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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (9)
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Organiser par catégorie
17 mai 2013, parDans MédiaSPIP, une rubrique a 2 noms : catégorie et rubrique.
Les différents documents stockés dans MédiaSPIP peuvent être rangés dans différentes catégories. On peut créer une catégorie en cliquant sur "publier une catégorie" dans le menu publier en haut à droite ( après authentification ). Une catégorie peut être rangée dans une autre catégorie aussi ce qui fait qu’on peut construire une arborescence de catégories.
Lors de la publication prochaine d’un document, la nouvelle catégorie créée sera proposée (...) -
Les thèmes de MediaSpip
4 juin 20133 thèmes sont proposés à l’origine par MédiaSPIP. L’utilisateur MédiaSPIP peut rajouter des thèmes selon ses besoins.
Thèmes MediaSPIP
3 thèmes ont été développés au départ pour MediaSPIP : * SPIPeo : thème par défaut de MédiaSPIP. Il met en avant la présentation du site et les documents média les plus récents ( le type de tri peut être modifié - titre, popularité, date) . * Arscenic : il s’agit du thème utilisé sur le site officiel du projet, constitué notamment d’un bandeau rouge en début de page. La structure (...) -
Déploiements possibles
31 janvier 2010, parDeux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
Version mono serveur
La version mono serveur consiste à n’utiliser qu’une (...)
Sur d’autres sites (2816)
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popen returns output after delay ?
7 février 2013, par ScarfaceI am executing FFMPEG with
popen()to get the result of the process. The main reason I am doing this is so I can stream constant output and build a progress bar.The issue is that the process starts and I receive some initial information. The rest of the information does not appear until after the process is done however. So essentially, the rest of the output (output on the progress) which comes on intervals when the process is going is delayed right before the process and all comes at once after the process is done which is useless.
I need the output to constantly come so I can update a progress bar. If I change 2>&1 to 2> stderr.txt that text file receives output consistently but I would like to receive in php since many processes may be running. Anyone have any ideas on solving this ? It seems noone can figure this out...and it is driving me crazy ! IF anyone helps me figure this out (and actually solve it), I will start a bounty and then accept their answer.
$handle = popen ('/usr/local/bin/ffmpeg -i /home/g/Desktop/cave.wmv -deinterlace -acodec libfaac -ab 96k -ar 44100 -vcodec libx264 -s 480x320 -f flv /home/g/Desktop/file.flv 2>&1', 'r');
if ($handle) {
while(! feof ($handle)) {
echo $read = fgets ($handle);
ob_flush();
flush();
}
pclose ($handle);
}OUTPUTS
ffmpeg version git-N-30561-g6700aa8, Copyright (c) 2000-2011 the FFmpeg developers built on Jun 5 2011 21:10:26 with gcc 4.5.2 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab libavutil 51. 4. 0 / 51. 4. 0 libavcodec 53. 6. 1 / 53. 6. 1 libavformat 53. 2. 0 / 53. 2. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 13. 0 / 2. 13. 0 libswscale 0. 14. 1 / 0. 14. 1 libpostproc 51. 2. 0 / 51. 2. 0 Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 29.97 (30000/1001) Input #0, asf, from '/home/geoff/Desktop/cave.wmv': Metadata: WMFSDKVersion : 11.0.5721.5145 WMFSDKNeeded : 0.0.0.0000 IsVBR : 0 Duration: 00:01:37.93, bitrate: 263 kb/s Stream #0.0(eng): Video: vc1 (Advanced), yuv420p, 320x240, 256 kb/s, PAR 1:1 DAR 4:3, 29.97 tbr, 1k tbn, 1k tbc [buffer @ 0xacae200] w:320 h:240 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param: [scale @ 0xacbc120] w:320 h:240 fmt:yuv420p -> w:480 h:320 fmt:yuv420p flags:0x4 [libx264 @ 0xacbb7e0] Default settings detected, using medium profile [libx264 @ 0xacbb7e0] using SAR=1/1 [libx264 @ 0xacbb7e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64 [libx264 @ 0xacbb7e0] profile High, level 2.1 [libx264 @ 0xacbb7e0] 264 - core 115 r1995 c1e60b9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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 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=1 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, flv, to '/home/geoff/Desktop/file.flv': Metadata: WMFSDKVersion : 11.0.5721.5145 WMFSDKNeeded : 0.0.0.0000 IsVBR : 0 encoder : Lavf53.2.0 Stream #0.0(eng): Video: libx264, yuv420p, 480x320 [PAR 1:1 DAR 3:2], q=2-31, 200 kb/s, 1k tbn, 29.97 tbc Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop, [?] for help
