h.264 convert

[miojamo]

Hello,

I have 1 hour video material encoded with mainconcept h.264/50p however the file size is about 16GB I would like to create smaller file for share, however with good quality ~2GB

What codec/software to use?

Thanks

[hech54]

with good quality ~2GB

Impossible.

[miojamo]

So what do you recommend?

[Baldrick]

Try convert with vidcoder or handbrake and see how it looks like. Just make a short sample. Adjust the bitrate/quality setting under the video tab to adjust the output file size.

You could also upload to youtube or vimeo and share the video private.

[jagabo]

file size = running time * bitrate (plus a little overhead for the container)

So the only solution to your problem is to use a lower bitrate. About 4000 kbps to get an hour of video into 2 GB. Use a bitrate calculator to get more precise values.

[Hoser Rob]

It depends upon your definition of 'good' ... but you will lose quality.

Who knows? I've seen lots of video with 10/10 user ratings that I considered abysmal.

[hello_hello]

Reducing the resolution 1080p - > 720p etc, is the most commonly used method for re-encoding video to reduce the file size while still encoding at a decent quality.
I've not really worked with 50p video but does it have to be 50p? If not, reducing the frame rate to 25p might help.

There's really no telling how much you can reduce the file size (without reducing the perceived quality much), even if you keep the original resolution. I usually encode Bluray video at 720p and using x264s default settings and encoding to a specific quality a 720p movie encode can range from anywhere between around 2GB and 5GB. Just because the original video uses h264 doesn't mean it was compressed very hard in the first place so you might be able to reduce the file size by re-encoding.

I'd try a single pass x264 quality based encode using a quality setting (CRF value) of 20 to start. If the resulting file size is too large you can increase the CRF value a little or you can reduce the resolution (or a combination of the two) and try again. It's really a bit of trial and error. Most encoder GUIs will let you run a 2 pass encode which allows you to select a desired file size but it can be more hit and miss as you've got know way of knowing what the quality will be.

Ripbot264, Vidcoder, MeGUI, Handbrake..... are all encoder GUIs which will encode using the x264 encoder.

[jagabo]

And shaky, noisy, handheld camcorder video won't compress as well as well as professionally shot film movies.