amazon-web-services - ffmpeg硬编码字幕，无字幕但无输出错误

Question

我正在尝试使用外部 SRT 字幕文件对 mp4 文件的字幕进行硬编码。尽管获得了成功的输出结果：

video:3923kB audio:975kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.344595%
[libx264 @ 0x63b08c0] frame I:9     Avg QP:15.65  size: 31298
[libx264 @ 0x63b08c0] frame P:609   Avg QP:20.37  size:  4283
[libx264 @ 0x63b08c0] frame B:1242  Avg QP:23.74  size:   907
[libx264 @ 0x63b08c0] consecutive B-frames:  3.3% 15.4% 23.1% 58.3%
[libx264 @ 0x63b08c0] mb I  I16..4: 21.5% 54.0% 24.5%
[libx264 @ 0x63b08c0] mb P  I16..4:  1.2%  2.7%  0.3%  P16..4: 18.7%  4.2%  1.6%  0.0%  0.0%    skip:71.4%
[libx264 @ 0x63b08c0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8: 13.9%  0.6%  0.0%  direct: 0.1%  skip:85.2%  L0:41.5% L1:56.8% BI: 1.7%
[libx264 @ 0x63b08c0] 8x8 transform intra:62.4% inter:86.2%
[libx264 @ 0x63b08c0] coded y,uvDC,uvAC intra: 36.7% 53.0% 15.0% inter: 2.2% 3.1% 0.1%
[libx264 @ 0x63b08c0] i16 v,h,dc,p: 42% 20% 13% 25%
[libx264 @ 0x63b08c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 15% 28%  3%  4%  6%  4%  5%  3%
[libx264 @ 0x63b08c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 23% 14%  4%  6%  7%  5%  4%  2%
[libx264 @ 0x63b08c0] i8c dc,h,v,p: 51% 17% 26%  6%
[libx264 @ 0x63b08c0] Weighted P-Frames: Y:0.2% UV:0.2%
[libx264 @ 0x63b08c0] ref P L0: 69.1%  9.6% 15.1%  6.1%
[libx264 @ 0x63b08c0] ref B L0: 87.2% 10.7%  2.1%
[libx264 @ 0x63b08c0] ref B L1: 97.9%  2.1%
[libx264 @ 0x63b08c0] kb/s:517.69
[aac @ 0x63b3600] Qavg: 257.742

但是，一旦我用任何播放器播放视频，字幕就不存在了。

这是我用于任务的命令

ffmpeg -i https://some-bucket.s3.region.amazonaws.com/my-video.mp4 -f mp4 -vf subtitles=sub.srt subtitled-video.mp4

标签： amazon-web-servicesffmpeg

Answer 1

此代码用于添加字幕，然后您必须选择选项字幕（如流#0：2（und）：字幕：mov_text）

ffmpeg -i input.mp4 -i sub.srt -map 0 -map 1 -c copy -c:s mov_text  subtitled-video.mp4

这个选项为同一个视频添加字幕，并且将永远有字幕，但首先你必须在 .ass （手动图形编辑）中更改 .srt （文本字幕），你知道，文本到图形：

ffmpeg -i sub.srt sub.ass

然后您可以创建带有内部字幕的视频

ffmpeg -i input.mp4 -vf "ass=sub.ass" out.mp4

堆栈问候