2 FFMPEG处理
2 FFMPEG process
(1)将ffmpeg x11grab生成为.mp4(2)提取.mp4并将其同时流式传输到多个rtmp端点
(1) generating a ffmpeg x11grab to a .mp4 (2) take the .mp4 and restream it simultaneously to multiple rtmp endpoints
问题 (1)中生成的文件出现此错误找不到Moov原子"
ISSUE the generated file in (1) have this error "moov atom not found"
这是生成(1)的命令:
This is the command that generate (1) :
ffmpeg -re -y -f x11grab -draw_mouse 0 -framerate 30 -video_size $RESOLUTION -i :$DISPLAY_NUM -c:a aac -c:v libx264 -movflags +faststart -preset ultrafast -crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p -filter:v fps=30 file.mp4(2)中的
=>当我尝试在某处输出ffmpeg -i file.mp4时:因此(2)无法读取或打开(1).
in the (2) => when I try to ffmpeg -i file.mp4 output somewhere: I get "moov atom not found" so the (2) can't read or open (1).
我想念的东西
在(1)个 -movflags + faststart 中似乎无法解决该问题
in (1) -movflags +faststart doesn't seem to fix the issue
•••••••有关上下文的更多详细信息••••••
••••••• EDIT : more details on the context ••••••
我正在使用openvidu:具有kurento和coturn的webrtc.
I'm using openvidu : webrtc with kurento and coturn.
随着聊天的进行，录制功能会即时创建一个.mp4.
The record feature creates a .mp4 on the fly as the chat is going on.
要开始录制，我可以对服务器进行一次API调用，当所有用户都离开聊天室或进行其他api调用来停止时，它会自动停止.请参阅此链接中的合成视频 docs.openvidu.io/en/2.17.0/advanced-features/recording/
To start the recording, there is an API call i can make to my server and it automatically stops when all users leaves the chatroom OR do an other api call to stop. see composed video in this link docs.openvidu.io/en/2.17.0/advanced-features/recording/
openvidu也有webhooks.
openvidu have also webhooks.
我的问题不是如何停止ffmpeg，而是在动态"生成mp4或其他文件时让FFMPEG进行编码.
My problem is not how to stop ffmpeg, but getting FFMPEG to encode while the mp4 or other is being generated "on the fly".
有2个选项:
选项1:个人=>每个camare 1 .webm =>这个.webm ffmpeg可以像hls或RTMP =>一样重播.它正在工作.
OPTION 1: individual => 1 .webm per camare => this .webm ffmpeg can restream as hls or RTMP => it's working.
选项2:**，但问题在于已组成"视频=>它正在使用ffmpeg对会话进行x11抓取...但是它是没有moov ato的mp4，因此ffmpeg对此不做任何事情.
OPTION 2: ** but the issue is with "Composed" video => it's using ffmpeg to x11grab the session... but it's mp4 without moov ato, so ffmpeg don't do anything with this.
请参阅此处的composition.sh脚本 github/OpenVidu/openvidu/blob/master/openvidu-server/docker/openvidu-recording/scripts/composed.sh
see the composed.sh script here github/OpenVidu/openvidu/blob/master/openvidu-server/docker/openvidu-recording/scripts/composed.sh
*****************编辑3 *************
***************** EDIT 3 *************
在.sh中，这是创建mp4的部分
in the .sh this is the part that is creating the mp4
ffmpeg -y -f alsa -i脉冲-f x11grab -draw_mouse 0-framerate $ FRAMERATE -video_size $ RESOLUTION -i:$ DISPLAY_NUM-c:a aac -c:v libx264-预设超快-crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p-filter:v fps = $ FRAMERATE
ffmpeg -y -f alsa -i pulse -f x11grab -draw_mouse 0 -framerate $FRAMERATE -video_size $RESOLUTION -i :$DISPLAY_NUM -c:a aac -c:v libx264 -preset ultrafast -crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p -filter:v fps=$FRAMERATE "/recordings/$VIDEO_ID/$VIDEO_NAME.$VIDEO_FORMAT"
我该如何修改它以得到质量更好的.webm更好的示例VP8或VP9，以便ffpmeg第二个命令(2)可以对其进行实时编码...
How can I modify this to have better result example VP8 or VP9 with good quality .webm so that the ffpmeg second command(2) can encode it live...