**THEN AFTER THE PROCESS IS COMPLETE OUTPUTS**
frame= 49 fps= 0 q=29.0 size= 17kB time=00:00:00.23 bitrate= 593.9kbits/s frame= 58 fps= 52 q=29.0 size= 29kB time=00:00:00.53 bitrate= 448.9kbits/s frame= 71 fps= 44 q=29.0 size= 48kB time=00:00:00.96 bitrate= 405.7kbits/s frame= 85 fps= 39 q=29.0 size= 69kB time=00:00:01.43 bitrate= 393.2kbits/s frame= 104 fps= 38 q=29.0 size= 90kB time=00:00:02.06 bitrate= 358.3kbits/s frame= 117 fps= 36 q=29.0 size= 104kB time=00:00:02.50 bitrate= 339.5kbits/s frame= 134 fps= 36 q=29.0 size= 119kB time=00:00:03.06 bitrate= 317.6kbits/s frame= 153 fps= 36 q=29.0 size= 137kB time=00:00:03.70 bitrate= 303.5kbits/s frame= 167 fps= 35 q=29.0 size= 153kB time=00:00:04.17 bitrate= 300.1kbits/s frame= 185 fps= 35 q=29.0 size= 173kB time=00:00:04.77 bitrate= 296.8kbits/s frame= 201 fps= 35 q=29.0 size= 199kB time=00:00:05.30 bitrate= 306.8kbits/s frame= 218 fps= 35 q=29.0 size= 222kB time=00:00:05.87 bitrate= 310.3kbits/s frame= 237 fps= 35 q=29.0 size= 245kB time=00:00:06.50 bitrate= 309.1kbits/s frame= 254 fps= 35 q=29.0 size= 267kB time=00:00:07.07 bitrate= 309.7kbits/s frame= 270 fps= 34 q=29.0 size= 285kB time=00:00:07.60 bitrate= 307.2kbits/s frame= 292 fps= 35 q=29.0 size= 314kB time=00:00:08.34 bitrate= 308.5kbits/s frame= 316 fps= 36 q=29.0 size= 334kB time=00:00:09.14 bitrate= 299.3kbits/s frame= 336 fps= 36 q=29.0 size= 356kB time=00:00:09.80 bitrate= 297.0kbits/s frame= 356 fps= 36 q=29.0 size= 381kB time=00:00:10.47 bitrate= 297.9kbits/s frame= 375 fps= 36 q=29.0 size= 405kB time=00:00:11.11 bitrate= 298.5kbits/s frame= 391 fps= 36 q=29.0 size= 431kB time=00:00:11.64 bitrate= 303.5kbits/s frame= 408 fps= 36 q=29.0 size= 456kB time=00:00:12.21 bitrate= 305.8kbits/s frame= 424 fps= 35 q=29.0 size= 479kB time=00:00:12.74 bitrate= 307.8kbits/s frame= 441 fps= 35 q=29.0 size= 503kB time=00:00:13.31 bitrate= 309.3kbits/s frame= 462 fps= 36 q=29.0 size= 526kB time=00:00:14.01 bitrate= 307.4kbits/s frame= 483 fps= 36 q=29.0 size= 546kB time=00:00:14.71 bitrate= 304.2kbits/s frame= 501 fps= 36 q=29.0 size= 583kB time=00:00:15.31 bitrate= 311.9kbits/s frame= 520 fps= 36 q=29.0 size= 609kB time=00:00:15.95 bitrate= 312.7kbits/s frame= 541 fps= 36 q=29.0 size= 636kB time=00:00:16.65 bitrate= 313.1kbits/s frame= 559 fps= 36 q=29.0 size= 668kB time=00:00:17.25 bitrate= 317.3kbits/s frame= 574 fps= 36 q=29.0 size= 698kB time=00:00:17.75 bitrate= 321.9kbits/s frame= 593 fps= 36 q=29.0 size= 732kB time=00:00:18.38 bitrate= 326.1kbits/s frame= 611 fps= 36 q=29.0 size= 760kB time=00:00:18.98 bitrate= 328.0kbits/s frame= 631 fps= 36 q=29.0 size= 788kB time=00:00:19.65 bitrate= 328.5kbits/s frame= 651 fps= 36 q=29.0 size= 817kB time=00:00:20.32 bitrate= 329.2kbits/s frame= 670 fps= 36 q=29.0 size= 842kB time=00:00:20.95 bitrate= 329.0kbits/s frame= 689 fps= 36 q=29.0 size= 868kB time=00:00:21.58 bitrate= 329.4kbits/s frame= 707 fps= 36 q=29.0 size= 896kB time=00:00:22.18 bitrate= 330.8kbits/s frame= 723 fps= 36 q=29.0 size= 924kB time=00:00:22.72 bitrate= 333.0kbits/s frame= 741 fps= 36 q=29.0 size= 955kB time=00:00:23.32 bitrate= 335.4kbits/s frame= 761 fps= 36 q=29.0 size= 999kB time=00:00:23.99 bitrate= 341.0kbits/s frame= 783 fps= 36 q=29.0 size= 1025kB time=00:00:24.72 bitrate= 339.8kbits/s frame= 802 fps= 36 q=29.0 size= 1047kB time=00:00:25.35 bitrate= 338.3kbits/s frame= 821 fps= 36 q=29.0 size= 1076kB time=00:00:25.99 bitrate= 339.3kbits/s frame= 841 fps= 36 q=29.0 size= 1104kB time=00:00:26.66 bitrate= 339.2kbits/s frame= 861 fps= 36 q=29.0 size= 1137kB time=00:00:27.32 bitrate= 340.7kbits/s frame= 881 fps= 36 q=29.0 size= 1164kB time=00:00:27.99 bitrate= 340.7kbits/s frame= 901 fps= 36 q=29.0 size= 1196kB time=00:00:28.66 bitrate= 341.9kbits/s frame= 919 fps= 36 q=29.0 size= 1223kB time=00:00:29.26 bitrate= 342.5kbits/s frame= 939 fps= 36 q=29.0 size= 1259kB time=00:00:29.93 bitrate= 344.7kbits/s frame= 954 fps= 36 q=29.0 size= 1301kB time=00:00:30.43 bitrate= 350.1kbits/s frame= 970 fps= 36 q=29.0 size= 1337kB time=00:00:30.96 bitrate= 353.7kbits/s frame= 988 fps= 36 q=29.0 size= 1373kB time=00:00:31.56 bitrate= 356.3kbits/s frame= 1005 fps= 36 q=29.0 size= 1418kB time=00:00:32.13 bitrate= 361.4kbits/s frame= 1023 fps= 36 q=29.0 size= 1448kB time=00:00:32.73 bitrate= 362.4kbits/s frame= 1040 fps= 36 q=29.0 size= 1483kB time=00:00:33.30 bitrate= 364.9kbits/s frame= 1058 fps= 36 q=29.0 size= 1519kB time=00:00:33.90 bitrate= 367.1kbits/s frame= 1074 fps= 36 q=29.0 size= 1546kB time=00:00:34.43 bitrate= 367.7kbits/s frame= 1091 fps= 36 q=29.0 size= 1573kB time=00:00:35.00 bitrate= 368.3kbits/s frame= 1111 fps= 36 q=29.0 size= 1593kB time=00:00:35.66 bitrate= 365.9kbits/s frame= 1126 fps= 36 q=29.0 size= 1612kB time=00:00:36.17 bitrate= 365.1kbits/s frame= 1140 fps= 36 q=29.0 size= 1637kB time=00:00:36.63 bitrate= 366.1kbits/s frame= 1151 fps= 35 q=29.0 size= 1657kB time=00:00:37.00 bitrate= 366.9kbits/s frame= 1170 fps= 35 q=29.0 size= 1692kB time=00:00:37.63 bitrate= 