Hi Greg.

I only have a doubt,  if you use a unique file that contains two video
streams, how to differentiate the flavours of the video streams?

You could use the resolution to put the correct flavour in an especial
prepare-av workflow operation.



2011/5/4 Greg Logan <[email protected]>

> Hi folks,
>
> I am finally at the stage where I have some media from the new Epiphan
> capture agent to test against.  The media contains two video streams and
> one audio stream in a single .avi file.  In terms of workflow at the
> core, what do I need to add or change?  Do I need to split one video out
> into its own file, or will we be able to write a workflow that does not
> require creating additional files?
>
> The output of mediainfo on the example media:
>
> General
> Complete name                    : capture.avi
> Format                           : AVI
> Format/Info                      : Audio Video Interleave
> File size                        : 1.34 MiB
> Duration                         : 11s 367ms
> Overall bit rate                 : 993 Kbps
> Writing application              : Lavf52.32.0
>
> Video #1
> ID                               : 0
> Format                           : AVC
> Format/Info                      : Advanced Video Codec
> Format profile                   : [email protected]
> Format settings, CABAC           : No
> Format settings, ReFrames        : 1 frame
> Codec ID                         : H264
> Duration                         : 11s 367ms
> Bit rate mode                    : Variable
> Bit rate                         : 817 Kbps
> Maximum bit rate                 : 600 Kbps
> Width                            : 1 920 pixels
> Height                           : 1 200 pixels
> Display aspect ratio             : 1.600
> Frame rate mode                  : Variable
> Frame rate                       : 30.000 fps / 5.000 fps
> Standard                         : NTSC
> Color space                      : YUV
> Chroma subsampling               : 4:2:0
> Bit depth                        : 8 bits
> Scan type                        : Progressive
> Bits/(Pixel*Frame)               : 0.012
> Stream size                      : 1.11 MiB (82%)
>
> Video #2
> ID                               : 2
> Format                           : AVC
> Format/Info                      : Advanced Video Codec
> Codec ID                         : H264
> Width                            : 720 pixels
> Height                           : 480 pixels
> Display aspect ratio             : 3:2
> Standard                         : NTSC
> Color space                      : YUV
> Chroma subsampling               : 4:2:0
> Stream size                      : 33.0 KiB (2%)
>
> Audio
> ID                               : 1
> Format                           : MPEG Audio
> Format version                   : Version 2
> Format profile                   : Layer 3
> Codec ID                         : 55
> Codec ID/Hint                    : MP3
> Duration                         : 11s 363ms
> Bit rate mode                    : Constant
> Bit rate                         : 128 Kbps
> Channel(s)                       : 1 channel
> Sampling rate                    : 22.05 KHz
> Stream size                      : 178 KiB (13%)
> Alignment                        : Split accross interleaves
> Interleave, duration             : 26 ms (0.78 video frame)
>
>
> G
>
>
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-- 
Un Saludo

Ruben Gonzalez Gonzalez
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