Messages

I don't think you can get over FPS gop.

But wait, I tried GOP=100 (TL v2) and it worked. Virtual dub reported 1 key-frame every 100 frames

Yes you can do audio, in that it does function at 25p but If you turn it on with these settings the buffer fills straight away, so I leave it off

Check this:
http://www.magiclantern.fm/forum/index.php?topic=1565.msg28974#msg28974
stable 160 mbps video in 25p with audio recording (higher than 165 mbps is not possible because of SD controller limit ~21mBps)

[a1ex]

Canon 600D 24p variable buffer improvements vs old method
(before max seconds -> now max seconds).

W/o line skipping:
1280x720 - 3 > 6 (crop-factor = 2.16)
1280x536 - 6 > 14 (crop-factor = 2.16)

16:9 line skipping (unsqueezed resolution in brackets)
1280x434(720) - 29 > 42 (crop-factor = 2.16)
1344x456(756) - 11 > 27 (crop-factor = 2.06)
1472x500(828) - 5 > 11 (crop-factor = 1.88)
1600x542(900) - 3 > 7 (crop-factor = 1.72)
1728x586(972) - 2 > 5 (crop-factor = 1.6)

2.39:1 line skipping (unsqueezed resolution in brackets)
1472x370(616) - 50 > very long (crop-factor = 1.88)
1600x404(670) - 8 > 19 (crop-factor = 1.72)
1728x436(724) - 5 > 10 (crop-factor = 1.6)

Thank you, a1ex!

Right now, that's all I'm caring about, that GOP control feature, because it's becoming clearer that on a 600D, the raw feature ain't going to happen for 720p@24 fps.

GOP Control is not the best way to achieve max quality of H.264.
Flush rate control do this job better, but it just lacks compatibility with audio yet...

Yes... but there is a  hack now.

Nice! How many MBs available with hack?
found: 32*32*29

  Interlaced recording will be very handy to achieve 1920x1080 60i... (requires just 1920x324 60p bandwidth)

is the downloadlink broken on the startpage??

Thread links is outdated. 600D audio controls is now in nightly builds:
http://nanomad.magiclantern.fm/nightly/

may be your gain and boost levels are too low - so levels can't raise enough to be seen on meter.
with overrided audio, levels are set with ML menu only.

just turn on audio override

People, is it possible to create a raw video without line skipping process.

it was available right from first implementations of RAW recording... in 5x/10x focus assist mode it will record w/o lineskipping: https://vimeo.com/66604210

setting iso to 12800 and bring exporure down in post.

do you know, that shooting RAW ISO12800 is the same as ISO3200+2 stop exposure up in post? max native sensor ISO of 600D is 3200

So 16:9 1460x820(500) 60p can be achieved with 5D3? Nice.

And still doubt what is better in matter of resolution: 1920x1080 h264 vs 960x540 raw.

Try to compare 1920x1080 h264 with 1280x434 raw (shoot in canon 720p) upscaled to 1920x1080 (without borders)

The frames recorded at 60 fps are squashed and need to be corrected in post.

Can you calculate how squashed are frames? For 600D height needs to be upscaled to 166%. Interested in 5D Mark III height upscale.

[Can you calculate actual distortion? Knowing it, we can control output resolution.]

60 FPS frame distortion.

By using RAW video while the camera is in Video Mode I can select a video mode of 1280x720 60fps video.  If I press the record button the camera records RAW video at 60 fps but.. The frames are distorted (shrunk heigth) and need to be stretched in post to maintain the image shape.

For 600D it is 166% - you need to upscale height to 166% with 600D to restore correct aspect.
Can you calculate actual distortion? Knowing it, we can control output resolution.
(with 166% for example and 1920x650 60p it is 1920x1080 60p after correcting aspect in post. pretty nice)

I agree, last changes are very good! Thanks, a1ex!

Can I ask to add 434px height?
1280x434 will work for 10-20 sec max I think, but it will result in nice 16:9 1280x720 after restoring correct aspect ratio (when recording in 720p mode of 600D). I think that it will be my favorite resolution for 600D.

Yes, saw that. Are these all partial sensor crop? Is there a full-sensor mode on 600d?

Yes, partial. Full sensor mode is only achieved with 1740x1160, but transfer rate is too high for SD controller to record 24p continuously.

@Vicnaum - Thanks for the new benchmark. Ok, it's not really any different so it means we can probably use global draw without affecting bandwidth.

I just checked what affects RAW recording - Magic Zoom, Histogram, general Global Draw are ok (i'm not sure if MZ makes corrupted frames or not - it looks messed when use while recording). But focus peaking or zebras have great impact on frameskipping , so try to avoid it when recording RAW

So it turns out the 650d (t4i) can support the high speed UHS-I cards!!!!

Yes, and no. 40 mb/s maximum just like 6D - it is RAW 1280x720 max

Assuming that we have fast enough CF cards,
we can do 3.5 k raw with 5x zoom with CF card of 150 MBps (Toshiba),
can we do 6 k raw with 10x zoom?

No jokes - yes we can! 6 fps 6K RAW with 5D3, 14 fps 5K RAW with 1D X!
Check burst photos

Can someone post samples from these resolutions from a 600D? I want to try to compare it upscaled against the H264 equivalents.

1280х360:
http://www.youtube.com/watch?v=w48Eqz7DAlg

I did 1280x540, not crop, although data blocks magenta, perhaps by the speed of the card.

I posted max possible continuous RAW-recrording on 600D without frameskipping. Any higher will result in frameskipping...

Magenta blocks appears randomly, but it looks like accessing canon menu or ML menu while recording will result in this blocks too.

Not sure about the tech stuff, but If you guys can get a useable raw on the 550D/600D I'm going to assume you guys are aliens.

The best you can with 600D (550D/60D) is: (limited by hardware SD transfer rates)
- 960х540, upscale it to 1280х720 (24 fps max)
- 1280х400, tight aspect 3.20:1 (24 fps max)
In Canon's 720p - lineskipping 1.66х, so you should upscale to restore correct ratio:
- 1280x400 upscales to 1280x664 - near to 16:9 (24 fps max)
- 1280x360 upscale to 1280x600 - 2.13:1 aspect
- 1280x320 upscale to 1280x533 - 2.40:1 cinemascope aspect

It is only 1280px wide, but pretty nice looking though

Andy600, no way because it can't go higher than ~1280x720 because of SD interface limit. BM Pocket is capable of 1920x1080

For 600D/60D/550D:
If you record in canon 720p mode, height is line skipped by 1.66x.
So 1280x400 will give you 1280x664 after restoring correct aspect ratio - it is so close to 16:9! (434px height will result in 16:9, but it hits SD limit and results in frameskipping...)

1280x360 will result in 2.13:1 aspect 1280x600
1280x320 will result in 2.40:1 aspect 1280x533 (cinemascope!)

Ultiva, just a little advice - with H.264 it is best to expose to the middle of histogram:


with RAW it is optimal to expose to the right:


To not deal with noise in underexposed areas.

btw, looking forward for RAW histogram to work in movie mode.

It works! 
Good quality: http://bit.ly/YFM92c

Max possible without dropped frames is 1280x400 24p or 960x540 24p but still looks awesome (I prefer 1280x400).

1%'s builds for 600D:
https://bitbucket.org/OtherOnePercent/tragic-lantern-2.0/downloads/