Recherche avancée
Autres articles (99)
-
MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
L’agrémenter visuellement
10 avril 2011MediaSPIP est basé sur un système de thèmes et de squelettes. Les squelettes définissent le placement des informations dans la page, définissant un usage spécifique de la plateforme, et les thèmes l’habillage graphique général.
Chacun peut proposer un nouveau thème graphique ou un squelette et le mettre à disposition de la communauté.
Sur d’autres sites (12822)
-
Decoding mp4/mkv using FFMPEG fails
4 avril 2019, par StarShineI’m using a project based on the latest FFmpeg git source tree, and linking to the shared DLL’s published by Zeranoe at https://ffmpeg.zeranoe.com/builds/
The playback code works and loops. It plays back h265 files (raw), mpeg, avi, and mpg files. However as soon as an mp4 or mkv container is specified as input file, regardless of what’s inside,a lot of errors are dumped from the codec. It doesn’t matter if it’s HEVC or h264.
[h264 @ 00000000xyz] No start code is found
[h264 @ 00000000xyz] Error splitting the input into NAL units.To make everything really strange, ffplay.exe plays these files just fine.
I realize that I can probably fix this by converting files into a raw format first, but I would like to be able to read and parse mp4 files a they are. Since I am using the pre-build libs of Zeraneo, my guess would be that something was not enabled during the build, but then I would expect ffplay to fail too. Do I need to set a flag in the format_context or codec_context, or provide some sort of filter identifier ?
Movies that play fine came from http://bbb3d.renderfarming.net/download.html, http://www.w6rz.net/ and http://www.sample-videos.com/
These work :
big_buck_bunny_480p_surround-fix.avi
bigbuckbunny_480x272.h265Being a total noob at ffmpeg, please help me understand what is wrong and how to fix it. If the pre-build libs are the culprit, then the second question is if someone has a convenient cmake setup to build this for windows X64 and x32 debug and release targets.
Here’s the source for initializing ffmpeg for reading
avdevice_register_all();
avfilter_register_all();
av_register_all();
avformat_network_init();The format is parsed as follows :
m_FormatContext = avformat_alloc_context();
if (avformat_open_input(&m_FormatContext, file.GetPath().ToString().c_str(), NULL, NULL) != 0)
{
//std::cout << "failed to open input" << std::endl;
success = false;
}
// find stream info
if (success)
{
if (avformat_find_stream_info(m_FormatContext, NULL) < 0)
{
//std::cout << "failed to get stream info" << std::endl;
success = false;
}
}The stream is opened as follows :
m_VideoStream = avstream;
m_FormatContext = formatContext;
if (m_VideoStream)
{
m_StreamIndex = m_VideoStream->stream_identifier;
AVCodecParameters *codecpar = m_VideoStream->codecpar;
if (codecpar)
{
AVCodecID codec_id = codecpar->codec_id;
m_Decoder = avcodec_find_decoder(codec_id);
if (m_Decoder)
{
m_CodecContext = avcodec_alloc_context3(m_Decoder);
if (m_CodecContext)
{
m_CodecContext->width = codecpar->width;
m_CodecContext->height = codecpar->height;
