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Autres articles (96)
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Sélection de projets utilisant MediaSPIP
29 avril 2011, parLes exemples cités ci-dessous sont des éléments représentatifs d’usages spécifiques de MediaSPIP pour certains projets.
Vous pensez avoir un site "remarquable" réalisé avec MediaSPIP ? Faites le nous savoir ici.
Ferme MediaSPIP @ Infini
L’Association Infini développe des activités d’accueil, de point d’accès internet, de formation, de conduite de projets innovants dans le domaine des Technologies de l’Information et de la Communication, et l’hébergement de sites. Elle joue en la matière un rôle unique (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
Sur d’autres sites (5276)
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ffmpeg - merge mp3 and mp4 (duration difference)
8 décembre 2017, par dfionovI’m trying to merge mp4 and mp3 files with ffmpeg.
mp4 duration - 9.800 sec, mp3 - 58.540 sec. So i using -shortest key.
Code :ffmpeg -i video.mp4 -i audio.mp3 -c:v libx264 -c:a aac -strict experimental -shortest output.mp4After that i got output.mp4 with duration 9.846. Where is my error ? Why output video longer than source ? (9.846 sec and 9.800 sec).
Source mp4 MediaInfo :
General
Complete name : F:\video test\video.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : iso5 (iso5/dash)
File size : 3.19 MiB
Duration : 9 s 800 ms
Overall bit rate : 2 732 kb/s
Encoded date : UTC 2017-11-24 20:53:53
Tagged date : UTC 2017-11-24 20:53:53
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 9 s 800 ms
Bit rate : 2 729 kb/s
Maximum bit rate : 3 766 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.118
Stream size : 3.19 MiB (100%)
Writing library : x264 core 146
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Tagged date : UTC 2017-11-24 20:53:53Source mp3 Mediainfo :
General
Complete name : F:\video test\audio.mp3
Format : MPEG Audio
File size : 1.19 MiB
Duration : 58 s 540 ms
Overall bit rate mode : Variable
Overall bit rate : 170 kb/s
Writing library : LAME3.99r
Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Format settings : Joint stereo / MS Stereo
Duration : 58 s 540 ms
Bit rate mode : Variable
Bit rate : 170 kb/s
Minimum bit rate : 32.0 kb/s
Channel(s) : 2 channels
Sampling rate : 44.1 kHz
Frame rate : 38.281 FPS (1152 SPF)
Compression mode : Lossy
Stream size : 1.19 MiB (100%)
Writing library : LAME3.99r
Encoding settings : -m j -V 2 -q 0 -lowpass 18.5 --vbr-new -b 32Console output :
ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.2.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : iso5
minor_version : 1
compatible_brands: iso5dash
creation_time : 2017-11-24T20:53:53.000000Z
Duration: 00:00:09.80, start: 0.000000, bitrate: 2732 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2259 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Input #1, mp3, from 'audio.mp3':
Duration: 00:00:58.54, start: 0.025057, bitrate: 170 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 170 kb/s
Metadata:
encoder : LAME3.99r
Side data:
replaygain: track gain - -2.200000, track peak - unknown, album gain - unknown, album peak - unknown,
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #1:0 -> #0:1 (mp3 (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 00000000005ab440] using SAR=1/1
[libx264 @ 00000000005ab440] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 00000000005ab440] profile High, level 3.1
[libx264 @ 00000000005ab440] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
Metadata:
major_brand : iso5
minor_version : 1
compatible_brands: iso5dash
encoder : Lavf57.83.100
Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.107.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.107.100 aac
Side data:
replaygain: track gain - -2.200000, track peak - unknown, album gain - unknown, album peak - unknown,
