On 11/26/15, Mike Grommet <[email protected]> wrote: > Hi group, here is what I'm trying to do: > > I have one background, and two videos > - I'd like to scale each video down to 320x240 > - hstack them next to each other > - overlay them over a background image > - Merge the audio from the 2 videos, and map it to the final output > > > Here is what I have so far -- but it doesn't work, I get nothing but a > blank video output. > I'm pretty inexperienced with ffmpeg, so I'm sure I'm probably missing > something dumb trying to chain all of the filters together... > > ffmpeg -i Background.png -i a.webm -i b.webm -loop 1 -filter_complex > "[0:v]overlay=0:57:shortest=1[c];[1:v]scale=320:240[left];[2:v]scale=320:240[right];[1:a][2:a]amerge=inputs=2[a];[left][right]hstack[out]" > -map [out] -map "[c]" -map "[a]" blah.webm
ffmpeg -loop 1 -i Background.png -i a.webm -i b.webm -filter_complex "[1:v]scale=320:240[left];[2:v]scale=320:240[right];[left][right]hstack[out],[v:0][out]overlay=0:57:shortest=1[video];[1:a][2:a]amerge=inputs=2[audio]" -map "[audio]" -map "[video]" blah.webm > > Any advice? I've included the initial ffmpeg output below, in case it > might be helpful. > > > ffmpeg version N-76637-gedd0c1d Copyright (c) 2000-2015 the FFmpeg > developers > built with gcc 5.2.0 (GCC) > configuration: --enable-gpl --enable-version3 --disable-w32threads > --enable-av > isynth --enable-bzlib --enable-fontconfig --enable-frei0r > --enable-gnutls --enab > le-iconv --enable-libass --enable-libbluray --enable-libbs2b > --enable-libcaca -- > enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm > --enable-l > ibilbc --enable-libmodplug --enable-libmp3lame > --enable-libopencore-amrnb --enab > le-libopencore-amrwb --enable-libopenjpeg --enable-libopus > --enable-librtmp --en > able-libschroedinger --enable-libsoxr --enable-libspeex > --enable-libtheora --ena > ble-libtwolame --enable-libvidstab --enable-libvo-aacenc > --enable-libvo-amrwbenc > --enable-libvorbis --enable-libvpx --enable-libwavpack > --enable-libwebp --enabl > e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid > --enable-libzimg -- > enable-lzma --enable-decklink --enable-zlib > libavutil 55. 5.100 / 55. 5.100 > libavcodec 57. 15.100 / 57. 15.100 > libavformat 57. 14.100 / 57. 14.100 > libavdevice 57. 0.100 / 57. 0.100 > libavfilter 6. 15.100 / 6. 15.100 > libswscale 4. 0.100 / 4. 0.100 > libswresample 2. 0.101 / 2. 0.101 > libpostproc 54. 0.100 / 54. 0.100 > [png @ 0000000000455060] Broken zTXt chunk > Last message repeated 2 times > Input #0, png_pipe, from 'FinalBackground.png': > Duration: N/A, bitrate: N/A > Stream #0:0: Video: png, rgb24(pc), 1280x720 [SAR 2834:2834 DAR > 16:9], 25 tb > r, 25 tbn, 25 tbc > Input #1, matroska,webm, from 'a.webm': > Metadata: > encoder : GStreamer matroskamux version 1.5.91 > creation_time : 2015-10-29 12:59:45 > Duration: 00:00:59.24, start: 0.000000, bitrate: 442 kb/s > Stream #1:0(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 1k > tbr, 1k > tbn, 1k tbc (default) > Metadata: > title : Video > Stream #1:1(eng): Audio: vorbis, 48000 Hz, stereo, fltp (default) > Metadata: > title : Audio > Input #2, matroska,webm, from 'b.webm': > Metadata: > encoder : GStreamer matroskamux version 1.5.91 > creation_time : 2015-10-29 12:59:45 > Duration: 00:00:59.24, start: 0.000000, bitrate: 494 kb/s > Stream #2:0(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 1k > tbr, 1k > tbn, 1k tbc (default) > Metadata: > title : Video > Stream #2:1(eng): Audio: vorbis, 48000 Hz, stereo, fltp (default) > Metadata: > title : Audio > File 'blah.webm' already exists. Overwrite ? [y/N] y > [Parsed_amerge_3 @ 00000000004c8580] No channel layout for input 1 > [Parsed_amerge_3 @ 00000000004c8580] Input channel layouts overlap: > output layout will be determined by the number of distinct input channels > [libvpx-vp9 @ 0000000002d33320] v1.5.0 > [libvpx-vp9 @ 0000000002d13560] v1.5.0 > [libopus @ 00000000004de020] No bit rate set. Defaulting to 256000 bps. > Output #0, webm, to 'blah.webm': > Metadata: > encoder : Lavf57.14.100 > Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p, 640x240 [SAR 1:1 DAR > 8:3], q= > -1--1, 200 kb/s, 1k fps, 1k tbn, 1k tbc > Metadata: > encoder : Lavc57.15.100 libvpx-vp9 > Stream #0:1: Video: vp9 (libvpx-vp9), yuv420p, 1280x720 [SAR 1:1 > DAR 16:9], > q=-1--1, 200 kb/s, 25 fps, 1k tbn, 25 tbc > Metadata: > encoder : Lavc57.15.100 libvpx-vp9 > Stream #0:2: Audio: opus (libopus), 48000 Hz, 5.0, flt, 256 kb/s > (default) > Metadata: > encoder : Lavc57.15.100 libopus > Stream mapping: > Stream #0:0 (png) -> overlay:main > Stream #1:0 (vp8) -> overlay:overlay > Stream #1:0 (vp8) -> scale > Stream #1:1 (vorbis) -> amerge:in0 > Stream #2:0 (vp8) -> scale > Stream #2:1 (vorbis) -> amerge:in1 > hstack -> Stream #0:0 (libvpx-vp9) > overlay -> Stream #0:1 (libvpx-vp9) > amerge -> Stream #0:2 (libopus) > > > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