m_VideoSize = i3(codecpar->width, codecpar->height,1);
success = 0 == avcodec_open2(m_CodecContext, m_Decoder, NULL);
if (success)
{
if(m_CodecContext)
{
int size = av_image_get_buffer_size(format, m_CodecContext->width, m_CodecContext->height, 1);
if (size > 0)
{
av_frame = av_frame_alloc();
gl_frame = av_frame_alloc();
uint8_t *internal_buffer = (uint8_t *)av_malloc(size * sizeof(uint8_t));
av_image_fill_arrays((uint8_t**)((AVPicture *)gl_frame->data), (int*) ((AVPicture *)gl_frame->linesize), internal_buffer, format, m_CodecContext->width, m_CodecContext->height,1);
m_Packet = (AVPacket *)av_malloc(sizeof(AVPacket));
}
}
}
if (!success)
{
avcodec_close(m_CodecContext);
avcodec_free_context(&m_CodecContext);
m_CodecContext = NULL;
m_Decoder = NULL;
m_VideoStream = NULL;
}
}
else
{
m_Decoder = NULL;
m_VideoStream = NULL;
}
}
}
}And decoding on a single thread :
do
{
if (av_read_frame(m_FormatContext, m_Packet) < 0)
{
av_packet_unref(m_Packet);
m_AllPacketsSent = true;
}
else
{
if (m_Packet->stream_index == m_StreamIndex)
{
avcodec_send_packet(m_CodecContext, m_Packet);
}
}
int frame_finished = avcodec_receive_frame(m_CodecContext, av_frame);
if (frame_finished == 0)
{
if (!conv_ctx)
{
conv_ctx = sws_getContext(m_CodecContext->width,
m_CodecContext->height, m_CodecContext->pix_fmt,
m_CodecContext->width, m_CodecContext->height, format, SWS_BICUBIC, NULL, NULL, NULL);
}
sws_scale(conv_ctx, av_frame->data, av_frame->linesize, 0, m_CodecContext->height, gl_frame->data, gl_frame->linesize);
switch(format)
{
case AV_PIX_FMT_BGR32_1:
case AV_PIX_FMT_RGB32_1:
case AV_PIX_FMT_0BGR32:
case AV_PIX_FMT_0RGB32:
case AV_PIX_FMT_BGR32:
case AV_PIX_FMT_RGB32:
{
m_CodecContext->bits_per_raw_sample = 32; break;
}
default:
{
FWASSERT(format == AV_PIX_FMT_RGB32, "The format changed, update the bits per raw sample!"); break;
}
}
size_t bufferSize = m_CodecContext->width * m_CodecContext->height * m_CodecContext->bits_per_raw_sample / 8;
m_Buffer.Realloc(bufferSize, false, gl_frame->data[0]);
m_VideoSize = i3(m_CodecContext->width, m_CodecContext->height,1);
result = true;
// sends the image buffer straight to the locked texture here..
// glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, codec_ctx->width, codec_ctx->height, GL_RGB, GL_UNSIGNED_BYTE, gl_frame->data[0]);
}
av_packet_unref(m_Packet);
} while (m_Packet->stream_index != m_StreamIndex);
m_FrameDecoded = result;Any insight is appreciated !
-
ffmpeg converting .vob to .mp4 --- colors are washed out
28 mai 2021, par BlattlaI am very new to ffmpeg. Currently I am trying to convert old family movies from vob to mp4.
After getting some help I used this command :


ffmpeg -i 1998.vob -codec:v libx264 -crf 17 -pix_fmt yuv420p -codec:a aac -movflags +faststart 1998.mp4


Two things that still bug me. The output is almost 20% larger than the input and the colors are washed out. Although the movies are old and of low quality (grainy, rather flat colors, ...) the colors in the output movie are less intense than in the original one. Larger file size would be ok for me but do you have any idea which part of my command might cause the color issue ?


ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
 built with Apple clang version 12.0.0 (clang-1200.0.32.29)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
 libavutil 56. 70.100 / 56. 70.100
 libavcodec 58.134.100 / 58.134.100
 libavformat 58. 76.100 / 58. 76.100
 libavdevice 58. 13.100 / 58. 13.100
 libavfilter 7.110.100 / 7.110.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 9.100 / 5. 9.100
 libswresample 3. 9.100 / 3. 9.100
 libpostproc 55. 9.100 / 55. 9.100
Input #0, mpeg, from '1995.vob':
 Duration: 00:00:14.64, start: 0.232178, bitrate: 1676252 kb/s
 Stream #0:0[0x1bf]: Data: dvd_nav_packet
 Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 704x576 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
 Side data:
 cpb: bitrate max/min/avg: 9548800/0/0 buffer size: 1835008 vbv_delay: N/A
 Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
File '999.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
 Stream #0:1 -> #0:0 (mpeg2video (native) -> h264 (libx264))
 Stream #0:2 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7ff666814400] using SAR=12/11
[libx264 @ 0x7ff666814400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7ff666814400] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x7ff666814400] 264 - core 161 r3049 55d517b - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=6 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=17.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '999.mp4':
 Metadata:
 encoder : Lavf58.76.100
 Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt470bg, top coded first (swapped)), 704x576 [SAR 12:11 DAR 4:3], q=2-31, 25 fps, 12800 tbn
 Metadata:
 encoder : Lavc58.134.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.134.100 aac
frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= frame= 59 fps=0.0 q=22.0 size= 256kB time=00:00:02.04 bitrate=1024.2kbits/frame= 75 fps= 72 q=22.0 size= 1024kB time=00:00:02.68 bitrate=3120.9kbits/frame= 95 fps= 61 q=22.0 size= 2048kB time=00:00:03.45 bitrate=4854.6kbits/frame= 112 fps= 54 q=22.0 size= 2816kB time=00:00:04.18 bitrate=5517.2kbits/frame= 131 fps= 51 q=22.0 size= 4096kB time=00:00:04.92 bitrate=6809.0kbits/frame= 149 fps= 48 q=22.0 size= 4864kB time=00:00:05.65 bitrate=7048.3kbits/frame= 169 fps= 47 q=22.0 size= 6144kB time=00:00:06.42 bitrate=7838.3kbits/frame= 183 fps= 44 q=22.0 size= 6912kB time=00:00:07.04 bitrate=8043.1kbits/frame= 203 fps= 43 q=22.0 size= 7936kB time=00:00:07.80 bitrate=8326.3kbits/frame= 221 fps= 42 q=22.0 size= 8960kB time=00:00:08.51 bitrate=8623.2kbits/frame= 240 fps= 42 q=22.0 size= 9984kB time=00:00:09.28 bitrate=8813.5kbits/frame= 261 fps= 41 q=22.0 size= 11264kB time=00:00:10.06 bitrate=9164.0kbits/frame= 278 fps= 40 q=22.0 size= 12288kB time=00:00:10.81 bitrate=9306.9kbits/frame= 294 fps= 40 q=22.0 size= 13568kB time=00:00:11.45 bitrate=9702.3kbits/frame= 311 fps= 39 q=22.0 size= 14592kB time=00:00:12.09 bitrate=9882.4kbits/frame= 329 fps= 39 q=22.0 size= 15616kB time=00:00:12.86 bitrate=9944.5kbits/frame= 347 fps= 39 q=22.0 size= 16640kB time=00:00:13.56 bitrate=10046.8kbitsframe= 