我正在尝试将包含Opus音频的WebM文件与包含H.264视频的MP4文件合并成一个MP4文件:
ffmpeg -i audio.webm -i video.mp4 -c copy output.mp4
然而，我遇到了一个错误：
[mp4 @ 0x56105a6d0a40] opus in MP4 support is experimental, add '-strict -2' if you want to use it.
Could not write header for output file #0 (incorrect codec parameters ?): Experimental feature
完整记录：
ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9.3.0 (Arch Linux 9.3.0-1)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared --enable-version3
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, matroska,webm, from 'audio.webm':
Metadata:
ENCODER : Lavf58.29.100
Duration: 00:00:10.01, start: -0.007000, bitrate: 106 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp (default)
Metadata:
ENCODER : Lavc58.54.100 libopus
DURATION : 00:00:10.008000000
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:00:10.00, start: 0.000000, bitrate: 2796 kb/s
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2793 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
[mp4 @ 0x56105a6d0a40] track 1: codec frame size is not set
[mp4 @ 0x56105a6d0a40] opus in MP4 support is experimental, add '-strict -2' if you want to use it.
Could not write header for output file #0 (incorrect codec parameters ?): Experimental feature
Stream mapping:
Stream #1:0 -> #0:0 (copy)
Stream #0:0 -> #0:1 (copy)
Last message repeated 1 times
更新1
我尝试了这个命令:
ffmpeg -i audio.webm -i video.mp4 -c copy -strict experimental output.mp4
但是出现了一个新的错误：
[mov、mp4、m4a、3gp、3g2、mj2 @ 00000225b1eb07c0] 检测到格式 mov、mp4、m4a、3gp、3g2、mj2，得分只有1分，可能会误检测！[mov、mp4、m4a、3gp、3g2、mj2 @ 00000225b1eb07c0] 找不到 moov atom 输入视频.mp4：处理输入时发现无效数据
更新2
我发现我的输入视频已经损坏导致了更新1中的错误。
所以一旦我运行了更新1中的命令，它确实给了我一个更大的mp4文件，但文件仍然没有音频。