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ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
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Les sons
15 mai 2013, par -
Soumettre bugs et patchs
10 avril 2011Un logiciel n’est malheureusement jamais parfait...
Si vous pensez avoir mis la main sur un bug, reportez le dans notre système de tickets en prenant bien soin de nous remonter certaines informations pertinentes : le type de navigateur et sa version exacte avec lequel vous avez l’anomalie ; une explication la plus précise possible du problème rencontré ; si possibles les étapes pour reproduire le problème ; un lien vers le site / la page en question ;
Si vous pensez avoir résolu vous même le bug (...)
Sur d’autres sites (9389)
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Streaming without Content-Length in response
29 août 2011, par kainI'm using Node.js, Express (and connect), and fluent-ffmpeg.
We want to stream audio files that are stored on Amazon S3 through http.
We have all working, except that we would like to add a feature, the on-the-fly conversion of the stream through ffmpeg.
This is working well, the problem is that some browsers checks in advance before actually getting the file.
Incoming requests containing the Range header, for which we reply with a 206 with all the info from S3, have a fundamental problem : we need to know in advance the content-length of the file.
We don't know that since it is going through ffmpeg.
One solution might be to write out the resulting content-length directly on S3 when storing the file (in a special header), but this means we have to go through the pain of having queues to encode after upload just to know the size for future requests.
It also means that if we change compressor or preset we have to go through all this over again, so it is not a viable solution.We also noticed big differencies in the way Chrome and Safari request the audio tag src, but this may be discussion for another topic.
Fact is that without a proper content-length header in response everything seems to break or browsers goes in an infinite loop or restart the stream at pleasure.
Ideas ?
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ffmpeg error when using non root user
29 août 2014, par mkernI have installed ffmpeg and it works perfect if you are root or using sudo but it errors out when trying to use it as a non-root user. I have performed the same install on a test VPS and it installs without issue so it appears to be isolated to this cPanel server. I haven’t been able to identify why.
Non-Root :
> ffmpeg -v debug -i 1.mov 1.avi ffmpeg version N-65949-g0ddb051
> Copyright (c) 2000-2014 the FFmpeg developers built on Aug 28 2014
> 11:39:47 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
> configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis
> --enable-libvpx --enable-libx264 libavutil 54. 7.100 / 54. 7.100 libavcodec 56. 0.101 / 56. 0.101 libavformat 56. 3.100 / 56. 3.100 libavdevice 56. 0.100 / 56. 0.100 libavfilter 5. 0.103 / 5. 0.103 libswscale 3. 0.100 /
> 3. 0.100 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 0.100 / 53. 0.100 Splitting the commandline. Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
> Reading option '-i' ... matched as input file with argument '1.mov'.
> Reading option '1.avi' ... matched as output file. Finished splitting
> the commandline. Parsing a group of options: global . Applying option
> v (set logging level) with argument debug. Successfully parsed a group
> of options. Parsing a group of options: input file 1.mov. Successfully
> parsed a group of options. Opening an input file: 1.mov.
