Recherche avancée

Médias (1)

Mot : - Tags -/Christian Nold

Autres articles (56)

Sur d’autres sites (8707)

  • ffmpeg export multichannel audio Stereo won't play [migrated]

    9 avril 2014, par speedyrazor

    I am trying to export all audio channels from a multichannel quicktime file with ffmpeg which has the following audio configuration, but am unsure if the command below is correct. All the files look and play correct in Quicktime player except the L+R_Total.wav which refuses to play in Quicktime player or Final Cut but plays fine in VLC, so i'm sure my ffmpeg command is not correct for the stereo on Track 7. The Stereo file is about 1.8GB in size. Here is my track layout in the Quicktime file :

    Track 1 - mono
    
Track 2 - mono
    
Track 3 - mono
    
Track 4 - mono
    
Track 5 - mono
    
Track 6 - mono
    
Track 7 - stereo

    I am using :

    /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav

    Here is the printout from the terminal :

        MacBook-Pro:~ me$ /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav
    
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Mar 25 2014 15:00:55 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
    
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
    
  libavutil      52. 66.100 / 52. 66.100
    
  libavcodec     55. 52.102 / 55. 52.102
    
  libavformat    55. 33.100 / 55. 33.100
    
  libavdevice    55. 10.100 / 55. 10.100
    
  libavfilter     4.  2.100 /  4.  2.100
    
  libswscale      2.  5.102 /  2.  5.102
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/me/Desktop/test.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    creation_time   : 2014-03-06 11:25:34
    
  Duration: 00:01:03.48, start: 0.000000, bitrate: 153967 kb/s
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 144704 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32, 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:8(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:26:04
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
Output #0, wav, to 'Left.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #0:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #1, wav, to 'Right.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #1:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #2, wav, to 'Center.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #2:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #3, wav, to 'LFE.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #3:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #4, wav, to 'Left_Surround.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #4:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #5, wav, to 'Right_Surround.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #5:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #6, wav, to 'Left+Right_Total.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #6:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, downmix, s32, 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:2 -> #1:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:3 -> #2:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:4 -> #3:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:5 -> #4:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:6 -> #5:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:7 -> #6:0 (pcm_s24le -> pcm_s24le)
    
Press [q] to stop, [?] for help
    
size=    8927kB time=00:01:03.48 bitrate=1152.0kbits/s    
    
video:0kB audio:71415kB subtitle:0 data:0 global headers:0kB muxing overhead -87.499863%

  • Rotate video, output maximum 1920 x 1080 pixels

    9 avril 2014, par Fabien Biller

    I used

    ffmpeg.exe -ss 310 -i "H:\_REC\100MEDIA\someavi.AVI" -ss 0 -t 14 -vf "rotate='54*PI/180:ow=hypot(iw,ih):oh=ow'" -vf scale=1920:1080 "H:\_REC\100MEDIA\somemp4.mp4"

    which should rotate the video(currently 1920 x 1080, MJPEG, 30fps) around 54° and fit it into 1920 x 1080 Pixels.

    What it does is, it ignores the -vf "rotate='54*PI/180:ow=hypot(iw,ih):oh=ow'" -vf scale=1920:1080 and returns the snippet.

    What to change ?

    PS : ffmpeg version N-59696-gc0a33c4

    OUTPUT :

    E:\Ffmpeg\bin>ffmpeg -ss 310 -i "H:\_REC\100MEDIA\someavi.AVI"
    
 -ss 0 -t 14 -vf "rotate='54*PI/180:ow=hypot(iw,ih):oh=ow'" -vf sca
    
le=1920:1080 "H:\_REC\100MEDIA\somemp4.mp4"
    
ffmpeg version N-59696-gc0a33c4 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Jan  8 2014 22:07:06 with gcc 4.8.2 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
    
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
    
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
    
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
    
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
    
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
    
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
    
  libavutil      52. 62.100 / 52. 62.100
    
  libavcodec     55. 47.100 / 55. 47.100
    
  libavformat    55. 22.102 / 55. 22.102
    
  libavdevice    55.  5.102 / 55.  5.102
    
  libavfilter     4.  0.103 /  4.  0.103
    
  libswscale      2.  5.101 /  2.  5.101
    
  libswresample   0. 17.104 /  0. 17.104
    
  libpostproc    52.  3.100 / 52.  3.100
    
[avi @ 0000000002858060] non-interleaved AVI
    
Guessed Channel Layout for  Input Stream #0.1 : mono
    
Input #0, avi, from 'H:\_REC\100MEDIA\someavi.AVI':
    
  Duration: 00:19:59.95, start: 0.000000, bitrate: 13866 kb/s
    
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj420p(pc), 1920x1080, 30 t
    
br, 30 tbn, 30 tbc
    
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 8000 Hz, mono, s16, 1
    
28 kb/s
    
File 'H:\_REC\100MEDIA\somemp4.mp4' already exists.
    
