Magic Lantern Forum

Using Magic Lantern => Raw Video => Topic started by: edbay on November 24, 2015, 12:07:32 PM

Title: Movie recording stopped automagically
Post by: edbay on November 24, 2015, 12:07:32 PM
Hey Guys,
so I'm very new to this!
But I'm trying to film in RAW Video (not MLV), and 'Movie recording stopped automagically' comes up 6 seconds into filming, anyone know how i can fix this?
Iv been playing around and have found that if I go into the RAW Videos advanced settings, and tun on frame skipping, i can film for longer, but its skipping so many frames, so i can use the footage!

Any ideas where I'm going wrong?

Thanks Guys :)
Title: Re: Movie recording stopped automagically
Post by: Walter Schulz on November 24, 2015, 12:21:22 PM
Type of cam?
Resolution and frame rate?
File system on card?
Type of card? Benchmark showing which numbers?
Title: Re: Movie recording stopped automagically
Post by: edbay on November 24, 2015, 12:35:55 PM
Canon EOS 60D
resolution 1728x972
FPS 25
just realised the SD card I'm using is sandisk extreme 8GB 30MB/s, is that the problem? the card writes too slowly?
Title: Re: Movie recording stopped automagically
Post by: Walter Schulz on November 24, 2015, 12:54:52 PM
SD-card limit in 60D: About 21 MByte/s writing to card.
Bandwidth required for 1728x972@25 = 1728 x 972 x 14 x 25 / 8 = 73483200 Byte/s = 70.1 MByte/s

Numbers don't match. See https://github.com/rbrune/mlraw
Title: Re: Movie recording stopped automagically
Post by: edbay on November 24, 2015, 01:27:22 PM
Im sorry but that makes no sense to me.. Im new to all of this! Im a student who studies Visual Effects, Basically I just want my camera to film as HQ as possible, So I can film on green screen!
What settings should I be using?
Title: Re: Movie recording stopped automagically
Post by: Walter Schulz on November 24, 2015, 01:29:20 PM
Maximum storage interface bandwidth your cam is able to handle is 21 MByte/s. The raw mode you are using (determined by resolution and frame rate) requires 70.1 MByte/s.
The numbers don't match.

What is your problem?
Title: Re: Movie recording stopped automagically
Post by: edbay on November 24, 2015, 01:39:51 PM
Oh ok, So if i were to get a better SD card that could be written to at 80MPs, would it work?
Title: Re: Movie recording stopped automagically
Post by: Walter Schulz on November 24, 2015, 01:42:22 PM
For the third time: The cam's limit (cam = camera) is 21 MByte/s. And there is nothing you can do about it.
Title: Re: Movie recording stopped automagically
Post by: edbay on November 24, 2015, 02:30:38 PM
oh okay, i understand, So the maximum my camera can film RAW is 864X486 (16:9) 25FPS. Wouldn't my camera filming normally on 1920x1080 25FPS be higher quality then it filming in RAW then?
Title: Re: Movie recording stopped automagically
Post by: Walter Schulz on November 24, 2015, 02:34:25 PM
Apples and pears. Define "quality" first.
Title: Movie recording stopped automagically
Post by: DeafEyeJedi on November 25, 2015, 09:42:19 AM
Personally, I think RAW shot in 864x486 (can be stretched to 1280x720 if you like) can still look just as good as H264 in 1080p if not better.

I mean see it for yourself as Walter says.

Doesn't hurt to try and experiment.

Plus who doesn't want RAW?