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x348fc20] Format mov,mp4,m4a,3gp,3g2,mj2
> probed with size=2048 and score=100 [mov,mp4,m4a,3gp,3g2,mj2 @
> 0x348fc20] ISO: File Type Major Brand: qt [mov,mp4,m4a,3gp,3g2,mj2 @
> 0x348fc20] Before avformat_find_stream_info() pos: 698348 bytes
> read:39602 seeks:1 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x348fc20] All info
> found [mov,mp4,m4a,3gp,3g2,mj2 @ 0x348fc20] After
> avformat_find_stream_info() pos: 169190 bytes read:2333362 seeks:67
> frames:148 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
> Metadata:
> major_brand : qt
> minor_version : 0
> compatible_brands: qt
> creation_time : 2014-06-05 04:40:27
> model : iPhone 5
> model-eng : iPhone 5
> encoder : 7.1.1
> encoder-eng : 7.1.1
> date : 2014-06-04T21:40:27-0700
> date-eng : 2014-06-04T21:40:27-0700
> make : Apple
> make-eng : Apple Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
> Stream #0:0(und), 41, 1/600: Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 1/1200, 710 kb/s, 29.09
> fps, 600 tbr, 600 tbn, 1200 tbc (default)
> Metadata:
> rotate : 90
> creation_time : 2014-06-05 04:40:27
> handler_name : Core Media Data Handler
> encoder : H.264
> Side data:
> displaymatrix: rotation of -90.00 degrees
> Stream #0:1(und), 107, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
> Metadata:
> creation_time : 2014-06-05 04:40:27
> handler_name : Core Media Data Handler Successfully opened the file. Parsing a group of options: output file 1.avi. Successfully
> parsed a group of options. Opening an output file: 1.avi. Successfully
> opened the file. detected 24 logical cores [graph 0 input from stream
> 0:0 @ 0x34aa3a0] Setting 'video_size' to value '480x360' [graph 0
> input from stream 0:0 @ 0x34aa3a0] Setting 'pix_fmt' to value '0'
> [graph 0 input from stream 0:0 @ 0x34aa3a0] Setting 'time_base' to
> value '1/600' [graph 0 input from stream 0:0 @ 0x34aa3a0] Setting
> 'pixel_aspect' to value '0/1' [graph 0 input from stream 0:0 @
> 0x34aa3a0] Setting 'sws_param' to value 'flags=2' [graph 0 input from
> stream 0:0 @ 0x34aa3a0] Setting 'frame_rate' to value '320/11' [graph
> 0 input from stream 0:0 @ 0x34aa3a0] w:480 h:360 pixfmt:yuv420p
> tb:1/600 fr:320/11 sar:0/1 sws_param:flags=2 [format @ 0x3496b00]
> compat: called with args=[yuv420p] [format @ 0x3496b00] Setting
> 'pix_fmts' to value 'yuv420p' [AVFilterGraph @ 0x348f320]
> query_formats: 4 queried, 3 merged, 0 already done, 0 delayed
> [AVFilterGraph @ 0x34bbe60] Error initializing threading.
> [AVFilterGraph @ 0x34bbe60] Error creating filter 'anull' Error
> opening filters! [AVIOContext @ 0x34967c0] Statistics: 0 seeks, 0
> writeouts [AVIOContext @ 0x348f1e0] Statistics: 2333362 bytes read, 67
> seeks[AVFilterGraph @ 0x34bbe60] Error initializing threading.
[AVFilterGraph @ 0x34bbe60] Error creating filter ’anull’ Error
opening filters !As ROOT :
ffmpeg -v verbose -i 1.mov 1.avi
ffmpeg version N-65949-g0ddb051 Copyright (c) 2000-2014 the FFmpeg developers
built on Aug 28 2014 11:39:47 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 3.100 / 56. 3.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.103 / 5. 0.103
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2014-06-05 04:40:27
model : iPhone 5
model-eng : iPhone 5
encoder : 7.1.1
encoder-eng : 7.1.1
date : 2014-06-04T21:40:27-0700
date-eng : 2014-06-04T21:40:27-0700
make : Apple
make-eng : Apple
Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 710 kb/s, 29.09 fps, 600 tbr, 600 tbn, 1200 tbc (default)
Metadata:
rotate : 90
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : H.264
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
[graph 0 input from stream 0:0 @ 0x27ed3a0] w:480 h:360 pixfmt:yuv420p tb:1/600 fr:320/11 sar:0/1 sws_param:flags=2
[graph 1 input from stream 0:1 @ 0x2800700] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x4
Output #0, avi, to '1.avi':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
make-eng : Apple
model : iPhone 5
model-eng : iPhone 5
make : Apple
ISFT : Lavf56.3.100
ICRD : 2014-06-04T21:40:27-0700
date-eng : 2014-06-04T21:40:27-0700
Stream #0:0(und): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 480x360, q=2-31, 200 kb/s, 29.09 fps, 29.09 tbn, 29.09 tbc (default)
Metadata:
rotate : 90
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : Lavc56.0.101 mpeg4
Stream #0:1(und): Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz, mono, fltp (default)
Metadata:
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : Lavc56.0.101 libmp3lame
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
*** dropping frame 79 from stream 0 at ts 80
*** dropping frame 113 from stream 0 at ts 114
*** dropping frame 145 from stream 0 at ts 146
*** dropping frame 177 from stream 0 at ts 178
No more output streams to write to, finishing.
