[FFmpeg-user] Encode to Side by Side Video

[Kyle Schwarz]

On Wed, May 30, 2012 at 3:18 PM, Lou <lou at lrcd.com> wrote:
>
> On Wed, 30 May 2012 17:49:19 +0000 (UTC)
> Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
>
> > Kyle <kshawkeye <at> gmail.com> writes:
> >
> > > I'm wondering if FFmpeg can encode two different videos
> > > into one video that plays both side by side?
> >
> > Did you try the video filter system?
> > Overlay worked fine when I tried it once.
> >
> > Carl Eugen
>
> Overlay as Carl mentioned:
> ffmpeg -i right.mp4 -filter:v
> "[in]setpts=PTS-STARTPTS,pad=iw*2:ih:iw:0,[T1]overlay=0:0[out];movie=left.mp4,setpts=PTS-STARTPTS[T1]"
> output

I tried the given example and got:
ffmpeg -y
 -i "input-1.flv" -filter:v "[in]setpts=PTS-STARTPTS,pad=iw*2:ih:iw:0,[T1]overla
y=0:0[out];movie=input-2.flv,setpts=PTS-STARTPTS[T1]" output.mp4
ffmpeg version N-41195-g8a0efa9 Copyright (c) 2000-2012 the FFmpeg developers
  built on May 31 2012 20:10:06 with gcc 4.6.3
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3
 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzli
b --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --
enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lam
e --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger
 --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc
--enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --en
able-libxavs --enable-libxvid --enable-zlib
  libavutil      51. 55.100 / 51. 55.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.101 / 54.  6.101
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, flv, from 'input-1.flv':
  Metadata:
    starttime       : 0
    totalduration   : 474
    totaldatarate   : 1005
    bytelength      : 59533158
    canseekontime   : true
    sourcedata      : B4A7D0021HH1338775178100633
    purl            :
    pmsg            :
  Duration: 00:07:53.76, start: 0.000000, bitrate: 1005 kb/s
    Stream #0:0: Video: h264 (Main), yuv420p, 854x480, 890 kb/s, 25 tbr, 1k tbn,
 50 tbc
    Stream #0:1: Audio: aac, 44100 Hz, stereo, s16, 130 kb/s
[movie @ 0000000002bfdd80] seek_point:0 format_name:(null) file_name:input-2.flv
 stream_index:0
[buffer @ 000000000092e2e0] w:854 h:480 pixfmt:yuv420p tb:1/1000 sar:0/1 sws_par
am:flags=2
[buffersink @ 000000000092e5e0] No opaque field provided
[overlay @ 0000000002ed7cc0] auto-inserting filter 'auto-inserted scaler 0' betw
een the filter 'Parsed_pad_1' and the filter 'Parsed_overlay_2'
[movie @ 0000000002bfdd80] TB:0.001000
[buffer @ 000000000092e2e0] TB:0.001000
[pad @ 0000000002ed7c40] w:854 h:480 -> w:1708 h:480 x:854 y:0 color:0x000000FF
[scale @ 0000000000533320] w:1708 h:480 fmt:yuv420p sar:0/1 -> w:1708 h:480 fmt:
yuva420p sar:0/1 flags:0x4
[overlay @ 0000000002ed7cc0] main w:854 h:480 fmt:yuv420p overlay x:0 y:0 w:1708
 h:480 fmt:yuva420p
[overlay @ 0000000002ed7cc0] Overlay area (0,0)<->(1708,480) not within the main
 area (0,0)<->(854,480) or zero-sized
Error opening filters!

I also tried the first example given in the doc for libavfilter and
that also failed with a similar message.

Any ideas?

Best regards,
  Kyle Schwarz