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Médias (3)
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MediaSPIP Simple : futur thème graphique par défaut ?
26 septembre 2013, par
Mis à jour : Octobre 2013
Langue : français
Type : Video
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GetID3 - Bloc informations de fichiers
9 avril 2013, par
Mis à jour : Mai 2013
Langue : français
Type : Image
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GetID3 - Boutons supplémentaires
9 avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
Autres articles (101)
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25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
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Emballe Médias : Mettre en ligne simplement des documents
29 octobre 2010, parLe plugin emballe médias a été développé principalement pour la distribution mediaSPIP mais est également utilisé dans d’autres projets proches comme géodiversité par exemple. Plugins nécessaires et compatibles
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Sur d’autres sites (13246)
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Remuxing mp4 and change resolution with ffmpeg programmatically
9 janvier 2015, par arielI have a remuxing.c example working from ffmpeg but I need to change resolution to minimize file size, anybody can explain me how to do that ? Or if there is another way to "compress" mp4 files without command line ? I’m a begginer with FFmpeg and need to send video files from android to server, and I’m deploying a NDK library to make this job because FFmpeg command-line implementation have some limitations and is very slow.
Thanks
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What causes Firefox to refuse playing one specific MP4 that plays well on other browsers, resolution being the only difference ?
3 décembre 2014, par FaroI’m a developer for a PHP powered website that allows the upload of videos which get converted to MP4 using ffmpeg. This setup worked pretty well so far, however today I came across a report of a user that couldn’t play one of the files in Firefox.
I was unable to replicate the issue on my own machine at first, but using a fresh install of Windows 7 I actually got the same issue : The file will not play in Firefox, but works fine in Chrome. If called up directly, Firefox will say "Video can’t be played because the file is corrupt".
When downloaded, Windows will also not create a thumbnail of the video for the file and WMP will only play the audio part.On my own machine the file works perfectly in WMP which made me wonder if it could be a codec issue (I do have the K-Lite Codec Pack installed), however I’ve compared the file to a working one and the only difference is the resolution, filesize and the format profile which is "High@L3.1" for a working file with a 720p resolution and "High@L4.0" for the non-working one (which is 1600x1200).
I then read through the Wikipedia article on H.264/MPEG-4 AVC and began to wonder if the level might be the issue, and the tool I used (XMedia Recode) actually did not allow me to set a height bigger than 1080 on Level 4, however when I set the level to 5 and encoded the file again, it still wouldn’t play.
I did find a note on the MDN page of supported formats which reads :
Firefox/Firefox for Android/Firefox OS supports the format in some cases, but only when a third-party decoder is available, and the device hardware can handle the profile used to encode the MP4.
I’m assuming that is why the codec pack would allow Firefox to play even the ’broken’ file on my machine, I still don’t understand though why Firefox does play some files but not this one, especially when Chrome on the same machine plays all of them.
The line in PHP that starts the conversion is as follows :
exec("/usr/local/bin/ffmpeg '-i' '" . $file_in . "' '-qscale' '4' '-y' '-threads' '1' '-acodec' 'libvo_aacenc' '-vcodec' 'h264' '" . $file_out . "' 2>&1", $buffer, $success);
This should produce correct files, and this is indeed the first time a file has issues.
MediaInfo provides this data for the file stream :
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 12mn 26s
Bit rate : 77.7 Kbps
Width : 1 600 pixels
Height : 1 200 pixels
Display aspect ratio : 4:3
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) : 0.001
Stream size : 6.92 MiB (36%)
Writing library : x264 core 142 r14 956c8d8
Encoding settings : 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=1 / 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
Language : English
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 12mn 26s
Duration_LastFrame : -10ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 11.4 MiB (60%)
Language : EnglishI’ve uploaded a zip with 3 versions of the file, the untouched one, the converted one with the same settings the website would use, and another converted one with level 5.
Maybe I’m missing something obvious, but I couldn’t find anything wrong with it, what do I need to change in order to produce a file that will work natively in Firefox ?
