30 hours to Render a 58 minute Video

[Ellen Leggett]

Haha, thanks for getting back to me so fast, and the tech talk is good, helps me learn, and I think I follow what you are saying. I am hoping to run another render attempt, this time taking into account some of the tips put forward by Wayne, and run the performance test via task manager. I will let you know how it goes.
Thanks again 🙂

[Ellen Leggett]

Just ran a quick test with a small (5 min) loop region, this time with lower average bit rate (4,000,000), smart re-sampling disabled, and frame rate set to 25 (Found out source was 50fps, which is annoying and explains a lot about large file sizes).

All 4 cores were running at about 89-98% with use of about 2.64GB Memory. Not real time render as Wayne suggested, but much better, 5 mins with estimated 14 mins render, which is MUCH better than 1 hour & 10 mins with est 30+ hours render. I think Wayne was on the ball with the frame rate conversion slowing things down, as well as re-sampling.
Good advice all round 🙂 Thanks

[Wayne Waag]

this time with lower average bit rate (4,000,000

Average bit rate of your render will not affect rendering time to any significant degree. However, it WILL decrease the quality of your render. Rendering at 4 Mbps will definitely affect your quality. You really don’t want to do that.

wwaag

[Ellen Leggett]

oh, I didn’t know that. haha, I really am newer to this than I thought. Update on the render progress: 3 hours in, 2 hours to go. The render time has increased, but not worrying me too much considering the old render time. Is this about as good as it will get or is there something else I should be doing in future? The render time is a bit inconvenient, but I can live with it and work around it.

Oh, also, some power settings were changed, I had my laptop on power saver even when it was on charge, went and changed it to high performance. do you imagine that might have had something to do with the previous long render time?

Thanks again 🙂

[Wayne Waag]

The power setting on your laptop shouldn’t have any effect once your render begins. Another option is to use the Sony AVC codec which is faster than Mainconcept. There is also an option of Quicksync support using Sony AVC which would definitely speed up render time, but I have no idea whether your laptop’s Intel processor supports it.

wwaag

[Ellen Leggett]

I will check for that codec, and if I cant find it I’ll get it.
The render finished after 5 hours and 2 minutes. I checked the file properties and saw that the resulting file was 3.35GB! This seems far too large a file size for the specifications and length of the video render. I did turn 13GB into 3.35GB, so still worth the render. Is this normal? do you know why it is so large, and how, if at all possible, to make it smaller?

Thanks 🙂

[Ellen Leggett]

I do have the codec btw. 🙂