frame= 54 fps=0.0 q=28.0 size= 0kB time=00:00:00.04 bitrate= 8.3kbits/s speed=0.0927x
frame= 80 fps= 80 q=28.0 size= 0kB time=00:00:01.09 bitrate= 0.4kbits/s speed=1.09x
frame= 98 fps= 65 q=28.0 size= 256kB time=00:00:01.83 bitrate=1143.5kbits/s speed=1.21x
frame= 119 fps= 59 q=28.0 size= 512kB time=00:00:02.67 bitrate=1570.9kbits/s speed=1.32x
frame= 144 fps= 56 q=28.0 size= 768kB time=00:00:03.66 bitrate=1715.0kbits/s speed=1.42x
frame= 167 fps= 52 q=28.0 size= 1024kB time=00:00:04.57 bitrate=1833.9kbits/s speed=1.44x
frame= 190 fps= 51 q=28.0 size= 1280kB time=00:00:05.50 bitrate=1905.5kbits/s speed=1.47x
frame= 218 fps= 51 q=28.0 size= 1792kB time=00:00:06.64 bitrate=2210.6kbits/s speed=1.56x
frame= 242 fps= 50 q=28.0 size= 2048kB time=00:00:07.56 bitrate=2216.4kbits/s speed=1.58x
frame= 245 fps= 41 q=-1.0 Lsize= 3045kB time=00:00:09.82 bitrate=2539.6kbits/s speed=1.65x
video:2880kB audio:156kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.298058%
[libx264 @ 00000000005ab440] frame I:14 Avg QP:20.01 size: 39750
[libx264 @ 00000000005ab440] frame P:106 Avg QP:23.85 size: 14578
[libx264 @ 00000000005ab440] frame B:125 Avg QP:24.63 size: 6770
[libx264 @ 00000000005ab440] consecutive B-frames: 22.9% 22.0% 15.9% 39.2%
[libx264 @ 00000000005ab440] mb I I16..4: 16.7% 80.3% 3.0%
[libx264 @ 00000000005ab440] mb P I16..4: 10.2% 36.2% 1.1% P16..4: 25.0% 7.9% 2.5% 0.0% 0.0% skip:17.1%
[libx264 @ 00000000005ab440] mb B I16..4: 2.3% 5.8% 0.2% B16..8: 31.4% 6.5% 0.9% direct: 3.7% skip:49.2% L0:51.8% L1:44.5% BI: 3.7%
[libx264 @ 00000000005ab440] 8x8 transform intra:76.1% inter:86.3%
[libx264 @ 00000000005ab440] coded y,uvDC,uvAC intra: 38.3% 52.1% 9.0% inter: 12.3% 20.1% 0.2%
[libx264 @ 00000000005ab440] i16 v,h,dc,p: 30% 28% 9% 33%
[libx264 @ 00000000005ab440] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 23% 19% 3% 3% 4% 4% 4% 4%
[libx264 @ 00000000005ab440] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 21% 14% 5% 7% 7% 6% 5% 3%
[libx264 @ 00000000005ab440] i8c dc,h,v,p: 45% 24% 25% 6%
[libx264 @ 00000000005ab440] Weighted P-Frames: Y:13.2% UV:6.6%
[libx264 @ 00000000005ab440] ref P L0: 71.7% 12.5% 12.9% 2.7% 0.2%
[libx264 @ 00000000005ab440] ref B L0: 92.8% 6.3% 0.9%
[libx264 @ 00000000005ab440] ref B L1: 98.3% 1.7%
[libx264 @ 00000000005ab440] kb/s:2406.56
[aac @ 00000000005adde0] Qavg: 511.420ffprobe -show_packets output too big, so I loaded to pastebin
https://pastebin.com/TYSMdceS -
Fixing A/V sync issues with RTP/RTCP sent from mediasoup
10 décembre 2017, par artushinA little background : I’m attempting to record a webrtc call being made through the mediasoup v2 SFU. I’m using mediasoup’s
room.createRtpStreamer()method to generate a stream which mirrors RTP/RTCP to ffmpeg. Two streamers are created for audio and video within 30ms of each other and begin broadcasting. FFmpeg then spins up and starts accepting. Pretty sure RTCP is working since ffmpeg is always starting with a keyframe despite being started after the streamer begins broadcasting.The problem is that I encounter audio/video desynchronization with seemingly random offsets. My current theory is that this offset is based on how old the last keyframe is that RTCP requests to start the stream. See below for ffmpeg configuration and output but my question is : what ffmpeg arguments can I use to adjust the video frame timestamps to match the audio frame timestamps or vice versa ? I’ve messed around with
-map 0:0,0:1 -map 0:1,0:1but it doesn’t seem to do what I’m looking for.ffmpeg flags :
'-y',
'-loglevel',
'debug',
'-dump',
'-protocol_whitelist',
'file,crypto,udp,rtp,data',
'-analyzeduration',
'20M',
'-probesize',
'20M',
'-i',
`data:text/plain;base64,${sdp.toString('base64')}`,
'-fflags',
'+genpts',
'-vcodec',
'copy',
'-acodec',
'aac',
'-bsf:v',
'h264_mp4toannexb',
'-start_number',
'0',
'-hls_list_size',
'2147480000',
'-hls_wrap',
'0',
'-hls_time',
