我找不到它崩溃的原因，我所拥有的只是一个动态编码为 AAC 的 mp3 文件列表。
流文件
#!/bin/bash
ffmpeg \
-stream_loop -1 -re \
-i video.mp4 \
-safe 0 \
-f concat \
-i playlist.txt \
-c:v libx264 -preset slower -b:v 3500k -maxrate 3500k -bufsize 7000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 320k -ac 2 -ar 44100 -f flv \
rtmps://---------------/s/----key----:----key----
以下是 journalctl 收集的内容：
Feb 12 18:07:57 main bash[3236855]: [47.9K blob data]
Feb 12 18:11:38 main bash[3236855]: [48.0K blob data]
Feb 12 18:15:19 main bash[3236855]: [48.0K blob data]
Feb 12 18:18:59 main bash[3236855]: [48.0K blob data]
Feb 12 18:22:41 main bash[3236855]: [48.0K blob data]
Feb 12 18:26:21 main bash[3236855]: [48.0K blob data]
Feb 12 18:30:02 main bash[3236855]: [48.0K blob data]
Feb 12 18:33:42 main bash[3236855]: [48.0K blob data]
Feb 12 18:37:23 main bash[3236855]: [48.0K blob data]
Feb 12 18:41:03 main bash[3236855]: [48.0K blob data]
Feb 12 18:44:44 main bash[3236855]: [48.0K blob data]
Feb 12 18:48:25 main bash[3236855]: [48.0K blob data]
Feb 12 18:50:07 main bash[3236855]: [22.3K blob data]
Feb 12 18:50:07 main bash[3236855]: av_interleaved_write_frame(): Input/output error
Feb 12 18:50:09 main bash[3236855]: Last message repeated 1 times
Feb 12 18:50:09 main bash[3236855]: [flv @ 0x5642d6c08c00] Failed to update header with correct duration.
Feb 12 18:50:09 main bash[3236855]: [flv @ 0x5642d6c08c00] Failed to update header with correct filesize.
Feb 12 18:50:09 main bash[3236855]: Error writing trailer of rtmps://------------/s/key:key: Input/output error
Feb 12 18:50:09 main bash[3236855]: frame=1215777 fps= 30 q=14.0 Lsize=18376958kB time=11:16:04.14 bitrate=3711.3kbits/s dup=0 drop=1 speed= 1x
Feb 12 18:50:09 main bash[3236855]: video:16828839kB audio:1495386kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.287779%
Feb 12 18:50:09 main bash[3236855]: [tls @ 0x5642d6bbcf40] The specified session has been invalidated for some reason.
Feb 12 18:50:09 main bash[3236855]: Last message repeated 1 times
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] frame I:24338 Avg QP: 3.06 size: 52975
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] frame P:393923 Avg QP: 6.45 size: 24751
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] frame B:797516 Avg QP: 9.68 size: 7767
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] consecutive B-frames: 6.8% 12.2% 15.4% 65.7%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] mb I I16..4: 47.0% 5.2% 47.9%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] mb P I16..4: 0.8% 0.5% 4.3% P16..4: 18.2% 13.6% 11.8% 4.1% 2.3% skip:44.2%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] mb B I16..4: 0.2% 0.1% 0.7% B16..8: 21.7% 14.2% 6.4% direct: 7.9% skip:48.8% L0:35.3% L1:35.8% BI:28.9%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] 8x8 transform intra:6.6% inter:16.5%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] direct mvs spatial:99.7% temporal:0.3%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] coded y,uvDC,uvAC intra: 68.9% 62.6% 52.6% inter: 36.3% 21.5% 11.4%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i16 v,h,dc,p: 70% 14% 13% 3%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 21% 19% 5% 5% 5% 6% 8% 10%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 23% 18% 5% 6% 6% 6% 6% 8%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i8c dc,h,v,p: 59% 24% 12% 5%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] Weighted P-Frames: Y:2.0% UV:0.5%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] ref P L0: 69.7% 13.7% 6.8% 3.4% 2.0% 1.8% 1.3% 1.2% 0.2% 0.0%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] ref B L0: 88.7% 7.1% 2.0% 0.9% 0.7% 0.4% 0.3%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] ref B L1: 97.2% 2.8%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] kb/s:3398.63
Feb 12 18:50:09 main bash[3236855]: [aac @ 0x5642d6bbdd40] Qavg: 14231.606
Feb 12 18:50:09 main bash[3236855]: Conversion failed!
Feb 12 18:50:09 main systemd[1]: stream.service: Main process exited, code=exited, status=1/FAILURE
Feb 12 18:50:09 main systemd[1]: stream.service: Failed with result 'exit-code'.
从该日志中很难判断在哪个点和哪个文件开始出现转换问题。
答案1
分离音频/视频，将音频提取为 .wav：
ffmpeg -i input_file.mp4 -vn audio_file.wav && ffmpeg -i input_file.mp4 -an -c copy video_file.mp4
用此连接脚本分别重新组装它们，只需wav将mp4&更改-c:a为-c:v。
ls --quoting-style=shell-always -1v *.wav > tmp.txt
sed 's/^/file /' tmp.txt > list.txt && rm tmp.txt
ffmpeg -f concat -safe 0 -i list.txt -c:a copy new_pcm_audio.wav
一旦合并了 wav 音频和视频，请使用以下命令进行多路复用：
ffmpeg -i new_video_file.mp4 -i new_pcm_audio.wav -c:v copy -c:a aac -shortest -movflags +faststart new_streaming_file.mkv
这应该可以解决所有音频问题。-c:v libx264在此处使用，您可以-c copy在流式传输时使用。