Overwrite ? [y/N] y
    
No pixel format specified, yuvj420p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 00000000049f2980] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    
AVX
    
[libx264 @ 00000000049f2980] profile High, level 4.0
    
[libx264 @ 00000000049f2980] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC cod
    
ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 r
    
ef=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_pski
    
p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
    
imate=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 'H:\_REC\100MEDIA\somemp4.mp4':
    
  Metadata:
    
    encoder         : Lavf55.22.102
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p, 1920x
    
1080, q=-1--1, 1000k tbn, 30 tbc
    
    Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 8000 Hz, mo
    
no, s16, 128 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mjpeg -> libx264)
    
  Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
frame=   30 fps=0.0 q=0.0 size=       0kB time=00:00:00.82 bitrate=   0.5kbits/s
    
frame=   55 fps= 54 q=0.0 size=       0kB time=00:00:01.59 bitrate=   0.2kbits/s
    
frame=   75 fps= 46 q=29.0 size=     600kB time=00:00:02.10 bitrate=2337.0kbits/
    
frame=   90 fps= 41 q=29.0 size=    1017kB time=00:00:02.61 bitrate=3185.9kbits/
    
frame=  105 fps= 37 q=29.0 size=    1482kB time=00:00:03.12 bitrate=3881.8kbits/
    
frame=  120 fps= 35 q=29.0 size=    1959kB time=00:00:03.76 bitrate=4258.3kbits/
    
frame=  140 fps= 35 q=29.0 size=    2588kB time=00:00:04.28 bitrate=4953.2kbits/
    
frame=  145 fps= 32 q=29.0 size=    2742kB time=00:00:04.66 bitrate=4816.0kbits/
    
frame=  162 fps= 32 q=29.0 size=    3274kB time=00:00:05.17 bitrate=5181.6kbits/
    
frame=  177 fps= 32 q=29.0 size=    3744kB time=00:00:05.56 bitrate=5515.8kbits/
    
frame=  190 fps= 31 q=29.0 size=    4144kB time=00:00:06.07 bitrate=5591.5kbits/
    
frame=  205 fps= 31 q=29.0 size=    4612kB time=00:00:06.45 bitrate=5851.7kbits/
    
frame=  215 fps= 30 q=29.0 size=    4895kB time=00:00:06.96 bitrate=5754.9kbits/
    
frame=  227 fps= 30 q=29.0 size=    5169kB time=00:00:07.35 bitrate=5759.4kbits/
    
frame=  245 fps= 30 q=29.0 size=    5571kB time=00:00:07.99 bitrate=5710.1kbits/
    
frame=  262 fps= 30 q=29.0 size=    6052kB time=00:00:08.50 bitrate=5830.4kbits/
    
frame=  280 fps= 30 q=29.0 size=    6505kB time=00:00:09.14 bitrate=5827.4kbits/
    
frame=  300 fps= 30 q=29.0 size=    7048kB time=00:00:09.65 bitrate=5979.4kbits/
    
frame=  305 fps= 29 q=29.0 size=    7175kB time=00:00:09.91 bitrate=5930.2kbits/
    
frame=  322 fps= 29 q=29.0 size=    7675kB time=00:00:10.55 bitrate=5958.3kbits/
    
frame=  342 fps= 29 q=29.0 size=    8237kB time=00:00:11.06 bitrate=6098.9kbits/
    
frame=  357 fps= 29 q=29.0 size=    8661kB time=00:00:11.70 bitrate=6062.0kbits/
    
frame=  369 fps= 29 q=29.0 size=    9010kB time=00:00:12.08 bitrate=6105.8kbits/
    
frame=  387 fps= 29 q=29.0 size=    9501kB time=00:00:12.72 bitrate=6115.2kbits/
    
frame=  407 fps= 29 q=29.0 size=   10052kB time=00:00:13.24 bitrate=6219.2kbits/
    
frame=  414 fps= 29 q=29.0 size=   10257kB time=00:00:13.62 bitrate=6167.7kbits/
    
frame=  421 fps= 26 q=-1.0 Lsize=   12062kB time=00:00:14.00 bitrate=7053.8kbits
    
/s dup=253 drop=0
    
video:12036kB audio:19kB subtitle:0 global headers:0kB muxing overhead 0.054462%
    

    
[libx264 @ 00000000049f2980] frame I:2     Avg QP:21.20  size:106302
    