'10',SDP used for input (template) :
v=0
o=- 0 0 IN IP4 <%=ip %>
s=title
c=IN IP4 <%=ip %>
m=audio <%=audioPort %> RTP/AVPF <%=audioPayload %>
a=sendrecv
a=rtcp-mux
a=rtpmap:<%=audioPayload %> opus/48000/2
a=fmtp:<%=audioPayload %> minptime=10; useinbandfec=1
m=video <%=videoPort %> RTP/AVPF <%=videoPayload %>
a=sendrecv
a=rtcp-mux
a=rtpmap:<%=videoPayload %> H264/90000
a=rtcp-fb:<%=videoPayload %> ccm fir
a=rtcp-fb:<%=videoPayload %> nack
a=rtcp-fb:<%=videoPayload %> nack pli
a=rtcp-fb:<%=videoPayload %> goog-remb
a=rtcp-fb:<%=videoPayload %> transport-cc
a=fmtp:<%=videoPayload %> level-asymmetry-allowed=1;packetization-mode=1ffmpeg output - garbled with some timestamps
1512775954585 - stderr: ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 9.0.0 (clang-900.0.38)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libmp3lame --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
1512775954587 - stderr: libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
1512775954587 - stderr: libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Splitting the commandline.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-dump' ... matched as option 'dump' (dump each input packet) with argument '1'.
Reading option '-protocol_whitelist' ...1512775954589 - stderr: matched as AVOption 'protocol_whitelist' with argument 'file,crypto,udp,rtp,data'.
Reading option '-analyzeduration' ...1512775954590 - stderr: matched as AVOption 'analyzeduration' with argument '20M'.
Reading option '-probesize' ...1512775954590 - stderr: matched as AVOption 'probesize' with argument '20M'.
Reading option '-i' ... matched as input url with argument 'data:text/plain;base64,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'.
Reading option '-fflags' ...1512775954591 - stderr: matched as AVOption 'fflags' with argument '+genpts'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'copy'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'aac'.
Reading option '-vsync' ... matched as option 'vsync' (video sync method) with argument '0'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:0,0:1'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:1,0:1'.
Reading option '-bsf:v' ... matched as option 'bsf' (A comma-separated list of bitstream filters) with argument 'h264_mp4toannexb'.
Reading option '-start_number' ...1512775954591 - stderr: matched as AVOption 'start_number' with argument '0'.
Reading option '-hls_list_size' ...1512775954591 - stderr: matched as AVOption 'hls_list_size' with argument '2147480000'.
Reading option '-hls_wrap' ... matched as AVOption 'hls_wrap' with argument '0'.
Reading option '-hls_time' ...1512775954591 - stderr: matched as AVOption 'hls_time' with argument '10'.
Reading option '/tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
1512775954592 - stderr: Applying option loglevel (set logging level) with argument debug.
Applying option dump (dump each input packet) with argument 1.
Applying option vsync (video sync method) with argument 0.
Successfully parsed a group of options.
Parsing a group of options: input url data:text/plain;base64,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.
Successfully parsed a group of options.
Opening an input file: data:text/plain;base64,dj0wCm89LSAwIDAgSU4gSVA0IDEyNy4wLjAuMQpzPWUwYzkyZmEwLWRhZDUtMTFlNy04Njg3LTA5MGRkYTk1YjFhNCBmb29ib2FyCmM9SU4gSVA0IDEyNy4wLjAuMQptPWF1ZGlvIDIwMDAwIFJUUC9BVlBGIDEwMAphPXNlbmRyZWN2CmE9cnRjcC1tdXgKYT1ydHBtYXA6MTAwIG9wdXMvNDgwMDAvMgphPWZtdHA6MTAwIG1pbnB0aW1lPTEwOyB1c2VpbmJhbmRmZWM9MQptPXZpZGVvIDIwMDAyIFJUUC9BVlBGIDEwMQphPXNlbmRyZWN2CmE9cnRjcC1tdXgKYT1ydHBtYXA6MTAxIEgyNjQvOTAwMDAKYT1ydGNwLWZiOjEwMSBjY20gZmlyCmE9cnRjcC1mYjoxMDEgbmFjawphPXJ0Y3AtZmI6MTAxIG5hY2sgcGxpCmE9cnRjcC1mYjoxMDEgZ29vZy1yZW1iCmE9cnRjcC1mYjoxMDEgdHJhbnNwb3J0LWNjCmE9Zm10cDoxMDEgbGV2ZWwtYXN5bW1ldHJ5LWFsbG93ZWQ9MTtwYWNrZXRpemF0aW9uLW1vZGU9MTtwcm9maWxlLWxldmVsLWlkPTQyZTAxZgo=.