366 fps= 38 q=22.0 size= 17920kB time=00:00:14.33 bitrate=10240.0kbitsframe= 385 fps= 38 q=22.0 size= 19200kB time=00:00:15.12 bitrate=10398.9kbitsframe= 400 fps= 38 q=22.0 size= 20224kB time=00:00:15.63 bitrate=10594.9kbitsframe= 418 fps= 38 q=22.0 size= 21504kB time=00:00:16.34 bitrate=10780.1kbitsframe= 431 fps= 37 q=22.0 size= 22528kB time=00:00:16.89 bitrate=10922.7kbitsframe= 447 fps= 37 q=22.0 size= 23808kB time=00:00:17.53 bitrate=11122.0kbitsframe= 466 fps= 37 q=22.0 size= 25088kB time=00:00:18.26 bitrate=11254.5kbitsframe= 479 fps= 36 q=22.0 size= 25856kB time=00:00:18.81 bitrate=11257.1kbitsframe= 497 fps= 36 q=22.0 size= 27136kB time=00:00:19.54 bitrate=11375.8kbitsframe= 513 fps= 36 q=22.0 size= 28416kB time=00:00:20.16 bitrate=11546.8kbitsframe= 530 fps= 36 q=22.0 size= 29440kB time=00:00:20.92 bitrate=11523.9kbitsframe= 546 fps= 36 q=22.0 size= 30464kB time=00:00:21.56 bitrate=11570.9kbitsframe= 564 fps= 36 q=22.0 size= 31744kB time=00:00:22.10 bitrate=11766.1kbitsframe= 580 fps= 36 q=19.0 size= 32512kB time=00:00:22.80 bitrate=11678.8kbitsframe= 598 fps= 36 q=22.0 size= 33792kB time=00:00:23.57 bitrate=11743.1kbitsframe= 614 fps= 35 q=22.0 size= 34560kB time=00:00:24.25 bitrate=11672.0kbitsframe= 630 fps= 35 q=22.0 size= 35328kB time=00:00:24.85 bitrate=11644.6kbitsframe= 646 fps= 35 q=22.0 size= 36096kB time=00:00:25.42 bitrate=11628.3kbitsframe= 662 fps= 35 q=22.0 size= 37376kB time=00:00:26.17 bitrate=11697.1kbitsframe= 682 fps= 35 q=22.0 size= 38400kB time=00:00:26.90 bitrate=11693.6kbitsframe= 699 fps= 35 q=22.0 size= 39424kB time=00:00:27.66 bitrate=11672.2kbitsframe= 719 fps= 35 q=22.0 size= 40704kB time=00:00:28.41 bitrate=11734.5kbitsframe= 736 fps= 35 q=22.0 size= 41728kB time=00:00:29.14 bitrate=11730.3kbitsframe= 753 fps= 35 q=22.0 size= 42752kB time=00:00:29.71 bitrate=11785.2kbitsframe= 764 fps= 35 q=22.0 size= 43520kB time=00:00:30.20 bitrate=11802.0kbitsframe= 776 fps= 35 q=22.0 size= 44544kB time=00:00:30.72 bitrate=11878.4kbitsframe= 786 fps= 34 q=22.0 size= 45312kB time=00:00:31.06 bitrate=11950.4kbitsframe= 799 fps= 34 q=22.0 size= 46080kB time=00:00:31.57 bitrate=11955.9kbitsframe= 815 fps= 34 q=22.0 size= 47104kB time=00:00:32.14 bitrate=12002.6kbitsframe= 830 fps= 34 q=22.0 size= 48128kB time=00:00:32.78 bitrate=12024.2kbitsframe= 839 fps= 33 q=22.0 size= 48640kB time=00:00:33.15 bitrate=12019.2kbitsframe= 847 fps= 33 q=22.0 size= 49152kB time=00:00:33.49 bitrate=12021.9kbitsframe= 858 fps= 33 q=22.0 size= 49920kB time=00:00:33.98 bitrate=12033.5kbitsframe= 867 fps= 32 q=22.0 size= 50688kB time=00:00:34.30 bitrate=12104.6kbitsframe= 880 fps= 32 q=22.0 size= 51456kB time=00:00:34.88 bitrate=12085.1kbitsframe= 898 fps= 32 q=22.0 size= 52480kB time=00:00:35.54 bitrate=12096.2kbitsframe= 913 fps= 32 q=22.0 size= 53504kB time=00:00:36.18 bitrate=12114.1kbitsframe= 923 fps= 32 q=22.0 size= 54016kB time=00:00:36.54 bitrate=12108.7kbitsframe= 940 fps= 32 q=22.0 size= 55040kB time=00:00:37.20 bitrate=12118.9kbitsframe= 958 fps= 32 q=22.0 size= 55808kB time=00:00:37.90 bitrate=12059.8kbitsframe= 975 fps= 32 q=22.0 