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Core Media Video
4 avril 2013, par
Mis à jour : Juin 2013
Langue : français
Type : Video
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
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Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
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MediaSPIP : Modification des droits de création d’objets et de publication définitive
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Sur d’autres sites (6763)
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ffmpeg DASH encoding : always getting bitrate as 200k for vp9 codec
29 novembre 2019, par SaurabhI am using following command, earlier put here : to generate DASH files :
ffmpeg -y -nostdin -loglevel error -i "$1" \
-map 0:v:0 -map 0:v:0 -map 0:v:0 -map 0:v:0 -map 0:v:0 -map 0:v:0 -map 0:a\?:0 \
-maxrate:v:0 350k -bufsize:v:0 700k -c:v:0 libx264 -filter:v:0 "scale=320:-2" \
-maxrate:v:1 1000k -bufsize:v:1 2000k -c:v:1 libx264 -filter:v:1 "scale=640:-2" \
-maxrate:v:2 3000k -bufsize:v:2 6000k -c:v:2 libx264 -filter:v:2 "scale=1280:-2" \
-maxrate:v:3 300k -minrate:v:3 100k -bufsize:v:3 600k -c:v:3 libvpx-vp9 -filter:v:3 "scale=320:-2" \
-maxrate:v:4 1088k -minrate:v:4 200k -bufsize:v:4 2176k -c:v:4 libvpx-vp9 -filter:v:4 "scale=640:-2" \
-maxrate:v:5 1500k -minrate:v:5 300k -bufsize:v:5 3000k -c:v:5 libvpx-vp9 -filter:v:5 "scale=1280:-2" \
-use_timeline 1 -use_template 1 -adaptation_sets "id=0,streams=0,1,2 id=1,streams=3,4,5 id=2,streams=a" \
-threads 8 -crf 3 -seg_duration 5 -hls_init_time 1 -hls_time 5 -hls_playlist true -f dash "$2"The issue is, in the output, I always get bandwidth as 200k for vp9 codec(see output below), while for same video bandwidth for h264 codec varies as par resolution and quite less, I expected vp9 to be even less as it compresses more. I have tested using multiple different options like :
-b:v
,-deadline
,-cpu-used
-crf
, etc, but not working expected with different values of these, What am I missing ?Sample output
mpd
file :<?xml version="1.0" encoding="utf-8"?>
<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT25.4S" minbuffertime="PT15.0S">
<programinformation>
</programinformation>
<period start="PT0.0S">
<adaptationset contenttype="video" segmentalignment="true" bitstreamswitching="true" lang="und">
<representation mimetype="video/mp4" codecs="avc1.64000c" bandwidth="104972" width="320" height="180" framerate="24000/1001">
<segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="130130"></s>
<s d="250250"></s>
<s d="176176"></s>
<s d="54054"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
<representation mimetype="video/mp4" codecs="avc1.64001e" bandwidth="227233" width="640" height="360" framerate="24000/1001">
<segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="130130"></s>
<s d="250250"></s>
<s d="180180"></s>
<s d="50050"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
<representation mimetype="video/mp4" codecs="avc1.64001f" bandwidth="616878" width="1280" height="720" framerate="24000/1001">
<segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="130130"></s>
<s d="250250"></s>
<s d="180180"></s>
<s d="50050"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
</adaptationset>
<adaptationset contenttype="video" segmentalignment="true" bitstreamswitching="true" lang="und">
<representation mimetype="video/mp4" codecs="vp09.00.11.08" bandwidth="200000" width="320" height="180" framerate="24000/1001">
<segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="128128" r="3"></s>
<s d="98098"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
<representation mimetype="video/mp4" codecs="vp09.00.21.08" bandwidth="200000" width="640" height="360" framerate="24000/1001">
<segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="128128" r="3"></s>
<s d="98098"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
<representation mimetype="video/mp4" codecs="vp09.00.31.08" bandwidth="200000" width="1280" height="720" framerate="24000/1001">
<segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="128128" r="3"></s>
<s d="98098"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
</adaptationset>
<adaptationset contenttype="audio" segmentalignment="true" bitstreamswitching="true" lang="eng">
<representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="128000" audiosamplingrate="44100">
<audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
<segmenttemplate timescale="44100" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
<segmenttimeline>
<s t="0" d="235520" r="3"></s>
<s d="180224"></s>
</segmenttimeline>
</segmenttemplate>
</representation>
</adaptationset>
</period>
</mpd>I am using this video, but it is coming same for all 30 sec video I have tried.
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amix filter is causing audio to disappear
21 novembre 2019, par MasonI’m trying overlay audio onto a video. I have a very simple ffmpeg command (
auido.mp3
is much longer than the video)ffmpeg -i video.mp4 -i audio.mp3 -filter_complex "[0:a] [1:a] amix=duration=shortest [a]" -map 0:v -map [a] test.mp4
This produces a silent video. However, when not mapping the video stream
ffmpeg -i video.mp4 -i audio.mp3 -filter_complex "[0:a] [1:a] amix=duration=shortest [a]" -map [a] test.mp4
The resulting audio file is as expected.
What could be causing this issues ?
(Is there a better way to overlay audio onto a video via ffmpeg ?)