frame= 204 fps=0.0 q=27.2 Lsize= 348kB time=00:00:07.15 bitrate= 398.4kbits/s dup=0 drop=4
video:271kB audio:56kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.560985%
Input file #0 (1.mov):
Input stream #0:0 (video): 208 packets read (634624 bytes); 208 frames decoded;
Input stream #0:1 (audio): 308 packets read (56854 bytes); 308 frames decoded (315392 samples);
Total: 516 packets (691478 bytes) demuxed
Output file #0 (1.avi):
Output stream #0:0 (video): 204 frames encoded; 204 packets muxed (276993 bytes);
Output stream #0:1 (audio): 274 frames encoded (315392 samples); 275 packets muxed (57469 bytes);
Total: 479 packets (334462 bytes) muxedstrace and strace -e outputs :
strace non root :579 clone(child_stack=0x7fd3bfd07ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fd3bfd089d0, tls=0x7fd3bfd08700, child_tidptr=0x7fd3bfd089d0) = 3 2637
580 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fd3bed07000
581 mprotect(0x7fd3bed07000, 4096, PROT_NONE) = 0
582 clone(child_stack=0x7fd3bf506ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fd3bf5079d0, tls=0x7fd3bf507700, child_tidptr=0x7fd3bf5079d0) = - 1 EAGAIN (Resource temporarily unavailable)
583 futex(0x253b420, FUTEX_WAKE_PRIVATE, 1) = 1
584 futex(0x253b3f4, FUTEX_CMP_REQUEUE_PRIVATE, 1, 2147483647, 0x253b420, 4) = 2
585 futex(0x253b420, FUTEX_WAKE_PRIVATE, 1) = 1
586 futex(0x7fd3c2d0e9d0, FUTEX_WAIT, 32631, NULL) = 0
587 munmap(0x7fd3bed07000, 8392704) = 0
588 munmap(0x7fd3c250e000, 8392704) = 0
589 munmap(0x7fd3c1d0d000, 8392704) = 0
590 munmap(0x7fd3c150c000, 8392704) = 0
591 write(2, "\33[1;32m[AVFilterGraph @ 0x253b0a"..., 39[AVFilterGraph @ 0x253b0a0] ) = 39
592 write(2, "\33[1;31mError initializing thread"..., 41Error initializing threading.
593 ) = 41
594 write(2, "\33[1;32m[AVFilterGraph @ 0x253b0a"..., 39[AVFilterGraph @ 0x253b0a0] ) = 39
595 write(2, "\33[1;31mError creating filter 'an"..., 41Error creating filter 'anull'
596 ) = 41
597 write(2, "\33[4;31mError opening filters!\n\33["..., 34Error opening filters!