size= 56832kB time=00:00:38.61 bitrate=12057.2kbitsframe= 994 fps= 32 q=22.0 size= 58112kB time=00:00:39.38 bitrate=12088.3kbitsframe= 1012 fps= 32 q=22.0 size= 59136kB time=00:00:40.02 bitrate=12104.6kbitsframe= 1026 fps= 32 q=22.0 size= 59904kB time=00:00:40.64 bitrate=12075.1kbitsframe= 1038 fps= 31 q=22.0 size= 60928kB time=00:00:41.21 bitrate=12109.9kbitsframe= 1046 fps= 31 q=22.0 size= 61440kB time=00:00:41.53 bitrate=12117.6kbitsframe= 1057 fps= 31 q=22.0 size= 61952kB time=00:00:41.87 bitrate=12119.0kbitsframe= 1071 fps= 31 q=22.0 size= 62976kB time=00:00:42.45 bitrate=12152.2kbitsframe= 1083 fps= 31 q=22.0 size= 63488kB time=00:00:42.90 bitrate=12123.0kbitsframe= 1096 fps= 31 q=22.0 size= 64256kB time=00:00:43.41 bitrate=12125.0kbitsframe= 1110 fps= 31 q=22.0 size= 65280kB time=00:00:44.09 bitrate=12127.5kbitsframe= 1126 fps= 31 q=22.0 size= 66048kB time=00:00:44.62 bitrate=12123.5kbitsframe= 1131 fps= 30 q=19.0 size= 66560kB time=00:00:44.86 bitrate=12153.6kbitsframe= 1147 fps= 30 q=22.0 size= 67584kB time=00:00:45.46 bitrate=12178.4kbitsframe= 1155 fps= 30 q=22.0 size= 68096kB time=00:00:45.88 bitrate=12156.6kbitsframe= 1167 fps= 30 q=22.0 size= 68864kB time=00:00:46.33 bitrate=12174.9kbitsframe= 1175 fps= 30 q=22.0 size= 69376kB time=00:00:46.59 bitrate=12198.0kbitsframe= 1184 fps= 30 q=22.0 size= 70144kB time=00:00:46.93 bitrate=12243.3kbitsframe= 1196 fps= 30 q=22.0 size= 70912kB time=00:00:47.44 bitrate=12243.8kbitsframe= 1211 fps= 30 q=22.0 size= 71936kB time=00:00:48.06 bitrate=12260.7kbitsframe= 1226 fps= 30 q=22.0 size= 73216kB time=00:00:48.66 bitrate=12325.7kbitsframe= 1240 fps= 29 q=22.0 size= 73984kB time=00:00:49.17 bitrate=12325.3kbitsframe= 1256 fps= 29 q=22.0 size= 75264kB time=00:00:49.85 bitrate=12366.9kbitsframe= 1271 fps= 29 q=22.0 size= 76032kB time=00:00:50.43 bitrate=12350.4kbitsframe= 1280 fps= 29 q=22.0 size= 76800kB time=00:00:50.81 bitrate=12380.9kbitsframe= 1288 fps= 29 q=22.0 size= 77312kB time=00:00:51.13 bitrate=12385.4kbitsframe= 1295 fps= 29 q=22.0 size= 77824kB time=00:00:51.39 bitrate=12405.3kbitsframe= 1303 fps= 29 q=22.0 size= 78080kB time=00:00:51.73 bitrate=12364.0kbitsframe= 1316 fps= 29 q=22.0 size= 78848kB time=00:00:52.28 bitrate=12353.2kbitsframe= 1331 fps= 29 q=22.0 size= 79872kB time=00:00:52.86 bitrate=12377.3kbitsframe= 1349 fps= 29 q=22.0 size= 80896kB time=00:00:53.56 bitrate=12371.2kbitsframe= 1364 fps= 29 q=22.0 size= 81920kB time=00:00:54.14 bitrate=12394.5kbitsframe= 1379 fps= 29 q=22.0 size= 82944kB time=00:00:54.74 bitrate=12412.5kbitsframe= 1396 fps= 29 q=22.0 size= 83968kB time=00:00:55.38 bitrate=12420.5kbitsframe= 1417 fps= 29 q=22.0 size= 84992kB time=00:00:56.27 bitrate=12371.9kbitsframe= 1438 fps= 29 q=22.0 size= 86016kB time=00:00:57.10 bitrate=12338.5kbitsframe= 1458 fps= 29 q=22.0 size= 87040kB time=00:00:57.92 bitrate=12310.6kbitsframe= 1478 fps= 29 q=22.0 size= 88064kB time=00:00:58.64 bitrate=12301.4kbitsframe= 1498 fps= 29 q=22.0 size= 89088kB time=00:00:59.47 bitrate=12270.4kbits[mp4 @ 0x7ff666813200] Starting second pass: moving the moov atom to the beginning of the file
