[Libav-user] one question about movenc.c

classic Classic list List threaded Threaded
2 messages Options
qw
Reply | Threaded
Open this post in threaded view
|

[Libav-user] one question about movenc.c

qw
Hi,

I have one question about movenc.c:


What does it mean, i.e. 'active picture (w/o VBI) height for D-10/IMX' ? And, what is D-10/IMX?

Thanks!

Regards

Andrew



 


_______________________________________________
Libav-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/libav-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: one question about movenc.c

Richard Hussong


On Sun, May 10, 2020 at 5:16 AM qw <[hidden email]> wrote:
Hi,

I have one question about movenc.c:


What does it mean, i.e. 'active picture (w/o VBI) height for D-10/IMX' ? And, what is D-10/IMX?

VBI stands for "vertical blanking interval", so the "height" variable includes only the true picture data, without any padding associated with vertical blanking.

D-10 and IMX are other names for the SMPTE 356M professional audio/video format. You can read a bit about it at https://en.wikipedia.org/wiki/SMPTE_356M, but you'll probably need to read the actual SMPTE document to find out why that comment is attached to the variable declaration. I know nothing about it, myself.

Thanks!

Regards

Andrew



 

_______________________________________________
Libav-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/libav-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".

_______________________________________________
Libav-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/libav-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".