[libx264 @ 00000000049f2980] frame P:336   Avg QP:23.51  size: 36006
    
[libx264 @ 00000000049f2980] frame B:83    Avg QP:23.96  size:   169
    
[libx264 @ 00000000049f2980] consecutive B-frames: 60.6% 39.4%  0.0%  0.0%
    
[libx264 @ 00000000049f2980] mb I  I16..4:  2.0% 96.2%  1.8%
    
[libx264 @ 00000000049f2980] mb P  I16..4:  0.6% 31.1%  0.1%  P16..4: 13.6%  3.3
    
%  1.4%  0.0%  0.0%    skip:49.8%
    
[libx264 @ 00000000049f2980] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.3%  0.0
    
%  0.0%  direct: 0.0%  skip:98.7%  L0: 1.5% L1:98.5% BI: 0.0%
    
[libx264 @ 00000000049f2980] 8x8 transform intra:97.7% inter:79.3%
    
[libx264 @ 00000000049f2980] coded y,uvDC,uvAC intra: 86.0% 87.6% 8.9% inter: 9.
    
3% 15.7% 1.4%
    
[libx264 @ 00000000049f2980] i16 v,h,dc,p:  7%  7%  6% 80%
    
[libx264 @ 00000000049f2980] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 14% 54%  3%  3%
    
 2%  3%  3%  3%
    
[libx264 @ 00000000049f2980] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 12% 14%  6% 21%
    
 5% 19%  5%  4%
    
[libx264 @ 00000000049f2980] i8c dc,h,v,p: 47% 24% 25%  3%
    
[libx264 @ 00000000049f2980] Weighted P-Frames: Y:3.6% UV:3.0%
    
[libx264 @ 00000000049f2980] ref P L0: 57.9% 15.5%  9.5% 16.4%  0.7%
    
[libx264 @ 00000000049f2980] ref B L0: 34.6% 65.4%
    
[libx264 @ 00000000049f2980] kb/s:7025.99

  • WebM file not seekable in Chrome, when generated with ffmpeg

    11 avril 2014, par Zoon

    I am having a mind-boggling problem, I just can't seem to resolve.

    Providing a WebM file through PHP is nothing new in my world, and I even know how to work with HTTP 206 Partial Content. But for some reason Chrome does not like it.

    A simple HTML5 video playback

    <video width="640" height="360" poster="picture/preview/V00000006.jpg" controls="controls" preload="preload">
    
    <source type="video/webm" src="/video/V00000006.webm">
    
</source></video>

    where /video/V00000006.webm is rewritten to a PHP-file in Apache, will playback just fine.
    But in Chrome the seekbar is not effective. When clicking on the seekbar the player will freeze and no longer playback until page is refreshed. Firefox handles it just fine !

    If I change /video/V00000006.webm to be a direct link to the same video it works just fine. I even compared the network requests between the two versions (with and without PHP) and there is barely any difference in the first request, but the second is failing in the PHP-delivered video.

    Initial request and seek request for Apache-delivered video file :

        Request URL :http://mytestserver.net/movie1152x720.webm
    Request Method:GET
    Status Code:206 Partial Content
    Request Headers
    Accept :*/*
    Accept-Encoding:identity ;q=1, * ;q=0
    Accept-Language:da-DK,da ;q=0.8,en-US ;q=0.6,en ;q=0.4
    Cache-Control:no-cache
    Connection:keep-alive
    Cookie:PHPSESSID=i562540rek172mnv3nk528acj0 ; userPassword= ; userEmail=
    Host:mytestserver.net
    Pragma:no-cache
    Range:bytes=0-
    Referer :http://mytestserver.net/video.html
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
    Response Headers
    Accept-Ranges:bytes
    Connection:close
    Content-Length:4446451
    Content-Range:bytes 0-4446450/4446451
    Content-Type:video/webm
    Date:Fri, 11 Apr 2014 13:07:30 GMT
    ETag :"d2d0027-43d8f3-b91417c0"
    Last-Modified:Fri, 11 Apr 2014 12:46:31 GMT
    Server:Apache/2.2.3 (CentOS)