368.3kbits/s frame= 1190 fps= 35 q=29.0 size= 1724kB time=00:00:38.30 bitrate= 368.6kbits/s frame= 1208 fps= 35 q=29.0 size= 1751kB time=00:00:38.90 bitrate= 368.6kbits/s frame= 1225 fps= 35 q=29.0 size= 1776kB time=00:00:39.47 bitrate= 368.6kbits/s frame= 1242 fps= 35 q=29.0 size= 1806kB time=00:00:40.04 bitrate= 369.4kbits/s frame= 1265 fps= 35 q=29.0 size= 1840kB time=00:00:40.80 bitrate= 369.4kbits/s frame= 1283 fps= 35 q=29.0 size= 1858kB time=00:00:41.40 bitrate= 367.5kbits/s frame= 1298 fps= 35 q=29.0 size= 1874kB time=00:00:41.90 bitrate= 366.3kbits/s frame= 1317 fps= 35 q=29.0 size= 1898kB time=00:00:42.54 bitrate= 365.5kbits/s frame= 1335 fps= 35 q=29.0 size= 1931kB time=00:00:43.14 bitrate= 366.7kbits/s frame= 1353 fps= 35 q=29.0 size= 1966kB time=00:00:43.74 bitrate= 368.2kbits/s frame= 1371 fps= 35 q=29.0 size= 1996kB time=00:00:44.34 bitrate= 368.8kbits/s frame= 1391 fps= 35 q=29.0 size= 2029kB time=00:00:45.01 bitrate= 369.3kbits/s frame= 1410 fps= 35 q=29.0 size= 2062kB time=00:00:45.64 bitrate= 370.2kbits/s frame= 1430 fps= 35 q=29.0 size= 2089kB time=00:00:46.31 bitrate= 369.4kbits/s frame= 1449 fps= 35 q=29.0 size= 2114kB time=00:00:46.94 bitrate= 368.8kbits/s frame= 1469 fps= 35 q=29.0 size= 2140kB time=00:00:47.61 bitrate= 368.1kbits/s frame= 1488 fps= 35 q=29.0 size= 2169kB time=00:00:48.24 bitrate= 368.3kbits/s frame= 1506 fps= 35 q=29.0 size= 2212kB time=00:00:48.84 bitrate= 371.0kbits/s frame= 1522 fps= 35 q=29.0 size= 2248kB time=00:00:49.38 bitrate= 372.8kbits/s frame= 1540 fps= 35 q=29.0 size= 2278kB time=00:00:49.98 bitrate= 373.4kbits/s frame= 1558 fps= 35 q=29.0 size= 2314kB time=00:00:50.58 bitrate= 374.7kbits/s frame= 1577 fps= 35 q=29.0 size= 2346kB time=00:00:51.21 bitrate= 375.2kbits/s frame= 1598 fps= 35 q=29.0 size= 2377kB time=00:00:51.91 bitrate= 375.1kbits/s frame= 1615 fps= 35 q=29.0 size= 2409kB time=00:00:52.48 bitrate= 375.9kbits/s frame= 1633 fps= 35 q=29.0 size= 2440kB time=00:00:53.08 bitrate= 376.4kbits/s frame= 1651 fps= 35 q=29.0 size= 2470kB time=00:00:53.68 bitrate= 376.9kbits/s frame= 1670 fps= 35 q=29.0 size= 2501kB time=00:00:54.32 bitrate= 377.2kbits/s frame= 1690 fps= 35 q=29.0 size= 2539kB time=00:00:54.98 bitrate= 378.3kbits/s frame= 1707 fps= 35 q=29.0 size= 2570kB time=00:00:55.55 bitrate= 378.9kbits/s frame= 1725 fps= 35 q=29.0 size= 2601kB time=00:00:56.15 bitrate= 379.4kbits/s frame= 1743 fps= 35 q=29.0 size= 2632kB time=00:00:56.75 bitrate= 379.8kbits/s frame= 1762 fps= 35 q=29.0 size= 2677kB time=00:00:57.39 bitrate= 382.2kbits/s frame= 1781 fps= 35 q=29.0 size= 2706kB time=00:00:58.02 bitrate= 382.0kbits/s frame= 1800 fps= 35 q=29.0 size= 2738kB time=00:00:58.65 bitrate= 382.3kbits/s frame= 1821 fps= 35 q=29.0 size= 2765kB time=00:00:59.36 bitrate= 381.6kbits/s frame= 1841 fps= 36 q=29.0 size= 2793kB time=00:01:00.02 bitrate= 381.2kbits/s frame= 1857 fps= 35 q=29.0 size= 2822kB time=00:01:00.56 bitrate= 381.7kbits/s frame= 1875 fps= 35 q=29.0 size= 2849kB time=00:01:01.16 bitrate= 381.6kbits/s frame= 1894 fps= 35 q=29.0 size= 2874kB time=00:01:01.79 bitrate= 381.0kbits/s frame= 1914 fps= 35 q=29.0 size= 2900kB time=00:01:02.46 bitrate= 380.4kbits/s frame= 1933 fps= 35 q=29.0 size= 2924kB time=00:01:03.09 bitrate= 379.7kbits/s frame= 1954 fps= 36 q=29.0 size= 2946kB time=00:01:03.79 bitrate= 378.3kbits/s frame= 1974 fps= 36 q=29.0 size= 2971kB time=00:01:04.46 bitrate= 377.5kbits/s frame= 1991 fps= 36 q=29.0 size= 3005kB time=00:01:05.03 bitrate= 378.5kbits/s frame= 2006 fps= 35 q=29.0 size= 3043kB time=00:01:05.53 bitrate= 380.4kbits/s frame= 2024 fps= 35 q=29.0 size= 3074kB time=00:01:06.13 bitrate= 380.8kbits/s frame= 2042 fps= 35 q=29.0 size= 3099kB time=00:01:06.73 bitrate= 380.5kbits/s frame= 2059 fps= 35 q=29.0 size= 3122kB time=00:01:07.30 bitrate= 380.0kbits/s frame= 2077 fps= 35 q=29.0 size= 3149kB time=00:01:07.90 bitrate= 379.9kbits/s frame= 2096 fps= 35 q=29.0 size= 3172kB time=00:01:08.53 bitrate= 379.2kbits/s frame= 2117 fps= 35 q=29.0 size= 3196kB time=00:01:09.23 bitrate= 378.2kbits/s frame= 2129 fps= 35 q=29.0 size= 3214kB time=00:01:09.63 bitrate= 378.0kbits/s frame= 2147 fps= 35 q=29.0 size= 3246kB time=00:01:10.23 bitrate= 378.6kbits/s frame= 2167 fps= 35 q=29.0 size= 3268kB time=00:01:10.90 bitrate= 377.5kbits/s frame= 2185 fps= 35 q=29.0 size= 3298kB time=00:01:11.50 bitrate= 377.8kbits/s frame= 2204 fps= 35 q=29.0 size= 3327kB time=00:01:12.13 bitrate= 377.8kbits/s frame= 2222 fps= 35 q=29.0 size= 3359kB time=00:01:12.74 bitrate= 378.3kbits/s frame= 2242 fps= 35 q=29.0 size= 3386kB time=00:01:13.40 bitrate= 377.9kbits/s frame= 2261 fps= 35 q=29.0 size= 3428kB time=00:01:14.04 bitrate= 379.3kbits/s frame= 2280 fps= 35 q=29.0 size= 3459kB time=00:01:14.67 bitrate= 379.5kbits/s frame= 2299 fps= 35 q=29.0 size= 3494kB time=00:01:15.30 