我正在尝试在mp4视频和m4a音频文件之间运行合并。其他几个是正确生成的，但是这个开始并在时间00：02：54.08冻结。如果我在几分钟后停止它（ctrl + c），则output.mp4文件有0个字节。我没有很多线索为什么会发生这种情况。有人经历过类似的事吗？
[]# ffmpeg -i 91dff482-213e-45f7-84ea-a176f255c118.mp4 -i 91dff482-213e-45f7-84ea-a176f255c118.m4a -c:v copy -strict -2 -c:a aac -b:a 160k output.mp4
ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '91dff482-213e-45f7-84ea-a176f255c118.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1iso6mp41
encoder : Lavf56.25.101
Duration: 00:05:00.00, start: 0.133333, bitrate: 30 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 29 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
Metadata:
rotate : 90
handler_name : VideoHandler
Side data:
displaymatrix: rotation of -90.00 degrees
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '91dff482-213e-45f7-84ea-a176f255c118.m4a':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2iso6mp41
encoder : Lavf56.25.101
Duration: 00:05:00.15, start: 0.000000, bitrate: 14 kb/s
Stream #1:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 13 kb/s (default)
Metadata:
handler_name : SoundHandler
[aac @ 0x1b761a0] Too many bits per frame requested, clamping to max
Output #0, mp4, to 'output.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1iso6mp41
encoder : Lavf56.25.101
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 29 kb/s, 15 fps, 15 tbr, 15360 tbn, 15360 tbc (default)
Metadata:
rotate : 90
handler_name : VideoHandler
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 8000 Hz, mono, fltp, 48 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.26.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 2612 fps= 33 q=-1.0 size= 1568kB time=00:02:54.08 bitrate= 73.8kbits/s
答案 0 :(得分：0)
运行
ffmpeg -ss 02:50 -i video -ss 02:50 -i audio -c:v copy -strict -2 -c:a aac -b:a 160k test.mp4.
如果在几秒钟后停止，则其中一个比特流中存在一些异常，您将不得不重新输入一个或两个输入文件，然后重试，即
。ffmpeg -i video -c copy -an newvideo.mp4
ffmpeg -i audio -c copy -vn newaudio.mp4