[FFmpeg-user] Merge two videos into one with side-by-side composition

[John Crossman]

The side-by-side composition worked... Thank you!

But one problem: The video on the right is positioned too far (1) to the
right and (2) down. Thus, those edge portions of the video are chopped away.

Here is command I'm using:

*ffmpeg -i  videoLeft.mpg -i  videoRight.mpg -filter_complex
"[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w"  output.mpg
*

Any tips?

Thanks again,
John


On Mon, Jun 10, 2013 at 2:00 PM, John Crossman <johncrossman at berkeley.edu>wrote:

> Thank you, Lou! I'll give it a try and report results.
>
>
> On Mon, Jun 10, 2013 at 12:57 PM, Lou <lou at lrcd.com> wrote:
>
>> On Mon, 10 Jun 2013 09:27:22 -0700
>> John Crossman <johncrossman at berkeley.edu> wrote:
>>
>> > Is there ffmpeg documentation on how to merge two videos into one with
>> > side-by-side composition?
>> >
>> > The following is an example of what I'm after. Jump to 0:30:
>> > http://www.youtube.com/watch?v=0AJWmt5A62Y
>>
>> You can use the pad [1] and overlay [2] video filters to place your
>> videos:
>>
>> ffmpeg -i input1 -i input2 -filter_complex \
>> "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" output
>>
>> The overlay docs states:
>>
>>   Be aware that frames are taken from each input video in timestamp
>>   order, hence, if their initial timestamps differ, it is a a good
>>   idea to pass the two inputs through a setpts=PTS-STARTPTS filter to
>>   have them begin in the same zero timestamp, as it does the example
>>   for the movie filter.
>>
>> Resulting in:
>>
>> ffmpeg -i input1 -i input2 -filter_complex \
>> "[0:v]setpts=PTS-STARTPTS, pad=iw*2:ih[bg]; \
>> [1:v]setpts=PTS-STARTPTS[fg]; [bg][fg]overlay=w" output
>>
>> By default only one audio stream will be used, so if you want to combine
>> both input audio streams into one output audio stream you can use the
>> amerge [3] and pan [4] audio filters. My example has one stereo audio
>> stream per input and the output will have one combined stereo audio
>> stream:
>>
>> ffmpeg -i input1 -i input2 -filter_complex \
>> "[0:v]setpts=PTS-STARTPTS, pad=iw*2:ih[bg]; \
>> [1:v]setpts=PTS-STARTPTS[fg]; [bg][fg]overlay=w; \
>> amerge,pan=stereo:c0<c0+c2:c1<c1+c3" output
>>
>> This combination of filters is not the only method to do this, and I
>> may have forgotten something, so feel free to experiment.
>>
>> [1] http://ffmpeg.org/ffmpeg-filters.html#pad
>> [2] http://ffmpeg.org/ffmpeg-filters.html#overlay-1
>> [3] http://ffmpeg.org/ffmpeg-filters.html#amerge
>> [4] http://ffmpeg.org/ffmpeg-filters.html#pan
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>
>
>
> --
> *John Crossman*
> Educational Technology Services
> UC Berkeley
>
> Work: (510) 725-2969
> Personal: (510) 681-5483
>



-- 
*John Crossman*
Educational Technology Services
UC Berkeley

Work: (510) 725-2969
Personal: (510) 681-5483