Shooting for broadcast

mainstreetprod

mainstreetprod

Veteran
I haven't shot for broadcast in over 10 years, so I'm a bit rusty. Here are the specs I've been given:



Format: AVI or MOV ONLY (MPEG2 Transport Stream)
• Size: 100MB or less
• Duration: 30 and 60 seconds- THESE FINAL RUN TIMES MUST BE EXACT FOR
THE TRAILERS TO BE APPROVED AND ACCEPTED.
Video:
• Resolution:
- 720 x 480 @ 29.97fps (NTSC)
- frame aspect ratio: 4:3
- pixel aspect ratio: 0.9
• Upper/Top/Odd field first
• Codec: AVC H.264 (Main Profile 3.0), MPEG-2 (Main Profile @ Main Level),
Uncompressed/RAW (except V210/10-bit), DVVIDEO
• Bitrate: At least 6Mbps (CBR).
• Luma should occupy full spectrum between NTSC standard 7.5 IRE black and white
level at 100 IRE
• # of frames for NTSC format
30 sec ad: 900 frames
60 sec ad: 1800 frames
• Text overlays should be title-safe
Audio:
• Samples: 48Khz, 16bits
• Dynamic Range: no greater than 7dB
• Codec: MPEG1-Layer 2, AAC, PCM
• Bitrate: At least 256kbps
• Number of channels: 2 (stereo)




Questions: Is the AF-100 set for 7.5 IRE by default?

Under codec, is it giving me a choice of 4 different codecs to shoot in (H264, MPEG-2, Uncompressed and DV)?


Any more advice to help me get this right the first time?
 
Questions: Is the AF-100 set for 7.5 IRE by default?
Click to expand...


Thats an issue for post production. You broadcast legalise the video at edit mastering stage

Under codec, is it giving me a choice of 4 different codecs to shoot in (H264, MPEG-2, Uncompressed and DV)?
Click to expand...

Thats another issue for post production. You shoot what you want and master the video to any of those specs. They have given you a choice in that regard.

Note: Specs vary between broadcasters.
 
All of those instructions are for delivery - so they are for the post production people to worry about.

To help them along though there are two important bits of info you need to account for - Frame Rate and Aspect Ratio.

Shooting 29.97fps is easy - the AF101 can do that (either as interlaced or progressive - they don't state a preference)

To shoot 4x3 is different. The AF101 (and the HD specification in general) doesn't really support 4x3 so I would shoot 16x9 and mark 4x3 safe on your monitors (a couple of bits of tape will do this). The edges can then be cropped in post.
 
You only add setup and go to 7.5 IRE if you are delivering on analog tape such as Beta SP.
if you are delivering a digital product such as an ftp transfer then your blacks should be at 0 IRE.
 
Gary Askham said:
All of those instructions are for delivery - so they are for the post production people to worry about.

To help them along though there are two important bits of info you need to account for - Frame Rate and Aspect Ratio.

Shooting 29.97fps is easy - the AF101 can do that (either as interlaced or progressive - they don't state a preference)

To shoot 4x3 is different. The AF101 (and the HD specification in general) doesn't really support 4x3 so I would shoot 16x9 and mark 4x3 safe on your monitors (a couple of bits of tape will do this). The edges can then be cropped in post.[/QUOTE]



Since I also own an HVX, would I be better off to just shoot on it at 4:3?


You only add setup and go to 7.5 IRE if you are delivering on analog tape such as Beta SP.
if you are delivering a digital product such as an ftp transfer then your blacks should be at 0 IRE.


Gotcha. Is the default on Panasonic cameras set at 0 IRE or 7.5?
Click to expand...
 
We're shooting to the PBS T&O spec.

http://www.pbs.org/producers/TOS-1-2010-Submission-to-PBS.pdf

In the US, 1080i at 59.94 is a good way to shoot because some HD broadcasters
are 720p and some are 1080i. The ~800lines on the AF100 are fine.

The encode parameters differ .. but your post guy can take care of that. Watch your
audio .. more submissions get kicked back for audio than you would imagine.

jeff
 
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