1512775954592 - stderr: [NULL @ 0x7f81fd000000] Opening 'data:text/plain;base64,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' for reading
1512775954593 - stderr: [data @ 0x7f81fca001a0] Content-type: text/plain
{"level":"info","time":"Dec 8, 2017 11:32 PM","message":"ffmpeg started"}
1512775954595 - stderr: [sdp @ 0x7f81fd000000] Format sdp probed with size=2048 and score=50
1512775954598 - stderr: [sdp @ 0x7f81fd000000] audio codec set to: opus
[sdp @ 0x7f81fd000000] audio samplerate set to: 48000
[sdp @ 0x7f81fd000000] audio channels set to: 2
1512775954639 - stderr: [sdp @ 0x7f81fd000000] video codec set to: h264
[sdp @ 0x7f81fd000000] RTP Packetization Mode: 1
[sdp @ 0x7f81fd000000] RTP Profile IDC: 42 Profile IOP: e0 Level: 1f
[udp @ 0x7f81fcb007e0] end receive buffer size reported is 65536
[udp @ 0x7f81fbe00180] end receive buffer size reported is 65536
[sdp @ 0x7f81fd000000] setting jitter buffer size to 500
[udp @ 0x7f81fbe00680] end receive buffer size reported is 65536
[udp @ 0x7f81fbe00740] end receive buffer size reported is 65536
[sdp @ 0x7f81fd000000] setting jitter buffer size to 500
[sdp @ 0x7f81fd000000] Before avformat_find_stream_info() pos: 479 bytes read:479 seeks:0 nb_streams:2
{"level":"info","time":"Dec 8, 2017 11:32 PM","message":"new active speaker","activePeer":"9f05d96a-9641-4c63-8f0e-486b98e48eb5"}
1512775954773 - stderr: [AVBSFContext @ 0x7f81fc8018e0] nal_unit_type: 7, nal_ref_idc: 3
[AVBSFContext @ 0x7f81fc8018e0] nal_unit_type: 8, nal_ref_idc: 3
[AVBSFContext @ 0x7f81fc8018e0] nal_unit_type: 5, nal_ref_idc: 3
1512775954774 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 7, nal_ref_idc: 3
1512775954774 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 8, nal_ref_idc: 3
1512775954774 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 5, nal_ref_idc: 3
1512775954774 - stderr: [h264 @ 0x7f8200000c00] Reinit context to 640x480, pix_fmt: yuv420p
1512775954801 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 1, nal_ref_idc: 3
1512775954939 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 7, nal_ref_idc: 3
1512775954939 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 8, nal_ref_idc: 3
1512775954940 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 5, nal_ref_idc: 3
1512775955003 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 1, nal_ref_idc: 3
1512775955999 - stderr: Last message repeated 3 times
[sdp @ 0x7f81fd000000] All info found
1512775955999 - stderr: [sdp @ 0x7f81fd000000] rfps: 29.750000 0.019566
[sdp @ 0x7f81fd000000] rfps: 29.833333 0.015263
[sdp @ 0x7f81fd000000] rfps: 29.916667 0.011503
1512775955999 - stderr: [sdp @ 0x7f81fd000000] rfps: 30.000000 0.008285
[sdp @ 0x7f81fd000000] rfps: 31.000000 0.011990
Last message repeated 1 times
[sdp @ 0x7f81fd000000] rfps: 29.970030 0.009380
[sdp @ 0x7f81fd000000] After avformat_find_stream_info() pos: 479 bytes read:479 seeks:0 frames:98
1512775956000 - stderr: Input #0, sdp, from 'data:text/plain;base64,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':
1512775956000 - stderr: Metadata:
title : e0c92fa0-dad5-11e7-8687-090dda95b1a4 fooboar
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0, 70, 1/48000: Audio: opus, 48000 Hz, stereo, fltp1512775956000 - stderr:
Stream #0:1, 28, 1/90000: Video: h264 (Constrained Baseline), 1 reference frame, yuv420p(progressive, left), 640x480, 0/1, 30 tbr, 90k tbn, 180k tbc
1512775956000 - stderr: Successfully opened the file.
