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Autres articles (8)

Contribute to documentation

13 avril 2011

Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...)
Keeping control of your media in your hands

13 avril 2011, par kent1

The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)
Installation en mode ferme

4 février 2011, par kent1

Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

1 | 2 | 3

Sur d’autres sites (3418)

ffmpeg weird x264 encoding behavior

1er février 2016, par JMor

I have a captured a 720x480 video with a display aspect ratio of 16:9 which I want to crop, resize and pad, but just the x264 encoding command is giving me a headache.

(Screenshot of input.m2v) Here is my command :

ffmpeg -ss 1861 -i input.m2v -c:v libx264 -profile:v main -preset:v medium -level 3.1 -x264opts crf=21.228 -t 60 -y -f mp4 output.mp4

And here is the ffmpeg output :

(Screen shot of output.mp4)

Input #0, mpegvideo, from 'input.m2v':

  Duration: N/A, bitrate: N/A

    Stream #0:0: Video: mpeg2video (Main), yuv420p(tv), 720x480 [SAR 32:27 DAR 1

6:9], max. 6605 kb/s, 31.02 fps, 59.94 tbr, 1200k tbn, 59.94 tbc

[libx264 @ 02ba84c0] using SAR=32/27

[libx264 @ 02ba84c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX

[libx264 @ 02ba84c0] profile Main, level 3.1

[libx264 @ 02ba84c0] 264 - core 144 r2525 40bb568 - H.264/MPEG-4 AVC codec - Cop

yleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb

lock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m

e_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chro

ma_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 scene

cut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=21.2 qcomp=0.60 qpmin

=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00

Output #0, mp4, to 'output.mp4':

  Metadata:

    encoder         : Lavf56.19.100

    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x48

0 [SAR 32:27 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc

    Metadata:

      encoder         : Lavc56.21.102 libx264

Stream mapping:

  Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))

The output size is 720x480, displayed as 853x480, as expected.
But it looks like the frame has been vertically scaled by a factor of 1.18 and then cropped to a height of 480, so that I am losing the top and bottom of the frame. In fact, the behavior is equivalent to :

-vf "scale=720:569,crop=720:480:0:0"

Although I assume the aspect ratio plays a part here (I think the 1.18 factor is really (16/9)/(720/480)) I am surprised that ffmpeg would do that out of the blue. May be someone more knowledgeable than me could explain it ?

FFMPEG Incorrect Stream Index Matching with -var_stream_map

28 décembre 2018, par Hugo

I am using a bash script to run an FFMPEG command to turn an input file called Awoo.mkv into three HLS playlists each with a different resolution, video and audio bitrate.

This is the script :

name=gw



rm /tmp/hls/*



./ffmpeg -y \

    -stream_loop -1 -re \

    -i Awoo.mkv \

    -b:v:0 4000k -b:a:0 512k -s:0 1920x1080 -r:0 30 -g:0 90 -preset:0 superfast -tune:0 zerolatency -profile:v:0 high -level:v:0 4 \

    -b:v:1 2500k -b:a:1 256k -s:1 1280x720 -r:1 30 -g:1 90 -preset:1 superfast -tune:1 zerolatency -profile:v:1 high -level:v:1 4 \

    -b:v:2 800k -b:a:2 255k -s:2 960x540 -r:2 30 -g:2 90 -preset:2 superfast -tune:2 zerolatency -profile:v:2 high -level:v:2 4 \

    -hls_time 6 \

    -hls_list_size 2 \

    -hls_flags delete_segments \

    -map 0:v -map 0:a -map 0:v -map 0:a -map 0:v -map 0:a \

    -var_stream_map "v:0,a:0 v:1,a:1 v:2,a:2" \

    -f hls -master_pl_name "${name}.m3u8" \

    -hls_segment_filename "/tmp/hls/${name}_-%d-%v.ts" \

    "/tmp/hls/${name}_%v.m3u8"

This almost works great, but the output is slightly off...

If you look at these two lines :

-b:v:1 2500k -b:a:1 256k -s:1 1280x720 -r:1 30 -g:1 90 -preset:1 superfast -tune:1 zerolatency -profile:v:1 high -level:v:1 4 \

-b:v:2 800k -b:a:2 255k -s:2 960x540 -r:2 30 -g:2 90 -preset:2 superfast -tune:2 zerolatency -profile:v:2 high -level:v:2 4 \

A resolution of 1280x720 should have a bitrate of 2500k, a resolution of 960x540 should have a bitrate of 800k.

