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| Thread ID: 142201 | 2016-05-17 04:21:00 | AVI file sizes | Tony (4941) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1420627 | 2016-05-17 04:21:00 | Can anyone give me a steer as to the number of gb/minute for an avi movie taken at 1280 x 720? | Tony (4941) | ||
| 1420628 | 2016-05-17 04:42:00 | It's almost too variable. AVI files can range from uncompressed to highly compressed. And it also depends on the internal encoding. If you take MKV as an example, it's about 1.5gb for 40 mins for 720p. |
psycik (12851) | ||
| 1420629 | 2016-05-17 05:50:00 | All the manual says is Motion JPEG (AVI) - see attachment. 7212 |
Tony (4941) | ||
| 1420630 | 2016-05-17 06:10:00 | No sound Tony? I wrote a script to calculate video with audio to make sure that I would fit inside a CD but it could have been used for any size you were aiming for. That script may exist somewhere on one of my computers but I haven't done encoding in a while and it would be easier for me to rewrite such script. It was used to get the best quality I could manage, as you had to compromise sound and/or quality. There is no way we can answer your question, AVI means jack as a file extension because it depends on the codec used, could guess it though but variable bitrates could gain or lose size. In raw data, 720p @ 25fps for a minute is roughly 4 to 8gb a minute depending on bits. Using H.264 possibly 240MB/min excluding sound. You would be better off, testing for your own figures and this is guessed at highest quality. Just saw M-JPEG that has a compression ratio of 1:20 so you maybe looking at 400MB/min excludes sound. |
Kame (312) | ||
| 1420631 | 2016-05-17 06:50:00 | Thanks guys. I think I have enough info now to answer my question. I've been asked if I could step in at the last minute and video a school stage play, and and I was wondering whether the 32gb sdhc card in my camera would be be big enough, and the answer is - not by a country mile - which is what I suspected. Apart from anything else, the manual says the max recording time is 25 minutes, which I'm fairly sure isn't going to be long enough, even with an interval. I've suggested they look at hiring a video camera from somewhere. | Tony (4941) | ||
| 1420632 | 2016-05-17 08:16:00 | motion jpeg is rather old. can be a real pain to edit as well depending on if you have the original software or not. only good thing with m-jpeg is its good for taking stills off the video. | tweak'e (69) | ||
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