****编辑4 ********
**** EDIT 4 ********
我尝试了30秒钟，但突然停了
I tried this it worked for 30 seconds and suddenly stopped
<./stop ffmpeg -y -f alsa -i pulse -f x11grab -draw_mouse 0 -framerate $FRAMERATE -video_size $RESOLUTION -i :$DISPLAY_NUM -c:v libx264 -b:v 1396k -b:a 128k -ar 44100 -maxrate 1369k -pix_fmt yuv420p -preset veryfast -tune zerolatency -c:a aac -ac 2 -profile:v main -flags -global_header -bufsize 969k -hls_time 1 -hls_list_size 0 -g 30 -start_number 0 -streaming 1 -hls_playlist 1 -lhls 1 -hls_playlist_type event -f hls "/recordings/$VIDEO_ID/$VIDEO_NAME".m3u8 N: [pulseaudio] main.c: Running in system mode, forcibly disabling SHM mode. N: [pulseaudio] main.c: Running in system mode, forcibly disabling exit idle time. Display in use -> :99 ---------------------------------------- ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from 'pulse': Duration: N/A, start: 1617150428.783763, bitrate: 1536 kb/s Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s [x11grab @ 0x55e88a4e8780] Stream #0: not enough frames to estimate rate; consider increasing probesize Input #1, x11grab, from ':99': Duration: N/A, start: 1617150428.837799, bitrate: N/A Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 30 fps, 1000k tbr, 1000k tbn, 1000k tbc Stream mapping: Stream #1:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native)) Press [q] to stop, [?] for help [libx264 @ 0x55e88a4f70c0] max bitrate less than average bitrate, assuming CBR [libx264 @ 0x55e88a4f70c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512 [libx264 @ 0x55e88a4f70c0] profile Main, level 4.0 [alsa @ 0x55e88a4c2e40] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8) [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619940.ts' for writing Output #0, hls, to '/recordings/13391978436095-2/rec13390362561994.m3u8': Metadata: encoder : Lavf58.29.100 Stream #0:0: Video: h264 (libx264), yuv420p(progressive), 1920x1080, q=-1--1, 1396 kb/s, 30 fps, 90k tbn, 30 tbc Metadata: encoder : Lavc58.54.100 libx264 Side data: cpb: bitrate max/min/avg: 1369000/0/1396000 buffer size: 969000 vbv_delay: -1 Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc58.54.100 aac frame= 16 fps=0.0 q=21.0 size=N/A time=00:00:00.53 bitrate=N/A speed=1.06x frame= 31 fps= 31 q=16.0 size=N/A time=00:00:01.03 bitrate=N/A speed=1.02x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619941.ts' for writing frame= 47 fps= 31 q=21.0 size=N/A time=00:00:01.56 bitrate=N/A speed=1.03x frame= 62 fps= 30 q=22.0 size=N/A time=00:00:02.06 bitrate=N/A speed=1.02x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619942.ts' for writing frame= 77 fps= 30 q=24.0 size=N/A time=00:00:02.56 bitrate=N/A speed=1.01x frame= 92 fps= 30 q=22.0 size=N/A time=00:00:03.06 bitrate=N/A speed=0.999x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619943.ts' for writing frame= 108 fps= 30 q=29.0 size=N/A time=00:00:03.60 bitrate=N/A speed= 1x frame= 124 fps= 30 q=21.0 size=N/A time=00:00:04.13 bitrate=N/A speed=1.01x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619944.ts' for writing frame= 139 fps= 30 q=20.0 size=N/A time=00:00:04.63 bitrate=N/A speed=1.01x frame= 154 fps= 30 q=18.0 size=N/A time=00:00:05.13 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619945.ts' for writing frame= 169 fps= 30 q=19.0 size=N/A time=00:00:05.63 bitrate=N/A speed= 1x frame= 185 fps= 30 q=19.0 size=N/A time=00:00:06.16 bitrate=N/A speed=1.01x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619946.ts' for writing frame= 199 fps= 30 q=20.0 size=N/A time=00:00:06.63 bitrate=N/A speed= 1x frame= 215 fps= 30 q=19.0 size=N/A time=00:00:07.16 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619947.ts' for writing frame= 230 fps= 30 q=19.0 size=N/A time=00:00:07.66 bitrate=N/A speed= 1x frame= 242 fps= 30 q=18.0 size=N/A time=00:00:08.06 bitrate=N/A