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• Mozilla Firefox 36 has problems playing my h264 MP4 files

  11 juin 2015, par Wolfgang Pürstner

  I try to convert videos with ffmpeg to mp4 format (h264) Profile : High Level : 3.1 (1280x720 with 30fps), Bitrate 1500k

  The video plays very well in every browser except in Firefox.

  http://5.79.72.89/trailer/trailer.mp4

  At first it needs longer to load and when I seek inside the video most times the video don’t stop to load and never plays again.
  I can see a lot of partial downloads in the developer console. A lot of them are for the initial play and the rest of the requests are during the video load when I seek to a later position.

  

  When I play other h264 Videos (MP4 with similar settings) they play without problems on this server.
  And when I put my video on another webserver (apache) there are the same problems with Firefox.

  For this reason I believe it has to do something with me my conversion.

  My settings :
  Debian 7 (wheezy)
  Webserver : nginx (with 260k bandwidth limit)

  I started converting videos with avconv and switched to ffmpeg because of this problems. But there was no success.
  Meanwhile I tried all options for encoding but there are always the same problems with Firefox. Other videos play well but not mines and I don’t know why.

  Command :

  ffmpeg -i input.mp4 -tune zerolatency -x264opts bitrate=1500:vbv-maxrate=1500:vbv-bufsize=3000:nal-hrd=vbr -codec:v libx264 -profile:v high -level 3.1 -movflags +faststart -pix_fmt yuv420p  -s 1280x720 -r 30 -ac 2 -ar 48000 -codec:a aac -ab 64k -strict experimental -y trailer.mp4
  

  ffmpeg 1.0.10
  libavutil      51. 73.101 / 51. 73.101
  libavcodec     54. 59.100 / 54. 59.100
  libavformat    54. 29.104 / 54. 29.104
  libavdevice    54.  2.101 / 54.  2.101
  libavfilter     3. 17.100 /  3. 17.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
  

  Mediainfo of the file : trailer.mp4

  General
  Complete name : trailer.mp4
  Format : MPEG-4
  Format profile : Base Media
  Codec ID : isom
  File size : 115 MiB
  Duration : 10mn 34s
  Overall bit rate : 1 516 Kbps
  Movie name : Big Buck Bunny, Sunflower version
  Performer : Blender Foundation 2008, Janus Bager Kristensen 2013
  Composer : Sacha Goedegebure
  Genre : Animation
  Writing application : Lavf54.29.104
  Comment : Creative Commons Attribution 3.0 - http://bbb3d.renderfarming.net
  Video
  
  ID : 1
  
  Format : AVC
  
  Format/Info : Advanced Video Codec
  
  Format profile : High@L3.1
  
  Format settings, CABAC : Yes
  
  Format settings, ReFrames : 4 frames
  
  Codec ID : avc1
  
  Codec ID/Info : Advanced Video Coding
  
  Duration : 10mn 34s
  
  Bit rate : 1 500 Kbps
  
  Width : 1 920 pixels
  
  Height : 1 080 pixels
  
  Display aspect ratio : 16:9
  
  Frame rate mode : Constant
  
  Frame rate : 30.000 fps
  
  Color space : YUV
  
  Chroma subsampling : 4:2:0
  
  Bit depth : 8 bits
  
  Scan type : Progressive
  
  Bits/(Pixel*Frame) : 0.024
  
  Stream size : 109 MiB (95%)
  
  Writing library : x264 core 132
  
  Encoding settings : cabac=1 / ref=4 / 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=50 / keyint_min=5 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=cbr / mbtree=1 / bitrate=1500 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=1500 / vbv_bufsize=3000 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
  Audio
  
  ID : 2
  
  Format : AAC
  
  Format/Info : Advanced Audio Codec
  
  Format profile : LC
  
  Codec ID : 40
  
  Duration : 10mn 34s
  
  Duration_LastFrame : -11ms
  
  Bit rate mode : Constant
  
  Bit rate : 64.2 Kbps
  
  Channel(s) : 2 channels
  
  Channel positions : Front : L R
  
  Sampling rate : 48.0 KHz
  
  Compression mode : Lossy
  
  Delay relative to video : -2ms
  
  Stream size : 4.85 MiB (4%)
  

  I don’t know what is wrong with my files.

