8
votes
Accepted
Loudness control LUFS level adjustments
FFmpeg's loudnorm filter can be used. Basic syntax is
ffmpeg -i in.mp4 -c:v copy -af loudnorm=I=-23:LRA=1 -ar 48000 out.mp4
The loudness range (LRA) should be 2 x max deviation.
Also see the ...
- 32.3k
6
votes
Software for detecting Photosensitive Epilepsy content
I wrote an ffmpeg filter which attempts to do this. It's not perfect, but it does seem to work well with a good part of the test samples I was working with.
It has now been included into ffmpeg, and ...
5
votes
Software for detecting Photosensitive Epilepsy content
Some Broadcasters require a Harding Test which is patented and proprietary, it creates a Certificate; thus getting someone to accept liability isn't going to be free.
You can find a number of places ...
- 847
4
votes
Broadcast Television - Best specs to supply news footage
ABC, NBC, Comcast and others all have their own specs. What I've found is that 1080 progressive MP4 (h.264) at 29.97 fps (some rare cases need 59.94), with audio between 192-256 Kbps, usually does the ...
- 225
3
votes
Accepted
Blackmagic setup: How do I record all cameras in a multicam broadcast?
You can use an SDI Distribution Amplifier ("DA") (one SDI input, and two or more SDI outputs) for each camera so you can "duplicate" the camera video to send to both the production switcher and to ...
- 686
3
votes
Accepted
How match this broadcast standards with Premiere and ffmpeg
To legalize video with the Video Limiter:
Set the Reduction Axis to Chroma and Luma.
Set the Signal Minimum to 0% (=0 mV).
Set the Signal Maximum to 103% (=700 mV + 3%).
The rest of the settings may ...
- 2,405
3
votes
Broadcast Television - Best specs to supply news footage
Getting a file format that works for everyone is very complicated. However, if you are are trying for network news, it is safe to use MPEG-2 TS 1080i29.97 (CBS, NBC, CNN) or 720p59.94 (ABC, Fox) at ...
- 2,405
3
votes
Best render settings for broadcast/4k TV
The reason for mastering out to an uncompressed / minimally lossy format is so that you have a master copy, which you can then use to make other copies, without generation loss, or having to re-render....
- 13.6k
2
votes
Accepted
How is 29.97 timecode generated over a full day without frame errors?
As per the Broadcast Engineer's Reference Book, p. 203
This correction will match DF time to real time to within
approximately 2.6 frames per day; to eliminate the residual error the
timecode ...
- 32.3k
2
votes
Accepted
Run webinar with more than one webcam
Webcams live in the universe of being devices plugged into computers, and switchers live in the universe of standard video sources being plugged into them. These two universes only talk to each other ...
- 4,730
2
votes
Export video for Broadcast TV
There are three different things that get called "broadcast safe":
Colors gamut: You don't need to apply an NTSC broadcast safe filter, but you do want to make sure that your colors are all within ...
- 2,405
2
votes
Export video for Broadcast TV
Depends on who you ask. Old traditional people who grew up back in the bad old analog days have the Safe Action Area and Safe Title Area embedded in their brains. But even as old analog TV receivers ...
- 686
2
votes
Http Live Streaming for beginners
I would suggest you research a bit further and then refine your question. To me it seems that there is a bit of confusion in terms of the software components needed for creating a livestream. First ...
- 639
2
votes
Accepted
Software for detecting Photosensitive Epilepsy content
Unfortunately, I don't know of any free software that checks for PSE. As of 2013, the test for PSE was only available closed source. However, all of the major commercial QC tools can check for it. (...
- 2,405
2
votes
Accepted
Correct workflow in Adobe Premiere for work with interlaced content
As for how to work... it all depends on what your final destination is. Are you working on a piece to be broadcasted, or for the Web? In the latter case, the final product should be progressive. If ...
