Off-topic!

Another question: Can i convert my poor quality movie to high definition video so that it become more clearly? Seems unacceptable, at least, it doesn’t work currently. Hah~ Maybe you can ask FBI or Criminal Institutions Moving Pictures Experts, I think they are what we so-called Professional.
Re-encoded the video files to realize the different formats conversion. And even upload&download video can cause losing quality. Obviously&Definitely – convert video without losing quality – the baseless bullshit for ads. But whatever, someone creates it, someone(consumer) likes it, what can i say more! What do you say?