This is the relevant output from FFMPEG :

Stream #0:2(und): Video: h264 (libx264), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], q=-1--1, 2500 kb/s, 30 fps, 90k tbn, 30 tbc (default)

Metadata:

  CREATION_TIME   : 2017-01-27 05:02:53

  LANGUAGE        : und

  HANDLER_NAME    : VideoHandler

  DURATION        : 00:02:24.310000000

  encoder         : Lavc58.18.100 libx264

Side data:

  cpb: bitrate max/min/avg: 0/0/2500000 buffer size: 0 vbv_delay: -1

Stream #0:3(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 256 kb/s (default)

Metadata:

  LANGUAGE        : eng

  DURATION        : 00:02:24.348000000

  encoder         : Lavc58.18.100 aac

Stream #0:4(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 800 kb/s, 29 fps, 90k tbn, 29 tbc (default)

Metadata:

  CREATION_TIME   : 2017-01-27 05:02:53

  LANGUAGE        : und

  HANDLER_NAME    : VideoHandler

  DURATION        : 00:02:24.310000000

  encoder         : Lavc58.18.100 libx264

Side data:

  cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: -1

Stream #0:5(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 255 kb/s (default)

Metadata:

  LANGUAGE        : eng

  DURATION        : 00:02:24.348000000

  encoder         : Lavc58.18.100 aac

Stream #0:2 is given the wrong resolution of 960x540, and therefore also the wrong bitrate of 2500. This should be the resolution of 1280x720, but this is below matched with the bitrate of 800.

From what I know, the resolutions are showing in the wrong order, if 720 was first and 540 after then everything would match up fine. I’m not sure what’s causing this, I am new to the -var_stream_map.

If it is relevant, the entire output from FFMPEG is below :

ffmpeg version 4.0.3-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers

  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516

  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg

  libavutil      56. 14.100 / 56. 14.100

  libavcodec     58. 18.100 / 58. 18.100

  libavformat    58. 12.100 / 58. 12.100

  libavdevice    58.  3.100 / 58.  3.100

  libavfilter     7. 16.100 /  7. 16.100

  libswscale      5.  1.100 /  5.  1.100

  libswresample   3.  1.100 /  3.  1.100

  libpostproc    55.  1.100 / 55.  1.100

Input #0, matroska,webm, from 'Awoo.mkv':

  Metadata:

    COMPATIBLE_BRANDS: iso6avc1mp41

    MAJOR_BRAND     : dash

    MINOR_VERSION   : 0

    ENCODER         : Lavf56.40.101

  Duration: 00:02:24.35, start: 0.000000, bitrate: 1114 kb/s

    Stream #0:0(und): Video: h264 (Main), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 29 fps, 29 tbr, 1k tbn, 58 tbc (default)

    Metadata:

      CREATION_TIME   : 2017-01-27 05:02:53

      LANGUAGE        : und

      HANDLER_NAME    : VideoHandler

      DURATION        : 00:02:24.310000000

    Stream #0:1(eng): Audio: vorbis, 44100 Hz, stereo, fltp (default)

    Metadata:

      LANGUAGE        : eng

      DURATION        : 00:02:24.348000000

Stream mapping:

  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))

  Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))

  Stream #0:0 -> #0:2 (h264 (native) -> h264 (libx264))

  Stream #0:1 -> #0:3 (vorbis (native) -> aac (native))

  Stream #0:0 -> #0:4 (h264 (native) -> h264 (libx264))

  Stream #0:1 -> #0:5 (vorbis (native) -> aac (native))

Press [q] to stop, [?] for help

[libx264 @ 0x664d1c0] using SAR=1/1

[libx264 @ 0x664d1c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX

[libx264 @ 0x664d1c0] profile High, level 4.0, 4:2:0, 8-bit

[libx264 @ 0x664d1c0] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=90 keyint_min=9 scenecut=40 intra_refresh=0 rc=abr mbtree=0 bitrate=4000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00

[libx264 @ 0x664f080] using SAR=1/1

[libx264 @ 0x664f080] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX

[libx264 @ 0x664f080] profile High, level 4.0, 4:2:0, 8-bit

[libx264 @ 0x664f080] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=90 keyint_min=9 scenecut=40 intra_refresh=0 rc=abr mbtree=0 bitrate=2500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00

[libx264 @ 0x6680b80] using SAR=1/1

[libx264 @ 0x6680b80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX

[libx264 @ 0x6680b80] profile High, level 4.0, 4:2:0, 8-bit

[libx264 @ 0x6680b80] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=abr mbtree=1 bitrate=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00

[hls @ 0x6650000] Opening '/tmp/hls/gw_-0-0.ts' for writing

[hls @ 0x6650000] Opening '/tmp/hls/gw_-0-1.ts' for writing

[hls @ 0x6650000] Opening '/tmp/hls/gw_-0-2.ts' for writing

Output #0, hls, to '/tmp/hls/gw_%v.m3u8':

  Metadata:

    COMPATIBLE_BRANDS: iso6avc1mp41

    MAJOR_BRAND     : dash

    MINOR_VERSION   : 0

    encoder         : Lavf58.12.100

    Stream #0:0(und): Video: h264 (libx264), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 4000 kb/s, 30 fps, 90k tbn, 30 tbc (default)

    Metadata:

      CREATION_TIME   : 2017-01-27 05:02:53

      LANGUAGE        : und

      HANDLER_NAME    : VideoHandler

      DURATION        : 00:02:24.310000000

      encoder         : Lavc58.18.100 libx264

    Side data:

      cpb: bitrate max/min/avg: 0/0/4000000 buffer size: 0 vbv_delay: -1

    Stream #0:1(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 512 kb/s (default)