        —
    

        Request URL :http://mytestserver.net/movie1152x720.webm
    
    Request Method:GET
    
    Status Code:206 Partial Content
    
    Request Headers
    
    Accept :*/*
    
    Accept-Encoding:identity ;q=1, * ;q=0
    
    Accept-Language:da-DK,da ;q=0.8,en-US ;q=0.6,en ;q=0.4
    
    Cache-Control:no-cache
    
    Connection:keep-alive
    
    Cookie:PHPSESSID=i562540rek172mnv3nk528acj0 ; userPassword= ; userEmail=
    
    Host:mytestserver.net
    
    Pragma:no-cache
    
    Range:bytes=4445881-
    
    Referer :http://mytestserver.net/video.html
    
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
    
    Response Headers
    
    Accept-Ranges:bytes
    
    Connection:close
    
    Content-Length:570
    
    Content-Range:bytes 4445881-4446450/4446451
    
    Content-Type:video/webm
    
    Date:Fri, 11 Apr 2014 13:09:02 GMT
    
    ETag :"d2d0027-43d8f3-b91417c0"
    
    Last-Modified:Fri, 11 Apr 2014 12:46:31 GMT
    
    Server:Apache/2.2.3 (CentOS)

    Initial request and seek request for PHP-streamed video :

        Request URL :http://mytestserver.net/video/V00000006.webm
    Request Method:GET
    Status Code:206 Partial Content
    Request Headers
    Accept :*/*
    Accept-Encoding:identity ;q=1, * ;q=0
    Accept-Language:da-DK,da ;q=0.8,en-US ;q=0.6,en ;q=0.4
    Cache-Control:no-cache
    Connection:keep-alive
    Cookie:PHPSESSID=i562540rek172mnv3nk528acj0 ; userPassword= ; userEmail=
    Host:mytestserver.net
    Pragma:no-cache
    Range:bytes=0-
    Referer :http://mytestserver.net/video.html
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
    Response Headers
    Accept-Ranges:bytes
    Cache-Control:no-store, no-cache, must-revalidate, post-check=0, pre-check=0
    Connection:close
    Content-Length:8566268
    Content-Range:bytes 0-8566267/8566268
    Content-Type:video/webm
    Date:Fri, 11 Apr 2014 13:31:27 GMT
    Expires:Thu, 19 Nov 1981 08:52:00 GMT
    Pragma:no-cache
    Server:Apache/2.2.3 (CentOS)
    X-Powered-By:PHP/5.3.27

        —
    

        Request URL :http://mytestserver.net/video/V00000006.webm
    
    Request Headers CAUTION : Provisional headers are shown.
    
    Accept-Encoding:identity ;q=1, * ;q=0
    
    Cache-Control:no-cache
    
    Pragma:no-cache
    
    Range:bytes=4338314-
    
    Referer :http://mytestserver.net/video.html
    
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36

    Notice how the second request does not complete, Provisional headers are shown.

    I have tried altering the cache headers, setting it to the future, setting them blank and using file attachment headers.

    I tried fiddling around a lot with the serving code, but lately I have ended up with a simple example.

    &lt;?php
    

    
$path = &#39;test.webm&#39;;
    

    
$size=filesize($path);
    

    
$fm=@fopen($path,&#39;rb&#39;);
    
if(!$fm) {
    
  header ("HTTP/1.0 404 Not Found");
    
  die();
    
}
    

    
$begin=0;
    
$end = $size-1;
    

    
if(isset($_SERVER[&#39;HTTP_RANGE&#39;])) {
    
  if(preg_match(&#39;/bytes=\h*(\d+)-(\d*)[\D.*]?/i&#39;, $_SERVER[&#39;HTTP_RANGE&#39;], $matches)) {
    
    $begin=intval($matches[0]);
    
    if(!empty($matches[1])) {
    
      $end=intval($matches[1]);
    
    }
    
  }
    
}
    

    
if($begin>0||$end&lt;$size)
    
  header(&#39;HTTP/1.0 206 Partial Content&#39;);
    
else
    
  header(&#39;HTTP/1.0 200 OK&#39;);
    

    
header("Content-Type: video/webm");
    
header(&#39;Accept-Ranges: bytes&#39;);
    
header(&#39;Content-Length:&#39;.($end-$begin+1));
    
header("Content-Disposition: inline;");
    
header("Content-Range: bytes $begin-$end/$size");
    
header("Content-Transfer-Encoding: binary\n");
    
header(&#39;Connection: close&#39;);
    

    
ob_get_clean();
    
flush();
    

    
$f = fopen($path, &#39;r&#39;);
    
fseek($f, $offset);
    

    
$pos = 0;
    
$length = $end-$begin;
    

    
while($pos &lt; $length)
    
{
    
    $chunk = min($length-$pos, 1024);
    

    
    echo fread($f, $chunk);
    
    flush();
    

    
    $pos += $chunk;
    
}
    
?>

    Please note, entering the PHP-delivered video URL directly into the browser does not make a difference from showing it in a HTML page.

    I hope someone has an answer to why seeking might not work. Let me know if you have any suggestions.

    Thanks !

Navigation