frame= 1500 fps= 28 q=-1.0 Lsize= 91853kB time=00:00:59.98 bitrate=12543.2kbits/s speed=1.13x 
video:90866kB audio:941kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.049858%
[libx264 @ 0x7ff666814400] frame I:12 Avg QP:18.57 size:116766
[libx264 @ 0x7ff666814400] frame P:426 Avg QP:20.52 size: 87768
[libx264 @ 0x7ff666814400] frame B:1062 Avg QP:23.56 size: 51088
[libx264 @ 0x7ff666814400] consecutive B-frames: 2.5% 6.4% 9.0% 82.1%
[libx264 @ 0x7ff666814400] mb I I16..4: 1.0% 87.7% 11.3%
[libx264 @ 0x7ff666814400] mb P I16..4: 0.5% 23.0% 4.2% P16..4: 25.2% 30.8% 16.1% 0.0% 0.0% skip: 0.1%
[libx264 @ 0x7ff666814400] mb B I16..4: 0.1% 1.3% 0.6% B16..8: 37.5% 21.2% 9.4% direct:28.6% skip: 1.4% L0:31.5% L1:22.8% BI:45.8%
[libx264 @ 0x7ff666814400] 8x8 transform intra:80.8% inter:75.0%
[libx264 @ 0x7ff666814400] coded y,uvDC,uvAC intra: 97.5% 95.0% 63.3% inter: 90.0% 62.4% 12.3%
[libx264 @ 0x7ff666814400] i16 v,h,dc,p: 36% 46% 6% 12%
[libx264 @ 0x7ff666814400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 16% 25% 5% 6% 7% 7% 8% 12%
[libx264 @ 0x7ff666814400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 29% 12% 6% 7% 6% 10% 7% 13%
[libx264 @ 0x7ff666814400] i8c dc,h,v,p: 36% 30% 20% 14%
[libx264 @ 0x7ff666814400] Weighted P-Frames: Y:29.3% UV:14.1%
[libx264 @ 0x7ff666814400] ref P L0: 39.8% 15.4% 21.2% 19.9% 3.8%
[libx264 @ 0x7ff666814400] ref B L0: 76.4% 19.1% 4.5%
[libx264 @ 0x7ff666814400] ref B L1: 90.7% 9.3%
[libx264 @ 0x7ff666814400] kb/s:12406.19
[aac @ 0x7ff666815c00] Qavg: 181.322


-
Decoding mp4/mkv using FFMPEG fails
14 octobre 2016, par StarShineI’m using a project based on the latest FFmpeg git source tree, and linking to the shared DLL’s published by Zeranoe at https://ffmpeg.zeranoe.com/builds/
The playback code works and loops. It plays back h265 files (raw), mpeg, avi, and mpg files. However as soon as an mp4 or mkv container is specified as input file, regardless of what’s inside,a lot of errors are dumped from the codec. It doesn’t matter if it’s HEVC or h264.
[h264 @ 00000000xyz] No start code is found
[h264 @ 00000000xyz] Error splitting the input into NAL units.To make everything really strange, ffplay.exe plays these files just fine.
I realize that I can probably fix this by converting files into a raw format first, but I would like to be able to read and parse mp4 files a they are. Since I am using the pre-build libs of Zeraneo, my guess would be that something was not enabled during the build, but then I would expect ffplay to fail too. Do I need to set a flag in the format_context or codec_context, or provide some sort of filter identifier ?
Movies that play fine came from http://bbb3d.renderfarming.net/download.html, http://www.w6rz.net/ and http://www.sample-videos.com/
These work :
big_buck_bunny_480p_surround-fix.avi
bigbuckbunny_480x272.h265Being a total noob at ffmpeg, please help me understand what is wrong and how to fix it. If the pre-build libs are the culprit, then the second question is if someone has a convenient cmake setup to build this for windows X64 and x32 debug and release targets.