bitrate= 380.1kbits/s frame= 2318 fps= 35 q=29.0 size= 3514kB time=00:01:15.94 bitrate= 379.1kbits/s frame= 2340 fps= 36 q=29.0 size= 3539kB time=00:01:16.67 bitrate= 378.1kbits/s frame= 2360 fps= 36 q=29.0 size= 3563kB time=00:01:17.34 bitrate= 377.4kbits/s frame= 2377 fps= 36 q=29.0 size= 3586kB time=00:01:17.91 bitrate= 377.1kbits/s frame= 2393 fps= 36 q=29.0 size= 3606kB time=00:01:18.44 bitrate= 376.6kbits/s frame= 2410 fps= 35 q=29.0 size= 3625kB time=00:01:19.01 bitrate= 375.9kbits/s frame= 2427 fps= 35 q=29.0 size= 3639kB time=00:01:19.57 bitrate= 374.7kbits/s frame= 2444 fps= 35 q=29.0 size= 3656kB time=00:01:20.14 bitrate= 373.7kbits/s frame= 2461 fps= 35 q=29.0 size= 3680kB time=00:01:20.71 bitrate= 373.5kbits/s frame= 2473 fps= 35 q=29.0 size= 3702kB time=00:01:21.11 bitrate= 373.9kbits/s frame= 2488 fps= 35 q=29.0 size= 3722kB time=00:01:21.61 bitrate= 373.6kbits/s frame= 2506 fps= 35 q=29.0 size= 3764kB time=00:01:22.21 bitrate= 375.0kbits/s frame= 2522 fps= 35 q=29.0 size= 3788kB time=00:01:22.75 bitrate= 375.0kbits/s frame= 2539 fps= 35 q=29.0 size= 3820kB time=00:01:23.31 bitrate= 375.6kbits/s frame= 2556 fps= 35 q=29.0 size= 3851kB time=00:01:23.88 bitrate= 376.1kbits/s frame= 2571 fps= 35 q=29.0 size= 3885kB time=00:01:24.38 bitrate= 377.2kbits/s frame= 2587 fps= 35 q=29.0 size= 3919kB time=00:01:24.91 bitrate= 378.1kbits/s frame= 2600 fps= 35 q=29.0 size= 3949kB time=00:01:25.35 bitrate= 379.0kbits/s frame= 2616 fps= 35 q=29.0 size= 3975kB time=00:01:25.88 bitrate= 379.1kbits/s frame= 2633 fps= 35 q=29.0 size= 4003kB time=00:01:26.45 bitrate= 379.3kbits/s frame= 2653 fps= 35 q=29.0 size= 4029kB time=00:01:27.12 bitrate= 378.9kbits/s frame= 2665 fps= 35 q=29.0 size= 4045kB time=00:01:27.52 bitrate= 378.6kbits/s frame= 2682 fps= 35 q=29.0 size= 4068kB time=00:01:28.08 bitrate= 378.3kbits/s frame= 2701 fps= 35 q=29.0 size= 4084kB time=00:01:28.72 bitrate= 377.1kbits/s frame= 2719 fps= 35 q=29.0 size= 4124kB time=00:01:29.32 bitrate= 378.2kbits/s frame= 2735 fps= 35 q=29.0 size= 4154kB time=00:01:29.85 bitrate= 378.7kbits/s frame= 2753 fps= 35 q=29.0 size= 4201kB time=00:01:30.45 bitrate= 380.5kbits/s frame= 2771 fps= 35 q=29.0 size= 4230kB time=00:01:31.05 bitrate= 380.6kbits/s frame= 2788 fps= 35 q=29.0 size= 4259kB time=00:01:31.62 bitrate= 380.8kbits/s frame= 2805 fps= 35 q=29.0 size= 4287kB time=00:01:32.19 bitrate= 380.9kbits/s frame= 2825 fps= 35 q=29.0 size= 4318kB time=00:01:32.86 bitrate= 380.9kbits/s frame= 2847 fps= 35 q=29.0 size= 4334kB time=00:01:33.59 bitrate= 379.3kbits/s frame= 2866 fps= 35 q=29.0 size= 4371kB time=00:01:34.22 bitrate= 380.0kbits/s frame= 2885 fps= 35 q=29.0 size= 4395kB time=00:01:34.86 bitrate= 379.6kbits/s frame= 2903 fps= 35 q=29.0 size= 4424kB time=00:01:35.46 bitrate= 379.6kbits/s frame= 2921 fps= 35 q=29.0 size= 4450kB time=00:01:36.06 bitrate= 379.5kbits/s frame= 2934 fps= 35 q=29.0 Lsize= 4512kB time=00:01:37.86 bitrate= 377.7kbits/s dup=0 drop=1 video:4454kB audio:0kB global headers:0kB muxing overhead 1.293893% frame I:13 Avg QP:19.66 size: 13557 [libx264 @ 0x95737e0] frame P:1221 Avg QP:23.87 size: 2962 [libx264 @ 0x95737e0] frame B:1700 Avg QP:30.26 size: 451 [libx264 @ 0x95737e0] consecutive B-frames: 7.2% 33.5% 39.7% 19.6% [libx264 @ 0x95737e0] mb I I16..4: 9.6% 73.3% 17.0% [libx264 @ 0x95737e0] mb P I16..4: 0.4% 2.5% 0.4% P16..4: 37.8% 18.9% 8.1% 0.0% 0.0% skip:31.8% [libx264 @ 0x95737e0] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 30.9% 1.9% 0.4% direct: 0.9% skip:65.8% L0:30.8% L1:63.8% BI: 5.4% [libx264 @ 0x95737e0] 8x8 transform intra:74.5% inter:72.0% [libx264 @ 0x95737e0] coded y,uvDC,uvAC intra: 79.7% 84.7% 50.5% inter: 14.2% 13.9% 0.7% [libx264 @ 0x95737e0] i16 v,h,dc,p: 60% 18% 4% 18% [libx264 @ 0x95737e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 12% 10% 4% 10% 15% 7% 10% 7% [libx264 @ 0x95737e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 19% 9% 4% 10% 13% 6% 8% 4% [libx264 @ 0x95737e0] i8c dc,h,v,p: 46% 21% 22% 12% [libx264 @ 0x95737e0] Weighted P-Frames: Y:0.8% UV:0.4% [libx264 @ 0x95737e0] ref P L0: 65.4% 20.8% 10.8% 2.9% 0.0% [libx264 @ 0x95737e0] ref B L0: 91.4% 8.0% 0.6% [libx264 @ 0x95737e0] ref B L1: 95.6% 4.4% [libx264 @ 0x95737e0] kb/s:372.66 -
FFmpeg not honoring bitrate for different containers ?
19 mars 2013, par Haleeq UsmanI am attempting to encode a mp4 video file into a flv video. Here is what I am doing :
#include
#include
#include
#include
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#define STREAM_FRAME_RATE 30 /* 30 images/s */
#define STREAM_PIX_FMT AV_PIX_FMT_YUV420P /* default pix_fmt */
/**************************************************************/
/* Add an output stream. */
static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec,
enum AVCodecID codec_id) {
AVCodecContext *c;