598 ) = 34strace -e non root :
strace -e open ffmpeg -i 1.mov 5.avi
open("/etc/ld.so.cache", O_RDONLY) = 3
open("/lib64/libasound.so.2", O_RDONLY) = 3
open("/usr/lib64/libSDL-1.2.so.0", O_RDONLY) = 3
open("/lib64/libpthread.so.0", O_RDONLY) = 3
open("/usr/lib64/libx264.so.142", O_RDONLY) = 3
open("/usr/lib64/libvpx.so.0", O_RDONLY) = 3
open("/usr/local/lib/libvorbisenc.so.2", O_RDONLY) = 3
open("/usr/local/lib/libvorbis.so.0", O_RDONLY) = 3
open("/usr/local/lib/libmp3lame.so.0", O_RDONLY) = 3
open("/lib64/libm.so.6", O_RDONLY) = 3
open("/lib64/libbz2.so.1", O_RDONLY) = 3
open("/usr/local/lib/libz.so.1", O_RDONLY) = 3
open("/lib64/librt.so.1", O_RDONLY) = 3
open("/lib64/libc.so.6", O_RDONLY) = 3
open("/lib64/libdl.so.2", O_RDONLY) = 3
open("/usr/local/lib/libogg.so.0", O_RDONLY) = 3
ffmpeg version N-65949-g0ddb051 Copyright (c) 2000-2014 the FFmpeg developers
built on Aug 28 2014 11:39:47 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 3.100 / 56. 3.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.103 / 5. 0.103
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
open("1.mov", O_RDONLY|O_CLOEXEC) = 3
open("/etc/localtime", O_RDONLY) = 4
open("/proc/meminfo", O_RDONLY|O_CLOEXEC) = 4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2014-06-05 04:40:27
model : iPhone 5
model-eng : iPhone 5
encoder : 7.1.1
encoder-eng : 7.1.1
date : 2014-06-04T21:40:27-0700
date-eng : 2014-06-04T21:40:27-0700
make : Apple
make-eng : Apple
Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 710 kb/s, 29.09 fps, 600 tbr, 600 tbn, 1200 tbc (default)
Metadata:
rotate : 90
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : H.264
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
open("5.avi", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 4
[AVFilterGraph @ 0x26ff4a0] Error initializing threading.
[AVFilterGraph @ 0x26ff4a0] Error creating filter 'anull'
Error opening filters!strace root :
579 clone(child_stack=0x7f4eb7c34ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb7c359d0, tls=0x7f4eb7c35700, child_tidptr=0x7f4eb7c359d0) = 3 383
580 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb6c34000
581 mprotect(0x7f4eb6c34000, 4096, PROT_NONE) = 0
582 clone(child_stack=0x7f4eb7433ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb74349d0, tls=0x7f4eb7434700, child_tidptr=0x7f4eb74349d0) = 3 384
583 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb6433000
584 mprotect(0x7f4eb6433000, 4096, PROT_NONE) = 0
585 clone(child_stack=0x7f4eb6c32ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb6c339d0, tls=0x7f4eb6c33700, child_tidptr=0x7f4eb6c339d0) = 3 385
586 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb5c32000
587 mprotect(0x7f4eb5c32000, 4096, PROT_NONE) = 0
588 clone(child_stack=0x7f4eb6431ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb64329d0, tls=0x7f4eb6432700, child_tidptr=0x7f4eb64329d0) = 3 386
589 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb5431000
590 mprotect(0x7f4eb5431000, 4096, PROT_NONE) = 0
591 clone(child_stack=0x7f4eb5c30ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb5c319d0, tls=0x7f4eb5c31700, child_tidptr=0x7f4eb5c319d0) = 3 387
592 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb4c30000
593 mprotect(0x7f4eb4c30000, 4096, PROT_NONE) = 0
594 clone(child_stack=0x7f4eb542fff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb54309d0, tls=0x7f4eb5430700, child_tidptr=0x7f4eb54309d0) = 3 388
595 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb442f000
596 mprotect(0x7f4eb442f000, 4096, PROT_NONE) = 0
597 clone(child_stack=0x7f4eb4c2eff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS| CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb4c2f9d0, tls=0x7f4eb4c2f700, child_tidptr=0x7f4eb4c2f9d0) = 3 389
598 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb3c2e000strace -e root :
strace -e open ffmpeg -i 1.mov 5.avi
open("/etc/ld.so.cache", O_RDONLY) = 3
open("/lib64/libasound.so.2", O_RDONLY) = 3
