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Any good ways to achieve quick but high compression of TV Recordings?
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<blockquote data-quote="jameson_uk" data-source="post: 1021618" data-attributes="member: 11220"><p>MP4 has nothing to do with compression, it is a container and could contain MPEG2, VC1, H264 ....</p><p><a href="http://en.wikipedia.org/wiki/Comparison_of_container_formats" target="_blank">http://en.wikipedia.org/wiki/Comparison_of_container_formats</a></p><p> </p><p>These video formats determine the compression and quality. MPEG-4 comes in a few different flavours (Xvid is part 2, H.264 is part 10 ...)</p><p><a href="http://en.wikipedia.org/wiki/MPEG-4" target="_blank">http://en.wikipedia.org/wiki/MPEG-4</a></p><p> </p><p>Then for each format you have different bitrates that determine the size and quality. So even choosing H.264 you can end up with massively different file size and quailty.</p><p> </p><p>MPEG-4 codecs (used in HD TV, blurays and some online streams) have better compression than MPEG 2 (using in SD TV, DVDs etc.) but due to the fact you get better compresion MPEG-4 is also used for 3G phone streaming and video which is pretty poor quality.</p><p> </p><p>What do you actually want? If you want reduced file size then choose a tool that does re-encoding (Ripbot, Handbrake, <insert re-encoding tool here>) and select a H264 profile that gives you about the right file size and the quality is as good as you will get.</p><p> </p><p>If you want quality then you are only going to get worse quality than you started with but choose a profile that meets you quality requirements and you will have to live with the file size.</p><p> </p><p>This all said, storage is so cheap that you will probably end up spending more money on electricity re-encoding everything than it might cost for a new hard drive.....</p></blockquote><p></p>
[QUOTE="jameson_uk, post: 1021618, member: 11220"] MP4 has nothing to do with compression, it is a container and could contain MPEG2, VC1, H264 .... [url]http://en.wikipedia.org/wiki/Comparison_of_container_formats[/url] These video formats determine the compression and quality. MPEG-4 comes in a few different flavours (Xvid is part 2, H.264 is part 10 ...) [url]http://en.wikipedia.org/wiki/MPEG-4[/url] Then for each format you have different bitrates that determine the size and quality. So even choosing H.264 you can end up with massively different file size and quailty. MPEG-4 codecs (used in HD TV, blurays and some online streams) have better compression than MPEG 2 (using in SD TV, DVDs etc.) but due to the fact you get better compresion MPEG-4 is also used for 3G phone streaming and video which is pretty poor quality. What do you actually want? If you want reduced file size then choose a tool that does re-encoding (Ripbot, Handbrake, <insert re-encoding tool here>) and select a H264 profile that gives you about the right file size and the quality is as good as you will get. If you want quality then you are only going to get worse quality than you started with but choose a profile that meets you quality requirements and you will have to live with the file size. This all said, storage is so cheap that you will probably end up spending more money on electricity re-encoding everything than it might cost for a new hard drive..... [/QUOTE]
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