Edit : log
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9.1.1 (GCC) 20190807
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --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-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
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
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2019-11-15T05:28:05.000000Z
Duration: 00:00:00.53, start: 0.000000, bitrate: 9463 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 9546 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
Metadata:
creation_time : 2019-11-15T05:28:05.000000Z
handler_name : ?Mainconcept Video Media Handler
encoder : AVC Coding
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
Metadata:
creation_time : 2019-11-15T05:28:05.000000Z
handler_name : #Mainconcept MP4 Sound Media Handler
[mp3 @ 000001fdf5f7f040] Estimating duration from bitrate, this may be inaccurate
Input #1, mp3, from 'audio.mp3':
Metadata:
date : 2019-11-14 23:31
id3v2_priv.XMP : <?xpacket begin="\xef\xbb\xbf" id="W5M0MpCehiHzreSzNTczkc9d"?>\x0a\x0a \x0a <rdf 256="256" kb="kb"></rdf>s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, fltp, 256 kb/s
Stream mapping:
Stream #0:1 (aac) -> amix:input0 (graph 0)
Stream #1:0 (mp3float) -> amix:input1 (graph 0)
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
amix (graph 0) -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 000001fdf64ab700] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000001fdf64ab700] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 000001fdf64ab700] 264 - core 158 r2984 3759fcb - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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 'test.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
encoder : Lavf58.29.100
Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
creation_time : 2019-11-15T05:28:05.000000Z
handler_name : ?Mainconcept Video Media Handler
encoder : Lavc58.54.100 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), 48000 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
encoder : Lavc58.54.100 aac
frame= 15 fps=0.0 q=-1.0 Lsize= 695kB time=00:00:00.40 bitrate=14232.7kbits/s speed=0.437x
video:693kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.226150%
[libx264 @ 000001fdf64ab700] frame I:1 Avg QP:30.52 size:101545
[libx264 @ 000001fdf64ab700] frame P:7 Avg QP:28.22 size: 44755
[libx264 @ 000001fdf64ab700] frame B:7 Avg QP:30.76 size: 42074
[libx264 @ 000001fdf64ab700] consecutive B-frames: 20.0% 40.0% 40.0% 0.0%
[libx264 @ 000001fdf64ab700] mb I I16..4: 68.3% 10.5% 21.2%
[libx264 @ 000001fdf64ab700] mb P I16..4: 17.6% 4.8% 4.3% P16..4: 28.5% 4.5% 2.8% 0.0% 0.0% skip:37.6%
[libx264 @ 000001fdf64ab700] mb B I16..4: 17.6% 2.4% 1.3% B16..8: 37.9% 6.7% 1.3% direct: 4.9% skip:27.8% L0:40.5% L1:54.3% BI: 5.2%
[libx264 @ 000001fdf64ab700] 8x8 transform intra:13.9% inter:59.5%
[libx264 @ 000001fdf64ab700] coded y,uvDC,uvAC intra: 54.5% 53.3% 42.3% inter: 15.3% 27.8% 21.6%
[libx264 @ 000001fdf64ab700] i16 v,h,dc,p: 5% 88% 5% 2%
[libx264 @ 000001fdf64ab700] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 53% 29% 1% 1% 1% 2% 1% 2%
[libx264 @ 000001fdf64ab700] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 6% 80% 9% 1% 1% 0% 1% 0% 2%
[libx264 @ 000001fdf64ab700] i8c dc,h,v,p: 16% 80% 3% 1%
[libx264 @ 000001fdf64ab700] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001fdf64ab700] ref P L0: 40.3% 4.9% 11.0% 43.8%
[libx264 @ 000001fdf64ab700] ref B L0: 80.0% 11.1% 8.9%
[libx264 @ 000001fdf64ab700] kb/s:11349.57
[aac @ 000001fdf64ac600] Qavg: 41522.195 -
FFplay only plays MPEG-DASH when in the same directory
26 mars 2020, par M. ParkerI’ve created a series of video segments using dashenc.c from ffmpeg’s libav on my windows machine. The mpd file is templated, so it’s fairly simple and it passes validation. The video plays, but only if I put ffplay in the same folder as all the files and use :
ffplay -i manifest.mpd
If I try to play from some other directory, or even the same directory using :
ffplay -i c:\tmp\manifest.mpd
or
ffplay -i c:/tmp/manifest.mpd
The attempt fails, producing this error :
[dash @ 0000016ce0d69900] Failed to open an initialization section in playlist 0
[dash @ 0000016ce0d69900] Error when loading first fragment, playlist 0
C:/tmp/manifest.mpd: Invalid argumentThe mpd file :
<?xml version="1.0" encoding="utf-8"?>
<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" minimumupdateperiod="PT500S" suggestedpresentationdelay="PT4S" availabilitystarttime="2020-03-23T14:54:16Z" publishtime="2020-03-23T14:54:25Z" timeshiftbufferdepth="PT4811H53M52.3S" minbuffertime="PT9.6S">
<programinformation>
</programinformation>
<period start="PT0.0S">
<adaptationset contenttype="video" segmentalignment="true" bitstreamswitching="true">
<representation mimetype="video/mp4" codecs="avc1.42001e" bandwidth="5953124" width="720" height="480">
<segmenttemplate timescale="1000000" duration="5000000" availabilitytimeoffset="4.967" initialization="init-stream$RepresentationID$.m4s" media="media-stream$RepresentationID$-$Number%06d$.m4s" startnumber="1">
</segmenttemplate>
</representation>
</adaptationset>
</period>
</mpd>Adding in a BaseUrl element didn’t help ; my guess is I’m formatting it wrong. Any ideas what I might do to fix this ?