---- Original Message -----
From: "Dave P" <[email protected]>
To: "FFmpeg user questions" <[email protected]>
Sent: Friday, April 10, 2015 10:45 PM
Subject: Re: [FFmpeg-user] one encode, two outputs with different duration
On Fri, Apr 10, 2015 at 9:45 AM, Bouke (VideoToolShed) <
[email protected]> wrote:
Trying to do one encode to two outputs, where one is significantly
shorter
than the other.
(I want to give end users a sneak preview before the whole shebang is
done.)
I got it working using the command line below, but the trouble is, the
shorter file is still in use by FFmpeg untill the entire encode is done,
that kinda defeats the whole dance.
So i think i must split the output of the encode and feed it to another
instance, but have no idea how.
I've also tried this with -tee "output1.mov| [t=120]output2.mov" , but
the
[t=120] failed...
Any ideas / insights?
(Oh, this is supposed to run on OSX as well as Windows)
thx,
Bouke
ffmpeg.exe -threads 0 -i M:\Honig\02-02c.mxf -filter_complex
"scale=480x360"
-vcodec mjpeg -qscale 4 -map_channel 0.1.0 -map_channel 0.2.0 -acodec
pcm_s16le -aspect 16:9
-timecode 01:00:00:00 -f avi - | ffmpeg.exe -i - -c copy -t 20
M:\Honig\02-02c_short.mov
-c copy M:\Honig\02-02c_long.mov
Maybe something like this?
ffmpeg.exe -threads 0 \
-i M:\Honig\02-02c.mxf \
-vf scale=480x360 \
-vcodec mjpeg \
-qscale 4 \
-map_channel 0.1.0 \
-map_channel 0.2.0 \
-acodec pcm_s16le \
-aspect 16:9 \
-timecode 01:00:00:00 \
-t 20 \
M:\Honig\02-02c_short.mov \
-vf scale=480x360 \
-vcodec mjpeg \
-qscale 4 \
-map_channel 0.1.0 \
-map_channel 0.2.0 \
-acodec pcm_s16le \
-aspect 16:9 \
-timecode 01:00:00:00 \
M:\Honig\02-02c_long.mov
Nope, sorry, bu that encodes twice, and has the same problem that the first
file is still in use.
Even funnier, according to the speed the first (short) file still eats
resources, while the output isn't going anywhere.
So i still think i need to pipe the output to multiple instances of FFmpeg.
Bouke
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