Parsing a group of options: output url /tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument aac.
Applying option map (set input stream mapping) with argument 0:0,0:1.
Applying option map (set input stream mapping) with argument 0:1,0:1.
Applying option bsf:v (A comma-separated list of bitstream filters) with argument h264_mp4toannexb.
Successfully parsed a group of options.
1512775956000 - stderr: Opening an output file: /tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8.
1512775956000 - stderr: Successfully opened the file.
1512775956001 - stderr: [AVBSFContext @ 0x7f81fcb020a0] The input looks like it is Annex B already
Stream mapping:
1512775956001 - stderr: Stream #0:0 -> #0:0 [sync #0:1] (opus (native) -> aac (native))
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #0:
keyframe=1
duration=0.000
dts=0.000 pts=0.000
size=82
1512775956001 - stderr: [SWR @ 0x7f820001e600] Using fltp internally between filters
1512775956002 - stderr: detected 8 logical cores
1512775956003 - stderr: [graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'time_base' to value '1/48000'
[graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'sample_rate' to value '48000'
1512775956003 - stderr: [graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'sample_fmt' to value 'fltp'
[graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'channel_layout' to value '0x3'
[graph_0_in_0_0 @ 0x7f81fc90dfc0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[format_out_0_0 @ 0x7f81fc914da0] Setting 'sample_fmts' to value 'fltp'
[format_out_0_0 @ 0x7f81fc914da0] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
1512775956004 - stderr: [AVFilterGraph @ 0x7f81fbd02200] query_formats: 4 queried, 9 merged, 0 already done, 0 delayed
1512775956007 - stderr: [hls @ 0x7f81fd80f000] Opening '/tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/15127759544650.ts' for writing
[file @ 0x7f81fbf01ee0] Setting default whitelist 'file,crypto'
1512775956007 - stderr: [mpegts @ 0x7f81fd877800] muxrate VBR, pcr every 9000 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts
Output #0, hls, to '/tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8':
Metadata:
title : e0c92fa0-dad5-11e7-8687-090dda95b1a4 fooboar
encoder : Lavf57.83.100
1512775956007 - stderr: Stream #0:0, 0, 1/90000: Audio: aac (LC), 48000 Hz, stereo, fltp, delay 1024, 128 kb/s
Metadata:
encoder : Lavc57.107.100 aac
Stream #0:1, 0, 1/90000: Video: h264 (Constrained Baseline), 1 reference frame, yuv420p(progressive, left), 640x480 (0x0), 0/1, q=2-31, 30 tbr, 90k tbn, 90k tbc
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
1512775956007 - stderr: Last message repeated 1 times
stream #0:
keyframe=1
duration=0.000
dts=0.020 pts=0.020
size=79
1512775956007 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
Last message repeated 1 times
stream #0:
keyframe=1
duration=0.000
1512775956007 - stderr: dts=0.040 pts=0.040
size=75
1512775956014 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #0:
keyframe=1
duration=0.000
dts=0.0601512775956014 - stderr: pts=0.060
size=81
1512775956017 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #0:
keyframe=1
duration=0.000
dts=0.080 pts=0.080
size=76
1512775956022 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #0:
keyframe=1
duration=0.000
dts=0.1001512775956022 - stderr: pts=0.100
size=79
1512775956023 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #0:
keyframe=1
1512775956023 - stderr: duration=0.000
dts=0.120 pts=0.120
size=95
1512775956024 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
1512775956024 - stderr: stream #0:
keyframe=1
duration=0.000
dts=0.140 pts=0.140
size=93
1512775956025 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #0:
keyframe=1
1512775956025 - stderr: duration=0.000
dts=0.160 pts=0.160
size=94
1512775956026 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
stream #1:
keyframe=1
1512775956026 - stderr: duration=0.000
dts=N/A pts=N/A
size=992
[hls @ 0x7f81fd80f000] Timestamps are unset in a packet for stream 1. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
