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Médias (1)
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The pirate bay depuis la Belgique
1er avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
Autres articles (24)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
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Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;
Sur d’autres sites (4361)
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convert mp4 to m4a using ffmpeg in android
30 novembre 2017, par abdulrahmanI’m trying to add the ability to compress video files in my project. However, I tried to extract the Audio from the original video file using FFMPEG Library before compressing it. The command line was
-i video.mp4 -c:a aac -b:a 160k target.m4aAfter the encoding was done I noticed that the output is still a video file but with a difference in the size. This brought two questions to me and I would like to know their answers.
1 - can the ".m4a" file be considered as a video file ?
2 - can I use this command line to compress video files ?
Best regards
Log after executing the command
<p>
success load
started encoding
ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/tempVid.mp4':
Metadata:
major_brand : 3gp4
minor_version : 0
compatible_brands: isom3gp4
creation_time : 2017-11-30 03:22:41
com.android.version: 6.0.1
Duration: 00:00:19.80, start: 0.000000, bitrate: 4246 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 176x144, 4112 kb/s, SAR 1:1 DAR 11:9, 29.94 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 270
creation_time : 2017-11-30 03:22:41
handler_name : VideoHandle
Side data:
displaymatrix: rotation of 90.00 degrees
Stream #0:1(eng): Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, flt, 12 kb/s (default)
Metadata:
creation_time : 2017-11-30 03:22:41
handler_name : SoundHandle
[libx264 @ 0xb5bc4400] using SAR=1/1
[libx264 @ 0xb5bc4400] using cpu capabilities: none!
[libx264 @ 0xb5bc4400] profile High, level 1.1
[libx264 @ 0xb5bc4400] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=5 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
[aac @ 0xb5bc4c00] Too many bits 20480.000000 > 6144 per frame requested, clamping to max
Output #0, ipod, to '/storage/emulated/0/target.m4a':
Metadata:
major_brand : 3gp4
minor_version : 0
compatible_brands: isom3gp4
com.android.version: 6.0.1
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 144x176 [SAR 1:1 DAR 9:11], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
Metadata:
handler_name : VideoHandle
creation_time : 2017-11-30 03:22:41
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 48 kb/s (default)
Metadata:
creation_time : 2017-11-30 03:22:41
handler_name : SoundHandle
encoder : Lavc57.24.102 aac
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (amr_nb (amrnb) -> aac (native))
Press [q] to stop, [?] for help
frame= 47 fps=0.0 q=0.0 size= 0kB time=00:00:00.76 bitrate= 0.5kbits/s speed=1.53x
frame= 69 fps= 68 q=29.0 size= 12kB time=00:00:01.79 bitrate= 56.3kbits/s speed=1.77x
frame= 88 fps= 57 q=29.0 size= 22kB time=00:00:02.30 bitrate= 76.5kbits/s speed=1.49x
frame= 110 fps= 54 q=29.0 size= 31kB time=00:00:02.81 bitrate= 89.9kbits/s speed=1.37x
frame= 118 fps= 45 q=29.0 size= 34kB time=00:00:03.84 bitrate= 71.5kbits/s speed=1.47x
frame= 144 fps= 46 q=29.0 size= 44kB time=00:00:03.84 bitrate= 93.7kbits/s speed=1.23x
frame= 150 fps= 41 q=29.0 size= 48kB time=00:00:04.86 bitrate= 80.6kbits/s speed=1.34x
frame= 178 fps= 42 q=29.0 size= 62kB time=00:00:04.86 bitrate= 105.2kbits/s speed=1.16x
frame= 185 fps= 39 q=29.0 size= 67kB time=00:00:05.88 bitrate= 93.4kbits/s speed=1.25x
frame= 206 fps= 40 q=29.0 size= 78kB time=00:00:05.88 bitrate= 108.5kbits/s speed=1.13x
frame= 214 fps= 37 q=29.0 size= 84kB time=00:00:06.91 bitrate= 99.8kbits/s speed=1.21x
frame= 238 fps= 38 q=29.0 size= 100kB time=00:00:06.91 bitrate= 118.0kbits/s speed=1.11x
frame= 249 fps= 37 q=29.0 size= 106kB time=00:00:07.93 bitrate= 109.3kbits/s speed=1.18x
frame= 268 fps= 37 q=29.0 size= 119kB time=00:00:08.19 bitrate= 119.1kbits/s speed=1.13x
frame= 279 fps= 36 q=29.0 size= 127kB time=00:00:08.96 bitrate= 116.4kbits/s speed=1.16x
frame= 298 fps= 36 q=29.0 size= 140kB time=00:00:09.21 bitrate= 124.4kbits/s speed=1.11x
frame= 308 fps= 35 q=29.0 size= 149kB time=00:00:09.98 bitrate= 122.3kbits/s speed=1.14x
frame= 328 fps= 35 q=29.0 size= 162kB time=00:00:10.24 bitrate= 129.5kbits/s speed= 1.1x
frame= 343 fps= 35 q=29.0 size= 172kB time=00:00:10.88 bitrate= 129.2kbits/s speed=1.11x
frame= 358 fps= 35 q=29.0 size= 180kB time=00:00:11.90 bitrate= 124.0kbits/s speed=1.15x