AVStream *st;
/* find the encoder */
*codec = avcodec_find_encoder(codec_id);
if (!(*codec)) {
fprintf(stderr, "Could not find encoder for '%s'\n",
avcodec_get_name(codec_id));
exit(1);
}
st = avformat_new_stream(oc, *codec);
if (!st) {
fprintf(stderr, "Could not allocate stream\n");
exit(1);
}
st->id = oc->nb_streams - 1;
c = st->codec;
switch ((*codec)->type) {
case AVMEDIA_TYPE_VIDEO:
//avcodec_get_context_defaults3(c, *codec);
c->codec_id = codec_id;
c->bit_rate = 150 * 1000; //2314000;;
//c->rc_max_rate = 150*1000;
//c->rc_buffer_size = 150*1000;
/* Resolution must be a multiple of two. */
c->width = 1280;
c->height = 720;
/* timebase: This is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. For fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identical to 1. */
c->time_base.den = STREAM_FRAME_RATE;
c->time_base.num = 1;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
c->pix_fmt = STREAM_PIX_FMT;
if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
/* just for testing, we also add B frames */
c->max_b_frames = 2;
}
if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
/* Needed to avoid using macroblocks in which some coeffs overflow.
* This does not happen with normal video, it just happens here as
* the motion of the chroma plane does not match the luma plane. */
c->mb_decision = 2;
}
break;
default:
break;
}
/* Some formats want stream headers to be separate. */
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
return st;
}
/**************************************************************/
/* video output */
static AVFrame *frame;
static AVPicture src_picture, dst_picture;
static int frame_count;
static void open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st) {
int ret;
AVCodecContext *c = st->codec;
/* open the codec */
ret = avcodec_open2(c, codec, NULL);
if (ret < 0) {
fprintf(stderr, "Could not open video codec: %s\n", av_err2str(ret));
exit(1);
}
/* allocate and init a re-usable frame */
frame = avcodec_alloc_frame();
if (!frame) {
fprintf(stderr, "Could not allocate video frame\n");
exit(1);
}
/* Allocate the encoded raw picture. */
ret = avpicture_alloc(&dst_picture, c->pix_fmt, c->width, c->height);
if (ret < 0) {
fprintf(stderr, "Could not allocate picture: %s\n", av_err2str(ret));
exit(1);
}
/* If the output format is not YUV420P, then a temporary YUV420P
* picture is needed too. It is then converted to the required
* output format. */
if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
ret = avpicture_alloc(&src_picture, AV_PIX_FMT_YUV420P, c->width,
c->height);
if (ret < 0) {
fprintf(stderr, "Could not allocate temporary picture: %s\n",
av_err2str(ret));
exit(1);
}
}
/* copy data and linesize picture pointers to frame */
*((AVPicture *) frame) = dst_picture;
}
static void close_video(AVFormatContext *oc, AVStream *st) {
avcodec_close(st->codec);
av_free(src_picture.data[0]);
av_free(dst_picture.data[0]);
av_free(frame);
}
int main(int argc, char *argv[]) {
AVFormatContext *pFormatCtx = NULL;
int i, videoStream;
AVCodecContext *pCodecCtx = NULL;
AVCodec *pCodec;
AVFrame *pFrame;
AVPacket packet;
int frameFinished;
const char *filename;
AVOutputFormat *fmt;
AVFormatContext *oc;
AVStream *video_st;
AVCodec *video_codec;
int ret;
// Register all formats, codecs and network
av_register_all();
avcodec_register_all();
avformat_network_init();
// Open video file
if (avformat_open_input(&pFormatCtx, "input_file.mp4", NULL, NULL) != 0)
return -1; // Couldn't open file
// Retrieve stream information
if (avformat_find_stream_info(pFormatCtx, NULL) < 0)
return -1; // Couldn't find stream information
// Dump information about file onto standard error
av_dump_format(pFormatCtx, 0, "input_file.mp4", 0);
// Find the first video stream
videoStream = -1;
for (i = 0; i < pFormatCtx->nb_streams; i++)
if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
videoStream = i;
break;
}
if (videoStream == -1)
return -1; // Didn't find a video stream
// Get a pointer to the codec context for the video stream
pCodecCtx = pFormatCtx->streams[videoStream]->codec;
// Find the decoder for the video stream
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if (pCodec == NULL) {
fprintf(stderr, "Unsupported codec!\n");
return -1; // Codec not found
}
// Open codec
if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0)
return -1; // Could not open codec
// Allocate video frame
pFrame = avcodec_alloc_frame();
// setup mux
filename = "output_file.flv";
fmt = av_guess_format("flv", filename, NULL);
if (fmt == NULL) {
printf("Could not guess format.\n");
return -1;
}
// allocate the output media context
oc = avformat_alloc_context();
if (oc == NULL) {
printf("could not allocate context.\n");
return -1;
}
oc->oformat = fmt;
// Add the video streams using the default format codecs
// and initialize the codecs.
