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  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
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    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

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Sur d’autres sites (15032)

  • Live stream multi-bitrate video

    2 septembre 2017, par Rishabh

    Preface

    I have read this two part tutorial (Part-1 and Part-2) by Steamroot on MPEG-DASH, and below is my understanding (please correct me if I am wrong) :

    • The video needs to be encoded into multiple bit-rates using FFmpeg.
    • The encoded videos need to be transcoded (dashified) using MP4Box.
    • The dashified videos can be served using a web server.

    Problem

    I intend to live-stream an event and I need help to understand the following :

    1. Can I club the FFmpeg and MP4Box commands into a single step ? Maybe through a wrapper program so that I do not have to run them separately ? Is there any other or better solution ?
    2. How do I send the dashified content to the web server ? FTP ? Would any vanilla web server do ?
    3. Lastly, a friend had hinted that I could also use GStreamer to achieve my objective. But, I could not find any good resource on the internet for the same. So, where (and how) does GStreamer fit in the above process ?

  • Automatic encoder selection failed Default encoder for format mp3 is probably disabled. Please choose an encoder manually.Error selecting an encoder

    27 janvier 2018, par Parimal Desai

    using ffmpeg compressing song to low quality getting error for

    "Automatic encoder selection failed for output stream #0:1. Default encoder for format mp3 (codec mp3) is probably disabled. Please choose an encoder manually. Error selecting an encoder for stream 0:1"

    ffmpeg -i /home/smubu/public_html/uploads/tracks/47865540_1999341734_1027911481.mp3 -ab 64 /home/smubu/public_html/uploads/tracks/47865540_1999341734_1027911481_comp_96.mp3
    

    
ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)
    
  configuration:
    
  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
    
[mp3 @ 0x218e380] Estimating duration from bitrate, this may be inaccurate
    
Input #0, mp3, from '/home/smubu/public_html/uploads/tracks/47865540_1999341734_1027911481.mp3':
    
  Metadata:
    
    encoder         : LAME 32bits version 3.98.2 (http://www.mp3dev.org/)
    
    title           : Dj.Senior'B Kantinti [Club Rmx
    
    track           : 2010
    
    comment         : Downloaded from Howwe Entertainment [ www.howwe.biz ]
    
    TEXT            : 2010
    
    TLEN            : 97391548
    
    artist          : Stecia Mayanja
    
    album_artist    : www.howwe.biz
    
    composer        : www.howwe.biz
    
    album           : Howwe Entertainment
    
    genre           : www.howwe.biz
    
    date            : 2010
    
  Duration: 00:03:46.34, start: 0.000000, bitrate: 81 kb/s
    
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 80 kb/s
    
    Stream #0:1: Video: png, rgba(pc), 600x600, 90k tbr, 90k tbn, 90k tbc
    
    Metadata:
    
      comment         : Other
    
Automatic encoder selection failed for output stream #0:1. Default encoder for format mp3 (codec mp3) is probably disabled. Please choose an encoder manually.
    
Error selecting an encoder for stream 0:1

    Help me regarding this issue

  • Transcode each stream in a different thread with ffmpeg

    30 mai 2018, par hedgar2017

    Is there a way of forcing ffmpeg to encode each audio stream in a different thread ?

    ffmpeg
    
    -i audio1.ac3 -c:a libopus
    
    -i audio2.ac3 -c:a libopus
    
    -i audio3.ac3 -c:a libopus
    
    output.mkv

    I mean only ffmpeg’s own instruments, without multiple processes and other OS features.

    Normally, there is only one core saturated, so encoding a file with many audio streams is very long.