speed=0.99x frame= 254 fps= 29 q=17.0 size=N/A time=00:00:08.46 bitrate=N/A speed=0.979x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619948.ts' for writing frame= 276 fps= 30 q=17.0 size=N/A time=00:00:09.20 bitrate=N/A speed=1.01x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec133903625619949.ts' for writing frame= 290 fps= 30 q=21.0 size=N/A time=00:00:09.66 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199410.ts' for writing frame= 306 fps= 30 q=31.0 size=N/A time=00:00:10.20 bitrate=N/A speed= 1x frame= 322 fps= 30 q=21.0 size=N/A time=00:00:10.73 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199411.ts' for writing frame= 337 fps= 30 q=21.0 size=N/A time=00:00:11.23 bitrate=N/A speed= 1x frame= 352 fps= 30 q=19.0 size=N/A time=00:00:11.73 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199412.ts' for writing frame= 367 fps= 30 q=19.0 size=N/A time=00:00:12.23 bitrate=N/A speed= 1x frame= 382 fps= 30 q=18.0 size=N/A time=00:00:12.73 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199413.ts' for writing frame= 397 fps= 30 q=18.0 size=N/A time=00:00:13.23 bitrate=N/A speed= 1x frame= 412 fps= 30 q=18.0 size=N/A time=00:00:13.73 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199414.ts' for writing frame= 428 fps= 30 q=18.0 size=N/A time=00:00:14.26 bitrate=N/A speed= 1x frame= 443 fps= 30 q=17.0 size=N/A time=00:00:14.76 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199415.ts' for writing frame= 458 fps= 30 q=18.0 size=N/A time=00:00:15.26 bitrate=N/A speed= 1x frame= 474 fps= 30 q=17.0 size=N/A time=00:00:15.80 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199416.ts' for writing frame= 489 fps= 30 q=18.0 size=N/A time=00:00:16.30 bitrate=N/A speed= 1x frame= 504 fps= 30 q=17.0 size=N/A time=00:00:16.80 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199417.ts' for writing frame= 520 fps= 30 q=20.0 size=N/A time=00:00:17.33 bitrate=N/A speed= 1x frame= 535 fps= 30 q=18.0 size=N/A time=00:00:17.83 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199418.ts' for writing frame= 551 fps= 30 q=20.0 size=N/A time=00:00:18.36 bitrate=N/A speed= 1x frame= 566 fps= 30 q=19.0 size=N/A time=00:00:18.86 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199419.ts' for writing frame= 581 fps= 30 q=20.0 size=N/A time=00:00:19.36 bitrate=N/A speed= 1x frame= 596 fps= 30 q=19.0 size=N/A time=00:00:19.86 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199420.ts' for writing frame= 612 fps= 30 q=21.0 size=N/A time=00:00:20.40 bitrate=N/A speed= 1x frame= 626 fps= 30 q=20.0 size=N/A time=00:00:20.86 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199421.ts' for writing frame= 641 fps= 30 q=21.0 size=N/A time=00:00:21.37 bitrate=N/A speed= 1x frame= 657 fps= 30 q=35.0 size=N/A time=00:00:21.90 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199422.ts' for writing frame= 672 fps= 30 q=33.0 size=N/A time=00:00:22.40 bitrate=N/A speed= 1x frame= 687 fps= 30 q=23.0 size=N/A time=00:00:22.90 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199423.ts' for writing frame= 703 fps= 30 q=23.0 size=N/A time=00:00:23.43 bitrate=N/A speed= 1x frame= 718 fps= 30 q=25.0 size=N/A time=00:00:23.93 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199424.ts' for writing frame= 733 fps= 30 q=27.0 size=N/A time=00:00:24.44 bitrate=N/A speed= 1x frame= 749 fps= 30 q=26.0 size=N/A time=00:00:24.96 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199425.ts' for writing frame= 764 fps= 30 q=28.0 size=N/A time=00:00:25.46 bitrate=N/A speed= 1x frame= 780 fps= 30 q=27.0 size=N/A time=00:00:26.00 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199426.ts' for writing frame= 795 fps= 30 q=27.0 size=N/A time=00:00:26.50 bitrate=N/A speed= 1x frame= 810 fps= 30 q=26.0 size=N/A time=00:00:27.00 