topic libvpu: How to set sliceMode & sliceSize to fit into ethernet RTP payload? in i.MX Processors

libvpu: How to set sliceMode & sliceSize to fit into ethernet RTP payload?

salado — Wed, 19 Dec 2012 03:17:21 GMT

All,

We are doing a video application for transmitting VPU encoded H.264 data through RTP.

Our encoder setting for the slicing:

1. sliceMode = 1 (more than one slices for one frame)

2. sliceSizeMode = 0 (slice size in bits)

3. sliceSize = 1400 * 8

The VPU did output one frame with multiple slices. But the size of each slice is not controlled under 1400 bytes.

Is there anything else needs to be set to perform this?

Thanks!

Re: libvpu: How to set sliceMode & sliceSize to fit into ethernet RTP payload?

salado — Thu, 20 Dec 2012 04:26:40 GMT

bump... Anybody can help?

Re: libvpu: How to set sliceMode & sliceSize to fit into ethernet RTP payload?

donfreiling — Thu, 21 Mar 2013 22:11:47 GMT

I am also interested in the answer to this. I am currently using the same approach on the i.MX27 and it is working well. One difference is that I am setting sliceSize = 9000 to account for overhead and to add some margin. I am just now moving to the i.MX6SL and I'm counting on this mechanism to work

Re: libvpu: How to set sliceMode & sliceSize to fit into ethernet RTP payload?

rvanbrenk — Sat, 05 Aug 2023 12:33:13 GMT

Is the above method working for H264 using imx8mm hantro vpu?

I do not see multiple slices generated when I set:

sliceMode.sliceMode = 1;

sliceMode.sliceSizeMode = 0;

sliceMode.sliceSize = 9000;