Here’s the source for initializing ffmpeg for reading
avdevice_register_all();
avfilter_register_all();
av_register_all();
avformat_network_init();The format is parsed as follows :
m_FormatContext = avformat_alloc_context();
if (avformat_open_input(&m_FormatContext, file.GetPath().ToString().c_str(), NULL, NULL) != 0)
{
//std::cout << "failed to open input" << std::endl;
success = false;
}
// find stream info
if (success)
{
if (avformat_find_stream_info(m_FormatContext, NULL) < 0)
{
//std::cout << "failed to get stream info" << std::endl;
success = false;
}
}The stream is opened as follows :
m_VideoStream = avstream;
m_FormatContext = formatContext;
if (m_VideoStream)
{
m_StreamIndex = m_VideoStream->stream_identifier;
AVCodecParameters *codecpar = m_VideoStream->codecpar;
if (codecpar)
{
AVCodecID codec_id = codecpar->codec_id;
m_Decoder = avcodec_find_decoder(codec_id);
if (m_Decoder)
{
m_CodecContext = avcodec_alloc_context3(m_Decoder);
if (m_CodecContext)
{
m_CodecContext->width = codecpar->width;
m_CodecContext->height = codecpar->height;
m_VideoSize = i3(codecpar->width, codecpar->height,1);
success = 0 == avcodec_open2(m_CodecContext, m_Decoder, NULL);
if (success)
{
if(m_CodecContext)
{
int size = av_image_get_buffer_size(format, m_CodecContext->width, m_CodecContext->height, 1);
if (size > 0)
{
av_frame = av_frame_alloc();
gl_frame = av_frame_alloc();
uint8_t *internal_buffer = (uint8_t *)av_malloc(size * sizeof(uint8_t));
av_image_fill_arrays((uint8_t**)((AVPicture *)gl_frame->data), (int*) ((AVPicture *)gl_frame->linesize), internal_buffer, format, m_CodecContext->width, m_CodecContext->height,1);
m_Packet = (AVPacket *)av_malloc(sizeof(AVPacket));
}
}
}
if (!success)
{
avcodec_close(m_CodecContext);
avcodec_free_context(&m_CodecContext);
m_CodecContext = NULL;
m_Decoder = NULL;
m_VideoStream = NULL;
}
}
else
{
m_Decoder = NULL;
m_VideoStream = NULL;
}
}
}
}And dedoding on a single thread :
do
{
if (av_read_frame(m_FormatContext, m_Packet) < 0)
{
av_packet_unref(m_Packet);
m_AllPacketsSent = true;
}
else
{
if (m_Packet->stream_index == m_StreamIndex)
{
avcodec_send_packet(m_CodecContext, m_Packet);
}
}
int frame_finished = avcodec_receive_frame(m_CodecContext, av_frame);
if (frame_finished == 0)
{
if (!conv_ctx)
{
conv_ctx = sws_getContext(m_CodecContext->width,
m_CodecContext->height, m_CodecContext->pix_fmt,
m_CodecContext->width, m_CodecContext->height, format, SWS_BICUBIC, NULL, NULL, NULL);
}
sws_scale(conv_ctx, av_frame->data, av_frame->linesize, 0, m_CodecContext->height, gl_frame->data, gl_frame->linesize);
switch(format)
{
case AV_PIX_FMT_BGR32_1:
case AV_PIX_FMT_RGB32_1:
case AV_PIX_FMT_0BGR32:
case AV_PIX_FMT_0RGB32:
case AV_PIX_FMT_BGR32:
case AV_PIX_FMT_RGB32:
{
m_CodecContext->bits_per_raw_sample = 32; break;
}
default:
{
FWASSERT(format == AV_PIX_FMT_RGB32, "The format changed, update the bits per raw sample!"); break;
}
}
size_t bufferSize = m_CodecContext->width * m_CodecContext->height * m_CodecContext->bits_per_raw_sample / 8;
m_Buffer.Realloc(bufferSize, false, gl_frame->data[0]);
m_VideoSize = i3(m_CodecContext->width, m_CodecContext->height,1);
result = true;
// sends the image buffer straight to the locked texture here..
// glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, codec_ctx->width, codec_ctx->height, GL_RGB, GL_UNSIGNED_BYTE, gl_frame->data[0]);
}
av_packet_unref(m_Packet);
} while (m_Packet->stream_index != m_StreamIndex);
m_FrameDecoded = result;Any insight is appreciated !
Syndiquer tout le site
