我有一些来自 Sony Nex-5N 的视频。基本上它们是在 AVCHD 中“编译”的。里面的格式是 MTS。我能够无损转换视频,但生成的 MP4 没有音频。
ffmpeg -i 20201205150626.MTS -c:v copy -c:a copy -an -f mp4 20201205150626.MP4
结果是没有音频。然后我尝试使用 -map 0:a:1
明确选择音轨,但它说它不匹配任何流。请查看以下摘录:
> ffmpeg -i 20201205150626.MTS -c:v copy -c:a copy -map 0:a:1 -an -f mp4 20201205150626.MP4
ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, mpegts, from '20201205150626.MTS':
Duration: 00:00:09.60, start: 1.020000, bitrate: 26296 kb/s
Program 1
Stream #0:0[0x1011]: Video: h264 (High) (HDPR / 0x52504448), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
Stream map '0:a:1' matches no streams.
To ignore this, add a trailing '?' to the map.
我可以看到一个音频流,它的索引是 1。我不知道发生了什么。
答案 0 :(得分:1)
您的命令行中有 -an
开关。这会从输出中移除音频。