    Exact command :

    ffmpeg -loglevel verbose
    
    -i 'Ярость (Fury).mkv'
    
    -i 'Fury (2014) [Ukr & Eng, Sub Eng] BDRip-AVC [Hurtom & HELLYWOOD].mkv'
    
    -threads 0 -max_muxing_queue_size 65536 -avoid_negative_ts 1 -metadata title=2014.Fury.BDRip.HEVC.1080p
    
    -map 0:0 -c:v copy -metadata:s:v:0 title=2014.Fury.BDRip.HEVC.1080p -disposition:v:0 +defaug-[forced
    
    -map 0:2 -c:a libopus -application audio -vbr on -packet_loss 0 -frame_duration 20 -mapping_family 255 -compression_level 10 -metadata:s:a:0 language=eng -metadata:s:a:0 title=Original -disposition:a:0 +defaug-[forced
    
    -map 1:1 -c:a libopus -application audio -vbr on -packet_loss 0 -frame_duration 20 -mapping_family 255 -compression_level 10 -metadata:s:a:1 language=ukr -disposition:a:1 -default-forced
    
    -map 0:1 -c:a libopus -application audio -vbr on -packet_loss 0 -frame_duration 20 -mapping_family 255 -compression_level 10 -metadata:s:a:2 language=rus -metadata:s:a:2 title=Dub -disposition:a:2 -default-forced
    
    -map 0:10 -c:s copy -metadata:s:s:0 language=eng -metadata:s:s:0 title=Original -disposition:s:0 -default-forced
    
    -f matroska ./2014.Fury.BDRip.HEVC.1080p.mkv

    Log :

    ... inputs ...
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:2 -> #0:1 (dts (dca) -> opus (libopus))
    
  Stream #1:1 -> #0:2 (ac3 (native) -> opus (libopus))
    
  Stream #0:1 -> #0:3 (ac3 (native) -> opus (libopus))
    
  Stream #0:10 -> #0:4 (copy)
    
Press [q] to stop, [?] for help
    
[graph_2_in_0_1 @ 0000019ca2cb29c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
    
[format_out_0_3 @ 0000019ca2cb20c0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_3'
    
[auto_resampler_0 @ 0000019ca2cb27c0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:flt r:48000Hz
    
[libopus @ 0000019ca2c9f3c0] No bit rate set. Defaulting to 384000 bps.
    
[graph_0_in_0_2 @ 0000019ca2cb1ac0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
    
[format_out_0_1 @ 0000019ca2cb1bc0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
    
[auto_resampler_0 @ 0000019ca2cb14c0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:flt r:48000Hz
    
[libopus @ 0000019ca292c980] No bit rate set. Defaulting to 384000 bps.
    
[graph_1_in_1_1 @ 0000019ca2cb2bc0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
    
[format_out_0_2 @ 0000019ca2cb26c0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_2'
    
[auto_resampler_0 @ 0000019ca2cb0dc0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:flt r:48000Hz
    
[libopus @ 0000019ca292e980] No bit rate set. Defaulting to 384000 bps.
    
Output #0, matroska, to './2014.Fury.BDRip.HEVC.1080p.mkv':
    
  Metadata:
    
    DATE_RELEASED   : 2014
    
    title           : 2014.Fury.BDRip.HEVC.1080p
    
    Released by     : Buba5473 for NNM-Club
    
    Copyright       : Encoded by Goor80
    
    encoder         : Lavf58.12.100
    
    Chapter #0:0: start 0.000000, end 478.228000
    
    Metadata:
    
      title           : Chapter 01
    
    ... chapters ...
    
    Stream #0:0: Video: hevc (Main 10), 1 reference frame, yuv420p10le(tv), 1920x800 (0x0) [SAR 1:1 DAR 12:5], q=2-31, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default)
    
    Stream #0:1(eng): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1(side), flt, delay 312, 384 kb/s (default)
    
    Stream #0:2(ukr): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1(side), flt, delay 312, 384 kb/s
    
    Stream #0:3(rus): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1(side), flt, delay 312, 384 kb/s
    
    Stream #0:4(eng): Subtitle: subrip
    
[matroska @ 0000019ca2d17f00] Starting new cluster due to timestamp=6175.5kbits/s speed=10.2x
    
[matroska @ 0000019ca2d17f00] Starting new cluster due to timestamp=7530.8kbits/s speed=8.74x
    
[matroska @ 0000019ca2d17f00] Starting new cluster due to timestamp=7955.1kbits/s speed=9.02x
    
frame=156607 fps=205 q=-1.0 size= 8321971kB time=01:48:51.85 bitrate=10437.1kbits/s speed=8.55x
    
... not finished yet ...

    fps is always around 3000/number_of_audio_channels, meaning all audio transcoding is done with the only thread.

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