How to transcode like YT does ?

[jazzzy]

this is source 6 Mbps

http://www.sendspace.com/file/pt17eq

and this is 2.7 Mbps which was transcoded from above by YouTube

http://youtu.be/KwyjAPWVGAE

as you see file size is twice smaller and quality is not noticeable worse (best to check are details on tire)

I wonder how does YT transcode as I wasn't able to replicate the same effect on my PC

[TreeTops]

To get best quality of video uploaded to Youtube look here: https://support.google.com/youtube/answer/1722171?hl=en&ref_topic=2888648

[poisondeathray]

It's not often YT is "praised" for good quality.

They use a modified x264 build, and one "trick" is they throw away 1/2 the frames - Your source video is 720p50, but YT is 720p25. You can do the same thing with some GUI for x264 e.g. handbrake, ripbot, megui, xvid4psp, ...etc... dozens others

You can even get better quality, because you can use slower higher quality settings with multipass encoding. YT emphasis is on speed (they use lower quality, faster settings) so they can post videos up faster

[jagabo]

The youtube video is of lower quality. But there's no secret. Just use a decent h.264 encoder and the same lower bitrate. x264 can do better than youtube's encoding, even keeping the 50 fps frame rate.

[jazzzy]

yes, that's why I wanted some guidance because simply lowering bitrate got me worse quality / strong compression

[jagabo]

You could use a batch file like this:

"C:\Program Files\x264\x264.exe" --preset=slow --pass=1 --bitrate=2550 --sar=1:1 --output %1.mkv %1
"C:\Program Files\x264\x264.exe" --preset=slow --pass=2 --bitrate=2550 --sar=1:1 --output %1.mkv %1

Then drag and drop your MP4 file onto the batch file. Change the path to x264.exe if you have it in a different location.

[jazzzy]

thanks, MediaCoder gave me good results, I have to work on some details but now I have 14 - 15 MB with no visible quality loss