|Feb 20, 2011, 08:21 PM||#1|
Decrease file size of MP4 or MKV movie?
I have some HD movies in mkv and mp4 formats that are around 5GB. Is there any way that I can shrink them down to be slightly less than 4GB so that I can move them to my FAT32 external? I want to do this without losing too much quality. Thanks!
|Feb 21, 2011, 04:31 AM||#3|
Handbrake will do this. I usually start with the AppleTV legacy setting and adjust it as I need but I am streaming to a 1st ATV if that matters (I suspect it does not).
Just set the target file size. I would go below 4GB as it tends to overshoot now and then. I leave it on .h264 for HD content but with SD I tend to use plain mp4 as its considerably quicker without taking up much more space.
Mkvs should fly along fairly well but I find re-encoding mp4s takes forever. No idea why that is, though having said that I am not sure I've tried it with Handbrake, only Visualhub.
|Feb 21, 2011, 06:45 AM||#4|
You can use handbrake with an output size of <4096mb, however you will notice a drop in quality, re-encoding x264 video is a fundamentally flawed process which you should avoid at all costs. Just know that if your video has DTS audio, handbrake will only allow you to re-encode to 2.0 AAC, it will passthrough AC3, however.
Something to bear in mind, most 720p x264 rips available contain DTS audio @ 1.5mb/s, any DVD5 (4.37GB) size releases you have can be shrunk to <4GB by re-encoding the DTS to AC3 at 640kb/s. However, that's a bit more of an advanced process, go ahead if you're familiar with demuxing, muxing etc. Wont work for 1.5xDVD5 (6.6GB) or DVD9 (8GB) though.
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