我正在尝试为youtube创建一个流。我可以看到预览按钮如何变为启用状态。但是它从未实际从离线状态变化。 它给了我几个错误。我究竟做错了什么？
ffmpeg -i video.flv -f flv rtmp://a.rtmp.youtube.com/live2/XXXXXX
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, flv, from 'video.flv':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
com.apple.quicktime.creationdate: 2017-07-20T21:44:12+0700
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 6s Plus
com.apple.quicktime.software: 10.3.2
encoder : Lavf57.83.100
Duration: 00:01:15.24, start: 0.000000, bitrate: 4454 kb/s
Stream #0:0: Video: flv1, yuv420p, 1920x1080, 200 kb/s, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: adpcm_swf, 44100 Hz, mono, s16, 176 kb/s
Output #0, flv, to 'rtmp://a.rtmp.youtube.com/XXXXXX':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
com.apple.quicktime.creationdate: 2017-07-20T21:44:12+0700
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 6s Plus
com.apple.quicktime.software: 10.3.2
encoder : Lavf56.40.101
Stream #0:0: Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080, q=2-31, 200 kb/s, 29.97 fps, 1k tbn, 29.97 tbc
Metadata:
encoder : Lavc56.60.100 flv
Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz, mono, s16p
Metadata:
encoder : Lavc56.60.100 libmp3lame
Stream mapping:
Stream #0:0 -> #0:0 (flv1 (flv) -> flv1 (flv))
Stream #0:1 -> #0:1 (adpcm_swf (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[flv @ 0x162bac0] Failed to update header with correct duration.ate=4125.4kbits/s
[flv @ 0x162bac0] Failed to update header with correct filesize.
frame= 2255 fps=114 q=31.0 Lsize= 37863kB time=00:01:15.24 bitrate=4122.0kbits/s
video:37194kB audio:588kB subtitle:0kB other streams:0kB global
标题：0kB混合开销：0.213941％
答案 0 :(得分：0)
播放视频文件时，您应使用-re选项。否则ffmpeg将尝试尽可能快地对其进行编码。
您可以尝试进行流式复制，假设您的文件格式和参数适合这样做：
ffmpeg -re -i video.flv -c copy -f flv rtmp://a.rtmp.youtube.com/live2/XXXXXX
或重新编码：
ffmpeg -re -i video.flv -c:v libx264 -b:v 4000k -maxrate 4000k -bufsize 6000k -pix_fmt yuv420p -g 60 -c:a aac -f flv rtmp://a.rtmp.youtube.com/live2/XXXXXX