video_st = NULL;
if (fmt->video_codec != AV_CODEC_ID_NONE) {
video_st = add_stream(oc, &video_codec, fmt->video_codec);
}
// Now that all the parameters are set, we can open the
// video codec and allocate the necessary encode buffers.
if (video_st)
open_video(oc, video_codec, video_st);
/* open the output file, if needed */
if (!(fmt->flags & AVFMT_NOFILE)) {
ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE);
if (ret < 0) {
fprintf(stderr, "Could not open '%s': %s\n", filename,
av_err2str(ret));
return 1;
}
}
// dump output format
av_dump_format(oc, 0, filename, 1);
// Write the stream header, if any.
ret = avformat_write_header(oc, NULL);
if (ret < 0) {
fprintf(stderr, "Error occurred when opening output file: %s\n",
av_err2str(ret));
return 1;
}
// Read frames, decode, and re-encode
while (av_read_frame(pFormatCtx, &packet) >= 0) {
// Is this a packet from the video stream?
if (packet.stream_index == videoStream) {
// Decode video frame
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
// Did we get a video frame?
if (frameFinished) {
AVFrame* newFrame = avcodec_alloc_frame(); // Initialize a new frame
int size = avpicture_get_size(video_st->codec->pix_fmt,
video_st->codec->width, video_st->codec->height);
uint8_t* picture_buf = av_malloc(size);
avpicture_fill((AVPicture *) newFrame, picture_buf,
video_st->codec->pix_fmt, video_st->codec->width,
video_st->codec->height);
// Copy only the frame content without any other disturbing
av_picture_copy((AVPicture*) newFrame, (AVPicture*) pFrame,
video_st->codec->pix_fmt, video_st->codec->width,
video_st->codec->height);
// encode the image
AVPacket pkt;
int got_output;
av_init_packet(&pkt);
pkt.data = NULL; // packet data will be allocated by the encoder
pkt.size = 0;
/* Setting newFrame->pts this way produces the error 'non-strictly-monotonic PTS' */
//if(newFrame->pts != AV_NOPTS_VALUE)
//newFrame->pts = av_rescale_q(newFrame->pts, video_st->time_base, video_st->codec->time_base);
// Setting newFrame->pts this does not produce 'non-strictly-monotonic PTS'
newFrame->pts = frame_count;
ret = avcodec_encode_video2(video_st->codec, &pkt, newFrame, &got_output);
if (ret < 0) {
fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));
exit(1);
}
if (got_output) {
if (video_st->codec->coded_frame->key_frame)
pkt.flags |= AV_PKT_FLAG_KEY;
pkt.stream_index = video_st->index;
if (pkt.pts != AV_NOPTS_VALUE)
pkt.pts = av_rescale_q(pkt.pts,
video_st->codec->time_base,
video_st->time_base);
if (pkt.dts != AV_NOPTS_VALUE)
pkt.dts = av_rescale_q(pkt.dts,
video_st->codec->time_base,
video_st->time_base);
// Write the compressed frame to the media file.
ret = av_interleaved_write_frame(oc, &pkt);
} else {
ret = 0;
}
if (ret != 0) {
fprintf(stderr, "Error while writing video frame: %s\n",
av_err2str(ret));
exit(1);
}
fprintf(stderr, "encoded frame #%d\n", frame_count);
frame_count++;
av_free(picture_buf);
av_free_packet(&pkt);
}
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&packet);
}
/* Write the trailer, if any. The trailer must be written before you
* close the CodecContexts open when you wrote the header; otherwise
* av_write_trailer() may try to use memory that was freed on
* av_codec_close(). */
av_write_trailer(oc);
/* Close video encoder (codec). */
if (video_st)
close_video(oc, video_st);
// Free the streams.
for (i = 0; i < oc->nb_streams; i++) {
av_freep(&oc->streams[i]->codec);
av_freep(&oc->streams[i]);
}
if (!(fmt->flags & AVFMT_NOFILE))
/* Close the output file. */
avio_close(oc->pb);
/* free the stream */
av_free(oc);
// Free the YUV frame holding decoded frame
av_free(pFrame);
// Close the decoder (codec)
avcodec_close(pCodecCtx);
// Close the input video file
avformat_close_input(&pFormatCtx);
return 0;
}If I change the output format to an mp4, mov, or f4v by changing :
// setup mux (FLV OUTPUT)
filename = "output_file.flv";
fmt = av_guess_format("flv", filename, NULL);
if (fmt == NULL) {
printf("Could not guess format.\n");
return -1;
}to
// setup mux (MP4 OUTPUT)
filename = "output_file.mp4";
fmt = av_guess_format("mp4", filename, NULL);
if (fmt == NULL) {
printf("Could not guess format.\n");
return -1;
}Then the bitrate is honored. Here is the output of running with a mp4 output
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input_file.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isomavc1mp42
creation_time : 2010-02-09 19:11:10
Duration: 00:04:31.80, start: 0.000000, bitrate: 2314 kb/s
Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s
Metadata:
creation_time : 2010-02-09 19:11:10
handler_name : (C) 2007 Google Inc. v08.13.2007.
Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2186 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc
Metadata:
creation_time : 2010-02-09 19:11:10
handler_name : (C) 2007 Google Inc. v08.13.2007.
[libx264 @ 02268b80] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 02268b80] profile High, level 3.1
[libx264 @ 02268b80] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
lock=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 chro
ma_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=12 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=12 rc=abr mbtree=1 bitrate=150 ratetol=1.0 qco
mp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output_file.mp4':
Stream #0:0: Video: h264, yuv420p, 1280x720, q=-1--1, 150 kb/s, 90k tbn, 30 tbc
encoded frame #0
encoded frame #1
encoded frame #2
encoded frame #3
.
.
.
encoded frame #8142
encoded frame #8143
encoded frame #8144
encoded frame #8145
[libx264 @ 02174240] frame I:771 Avg QP:47.71 size: 2739
[libx264 @ 02174240] frame P:5083 Avg QP:50.05 size: 833
[libx264 @ 02174240] frame B:2264 Avg QP:48.16 size: 91
[libx264 @ 02174240] consecutive B-frames: 59.6% 6.4% 9.0% 24.9%
[libx264 @ 02174240] mb I I16..4: 34.0% 65.8% 0.2%
[libx264 @ 02174240] mb P I16..4: 6.8% 3.0% 0.0% P16..4: 8.5% 0.4% 1.7% 0.0% 0.0% skip:79.6%
[libx264 @ 02174240] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 1.8% 0.0% 0.0% direct: 0.0% skip:98.2% L0:23.6% L1:76.4% BI: 0.0%
[libx264 @ 02174240] final ratefactor: 57.62
[libx264 @ 02174240] 8x8 transform intra:52.1% inter:98.5%
[libx264 @ 02174240] coded y,uvDC,uvAC intra: 3.1% 14.0% 0.2% inter: 0.1% 0.4% 0.0%
[libx264 @ 02174240] i16 v,h,dc,p: 69% 23% 4% 4%
[libx264 @ 02174240] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 6% 68% 1% 1% 1% 1% 0% 0%
[libx264 @ 02174240] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 41% 18% 18% 4% 4% 5% 3% 3% 3%
[libx264 @ 02174240] i8c dc,h,v,p: 98% 1% 1% 0%
[libx264 @ 02174240] Weighted P-Frames: Y:2.1% UV:1.2%
[libx264 @ 02174240] ref P L0: 72.4% 0.8% 19.1% 7.6% 0.1%
[libx264 @ 02174240] ref B L0: 89.8% 9.1% 1.2%
[libx264 @ 02174240] ref B L1: 96.2% 3.8%
[libx264 @ 02174240] kb/s:193.62The final file size of output_file.mp4 is about 6.5MB and using ffplay, I notice that bitrate was honored. Of course the quality itself shows.
Here is the output of running with a flv output :
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input_file.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isomavc1mp42
creation_time : 2010-02-09 19:11:10
Duration: 00:04:31.80, start: 0.000000, bitrate: 2314 kb/s
Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s
Metadata:
creation_time : 2010-02-09 19:11:10
handler_name : (C) 2007 Google Inc. v08.13.2007.
Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2186 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc
Metadata:
creation_time : 2010-02-09 19:11:10
handler_name : (C) 2007 Google Inc. v08.13.2007.
Output #0, flv, to 'output_file.flv':
Stream #0:0: Video: flv1, yuv420p, 1280x720, q=2-31, 150 kb/s, 90k tbn, 30 tbc
encoded frame #0
encoded frame #1
encoded frame #2
encoded frame #3
.
.
.
encoded frame #8142
encoded frame #8143
encoded frame #8144
encoded frame #8145I noticed that the bitrate is honored as long as the container is a mp4, mov, f4v, or something similar. If I try flv, wmv, or other different containers, then the bitrate is not honored. Also, the bitrate that is automatically set for wmv is different from that of flv. I am not sure what I am doing wrong. I suspect it has to do with the pts, however, I cannot find a solution :(.
