我正在对包含 2 个音轨（波兰语和英语）的视频文件进行转码。不幸的是，我的转码器以某种方式弄乱了元数据，在输出中，当我使用 MediaInfo 检查视频文件时，我看到两个音轨都被描述为英语。我想将第一个音轨的描述更改为波兰语，因此根据 ffmpeg 文档：
To set the language of the first audio stream:
ffmpeg -i INPUT -metadata:s:a:0 language=eng OUTPUT
不幸的是，运行命令：
ffmpeg -i INPUTPATH -metadata:s:a:0 language=pol OUTPUTPATH
覆盖输入文件导致保存的文件大小为 63KB，但它被描述为波兰音频（没有第二个音轨 - 英语不知何故被删除了）
当我使用此命令时，将输出文件保存为另一个文件，以避免在遗漏某些内容时进行覆盖（这是当前的情况），但使用参数 -metadata:s:a:4 因为我认为我可能错误地从 ffmpeg 读取了元数据，结果将输出文件保存为 800Mb，只有英语（没有波兰语）。
我不知道我应该在这个命令中做哪些改变才能按照我想要的方式运行 - 只是将第一个音轨语言的元数据更改为波兰语。
以下是完整的 ffmpeg 输出：
C:\Users\user>ffmpeg -i F:\Path\33244813_6000_1_trailer.mp4 -metadata:s:a:4 language=pol F:\Path\testtest.mp4
ffmpeg version N-91931-gb69ea742ab Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20180813
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enabl
e-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amr
wb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enab
le-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --
enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc -
-enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --e
nable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 19.101 / 56. 19.101
libavcodec 58. 30.100 / 58. 30.100
libavformat 58. 18.100 / 58. 18.100
libavdevice 58. 4.103 / 58. 4.103
libavfilter 7. 29.100 / 7. 29.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Path\33244813_6000_1_trailer.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isom
creation_time : 2020-04-22T16:18:04.000000Z
Duration: 00:40:39.12, start: 0.000000, bitrate: 8848 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed C
aptions, 5068 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Video
Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed C
aptions, 1857 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Video
Stream #0:2(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], Closed Ca
ptions, 902 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Video
Stream #0:3(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x480 [SAR 4:3 DAR 16:9], Closed Cap
tions, 628 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Video
Stream #0:4(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Sound
Stream #0:5(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 253 kb/s (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Sound
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:5 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 00000012bef91f80] using SAR=1/1
[libx264 @ 00000012bef91f80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000012bef91f80] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 00000012bef91f80] 264 - core 157 r2932 303c484 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.vid
eolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed
_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=34 looka
head_threads=5 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b
_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookah
ead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'F:\Path\testtest.mp4'
:
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isom
encoder : Lavf58.18.100
Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps,
12800 tbn, 25 tbc (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Video
encoder : Lavc58.30.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 341 kb/s (default)
Metadata:
creation_time : 2020-04-22T16:18:04.000000Z
handler_name : Sound
encoder : Lavc58.30.100 aac
frame=60981 fps= 84 q=-1.0 Lsize= 816313kB time=00:40:39.12 bitrate=2741.7kbits/s dup=3 drop=0 speed=3.36x
video:713292kB audio:101322kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.208512%
[libx264 @ 00000012bef91f80] frame I:769 Avg QP:16.36 size: 46713
[libx264 @ 00000012bef91f80] frame P:37125 Avg QP:19.81 size: 15059
[libx264 @ 00000012bef91f80] frame B:23087 Avg QP:21.11 size: 5866
[libx264 @ 00000012bef91f80] consecutive B-frames: 40.4% 24.0% 10.2% 25.5%
[libx264 @ 00000012bef91f80] mb I I16..4: 40.3% 58.0% 1.7%
[libx264 @ 00000012bef91f80] mb P I16..4: 6.2% 12.5% 0.1% P16..4: 29.8% 3.7% 2.7% 0.0% 0.0% skip:45.0%
[libx264 @ 00000012bef91f80] mb B I16..4: 1.0% 1.7% 0.0% B16..8: 27.9% 1.1% 0.1% direct: 2.0% skip:66.2% L0:49
.4% L1:49.3% BI: 1.3%
[libx264 @ 00000012bef91f80] 8x8 transform intra:65.3% inter:95.1%
[libx264 @ 00000012bef91f80] coded y,uvDC,uvAC intra: 24.7% 39.7% 3.2% inter: 7.0% 14.6% 0.0%
[libx264 @ 00000012bef91f80] i16 v,h,dc,p: 34% 26% 13% 28%
[libx264 @ 00000012bef91f80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 15% 41% 3% 3% 4% 3% 3% 2%
[libx264 @ 00000012bef91f80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 25% 20% 3% 6% 5% 4% 3% 2%
[libx264 @ 00000012bef91f80] i8c dc,h,v,p: 58% 19% 20% 3%
[libx264 @ 00000012bef91f80] Weighted P-Frames: Y:0.1% UV:0.0%
[libx264 @ 00000012bef91f80] ref P L0: 72.2% 6.3% 15.8% 5.7% 0.0%
[libx264 @ 00000012bef91f80] ref B L0: 86.6% 11.5% 1.9%
[libx264 @ 00000012bef91f80] ref B L1: 97.6% 2.4%
[libx264 @ 00000012bef91f80] kb/s:2395.53
[aac @ 00000012bef93b00] Qavg: 471.415
答案1
您需要更多选择：
ffmpeg -i input.mp4 -map 0 -c copy -metadata:s:a:0 language=pol output.mp4
-map 0包括所有流。默认不包含-map每个类型仅包含 1 个流。请参阅FFmpeg Wiki：地图了解更多信息。-c copy到流复制而不是重新编码。
答案2
如何使用 FFMPEG.EXE 更改视频文件中的默认语言尝试这个：
ffmpeg -i FILE_IN.mp4 -map 0 -c 复制 -disposition:a:1 默认 FILE_OUT.mp4_.mp4
*它将把列表中的第二种语言设置为默认播放语言。**对于语言列表中的第三种语言，将索引更改为“2”等***运行速度快且不解码。