1512775956026 - stderr: stream #0:
keyframe=1
duration=0.000
1512775956026 - stderr: dts=0.180 pts=0.180
size=108
1512775956027 - stderr: stream #1:
keyframe=0
duration=0.000
1512775956027 - stderr: dts=0.002 pts=0.002
size=3047
[hls @ 0x7f81fd80f000] pkt->duration = 0, maybe the hls segment duration will not precise
stream #0:
keyframe=1
duration=0.000
dts=0.200 pts=0.200
size=89
1512775956060 - stderr: stream #0:
keyframe=1
duration=0.000
dts=0.220 pts=0.220
size=73
stream #0:
keyframe=1
duration=0.000
dts=0.240 pts=0.240
size=78
stream #0:
keyframe=1
duration=0.000
dts=0.260 pts=0.260Notice how the first frame for stream #1 (video) starts after a number of audio frames ? Specifically, it starts at stream #0 dts/pts 0.18. In this situation, the a/v sync issue is pretty much unnoticeable, but with a bunch of repros, I’ve determined that the a/v sync offset is always the duration of however long audio frames were sent before the first video frame (sometimes seconds). I’m consistently starting the RTP streams only tens of ms apart, so I can’t control for this variance on the input side.
After the initial audio frames come in, the first video frame has a dts/pts around 0. What ffmpeg setting would I use to adjust the timestamps accordingly ? I don’t care about losing the starting audio that doesn’t have video, so any solution that would adjust the timestamps works.
-
FFMPEG ALSA xrun crash
13 décembre 2017, par Liam MartensI’m running a YouTube RTMP stream using FFMPEG with x11grab and an alsa loopback device but sometimes after let’s say 20 hours there is an ALSA xrun and then the ffmpeg command crashes, but I’m not sure why or how this happens. (mind you the ffmpeg command does not run continuously it gets restarted automatically every so often, but the xrun makes the command crash causing the stream to go offline sometimes because a crash restart is not fast enough)
I’m using
thread_queue_sizeand I’ve even manually compiled ffmpeg with a higherALSA BUFFER SIZE, but the issue appears to persist still. Besides this I’ve also scoured many posts with people having similar issues but these never really seem to end up resolved.This is the stream command
ffmpeg -loglevel verbose -f alsa -thread_queue_size 12288 -ac 2 -i hw:Loopback,1,0 \
-probesize 10M -f x11grab -field_order tt -thread_queue_size 12288 -video_size 1280x720 -r 30 -i :1.1 \
-c:v libx264 -c:a libmp3lame -shortest -tune fastdecode -tune zerolatency \
-crf 26 -pix_fmt yuv420p -threads 0 -maxrate 2500k -bufsize 2500k -pass 1 -af aresample=async=1 \
-movflags +faststart -flags +global_header -preset ultrafast -r 30 -g 60 -b:v 2000k -b:a 192k -ar 44100 \
-f flv -rtmp_live live rtmp://a.rtmp.youtube.com/live2/{KEY}Log excerpt
ffmpeg version N-89463-gc7a5e80 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18) 20170516
configuration: --prefix=/usr --enable-avresample --enable-avfilter --enable-gpl --enable-libmp3lame --enable-librtmp --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libtheora --enable-postproc --enable-pic --enable-pthreads --enable-shared --disable-stripping --disable-static --enable-vaapi --enable-libopus --enable-libfreetype --enable-libfontconfig --enable-libpulse --disable-debug
libavutil 56. 5.100 / 56. 5.100
libavcodec 58. 6.103 / 58. 6.103
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 7.100 / 7. 7.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, alsa, from 'hw:Loopback,1,0':
Duration: N/A, start: 1513163617.594224, bitrate: 1536 kb/s
Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Input #1, x11grab, from ':1.1':
Duration: N/A, start: 1513163617.632434, bitrate: N/A
Stream #1:0: Video: rawvideo, 1 reference frame (BGR[0] / 0x524742), bgr0(top first), 854x480, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
Parsing...
Parsed protocol: 0
Parsed host : a.rtmp.youtube.com
Parsed app : live2
RTMP_Connect1, ... connected, handshaking
HandShake: Type Answer : 03
HandShake: Server Uptime : 0
HandShake: FMS Version : 4.0.0.1
HandShake: Handshaking finished....