    Metadata:

      LANGUAGE        : eng

      DURATION        : 00:02:24.348000000

      encoder         : Lavc58.18.100 aac

    Stream #0:2(und): Video: h264 (libx264), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], q=-1--1, 2500 kb/s, 30 fps, 90k tbn, 30 tbc (default)

    Metadata:

      CREATION_TIME   : 2017-01-27 05:02:53

      LANGUAGE        : und

      HANDLER_NAME    : VideoHandler

      DURATION        : 00:02:24.310000000

      encoder         : Lavc58.18.100 libx264

    Side data:

      cpb: bitrate max/min/avg: 0/0/2500000 buffer size: 0 vbv_delay: -1

    Stream #0:3(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 256 kb/s (default)

    Metadata:

      LANGUAGE        : eng

      DURATION        : 00:02:24.348000000

      encoder         : Lavc58.18.100 aac

    Stream #0:4(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 800 kb/s, 29 fps, 90k tbn, 29 tbc (default)

    Metadata:

      CREATION_TIME   : 2017-01-27 05:02:53

      LANGUAGE        : und

      HANDLER_NAME    : VideoHandler

      DURATION        : 00:02:24.310000000

      encoder         : Lavc58.18.100 libx264

    Side data:

      cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: -1

    Stream #0:5(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 255 kb/s (default)

    Metadata:

      LANGUAGE        : eng

      DURATION        : 00:02:24.348000000

      encoder         : Lavc58.18.100 aac

[hls @ 0x6650000] Opening '/tmp/hls/gw_0.m3u8.tmp' for writing6.50 bitrate=N/A dup=12 drop=0 speed=0.965x    

[hls @ 0x6650000] Opening '/tmp/hls/gw_1.m3u8.tmp' for writing

[hls @ 0x6650000] Opening '/tmp/hls/gw_2.m3u8.tmp' for writing

[hls @ 0x6650000] Opening '/tmp/hls/gw.m3u8' for writing

ffmpeg RTSP MPEG4 to h.264 RTSP not streaming

25 août 2017, par martyn

I’m trying to re stream a RTSP feed and convert to h264.

I’m using the following command line :

C:\Users\Martyn>ffmpeg -re -i rtsp://192.168.2.207/VideoInput/1/mpeg4/ -preset ultrafast -vcodec libx264 -tune zerolatency -b:v 900k -f rtsp udp://192.168.0.2:1234

The output I get is :

C:\Users\Martyn>ffmpeg -re -i rtsp://192.168.2.207/VideoInput/1/mpeg4/ -preset u

ltrafast -vcodec libx264 -tune zerolatency -b:v 900k -f rtsp udp://192.168.0.2:1

234

ffmpeg version N-87043-gf0f48884b0 Copyright (c) 2000-2017 the FFmpeg developers



  built with gcc 7.2.0 (Rev1, Built by MSYS2 project)

  configuration:  --enable-avisynth --enable-gcrypt --enable-libmp3lame --enable

-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --

enable-cuda --enable-cuvid --enable-schannel --disable-w32threads --extra-cflags

=-DPTW32_STATIC_LIB --extra-libs=-lpthread --extra-libs=-lwsock32 --enable-gpl -

-disable-debug

  libavutil      55. 74.100 / 55. 74.100

  libavcodec     57.103.100 / 57.103.100

  libavformat    57. 77.100 / 57. 77.100

  libavdevice    57.  7.101 / 57.  7.101

  libavfilter     6.100.100 /  6.100.100

  libswscale      4.  7.103 /  4.  7.103

  libswresample   2.  8.100 /  2.  8.100

  libpostproc    54.  6.100 / 54.  6.100

Input #0, rtsp, from 'rtsp://192.168.2.207/VideoInput/1/mpeg4/':

  Metadata:

    title           : MC153906N015_Camera_1

  Duration: N/A, start: 0.040000, bitrate: N/A

    Stream #0:0: Video: mpeg4 (Simple Profile), yuv420p, 1920x1080 [SAR 1:1 DAR

16:9], 25 tbr, 90k tbn, 1k tbc

Stream mapping:

  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))

Press [q] to stop, [?] for help

[libx264 @ 0000000002c422c0] using SAR=1/1

[libx264 @ 0000000002c422c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2

AVX

[libx264 @ 0000000002c422c0] profile Constrained Baseline, level 4.0

[libx264 @ 0000000002c422c0] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC cod

ec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 r

ef=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 ch

roma_qp_offset=0 threads=8 lookahead_threads=8 sliced_threads=1 slices=8 nr=0 de

cimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 ke

yint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=abr mbtree=0 bitrate=900 ra

tetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0

How do I know if this is streaming or not ? when I try to connect to udp ://192.168.0.2:1234 nothing happens.

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Keeping control of your media in your hands

Installation en mode ferme

Sur d’autres sites (3418)

ffmpeg weird x264 encoding behavior

FFMPEG Incorrect Stream Index Matching with -var_stream_map

ffmpeg RTSP MPEG4 to h.264 RTSP not streaming

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