What is the best way to compress video without losing any video quality??

[DJboutit]

What would be the best way to compress videos to save space without losing any video quality??

Would going with H265 be a good option for this and on average how much space would I save with going with H265 over H264 at the same bitrate??

[jagabo]

What would be the best way to compress videos to save space without losing any video quality??

You can't do it without loosing quality.

Would going with H265 be a good option for this and on average how much space would I save with going with H265 over H264 at the same bitrate??

h.265 potentially can compress the video about 30 percent better than h.264. Exactly how much better depends on the particular video, the particular encoder, and the particular encoder settings used.

[DJboutit]

Would it be worth it convert like 10tb to 15tb worth of video to H265??

[smrpix]

how much space would I save with going with H265 over H264 at the same bitrate??

At the same bitrate you would save zero space. (filesize=bitrate* duration.) But the H265 would probably look a little better.

[Alwyn]

Would it be worth it convert like 10tb to 15tb worth of video to H265??

Depends on what the source video format is. If the source is MPEG 2 then you'd save a lot, I'd guess 50%, if you converted it to H265. You'd have to do some experiments, but the space saving would be significant.

[DJboutit]

Most of the videos I have a H264 or X264

[Alwyn]

In that case, Jagabo's answer in post #2 is applicable.

[jagabo]

Yes, re-encoding your h.264 videos with h.265 can only decrease the quality.

[Santiago]

HandBrake is a free program that reduces video size without any loss of quality.

[Cornucopia]

No it doesn't.

Scott

[hech54]

handbrake is a free program that reduces video size without any loss of quality.

Wrong.

[lollo]

HandBrake is a free program that reduces video size without any loss of quality.

False, and not appropriate, Handbrake is just a GUI

[DJboutit]

So which of these two would be better for saving space H265 or AV1 10bit??

[pandy]

So which of these two would be better for saving space H265 or AV1 10bit??

Try both, select one where your condition "without losing any video quality" is fulfilled.

[DJboutit]

What is the fastest free H265 and AV1 converter??

[Alwyn]

False, and not appropriate, Handbrake is just a GUI

It uses FFMPEG. What's the problem with a GUI front-end?

[android]

Whatt...??
Handbrake also use ffmpeg??


I would suggest to do some experiments with h265 as video codec and opus as audio codec
I have heard about AV1 codec but not sure that it's better then h265 or not

If you want low file size then compress video and audio both
And if there's multiple audios then only keep track which you want and remove unwanted audio tracks.

[jagabo]

So which of these two would be better for saving space H265 or AV1 10bit??

In theory, AV1 is better. But AV1 is generally slower by quite a bit. And there's not much playback support outside of computers yet.

What is the fastest free H265 and AV1 converter??

Generally, faster encoders deliver lower quality or require more bitrate to achieve the same quality. So by asking for fast encoding you're getting worse quality and/or larger files.

That said, what's fastest depends on your hardware and the settings you use. Does your graphics card (or integrated GPU) have a hardware h.265 encoder or AV1 encoder? Try comparing the hardware encoder to software encoding with your CPU. For example NVEnc h.265 (nvidia's hardware encoder) vs. x265 (an open source software encoder). There are very few hardware AV1 encoders as of yet. Recent builds of Handbrake give you access to all these encoders.

But basically, I consider it a waste of time and resources to convert h.264 to h.265.

[lollo]

False, and not appropriate, Handbrake is just a GUI

It uses FFMPEG. What's the problem with a GUI front-end?

Handbrake is not an encoder, so the statement from user Santiango saying "is a free program that reduces video size without any loss of quality." does not make any sense.

The encoders supported by Handbrake make, or better, make not, the reduction of size without loss of quality.

[DJboutit]

So which of these two would be better for saving space H265 or AV1 10bit??

In theory, AV1 is better. But AV1 is generally slower by quite a bit. And there's not much playback support outside of computers yet.

What is the fastest free H265 and AV1 converter??

Generally, faster encoders deliver lower quality or require more bitrate to achieve the same quality. So by asking for fast encoding you're getting worse quality and/or larger files.

That said, what's fastest depends on your hardware and the settings you use. Does your graphics card (or integrated GPU) have a hardware h.265 encoder or AV1 encoder? Try comparing the hardware encoder to software encoding with your CPU. For example NVEnc h.265 (nvidia's hardware encoder) vs. x265 (an open source software encoder). There are very few hardware AV1 encoders as of yet. Recent builds of Handbrake give you access to all these encoders.

But basically, I consider it a waste of time and resources to convert h.264 to h.265.

I have A RX 6600 XT video card. I have Tested H265 vs AV1 AV1 has like 4 to 5 times slower encode speed so a 3.5gb with H265 50min with AVI 3 1/2 to 5 hrs. So I want to compress like 5tb to 8tb of videos with AV1 would take a min of 3 months longer than going with H265.

[pandy]

What is the fastest free H265 and AV1 converter??

https://www.newegg.com/asrock-arc-a380-a380-cli-6g/p/N82E16814930076?Item=N82E16814930076

https://www.tomshardware.com/reviews/intel-arc-a380-review/5

I know you expected different answer but as you not providing information about your current setup then from my perspective this is most sane approach unless you willing to wait many hours.

Btw i would recommend A310 but it seems to be not available to buy.

[android]

Yes, re-encoding your h.264 videos with h.265 can only decrease the quality.

Post #8

But what if re-encoding done like below
Source - h264

Encoding to h265 and selecting lossless option

Then will it decrease quality?

[smrpix]

Yes, re-encoding your h.264 videos with h.265 can only decrease the quality.

Post #8

But what if re-encoding done like below
Source - h264

Encoding to h265 and selecting lossless option

Then will it decrease quality?

May not decrease the quality (much.) But It will likely increase the file size.

Maybe you should take a short piece of your video, experiment with different settings and see what works for you on a filesize/quality scale.

[jagabo]

But what if re-encoding done like below
Source - h264

Encoding to h265 and selecting lossless option

Then will it decrease quality?

No (unless you make some kind of mistake, like a color format conversion or mismatch) but the resulting file will be ~10 times larger than the video you started with.

[android]

Depends on what the source video format is. If the source is MPEG 2 then you'd save a lot, I'd guess 50%, if you converted it to H265.

Post #5

If source is mpeg 2 re-encoded to h265 lossless then it will also increase file size or it will decrease file size without losing quality?

[jagabo]

Depends on what the source video format is. If the source is MPEG 2 then you'd save a lot, I'd guess 50%, if you converted it to H265.

Post #5

If source is mpeg 2 re-encoded to h265 lossless then it will also increase file size or it will decrease file size without losing quality?

Mpeg2 to h.265 lossless will usually increase the file size several fold. Not to mention produce a file that will not be playable by most hardware outside a computer.

But why take my word for it? Just try it yourself.

[sophisticles]

@OP

You are going about things the wrong way.

Once something is in a delivery format, h264, h265, vp9, av1, etc, it is nearly always best to keep it in the format it currently is.

If you shop around you can find 512gb thumb drives for $35; buy 2 of those and call it a day:

https://www.microcenter.com/product/658941/micro-center-512gb-superspeed-usb-30-flash-drive