RTMP_Connect1, handshaked
Invoking connect
HandleServerBW: server BW = 2500000
HandleClientBW: client BW = 10000000 2
HandleChangeChunkSize, received: chunk size change to 256
RTMP_ClientPacket, received: invoke 240 bytes
(object begin)
Property:
Property:
Property:
(object begin)
Property: 3,5,3,824>
Property:
Property:
(object end)
Property:
(object begin)
Property:
Property:
Property:
Property:
Property:
(object begin)
Property:
(object end)
(object end)
(object end)
HandleInvoke, server invoking <_result>
HandleInvoke, received result for method call <connect>
Invoking releaseStream
Invoking FCPublish
Invoking createStream
RTMP_ClientPacket, received: invoke 21 bytes
(object begin)
Property:
Property:
Property: NULL
(object end)
HandleInvoke, server invoking <onbwdone>
Invoking _checkbw
RTMP_ClientPacket, received: invoke 29 bytes
(object begin)
Property:
Property:
Property: NULL
Property:
(object end)
HandleInvoke, server invoking <_result>
HandleInvoke, received result for method call <createstream>
Invoking publish
RTMP_ClientPacket, received: invoke 73 bytes
(object begin)
Property:
Property:
Property: NULL
Property:
(object begin)
Property:
Property:
(object end)
(object end)
HandleInvoke, server invoking <onstatus>
HandleInvoke, onStatus: NetStream.Publish.Start
Stream mapping:
Stream #1:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (pcm_s16le (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[graph 0 input from stream 1:0 @ 0x5607d087e060] w:854 h:480 pixfmt:bgr0 tb:1/30 fr:30/1 sar:0/1 sws_param:flags=2
[auto_scaler_0 @ 0x5607d087d800] w:iw h:ih flags:'bicubic' interl:0
[format @ 0x5607d087ed40] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'format'
[auto_scaler_0 @ 0x5607d087d800] w:854 h:480 fmt:bgr0 sar:0/1 -> w:854 h:480 fmt:yuv420p sar:0/1 flags:0x4
[swscaler @ 0x5607d0880260] Warning: data is not aligned! This can lead to a speed loss
[libx264 @ 0x5607d08684e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x5607d08684e0] profile Constrained Baseline, level 3.1
[libx264 @ 0x5607d08684e0] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=2 lookahead_threads=2 sliced_threads=1 slices=2 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=60 keyint_min=6 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=crf mbtree=0 crf=26.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1500 vbv_bufsize=1500 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=0
[graph_1_in_0_0 @ 0x5607d091c840] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[Parsed_aresample_0 @ 0x5607d0916b40] ch:2 chl:stereo fmt:s16 r:48000Hz -> ch:2 chl:stereo fmt:s16p r:44100Hz
Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/{KEY}':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Video: h264 (libx264), 1 reference frame ([7][0][0][0] / 0x0007), yuv420p(top coded first (swapped)), 854x480, q=-1--1, 1000 kb/s, 30 fps, 1k tbn, 30 tbc
Metadata:
encoder : Lavc58.6.103 libx264
Side data:
cpb: bitrate max/min/avg: 1500000/0/1000000 buffer size: 1500000 vbv_delay: -1
Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz, stereo, s16p, delay 1105, 192 kb/s
Metadata:
encoder : Lavc58.6.103 libmp3lame
frame= 29 fps=0.0 q=17.0 size= 146kB time=00:00:00.94 bitrate=1267.3kbits/s speed=1.86x
frame= 44 fps= 44 q=18.0 size= 168kB time=00:00:01.46 bitrate= 942.4kbits/s speed=1.45x
frame= 60 fps= 40 q=16.0 size= 191kB time=00:00:01.96 bitrate= 794.8kbits/s speed= 1.3x
...
frame= 2740 fps= 30 q=17.0 size= 7993kB time=00:01:31.32 bitrate= 717.0kbits/s speed= 1x
frame= 2755 fps= 30 q=18.0 size= 8013kB time=00:01:31.82 bitrate= 714.9kbits/s speed= 1x
[alsa @ 0x5607d084d7e0] ALSA buffer xrun.
</onstatus></createstream></onbwdone></connect>
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