我正在尝试使用此处before回答的选项将srt文件添加到视频中。默认情况下，我的输入文件中有标题。我以各种方式尝试在编码的视频中启用字幕。下面是我使用的命令。
ffmpeg -i input.ts -i captions.srt -b:a 32000 -ar 48000 -force_key_frames 'expr:gte(t,n_forced*3)' -acodec libfaac -hls_flags single_file -hls_list_size 0 -hls_time 3 -vcodec libx264 -s 320x240 -b:v 512000 -maxrate 512000 -c:s mov_text outfile.ts
但是当我看到编码文件的mediainfo后，看不到标题。您可以看到我的命令的日志文件。
[mpegts @ 0x56412e67b0c0] max_analyze_duration 5000000 reached at 5024000 microseconds st:1
input.ts FPS 29.970030 1
Input #0, mpegts, from 'input.ts':
Duration: 00:03:00.07, start: 1.400000, bitrate: 2172 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: mpeg2video (Main), 1 reference frame ([2][0][0][0] / 0x0002), yuv420p(tv), 704x480 [SAR 10:11 DAR 4:3], Closed Captions, max. 15000 kb/s,
29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x101](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
Input #1, srt, from 'captions.srt':
Duration: N/A, bitrate: N/A
Stream #1:0: Subtitle: subrip
[graph 0 input from stream 0:0 @ 0x56412e678540] w:704 h:480 pixfmt:yuv420p tb:1/90000 fr:30000/1001 sar:10/11 sws_param:flags=2
[scaler for output stream 0:0 @ 0x56412e9caac0] w:320 h:240 flags:'bicubic' interl:0
[scaler for output stream 0:0 @ 0x56412e9caac0] w:704 h:480 fmt:yuv420p sar:10/11 -> w:320 h:240 fmt:yuv420p sar:1/1 flags:0x4
[graph 1 input from stream 0:1 @ 0x56412e9f74e0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[audio format for output stream 0:1 @ 0x56412e9f7b40] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format
for output stream 0:1'
[auto-inserted resampler 0 @ 0x56412e9f9f20] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:2 chl:stereo fmt:s16 r:48000Hz
[libx264 @ 0x56412e9bb8c0] VBV maxrate specified, but no bufsize, ignored
[libx264 @ 0x56412e9bb8c0] using SAR=1/1
[libx264 @ 0x56412e9bb8c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x56412e9bb8c0] profile High, level 2.0
[mpegts @ 0x56412e9ba5a0] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts
Output #0, mpegts, to 'my_encoded_all-3.ts':
Metadata:
encoder : Lavf57.25.100
Stream #0:0: Video: h264 (libx264), -1 reference frame, yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=-1--1, 512 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
Metadata:
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream #0:1(eng): Audio: aac (libfaac), 48000 Hz, stereo, s16, 32 kb/s
Metadata:
encoder : Lavc57.24.102 libfaac
Stream #0:2(eng): Subtitle: subrip (srt), 320x240
Metadata:
encoder : Lavc57.24.102 srt
Stream mapping:
Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (ac3 (native) -> aac (libfaac))
Stream #1:0 -> #0:2 (subrip (srt) -> subrip (srt))
Press [q] to stop, [?] for help
[scaler for output stream 0:0 @ 0x56412e9caac0] w:704 h:480 fmt:yuv420p sar:40/33 -> w:320 h:240 fmt:yuv420p sar:4/3 flags:0x4
No more output streams to write to, finishing.e=00:02:58.85 bitrate= 658.4kbits/s speed=13.2x
frame= 5377 fps=385 q=-1.0 Lsize= 16672kB time=00:59:16.18 bitrate= 38.4kbits/s speed= 255x
video:11401kB audio:1410kB subtitle:446kB other streams:0kB global headers:0kB muxing overhead: 25.753614%
Input file #0 (input.ts):
Input stream #0:0 (video): 5380 packets read (40279443 bytes); 5377 frames decoded;
Input stream #0:1 (audio): 5625 packets read (4320000 bytes); 5625 frames decoded (8640000 samples);
Total: 11005 packets (44599443 bytes) demuxed
Input file #1 (captions.srt):
Input stream #1:0 (subtitle): 10972 packets read (447147 bytes); 10972 frames decoded;
Total: 10972 packets (447147 bytes) demuxed
Output file #0 (output.ts):
Output stream #0:0 (video): 5377 frames encoded; 5377 packets muxed (11675098 bytes);
Output stream #0:1 (audio): 8438 frames encoded (8640000 samples); 8439 packets muxed (1444109 bytes);
Output stream #0:2 (subtitle): 10972 frames encoded; 10972 packets muxed (456619 bytes);
Total: 24788 packets (13575826 bytes) muxed
[libx264 @ 0x56412e9bb8c0] frame I:81 Avg QP:15.08 size: 16370
[libx264 @ 0x56412e9bb8c0] frame P:2312 Avg QP:17.77 size: 3393
[libx264 @ 0x56412e9bb8c0] frame B:2984 Avg QP:22.38 size: 839
[libx264 @ 0x56412e9bb8c0] consecutive B-frames: 20.6% 13.2% 9.4% 56.8%
[libx264 @ 0x56412e9bb8c0] mb I I16..4: 11.6% 37.0% 51.4%
[libx264 @ 0x56412e9bb8c0] mb P I16..4: 1.2% 3.2% 2.4% P16..4: 33.7% 18.0% 15.7% 0.0% 0.0% skip:25.6%
[libx264 @ 0x56412e9bb8c0] mb B I16..4: 0.2% 0.3% 0.2% B16..8: 30.7% 9.2% 3.2% direct: 5.1% skip:51.1% L0:33.6% L1:44.5% BI:21.9%
[libx264 @ 0x56412e9bb8c0] final ratefactor: 16.76
[libx264 @ 0x56412e9bb8c0] 8x8 transform intra:43.0% inter:49.8%
[libx264 @ 0x56412e9bb8c0] coded y,uvDC,uvAC intra: 77.9% 85.1% 68.8% inter: 22.9% 21.7% 6.0%
[libx264 @ 0x56412e9bb8c0] i16 v,h,dc,p: 30% 38% 5% 26%
[libx264 @ 0x56412e9bb8c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 23% 18% 4% 5% 7% 6% 7% 8%
[libx264 @ 0x56412e9bb8c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 23% 11% 5% 6% 8% 6% 7% 6%
[libx264 @ 0x56412e9bb8c0] i8c dc,h,v,p: 46% 24% 21% 8%
[libx264 @ 0x56412e9bb8c0] Weighted P-Frames: Y:4.2% UV:2.6%
[libx264 @ 0x56412e9bb8c0] ref P L0: 73.3% 10.9% 11.1% 4.5% 0.1%
[libx264 @ 0x56412e9bb8c0] ref B L0: 92.1% 6.3% 1.6%
[libx264 @ 0x56412e9bb8c0] ref B L1: 97.4% 2.6%
我发现编码没有问题，但看不到输出编码视频中启用的字幕。我在VLC播放器中播放过。没有字幕的音轨。
我们不能在编码时在视频中添加字幕吗？
在实现这一目标方面的任何帮助将不胜感激。