  Update 2015-03-12 :

  If I convert the video without audio stream there is no problem with firefox anymore.

  I updated ffmpeg to 2.6. I used libfaac, aac and libfdk_aac for audio encoding with cbr and vbr but without success.

• libavcodec/amfenc : Vulkan initialization support for encoder.

  8 août 2019, par OvchinnikovDmitrii

  libavcodec/amfenc : Vulkan initialization support for encoder.
  Added linux support for amf encoder through vulkan.
  To use h.264(AMD VCE) encoder on linux amdgru-pro version 19.20+ and
  
  amf-amdgpu-pro package(amdgru-pro contains, but does not install
  
  automatically) are required.
  This driver can be installed using amdgpu-pro-install script in
  
  official amd driver archive.
  Initialization of amf encoder occurs in this order :
  
  1) trying to initialize through dx11(only windows)
  
  2) trying to initialize through dx9(only windows)
  
  3) trying to initialize through vulkan
  Only Vulkan initialization available on linux.
  

  • [DH] Changelog
  • [DH] doc/general.texi
  • [DH] libavcodec/amfenc.c
  • [DH] libavcodec/version.h

• Why does mplayer not play my stream ?

  17 juillet 2016, par SirWindfield

  I wanted to use mplayer (a command line tool) to play a SoundCloud url that I fetched with there official API. The url looks like this

  https://cf-media.sndcdn.com/qop35iYKlHhs.128.mp3?Policy=eyJTdGF0ZW1lbnQiOlt7IlJlc291cmNlIjoiKjovL2NmLW1lZGlhLnNuZGNkbi5jb20vcW9wMzVpWUtsSGhzLjEyOC5tcDMiLCJDb25kaXRpb24iOnsiRGF0ZUxlc3NUaGFuIjp7IkFXUzpFcG9jaFRpbWUiOjE0Njg3NTM4NjB9fX1dfQ__&Signature=OZ4IawmjdU6hEN8KB8e~t3QTy4lBFVBbIDg-a6tuPkb65e0mPskkCFFASkTWbyy5lsaT9IrURan6y70sZhLXPbng1IfkTsGdX1dO938NwVYnKs-BS7IL4TiVFxTBXoKJgmCmUD0qmmGmYqm3YdGZQrP~Sj~mw9~fmtwdHQu0rhl3O-dKsgk497JAR6pMorQs7BSs0XIosV1Mmv2DMD6iifquCWV9Ezq4ekneQ1gfSjVmzjjnKvsxjPpgmU~5DTdewwzlNClVxdzHSQONWM7c0YMGlBcVz97NviaeZOQSCAW8QZS59WULXJBJ9OmEPctWtpe3O0mo-GYjwEkbVGYl9A__&Key-Pair-Id=APKAJAGZ7VMH2PFPW6UQ

  I use the command "mplayer ’url’" to play it but I always get the output :

  libavformat version 57.25.100 (internal)
  
  https protocol not found, recompile FFmpeg with openssl, gnutls,
  
  or securetransport enabled.

  Looking which protocols have been installed tells me that I have https input and output support (ffmpeg -protocols) :

  ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.3.0 (clang-703.0.31)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.1.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libfaac --enable-ffplay --enable-libspeex --enable-openssl --enable-libopus --disable-lzma --enable-nonfree --enable-vda
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Supported file protocols:
  
  Input:
  
    async
  
    cache
  
    concat
  
    crypto
  
    data
  
    file
  
    ftp
  
    gopher
  
    hls
  
    http
  
    httpproxy
  
    https
  
    mmsh
  
    mmst
  
    pipe
  
    rtp
  
    srtp
  
    subfile
  
    tcp
  
    tls
  
    udp
  
    udplite
  
    unix
  
    rtmp
  
    rtmpe
  
    rtmps
  
    rtmpt
  
    rtmpte
  
  Output:
  
    crypto
  
    file
  
    ftp
  
    gopher
  
    http
  
    httpproxy
  
    https
  
    icecast
  
    md5
  
    pipe
  
    rtp
  
    srtp
  
    tcp
  
    tls
  
    udp
  
    udplite
  
    unix
  
    rtmp
  
    rtmpe
  
    rtmps
  
    rtmpt
  
    rtmpte