[FFmpeg-user] one encode, two outputs with different duration

[Dave P]

On Fri, Apr 10, 2015 at 9:45 AM, Bouke (VideoToolShed) <
bouke at videotoolshed.com> 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