我正在尝试跟随本指南为具有特定需求的硬件构建可用的 5.1 音频。
当我运行命令时:
ffmpeg -ar 48000 -acodec pcm_s24le -f s24le -ac 5 -i /dev/zero -i file_with_5.1_audio.mov -vcodec copy -acodec pcm_s24le -map 1:1 -filter_complex "[0:0][0:0]amerge=inputs=2[aout];[1:0][aout]amerge=inputs=2[afin]" -map [afin] -ac 16 output.mov
如图所示,我收到以下错误:
Stream specifier ':0' in filtergraph description [0:0][0:0]amerge=inputs=2[aout];[1:0][aout]amerge=inputs=2[afin] matches no streams.
这是我在出现错误之前尝试运行 FFMpeg 时的输出:
ffmpeg version N-73935-g5362df2 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
configuration: --prefix=/Volumes/tempdisk/sw --enable-gpl --enable-pthreads --disable-ffplay --disable-ffserver --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-avfilter --enable-zlib --enable-filters --arch=x86 --enable-runtime-cpudetect
libavutil 54. 28.100 / 54. 28.100
libavcodec 56. 51.100 / 56. 51.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 27.100 / 5. 27.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Guessed Channel Layout for Input Stream #0.0 : 5.0
Input #0, s24le, from '/dev/zero':
Duration: N/A, bitrate: 5760 kb/s
Stream #0:0: Audio: pcm_s24le, 48000 Hz, 5 channels, s32 (24 bit), 5760 kb/s
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/PathToFile.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2015-07-22 21:22:49
Duration: 00:00:37.54, start: 0.000000, bitrate: 26106 kb/s
Stream #1:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709), 1920x1080, 18971 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 24k tbn, 24k tbc (default)
Metadata:
creation_time : 2015-07-22 21:22:49
handler_name : Apple Alias Data Handler
encoder : Apple ProRes 422 (HQ)
timecode : 00:00:00:00
Stream #1:1(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 5.1, s32 (24 bit), 6912 kb/s (default)
Metadata:
creation_time : 2015-07-22 21:22:49
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #1:2(eng): Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2015-07-22 21:22:49
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
任何帮助都将不胜感激,我断断续续地为此工作了数周,感觉非常接近了。