Also, this is my first question on SO, so if you see anything that I can improve, please let me know :-)
Edit : This is the output of calling ffmpeg (with the faststart option)
/usr/local/bin/ffmpeg '-i' '49cf594e91d0dac376aa0b2b96972ded.mp4' '-movflags' '+faststart' '-qscale' '4' '-y' '-threads' '1' '-acodec' 'libvo_aacenc' '-vcodec' 'h264' 'test.mp4'
ffmpeg version 1.2.5- http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 22 2014 20:28:02 with gcc 4.8 (Debian 4.8.2-14)
configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --disable-ffserver
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '49cf594e91d0dac376aa0b2b96972ded.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.63.104
Duration: 00:12:26.37, start: 0.036281, bitrate: 214 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1600x1200 [SAR 1:1 DAR 4:3], 77 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
handler_name : SoundHandler
Please use -q:a or -q:v, -qscale is ambiguous
[libx264 @ 0x2802ac0] using SAR=1/1
[libx264 @ 0x2802ac0] using cpu capabilities: MMX2 SSE2Fast LZCNT
[libx264 @ 0x2802ac0] profile High, level 4.0
[libx264 @ 0x2802ac0] 264 - core 142 r14 956c8d8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=1 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 : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.63.104
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1600x1200 [SAR 1:1 DAR 4:3], q=-1--1, 15360 tbn, 30 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
Press [q] to stop, [?] for help
Starting second pass: moving header on top of the file30.77 bitrate= 202.5kbits/s dup=1 drop=0
frame=15331 fps= 13 q=29.0 Lsize= 13201kB time=00:08:31.03 bitrate= 211.6kbits/s dup=1 drop=0
video:4673kB audio:7986kB subtitle:0 global headers:0kB muxing overhead 4.286767%
[libx264 @ 0x2802ac0] frame I:63 Avg QP:12.37 size: 39759
[libx264 @ 0x2802ac0] frame P:3905 Avg QP:20.36 size: 313
[libx264 @ 0x2802ac0] frame B:11363 Avg QP:33.67 size: 93
[libx264 @ 0x2802ac0] consecutive B-frames: 1.1% 0.1% 0.2% 98.6%
[libx264 @ 0x2802ac0] mb I I16..4: 48.0% 41.5% 10.5%
[libx264 @ 0x2802ac0] mb P I16..4: 0.1% 0.2% 0.0% P16..4: 0.5% 0.0% 0.0% 0.0% 0.0% skip:99.1%
[libx264 @ 0x2802ac0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.3% 0.0% 0.0% direct: 0.0% skip:99.7% L0:50.2% L1:48.9% BI: 0.8%
[libx264 @ 0x2802ac0] 8x8 transform intra:42.4% inter:36.9%
[libx264 @ 0x2802ac0] coded y,uvDC,uvAC intra: 6.9% 13.4% 9.4% inter: 0.0% 0.1% 0.0%
[libx264 @ 0x2802ac0] i16 v,h,dc,p: 82% 17% 1% 0%
[libx264 @ 0x2802ac0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 20% 49% 0% 0% 0% 0% 0% 0%
[libx264 @ 0x2802ac0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 41% 20% 18% 3% 4% 4% 4% 4% 3%
[libx264 @ 0x2802ac0] i8c dc,h,v,p: 80% 12% 7% 1%
[libx264 @ 0x2802ac0] Weighted P-Frames: Y:0.3% UV:0.3%
[libx264 @ 0x2802ac0] ref P L0: 74.7% 3.8% 10.6% 10.9% 0.0%
[libx264 @ 0x2802ac0] ref B L0: 70.3% 28.9% 0.8%
[libx264 @ 0x2802ac0] ref B L1: 97.9% 2.1%
[libx264 @ 0x2802ac0] kb/s:74.90 -
ffmpeg stream file to crtmp - How to change the resolution ?
29 novembre 2014, par MartinI’m using ffmpeg - streaming local file to crtmpserver (or other server) :
ffmpeg.exe -re -i file.avi -vcodec libx264 -preset veryfast -acodec aac -strict experimental -f flv rtmp://256.257.0.0:1935/flvplayback/live
How to change the resolution ? File has a resolution
1920x1080
, but I want to send only640x360
.-s 640x360
does not work.