The VideoLAN Forums

Posted: **05 Jan 2010 16:58**

Hi!

I need capture and transcode video from HDMI via Intensity Pro
Capture tool from BlackmagicDesign SDK can output raw video (YUV) in one file, and raw audio in another file.

To transcode on-the-fly i created two fifos, /tmp/video and /tmp/audio and run Capture with following keys:

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Capture -m 6 -f /tmp/video -a /tmp/audio

VLC with the following keys:

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vlc \
-vvvvv \
-I dummy \
--demux rawvideo \
--rawvid-fps 50 \
--rawvid-width 1280 \
--rawvid-height 720 \
--rawvid-chroma=UYVY \
--repeat \
stream:///tmp/video \
--input-slave 'stream:///tmp/audio:demux=rawaudio'\
--pidfile=/tmp/vlc.pid \
--sout='#transcode{venc=x264{non-deterministic=yes,keyint=75,direct=auto,nohurry-up,nf,deblock="3:-3",me=umh,verbose,psnr},vb=8192,fps=25,width=1280,height=720,ab=128,acodec=mp4a,channels=2}:std{access=http,mux=ts,dst=:5000/stream/sdi.ts}'

VLC doesn't want to read raw audio from /tmp/audio fifo. Is there a way to capture audio and video from two separate inputs?

P.S. Capture example has the following command sample:

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Capture -m2 -n 50 -f video.raw -a audio.raw
mplayer video.raw -demuxer rawvideo -rawvideo pal:uyvy -audiofile audio.raw -audio-demuxer 20 -rawaudio rate=48000

Posted: **12 Jan 2010 17:28**

Well, slave input works, if video frames and audio packets came from regular files, not from the pipes

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#!/bin/sh

vlc \
--demux 'rawvideo' \
--rawvid-fps 50 \
--rawvid-width 1280 \
--rawvid-height 720 \
--rawvid-chroma=UYVY \
--input-slave 'stream/rawaud://./audio.raw'
stream://./video.raw \

The VideoLAN Forums

Capture audio/video from two different files

Capture audio/video from two different files

Re: Capture audio/video from two different files