open("/usr/lib64/libSDL-1.2.so.0", O_RDONLY) = 3
open("/lib64/libpthread.so.0", O_RDONLY) = 3
open("/usr/lib64/libx264.so.142", O_RDONLY) = 3
open("/usr/lib64/libvpx.so.0", O_RDONLY) = 3
open("/usr/local/lib/libvorbisenc.so.2", O_RDONLY) = 3
open("/usr/local/lib/libvorbis.so.0", O_RDONLY) = 3
open("/usr/local/lib/libmp3lame.so.0", O_RDONLY) = 3
open("/lib64/libm.so.6", O_RDONLY) = 3
open("/lib64/libbz2.so.1", O_RDONLY) = 3
open("/usr/local/lib/libz.so.1", O_RDONLY) = 3
open("/lib64/librt.so.1", O_RDONLY) = 3
open("/lib64/libc.so.6", O_RDONLY) = 3
open("/lib64/libdl.so.2", O_RDONLY) = 3
open("/usr/local/lib/libogg.so.0", O_RDONLY) = 3
ffmpeg version N-65957-gc6a3b00 Copyright (c) 2000-2014 the FFmpeg developers
built on Aug 28 2014 13:37:32 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264 --prefix=/usr --libdir=/usr/lib64 --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 3.100 / 56. 3.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.103 / 5. 0.103
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
open("1.mov", O_RDONLY|O_CLOEXEC) = 3
open("/etc/localtime", O_RDONLY) = 4
open("/proc/meminfo", O_RDONLY|O_CLOEXEC) = 4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2014-06-05 04:40:27
model : iPhone 5
model-eng : iPhone 5
encoder : 7.1.1
encoder-eng : 7.1.1
date : 2014-06-04T21:40:27-0700
date-eng : 2014-06-04T21:40:27-0700
make : Apple
make-eng : Apple
Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 710 kb/s, 29.09 fps, 600 tbr, 600 tbn, 1200 tbc (default)
Metadata:
rotate : 90
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : H.264
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
File '5.avi' already exists. Overwrite ? [y/N] y
open("5.avi", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 4
Output #0, avi, to '5.avi':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
make-eng : Apple
model : iPhone 5
model-eng : iPhone 5
make : Apple
ISFT : Lavf56.3.100
ICRD : 2014-06-04T21:40:27-0700
date-eng : 2014-06-04T21:40:27-0700
Stream #0:0(und): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 480x360, q=2-31, 200 kb/s, 29.09 fps, 29.09 tbn, 29.09 tbc (default)
Metadata:
rotate : 90
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : Lavc56.0.101 mpeg4
Stream #0:1(und): Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz, mono, fltp (default)
Metadata:
creation_time : 2014-06-05 04:40:27
handler_name : Core Media Data Handler
encoder : Lavc56.0.101 libmp3lame
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
frame= 204 fps=0.0 q=27.2 Lsize= 348kB time=00:00:07.15 bitrate= 398.4kbits/s dup=0 drop=4
video:271kB audio:56kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.560985% -
meaning of ffmpeg filter option values for modifying contrast/brightness/gamma
5 septembre 2016, par benoyContext : I am using ffmpeg for processing a raw video file in raw y4m format to mp4 at various brightness values for an experiment looking at OLED display performance. After looking at the ffmpeg documentation I was able to find the following filter (
eq) for modifying the brightness of the video.
https://ffmpeg.org/ffmpeg-filters.html#eqI used the information from the ffmpeg documentation and the following article (https://wjwoodrow.wordpress.com/2015/07/12/more-ffmpeg-hell/) to get videos with different qualities. But neither the ffmpeg documentation nor the article explains these values in detail.
Question : Now my query is that, what does these
eqvalues range correspond to ? Is it a percentage ? For example,ffmpeg -i input_1080p24.y4m -vf eq=1:-0.5:1:1:1:1:1:1 -vcodec libx264 -b:v 8000k -s 1920x1080 -g 15 -n -r 30 output_1080p.mp4gives me a output video with reduced brightness. But how do I quantify this brightness reduction ? Does this
eq = -0.5correspond to 50% reduction in original brightness ? In other words, is this a linear scale ?This is my first post on stackoverflow. Thanks !
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