On 1/21/2019 2:45 PM, Moritz Barsnick wrote:
On Mon, Jan 21, 2019 at 14:01:52 -0500, Jim Shupert wrote:
if it is in 4 streams you can pick which to hear.
My capture system captures 10bit unc mov video [0:0] ( 4ch_test.mov )
and the 4 audio "tracks" are found in 1 stream as 4 channels [0:1.0 ,
0:1.1, 0:1.2, 0:1.3 ]
[...]
Do you need the intermediate file 4s_b.avi? (I assume so, but your
final file 4s_b.mp4 can be created in one step, if that is desired.)
Yes - both the ffv1 avi [ 4s_b.avi ] & the mp4 are the goal , the need.
the original capture mov [ 4ch_test.mov ] is very simply what I am
"able" to make via my hardware
which is a blackmagic card running media express. That is I can capture
all 4 "tracks" but only & always into 1 stream with 4 channels
---------------------------:: make the ffv1 avi from the 10b mov capture .
4s_b.avi
ffmpeg -i 4ch_test.mov -vcodec ffv1 -level 3 -coder 1 -pix_fmt
yuv422p10le -aspect 4:3 -g 1 \
-filter_complex "[0:a]pan=mono|c0=c0[a0]; [0:a]pan=mono|c0=c1[a1];
[0:a]pan=mono|c0=c2[a2]; [0:a]pan=mono|c0=c3[a3]" \
-map 0:v -map "[a0]" -map "[a1]" -map "[a2]" -map "[a3]" -map 0:d -c
copy -c:a pcm_s24le -f avi 4s_b.avi
Your filter
"[0:a]pan=mono|c0=c0[a0]; [0:a]pan=mono|c0=c1[a1]; [0:a]pan=mono|c0=c2[a2];
[0:a]pan=mono|c0=c3[a3]"
is indeed a neat trick to separate your channels into streams. There's
an easier way though: The "channelsplit" filter:
https://ffmpeg.org/ffmpeg-filters.html#channelsplit
The second filter ("[0:1] [0:2] amerge") is just fine for creating
stereo from two separate channels.
ahhhh :: an "an easier way" wonderful -- in truth I often find there
are many "ways" ... i tend to keep using "one" after I find it works.
Thank you...expanding my understanding is what i am after
https://trac.ffmpeg.org/wiki/AudioChannelManipulation
Apparently, you read the section "stereo → 2 × mono files". My
suggestion with the "channelsplit" is right below, in the section
"stereo → 2 × mono streams". Actually, both filters will work either
way, the examples are quite arbitrary, come to think of it.
will do -- thanks again
and-- if anyone else has anyThing else to offer ... i am still anxious
to learn more
:)
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