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec1339036256199427.ts' for writing frame= 825 fps= 30 q=29.0 size=N/A time=00:00:27.50 bitrate=N/A speed= 1x [hls @ 0x55e88a4f3040] Opening '/recordings/13391978436095-2/rec13390362561994.m3u8.tmp' for writing frame= 840 fps= 30 q=30.0 Lsize=N/A time=00:00:28.01 bitrate=N/A speed= 1x video:4635kB audio:404kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown [libx264 @ 0x55e88a4f70c0] frame I:42 Avg QP:12.88 size: 28020 [libx264 @ 0x55e88a4f70c0] frame P:798 Avg QP:13.11 size: 4473 [libx264 @ 0x55e88a4f70c0] mb I I16..4: 88.4% 0.0% 11.6% [libx264 @ 0x55e88a4f70c0] mb P I16..4: 6.6% 0.0% 0.4% P16..4: 6.6% 1.9% 0.6% 0.0% 0.0% skip:83.8% [libx264 @ 0x55e88a4f70c0] coded y,uvDC,uvAC intra: 18.8% 20.1% 10.1% inter: 1.7% 2.4% 0.1% [libx264 @ 0x55e88a4f70c0] i16 v,h,dc,p: 55% 30% 12% 4% [libx264 @ 0x55e88a4f70c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 27% 31% 2% 3% 2% 2% 1% 2% [libx264 @ 0x55e88a4f70c0] i8c dc,h,v,p: 77% 9% 12% 1% [libx264 @ 0x55e88a4f70c0] Weighted P-Frames: Y:1.1% UV:0.1% [libx264 @ 0x55e88a4f70c0] kb/s:1355.98 [aac @ 0x55e88a4f8440] Qavg: 40876.258 jq: error (at <stdin>:1): Cannot iterate over null (null) jq: error (at <stdin>:1): Cannot iterate over null (null) jq: error (at <stdin>:1): null (null) cannot be parsed as a number jq: error (at <stdin>:1): null (null) cannot be parsed as a number jq: error: syntax error, unexpected '|' (Unix shell quoting issues?) at <top-level>, line 1: .hasAudio=false | .hasVideo=false | .duration= | .size= | .status="failed" jq: 1 compile error ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 Invalid duration specification for ss: -i*****编辑5 **********
***** Edit 5 **********
请问我选择哪种格式，它会在20到30秒后停止.当不是.mp4 ffmpeg时，与.webm .mov .264处于同一行
no mather what format I choose, it stops after 20 to 30 secs. the same line with .webm .mov .264 when it's not .mp4 ffmpeg seems to drop
推荐答案有了这些更改，我就能实现3到4个稳定的延迟；)
With those changes, I'm able to acheive 3 to 4 stable delay ;)
第79行，
github/OpenVidu/openvidu/blob/master/openvidu-server/docker/openvidu-recording/scripts/composed.sh
我已更换
-c:a aac -c:v libx264 -preset ultrafast -crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p有
-c:a aac -c:v libx264 -movflags +dash -preset ultrafast -crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p -tune zerolatency -c:a aac -ac 2 -profile:v main -flags -global_header -bufsize 969k -hls_time 1 -hls_list_size 0 -g 30 -start_number 0 -streaming 1 -hls_playlist 1 -lhls 1 -hls_playlist_type event -f hls注释
-movflags + dash =>以某种方式帮助了我(我没有完整地说明问题，但我注意到有一个微小的区别帮助了...)
-movflags +dash => helped somehow (I don't have a full explication, but I noticed a mini difference that helped...)
-调整零延迟 =>ffmpeg x264预设用于流式传输
-tune zerolatency => ffmpeg x264 preset made for streaming
-profile:v main =>个人主页主要也专门用于流式传输
-profile:v main => profile main is specialized for streaming too
-lhls 1 =>启用低延迟HLS
-lhls 1 => enables Low Latency HLS
*****我还必须等待MP4出现才能在M3U8中创建符号，以便可以在野生动物园中播放
***** ALSO I HAD TO WAIT FOR THE MP4 TO APPEAR TO CREATE A SYMLINC IN M3U8 to be playable in safari
while [ ! -f __path_to.mp4 ] ; do sleep 1 ; done ; ln -s __path_to.mp4 __path_to.m3u8;**********在这种特殊情况下的重要说明:ffmpeg最终扩展名必须保持.mp4，因为如果我将其更改为.m3u8 ===>我真的不知道为什么，但是几秒钟后它停止了(也许是因为x11grab ???)
********** IMPORTANT NOTES in this special case : the ffmpeg final extension HAVE to remain .mp4 because if I change it to .m3u8 ===>> I really don't know why, but it stops after few seconds (maybe because of x11grab ???)
•••••有关玩家代码的信息，请参见以下内容:
••••• FOR THE CODE OF THE PLAYER SEE THIS : hls.js starting a beginning with ANDROID mobile (chrome, webview also) and not live *** but works very nice in deskto, ios .. hls.js 1.0.0 2021-04-01
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ffmpeg x11grab转换为流格式
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