frame= 387 fps= 36 q=29.0 size= 195kB time=00:00:11.90 bitrate= 134.1kbits/s speed=1.09x
frame= 398 fps= 35 q=29.0 size= 202kB time=00:00:12.92 bitrate= 127.9kbits/s speed=1.14x
frame= 418 fps= 35 q=29.0 size= 213kB time=00:00:13.31 bitrate= 131.3kbits/s speed=1.12x
frame= 432 fps= 35 q=29.0 size= 222kB time=00:00:13.95 bitrate= 130.3kbits/s speed=1.13x
frame= 448 fps= 35 q=29.0 size= 230kB time=00:00:14.59 bitrate= 129.0kbits/s speed=1.13x
frame= 469 fps= 35 q=29.0 size= 242kB time=00:00:14.97 bitrate= 132.5kbits/s speed=1.11x
frame= 478 fps= 34 q=29.0 size= 247kB time=00:00:15.87 bitrate= 127.6kbits/s speed=1.14x
frame= 509 fps= 35 q=29.0 size= 259kB time=00:00:16.00 bitrate= 132.8kbits/s dup=1 drop=0 speed=1.11x
frame= 525 fps= 35 q=29.0 size= 266kB time=00:00:17.02 bitrate= 127.8kbits/s dup=1 drop=0 speed=1.13x
frame= 539 fps= 35 q=29.0 size= 271kB time=00:00:17.79 bitrate= 124.5kbits/s dup=1 drop=0 speed=1.15x
frame= 564 fps= 35 q=29.0 size= 285kB time=00:00:18.04 bitrate= 129.4kbits/s dup=1 drop=0 speed=1.13x
frame= 574 fps= 35 q=29.0 size= 290kB time=00:00:19.07 bitrate= 124.8kbits/s dup=1 drop=0 speed=1.15x
frame= 590 fps= 35 q=29.0 size= 297kB time=00:00:19.45 bitrate= 125.2kbits/s dup=1 drop=0 speed=1.14x
frame= 594 fps= 33 q=-1.0 Lsize= 328kB time=00:00:19.84 bitrate= 135.2kbits/s dup=1 drop=0 speed= 1.1x
video:246kB audio:70kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.381132%
[libx264 @ 0xb5bc4400] frame I:3 Avg QP:22.61 size: 4103
[libx264 @ 0xb5bc4400] frame P:230 Avg QP:25.04 size: 851
[libx264 @ 0xb5bc4400] frame B:361 Avg QP:28.82 size: 121
[libx264 @ 0xb5bc4400] consecutive B-frames: 1.2% 40.7% 37.9% 20.2%
[libx264 @ 0xb5bc4400] mb I I16..4: 4.0% 49.8% 46.1%
[libx264 @ 0xb5bc4400] mb P I16..4: 0.1% 0.3% 0.2% P16..4: 52.0% 27.1% 15.1% 0.0% 0.0% skip: 5.3%
[libx264 @ 0xb5bc4400] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 43.4% 2.1% 0.3% direct: 1.7% skip:52.5% L0:39.3% L1:55.4% BI: 5.3%
[libx264 @ 0xb5bc4400] 8x8 transform intra:51.7% inter:57.7%
[libx264 @ 0xb5bc4400] coded y,uvDC,uvAC intra: 81.9% 93.5% 80.4% inter: 11.9% 40.0% 17.4%
[libx264 @ 0xb5bc4400] i16 v,h,dc,p: 11% 25% 7% 57%
[libx264 @ 0xb5bc4400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 7% 20% 16% 6% 11% 5% 20% 6% 9%
[libx264 @ 0xb5bc4400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 22% 14% 5% 10% 7% 19% 5% 7%
[libx264 @ 0xb5bc4400] i8c dc,h,v,p: 61% 18% 10% 10%
[libx264 @ 0xb5bc4400] Weighted P-Frames: Y:24.3% UV:22.2%
[libx264 @ 0xb5bc4400] ref P L0: 57.6% 14.3% 16.8% 8.9% 2.3%
[libx264 @ 0xb5bc4400] ref B L0: 76.3% 19.1% 4.6%
[libx264 @ 0xb5bc4400] ref B L1: 91.9% 8.1%
[libx264 @ 0xb5bc4400] kb/s:101.58
[aac @ 0xb5bc4c00] Qavg: 64130.668
success ffmpeg
end encoding
ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/tempVid.mp4':
Metadata:
major_brand : 3gp4
minor_version : 0
compatible_brands: isom3gp4
creation_time : 2017-11-30 03:22:41
com.android.version: 6.0.1
Duration: 00:00:19.80, start: 0.000000, bitrate: 4246 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 176x144, 4112 kb/s, SAR 1:1 DAR 11:9, 29.94 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 270
creation_time : 2017-11-30 03:22:41
handler_name : VideoHandle
Side data:
displaymatrix: rotation of 90.00 degrees
Stream #0:1(eng): Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, flt, 12 kb/s (default)
Metadata:
creation_time : 2017-11-30 03:22:41
handler_name : SoundHandle
[libx264 @ 0xb5bc4400] using SAR=1/1
[libx264 @ 0xb5bc4400] using cpu capabilities: none!
[libx264 @ 0xb5bc4400] profile High, level 1.1
[libx264 @ 0xb5bc4400] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=5 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
[aac @ 0xb5bc4c00] Too many bits 20480.000000 > 6144 per frame requested, clamping to max
Output #0, ipod, to '/storage/emulated/0/target.m4a':
Metadata:
major_brand : 3gp4
minor_version : 0
compatible_brands: isom3gp4
com.android.version: 6.0.1
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 144x176 [SAR 1:1 DAR 9:11], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
Metadata:
handler_name : VideoHandle
creation_time : 2017-11-30 03:22:41
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 48 kb/s (default)
Metadata:
creation_time : 2017-11-30 03:22:41
handler_name : SoundHandle
encoder : Lavc57.24.102 aac
Stream mapping:
Stream #0:0 -> #0:0 (h26
</p> -
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,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.
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.
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