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jokanane

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  1. Hi Nat, quite some logic there in your post - I'm not gonna go into all details of it in my response. However, I'd like to emphasize that "big file size" does not necessarily mean "lots to do for the computer"; in fact, it can be the opposite, because the pre-converted MPEG-2 (your large .avi) means that the editor does not have to convert / process the file on-the-fly while editing as it has to do with highly compressed formats (that your MP4 likely is; this is more about the contents / codecs, not the container). I'm a video edit newbie myself, but quite sure of that above. See more @ http://buildyourown.wordpress.com/2010/08/08/how-to-transcode-mov-files-using-matrox-codecs. > I have repeated this with MPEG2 clips and there is no > delay at all so it seems to be linked to using MPG4 video. I strongly encourage you to go for a setup that works. I wouldn't try editing my .MOV (H.264 + AAC audio) without converting it first into something less compressed. JSK
  2. Hi, I'm experiencing a similar / identical problem. The preview pane video is slow and falls behind the audio track. If I pause and resume the playback, the video jumps to the right frame and is in sync with the audio track, but starts to fall behind right away after resuming. The media file I'm editing / previewing is a 720p H.264 that I've converted to .avi using Matrox MPEG-2 I-frame HD codec, data rate 150Mb/s. Further details by your suggested MediaInfo further down *). I'm also using a laptop, but it's a Lenovo X301 with Intel dual-core U9400, 3GB of RAM, and an SSD hard drive, so quite a powerhouse for a laptop. It is a little low on SSD space - just 7GB free - so it's possible that things are getting tight there. Any recommendations? I've already cleaned the cache with Videopad. Any other places I should look into? I consider myself relatively experienced with PCs, so all tips, even detailed to the bone, are welcome. I try to avoid touching registers, though Thanks, JSK *) General Format : AVI Format/Info : Audio Video Interleave Format profile : OpenDML File size : 5.90 GiB Duration : 7mn 27s Overall bit rate : 113 Mbps Video ID : 0 Format : M701 Codec ID : M701 Duration : 7mn 27s Bit rate : 112 Mbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate : 29.970 fps Bits/(Pixel*Frame) : 4.045 Stream size : 5.82 GiB (99%) Audio ID : 1 Format : PCM Format settings, Endianness : Little Format settings, Sign : Signed Codec ID : 1 Codec ID/Hint : Microsoft Duration : 7mn 27s Bit rate mode : Constant Bit rate : 1 536 Kbps Channel(s) : 2 channels Sampling rate : 48.0 KHz Bit depth : 16 bits Stream size : 82.0 MiB (1%) Interleave, duration : 166 ms (4.98 video frames) Interleave, preload duration : 469 ms
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