- 156
2
votes
How match this broadcast standards with Premiere and ffmpeg
As per pg 12 of this BBC document,
TECHNICAL STANDARDS FOR DELIVERY OF TELEVISION PROGRAMMES TO BBC
The limits of signal levels are defined by reference to a nominal
black level and a nominal ...
- 32.3k
2
votes
Accepted
How can you correct EBU R128 loudness in Premiere?
In general loudness correction is a two step process. (There's a little more to it for full EBU R128 compliance, but I work exclusively in the US and this all that is required for A/85 / CALM Act ...
- 2,405
2
votes
Accepted
Hardware and internet requirements for 1080/30p streaming, if video source is external
Connection Speed
For H.264 1080p30 streaming with typical compression (6 Mbps), I would recommend an Internet upload speed of around 10 Mbps minimum.
Hardware
OBS Studio suggests the following ...
- 78
2
votes
Accepted
Retrieve and decode V-Chip data from an aired digital TV stream
V-Chip is encoded in the Extended Data Services (XDS) that is part EIA-608 captions. How it is actually transported in/with the video depends the signal type and medium.
Analog: Encoded with the ...
- 2,405
1
vote
Accepted
Spec sheet requires checksums, How should these be formatted?
There is no standard used by US broadcasters for how to format checksums. I've never delivered to a broadcaster that requires it, but I've mostly been involved in delivering commercials. DPP/AS-11 ...
- 2,405
1
vote
Video playout software and hardware requirements for simple TV channel
Cheapest solution: OBS for broadcasting, mplayer for video playback, someone who will programm simple schedule for $100. If you don't need exact schedule programming, you can just make playlists ...
- 675
1
vote
How can you correct EBU R128 loudness in Premiere?
Audition has a couple of tools that lets you measure loudness. There's the Amplitude Analysis window that lets you scan a whole mix or sound file, and tells you the LUFS loudness (which is the same as ...
- 13.6k
1
vote
What types of cables support closed captioning?
I don't mind the question. I think of it in those terms too. So HDMI, DVI, VGA no. Composite, SDI, and RF yes. Composite is typically a Yellow RCA or can be BNC coax. SDI (HD, SD, 3G) is also BNC ...
- 11
1
vote
What types of cables support closed captioning?
The closed caption information in the HDMI component is lost when you convert that digital format into a VGA signal, which is analog: The closed caption information is not injected into line 21 of ...
- 11
1
vote
Multi-source, picture-in-picture live stream
Like @screaming-drills say's: this can be done with softwares like Wirecast and OBS.
You could also get very expensive hardware to do the same eg. from Blackmagic Design, I would however look at the ...
- 226
1
vote
Multi-source, picture-in-picture live stream
Investigate some of the software switcher products such as "V-Mix". Or some of the computer-based integrated products like NewTek "TriCaster". They will handle many more inputs than even the large (...
- 686
1
vote
Resize a live stream and overlay over another live stream for broadcasting
You can do this with OBS. I do it all the time.
The Mac, can with OBS take the feed(s) and arrange/resize them and then stream it to Wirecast(?, but not necessary) or directly to Youtube.
OBS ...
- 226
1
vote
Resize a live stream and overlay over another live stream for broadcasting
How are you routing to Wirecast? SDI/HDMI to thunderbolt? An easy solution is to get a micro/mini recorder from blackmagic and pull in that second feed directly to Wirecast through thunderbolt. Then ...
- 225
1
vote
Browser-based non-webrtc webcam capture
If you can afford to buy a used BlackMagic H.264 ProCoder, it's a fantastic device, allowing you to input either a HDMI or HD-SDI signal and push to either RTMP or HTTP via h.264 -- with full control ...
- 2,477
1
vote
Browser-based non-webrtc webcam capture
as an AD.3
you can use HLS or you can use WebRTC with h264 or webm DASH
for DASH it somewhat blurry form me (no straight answer for ffmpeg), but as for the HLS this is supported in a straightforward ...
- 121
Only top scored, non community-wiki answers of a minimum length are eligible