2つのflvファイルを入力として受け取り、出力を作成し、両方のビデオを同時に再生するffmpegでオーバーレイを実現しようとしています。以下のffmpegコマンドで問題なく動作しています:
ffmpeg -i input1.flv -vf "[in] scale=359:320, pad=2*iw+6:ih [left]; movie=input2.flv, scale=359:320 [right]; [left][right] overlay=365:0 [out]" -b:v 3600k -y output.flv
しかし、問題は 2 番目のビデオのサウンドにあり、それは から欠落してoutput.flv
いoutput.flv
ます。
コンソール出力は次のとおりです。
ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3
--disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib
--enable-frei0r --enable-libass --enable-lib`enter code here`opencore-amrnb --enable-libopencore-
amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut -
-enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger -
-enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --
enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enab
le-libxavs --enable-libxvid --enable-zlib
libavutil 52. 9.100 / 52. 9.100
libavcodec 54. 77.100 / 54. 77.100
libavformat 54. 37.100 / 54. 37.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 23.102 / 3. 23.102
libswscale 2. 1.102 / 2. 1.102
libswresample 0. 17.101 / 0. 17.101
libpostproc 52. 2.100 / 52. 2.100
Input #0, flv, from 'input1.flv':
Metadata:
canSeekToEnd : false
createdby : FMS 4.0
creationdate : Mon Jan 07 07:05:40 2013
encoder : Lavf54.37.100
Duration: 00:03:04.81, start: 0.000000, bitrate: 314 kb/s
Stream #0:0: Video: flv1, yuv420p, 160x120, 3600 kb/s, 1k tbr, 1k tbn, 1k tb
c
Stream #0:1: Audio: mp3, 22050 Hz, mono, s16, 32 kb/s
Output #0, flv, to 'output.flv':
Metadata:
canSeekToEnd : false
createdby : FMS 4.0
creationdate : Mon Jan 07 07:05:40 2013
encoder : Lavf54.37.100
Stream #0:0: Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 724x320, q=2-31,
3600 kb/s, 1k tbn, 1k tbc
Stream #0:1: Audio: mp3 ([2][0][0][0] / 0x0002), 22050 Hz, mono, s16p
Stream mapping:
Stream #0:0 -> #0:0 (flv -> flv)
Stream #0:1 -> #0:1 (mp3 -> libmp3lame)
Press [q] to stop, [?] for help
frame= 120 fps=0.0 q=4.5 size= 550kB time=00:00:08.57 bitrate= 525.3kbits/s
frame= 225 fps=221 q=2.0 size= 1422kB time=00:00:18.26 bitrate= 637.6kbits/s
Buffer queue overflow, dropping.
[Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
Last message repeated 1 times
frame= 338 fps=222 q=2.0 size= 2414kB time=00:00:26.97 bitrate= 733.0kbits/s
Buffer queue overflow, dropping.
[Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
Last message repeated 12 times
frame= 452 fps=223 q=2.0 size= 3326kB time=00:00:35.38 bitrate= 770.1kbits/s
frame= 562 fps=223 q=2.0 size= 4246kB time=00:00:43.15 bitrate= 806.0kbits/s
Buffer queue overflow, dropping.
[Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
Last message repeated 11 times
frame= 669 fps=221 q=2.0 size= 5237kB time=00:00:51.28 bitrate= 836.6kbits/s
frame= 777 fps=220 q=2.0 size= 6105kB time=00:00:58.75 bitrate= 851.2kbits/s
frame= 893 fps=222 q=2.0 size= 6897kB time=00:01:06.72 bitrate= 846.8kbits/s
frame= 1006 fps=222 q=2.0 size= 7701kB time=00:01:14.60 bitrate= 845.6kbits/s
frame= 1121 fps=223 q=2.0 size= 8539kB time=00:01:22.45 bitrate= 848.3kbits/s
frame= 1235 fps=223 q=2.0 size= 9316kB time=00:01:30.39 bitrate= 844.3kbits/s
frame= 1344 fps=223 q=2.0 size= 10135kB time=00:01:37.98 bitrate= 847.3kbits/s
Buffer queue overflow, dropping.
[Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
Last message repeated 33 times
frame= 1437 fps=220 q=2.0 size= 10800kB time=00:01:46.67 bitrate= 829.3kbits/s
frame= 1540 fps=219 q=2.0 size= 11577kB time=00:01:54.16 bitrate= 830.7kbits/s
frame= 1651 fps=219 q=2.0 size= 12330kB time=00:02:01.64 bitrate= 830.3kbits/s
frame= 1756 fps=218 q=2.0 size= 13141kB time=00:02:09.06 bitrate= 834.1kbits/s
frame= 1859 fps=217 q=2.0 size= 13879kB time=00:02:16.28 bitrate= 834.3kbits/s
frame= 1962 fps=217 q=2.0 size= 14703kB time=00:02:23.69 bitrate= 838.2kbits/s
frame= 2070 fps=217 q=2.0 size= 15448kB time=00:02:30.98 bitrate= 838.2kbits/s
frame= 2176 fps=216 q=2.0 size= 16241kB time=00:02:38.46 bitrate= 839.6kbits/s
Buffer queue overflow, dropping.
[Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
Last message repeated 20 times
frame= 2275 fps=215 q=2.0 size= 16990kB time=00:02:46.78 bitrate= 834.5kbits/s
frame= 2389 fps=216 q=1.6 size= 17784kB time=00:02:54.44 bitrate= 835.1kbits/s
frame= 2493 fps=216 q=2.0 size= 18555kB time=00:03:01.73 bitrate= 836.4kbits/s
frame= 2534 fps=216 q=2.0 Lsize= 18945kB time=00:03:04.81 bitrate= 839.7kbits/
s
video:18227kB audio:588kB subtitle:0 global headers:0kB muxing overhead 0.691204
%
-map は、両方のビデオのオーディオ処理用のフィルターだと思います。このリンクを参照してください。