新しい問題 Audacity の新しい FFMPEG で、8 チャンネルを 7.1 にエクスポートすると、23 分で切れてしまいます。その2時間の長いトラック。終わり近くで 1.x になり、十分なディスク容量がありますが、何が問題なのかわかりません。
ffmpeg -i - -strict experimental -c:a aac -b:a 240k "F:\Something.aac"
ffmpeg version N-82966-g6993bb4 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 43.100 / 55. 43.100
libavcodec 57. 70.100 / 57. 70.100
libavformat 57. 61.100 / 57. 61.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 68.100 / 6. 68.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Guessed Channel Layout for Input Stream #0.0 : 7.1
Input #0, wav, from 'pipe:':
Duration: N/A, bitrate: 5644 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 7.1, s16, 5644 kb/s
Output #0, adts, to 'F:\Something.aac':
Metadata:
encoder : Lavf57.61.100
Stream #0:0: Audio: aac (LC), 44100 Hz, 7.1, fltp, 240 kb/s
Metadata:
encoder : Lavc57.70.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))
size= 63kB time=00:00:02.18 bitrate= 237.6kbits/s speed= 4.3x
size= 117kB time=00:00:03.99 bitrate= 240.0kbits/s speed=3.96x
size= 145kB time=00:00:04.94 bitrate= 240.3kbits/s speed= 2.4x
size= 193kB time=00:00:06.57 bitrate= 240.8kbits/s speed=2.57x
size= 249kB time=00:00:08.45 bitrate= 241.1kbits/s speed=2.76x
size= 293kB time=00:00:09.96 bitrate= 241.3kbits/s speed=2.45x
size= 353kB time=00:00:11.98 bitrate= 241.5kbits/s speed=2.62x
size= 386kB time=00:00:13.09 bitrate= 241.6kbits/s speed=2.58x
size= 441kB time=00:00:14.95 bitrate= 241.7kbits/s speed=2.42x
size= 506kB time=00:00:17.13 bitrate= 241.7kbits/s speed=2.57x
size= 575kB time=00:00:19.48 bitrate= 241.8kbits/s speed=2.72x
size= 589kB time=00:00:19.94 bitrate= 241.9kbits/s speed=2.53x
size= 655kB time=00:00:22.17 bitrate= 241.9kbits/s speed=2.65x
size= 736kB time=00:00:24.91 bitrate= 241.9kbits/s speed=2.81x
size= 737kB time=00:00:24.96 bitrate= 241.9kbits/s speed=2.63x
size= 809kB time=00:00:27.39 bitrate= 242.0kbits/s speed=2.74x
size= 885kB time=00:00:29.95 bitrate= 242.0kbits/s speed=2.71x
size= 31922kB time=00:17:56.36 bitrate= 243.0kbits/s speed=3.15x
size= 31991kB time=00:17:58.70 bitrate= 243.0kbits/s speed=3.15x
size= 32029kB time=00:17:59.96 bitrate= 243.0kbits/s speed=3.14x
size= 32053kB time=00:18:00.77 bitrate= 243.0kbits/s speed=3.14x
size= 32084kB time=00:18:01.84 bitrate= 243.0kbits/s speed=3.14x
size= 32116kB time=00:18:02.88 bitrate= 243.0kbits/s speed=3.14x
size= 32144kB time=00:18:03.83 bitrate= 243.0kbits/s speed=3.14x
size= 32177kB time=00:18:04.95 bitrate= 243.0kbits/s speed=3.13x
size= 32248kB time=00:18:07.34 bitrate= 243.0kbits/s speed=3.13x
.... Repeat of much of the same 3.0x throughout
size= 40419kB time=00:22:42.89 bitrate= 242.9kbits/s speed=3.03x
size= 40449kB time=00:22:43.91 bitrate= 242.9kbits/s speed=3.03x
size= 40480kB time=00:22:44.96 bitrate= 242.9kbits/s speed=3.03x
size= 40557kB time=00:22:47.56 bitrate= 242.9kbits/s speed=3.03x
size= 40628kB time=00:22:49.95 bitrate= 242.9kbits/s speed=3.03x
size= 40719kB time=00:22:53.01 bitrate= 242.9kbits/s speed=3.03x
size= 40751kB time=00:22:54.11 bitrate= 242.9kbits/s speed=1.06x
size= 40753kB time=00:22:54.15 bitrate= 242.9kbits/s speed=1.06x
video:0kB audio:40348kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.002666%
[aac @ 00000000026d5aa0] Qavg: 331.324