ffmpeg x11grab 到可流式传输格式 [英] ffmpeg x11grab to streamable format
问题描述
2 FFMPEG 过程
2 FFMPEG process
(1) 生成 ffmpeg x11grab 到 .mp4(2) 获取 .mp4 并将其同时重新流式传输到多个 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) 中生成的文件有这个错误moov atom not found"
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
在(2)=>当我尝试在某处 ffmpeg -i file.mp4 输出时:我得到moov atom not found"所以 (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).
我错过了什么
在 (1) -movflags +faststart 中似乎没有解决问题
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 : webrtc 与 kurento 和 coturn.
I'm using openvidu : webrtc with kurento and coturn.
录音功能会随着聊天的进行而动态创建 .mp4.
The record feature creates a .mp4 on the fly as the chat is going on.
要开始录制，我可以对我的服务器进行 API 调用，当所有用户离开聊天室时它会自动停止或执行其他 api 调用以停止.在此链接中查看合成视频 https://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 https://docs.openvidu.io/en/2.17.0/advanced-features/recording/
openvidu 也有网络钩子.
openvidu have also webhooks.
我的问题不是如何停止 ffmpeg，而是在动态"生成 mp4 或其他格式时让 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".
有两个选项:
选项 1:个人 =>每个摄像头 1 个 .webm =>这个 .webm ffmpeg 可以重播为 hls 或 RTMP =>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Composed"视频 =>它使用 ffmpeg 来 x11grab 会话......但它是没有 moov ato 的 mp4，所以 ffmpeg 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.
在这里查看composed.sh脚本https://github.com/OpenVidu/openvidu/blob/master/openvidu-server/docker/openvidu-recording/scripts/composed.sh
see the composed.sh script here https://github.com/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 -preset 超快-crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p-filter:v fps=$FRAMERATE "/recordings/$VIDEO_ID/$VIDEO_NAME.$VIDEO_FORMAT"
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"
我如何修改它以获得更好的结果示例 VP8 或 VP9 以及高质量的 .webm，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 ********
我试过了，它工作了 30 秒，然后突然停止了
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 **********
无论我选择什么格式，它都会在 20 到 30 秒后停止.与 .webm .mov .264 相同的行，当它不是 .mp4 ffmpeg 似乎下降
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
通过这些更改，我能够实现 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
我换了
-c:a aac -c:v libx264 -preset ultrafast -crf 28 -refs 4 -qmin 4 -pix_fmt yuv420p
与
-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 2 -hls_list_size 0 -g 30
-start_number 0 -streaming 1 -hls_playlist 1
-lhls 1 -hls_playlist_type event -f hls
注意事项
-movflags +dash =>以某种方式有所帮助(我没有完整的解释，但我注意到有一点帮助...)
-movflags +dash => helped somehow (I don't have a full explication, but I noticed a mini difference that helped...)
-tune zerolatency =>为流媒体制作的 ffmpeg x264 预设
-tune zerolatency => ffmpeg x264 preset made for streaming
-profile:v main =>profile main 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 中创建一个 SYMLINC 才能在 safari 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 的最终扩展名必须保持为 .mp4，因为如果我将其更改为 .m3u8 ===>>我真的不知道为什么，但它在几秒钟后停止(可能是因为 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 ???)
••••• 播放器代码请参见:hls.js 从 ANDROID 移动(chrome，webview 也是)开始，而不是实时 *** 但在桌面，ios 中工作得很好.. hls.js 1.0.02021-04-01
••••• 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
这篇关于ffmpeg x11grab 到可流式传输格式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
