[FFmpeg-user] Capturin SDI / No audio support

Moritz Barsnick barsnick at gmx.net
Mon Jul 8 19:49:23 CEST 2013

(Wow, I actually had to insert manual line breaks to read this.)

On Mon, Jul 08, 2013 at 12:56:05 +0300, juha s. wrote:

> bmdcapture -m 2 -C 0 -A 2 -V 4 -F nut -f pipe:1 | ffmpeg -re -i - -copyts -r 50 -s 640x360 -aspect 16:9 -vcodec libx264  -vprofile main -preset medium -crf 20   -b:v 1100k -maxrate 1300k -bufsize 1500k  -pix_fmt yuv420p  -y  /tmp/test.mp4
> ffmpeg version git-2012-10-02-c785b6d Copyright (c) 2000-2012 the FFmpeg developers

This is quite old. Could you try a recent version, i.e. latest snapshot
or git?

> [nut @ 0x2273280] Unknown codec tag '0x10445350' for stream number 1
> [nut @ 0x2273280] Could not find codec parameters for stream 1 (Audio: none (PSD[16] / 0x10445350), 48000 Hz, 2 channels): unknown codec

I have seen indications on the net that this should be detected as
"pcm_s16le" instead of "none", if I'm not totally mistaken. You might
want to try forcing that. But first, get a newer version of ffmpeg and
try that. :-)


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