-
How to write NALs produced by x264_encoder_encode() using ffmpeg av_interleaved_write_frame()
21 janvier 2013, par Haleeq UsmanI have been trying to produce a "flv" video file in the following sequence :
av_register_all();
// Open video file
if (avformat_open_input(&pFormatCtx, "6.mp4", NULL, NULL) != 0)
return -1; // Couldn't open file
// Retrieve stream information
if (avformat_find_stream_info(pFormatCtx, NULL) < 0)
return -1; // Couldn't find stream information
// Dump information about file onto standard error
av_dump_format(pFormatCtx, 0, "input_file.mp4", 0);
// Find the first video stream
videoStream = -1;
for (i = 0; i < pFormatCtx->nb_streams; i++)
if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
videoStream = i;
break;
}
if (videoStream == -1)
return -1; // Didn't find a video stream
// Get a pointer to the codec context for the video stream
pCodecCtx = pFormatCtx->streams[videoStream]->codec;
// Find the decoder for the video stream
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if (pCodec == NULL) {
fprintf(stderr, "Unsupported codec!\n");
return -1; // Codec not found
}
// Open codec
if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0)
return -1; // Could not open codec
// Allocate video frame
pFrame = avcodec_alloc_frame();
// Allocate video frame
pFrame = avcodec_alloc_frame();
// Allocate an AVFrame structure
pFrameYUV420 = avcodec_alloc_frame();
if (pFrameYUV420 == NULL)
return -1;
// Determine required buffer size and allocate buffer
numBytes = avpicture_get_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);
buffer = (uint8_t *) av_malloc(numBytes * sizeof(uint8_t));
// Assign appropriate parts of buffer to image planes in pFrameYUV420
// Note that pFrameYUV420 is an AVFrame, but AVFrame is a superset of AVPicture
avpicture_fill((AVPicture *) pFrameRGB, buffer, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);
// Setup scaler
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, SWS_BILINEAR, 0, 0, 0);
if (img_convert_ctx == NULL) {
fprintf(stderr, "Cannot initialize the conversion context!\n");
exit(1);
}
// Setup encoder/muxing now
filename = "output_file.flv";
fmt = av_guess_format("flv", filename, NULL);
if (fmt == NULL) {
printf("Could not guess format.\n");
return -1;
}
/* allocate the output media context */
oc = avformat_alloc_context();
if (oc == NULL) {
printf("could not allocate context.\n");
return -1;
}
oc->oformat = fmt;
snprintf(oc->filename, sizeof(oc->filename), "%s", filename);
video_st = NULL;
if (fmt->video_codec != AV_CODEC_ID_NONE) {
video_st = add_stream(oc, &video_codec, fmt->video_codec);
}
// Let's see some information about our format
av_dump_format(oc, 0, filename, 1);
/* open the output file, if needed */
if (!(fmt->flags & AVFMT_NOFILE)) {
ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE);
if (ret < 0) {
fprintf(stderr, "Could not open '%s': %s\n", filename, av_err2str(ret));
return 1;
}
}
/* Write the stream header, if any. */
ret = avformat_write_header(oc, NULL);
if (ret < 0) {
fprintf(stderr, "Error occurred when opening output file: %s\n", av_err2str(ret));
return 1;
}
// Setup x264 params
x264_param_t param;
x264_param_default_preset(&param, "veryfast", "zerolatency");
param.i_threads = 1;
param.i_width = video_st->codec->width;
param.i_height = video_st->codec->height;
param.i_fps_num = STREAM_FRAME_RATE; // 30 fps, same as video
param.i_fps_den = 1;
// Intra refres:
param.i_keyint_max = STREAM_FRAME_RATE;
param.b_intra_refresh = 1;
// Rate control:
param.rc.i_rc_method = X264_RC_CRF;
param.rc.f_rf_constant = 25;
param.rc.f_rf_constant_max = 35;
// For streaming:
param.b_repeat_headers = 1;
param.b_annexb = 1;
x264_param_apply_profile(&param, "baseline");
x264_t* encoder = x264_encoder_open(&param);
x264_picture_t pic_in, pic_out;
x264_picture_alloc(&pic_in, X264_CSP_I420, video_st->codec->width, video_st->codec->height);
x264_nal_t* nals;
int i_nals;
// The loop:
// 1. Read frames
// 2. Decode the frame
// 3. Attempt to re-encode using x264
// 4. Write the x264 encoded frame using av_interleaved_write_frame
while (av_read_frame(pFormatCtx, &packet) >= 0) {
// Is this a packet from the video stream?
if (packet.stream_index == videoStream) {
// Decode video frame
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
// Did we get a video frame?
if (frameFinished) {
sws_scale(img_convert_ctx, pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pic_in.img.plane, pic_in.img.i_stride);
int frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
if (frame_size >= 0) {
if (i_nals < 0)
printf("invalid frame size: %d\n", i_nals);
// write out NALs
for (i = 0; i < i_nals; i++) {
// initalize a packet
AVPacket p;
av_init_packet(&p);
p.data = nals[i].p_payload;
p.size = nals[i].i_payload;
p.stream_index = video_st->index;
p.flags = AV_PKT_FLAG_KEY;
p.pts = AV_NOPTS_VALUE;
p.dts = AV_NOPTS_VALUE;
ret = av_interleaved_write_frame(oc, &p);
}
}
printf("encoded frame #%d\n", frame_count);
frame_count++;
}
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&packet);
}
// Now we free up resources used/close codecs, and finally close our program.Here is the implementation for the add_stream() function :
/* Add an output stream. */
static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec, enum AVCodecID codec_id) {
AVCodecContext *c;
AVStream *st;
int r;
/* find the encoder */
*codec = avcodec_find_encoder(codec_id);
if (!(*codec)) {
fprintf(stderr, "Could not find encoder for '%s'\n",
avcodec_get_name(codec_id));
exit(1);
}
st = avformat_new_stream(oc, *codec);
if (!st) {
fprintf(stderr, "Could not allocate stream\n");
exit(1);
}
st->id = oc->nb_streams - 1;
c = st->codec;
switch ((*codec)->type) {
case AVMEDIA_TYPE_AUDIO:
st->id = 1;
c->sample_fmt = AV_SAMPLE_FMT_FLTP;
c->bit_rate = 64000;
c->sample_rate = 44100;
c->channels = 2;
break;
case AVMEDIA_TYPE_VIDEO:
avcodec_get_context_defaults3(c, *codec);
c->codec_id = codec_id;
c->bit_rate = 500*1000;
//c->rc_min_rate = 500*1000;
//c->rc_max_rate = 500*1000;
//c->rc_buffer_size = 500*1000;
/* Resolution must be a multiple of two. */
c->width = 1280;
c->height = 720;
/* timebase: This is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. For fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identical to 1. */
c->time_base.den = STREAM_FRAME_RATE;
c->time_base.num = 1;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
c->pix_fmt = STREAM_PIX_FMT;
if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
/* just for testing, we also add B frames */
c->max_b_frames = 2;
}
if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
/* Needed to avoid using macroblocks in which some coeffs overflow.
* This does not happen with normal video, it just happens here as
* the motion of the chroma plane does not match the luma plane. */
c->mb_decision = 2;
}
break;
default:
break;
}
/* Some formats want stream headers to be separate. */
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
return st;
}After the encoding is complete, I check the output file output_file.flv. I notice it's size is very large : 101MB and it does not play. If I use ffmpeg to decode/encode the input file, then I get an output file about 83MB in size (which is about the same size as the original .mp4 file used as input). Also, the 83MB output from just using ffmpeg C api, as opposed to using x264 for the encoding step, plays just fine. Does anyone know where I am going wrong ? I have tried researching this for a few days now but with no luck :(. I feel that I am close to making it work, however, I just cannot figure out what I am doing wrong. Thank you !
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