ffmpeg生成的m3u8用VLC播放是黑屏

[sycru]

ffmpeg -f lavfi -i anullsrc -rtsp_transport udp -i rtsp://192.168.0.3:554/onvif1 -f hls -hls_list_size 5 -hls_time 10 -hls_wrap 10 /usr/local/nginx/html/hls/playlist.m3u8


中间有报错，但能生成文件。
[rtsp @ 0x2d237c0] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Guessed Channel Layout for Input Stream #1.1 : mono
还有
[hls @ 0x3436b20] Opening '/usr/local/nginx/html/hls/playlist0.ts' for writing
[mpegts @ 0x3447140] frame size not set
Output #0, hls, to '/usr/local/nginx/html/hls/playlist.m3u8':

还是能不断产生 文件，但用VLC播放是黑屏

 

[sycru]

root@debian11:~# ffmpeg -version
ffmpeg version N-87177-g69e6877 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-decoder=h264 --enable-decoder=h264_vdpau --enable-parser=h264 --enable-protocol=rstp --enable-demuxer=h264 --enable-nonfree
libavutil 55. 74.100 / 55. 74.100
libavcodec 57.104.101 / 57.104.101
libavformat 57. 81.100 / 57. 81.100
libavdevice 57. 8.100 / 57. 8.100
libavfilter 6.101.100 / 6.101.100
libswscale 4. 7.103 / 4. 7.103
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100