Recherche avancée
Autres articles (55)
-
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...) -
Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
-
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...)
Sur d’autres sites (6808)
-
Revision 34626 : l’ajout de par [34537] avait oublie un ...
21 janvier 2010, par cedric@… — Logl’ajout de par pour englober le contenu principal de ...">[34537] avait oublie un
-
ffmpeg API : handle frame loss in hevc encoding
8 janvier 2024, par MarioEverything works fine until the introduction of frame->pts increment due to frame loss.


Below is the regular progression without frame->pts increments :




frame->pts=8 pkt->pts=512 pkt->dts=-512 pkt->flags=1

frame->pts=9 pkt->pts=2560 pkt->dts=0 pkt->flags=0

frame->pts=10 pkt->pts=1536 pkt->dts=512 pkt->flags=0

frame->pts=11 pkt->pts=1024 pkt->dts=1024 pkt->flags=0

frame->pts=12 pkt->pts=2048 pkt->dts=1536 pkt->flags=0

frame->pts=13 pkt->pts=4608 pkt->dts=2048 pkt->flags=0

frame->pts=14 pkt->pts=3584 pkt->dts=2560 pkt->flags=0

frame->pts=15 pkt->pts=3072 pkt->dts=3072 pkt->flags=0

frame->pts=16 pkt->pts=4096 pkt->dts=3584 pkt->flags=0

frame->pts=17 pkt->pts=6656 pkt->dts=4096 pkt->flags=0

frame->pts=18 pkt->pts=5632 pkt->dts=4608 pkt->flags=0



When I introduce the frame->pts increment it happens :




frame->pts=15 pkt->pts=512 pkt->dts=-512 pkt->flags=1

frame->pts=17 pkt->pts=4608 pkt->dts=2048 pkt->flags=0

frame->pts=19 pkt->pts=2560 pkt->dts=1536 pkt->flags=0

[mp4 @ 0x7eff842222c0] Application provided invalid, non monotonically increasing dts to muxer in stream 0 : 2048 >= 1536



So I wrote the following code as a "quick" solution (between av_packet_rescale_ts() and av_interleaved_write_frame()) :


av_packet_rescale_ts(pkt, c->time_base, st->time_base); 
 ...
 if (pkt->dts<=previous_dts) 
 { 
 if (pkt->pts<=previous_pts) 
 { 
 pkt->pts=previous_dts+1+pkt->pts-pkt->dts; 
 } 
 pkt->dts=previous_dts+1; 
 } 
 previous_dts=pkt->dts; 
 previous_pts=pkt->pts; 
 ...
 ret = av_interleaved_write_frame(fmt_ctx, pkt); 


Now I no longer have the error, but the values are :




frame->pts=15 pkt->pts=512 pkt->dts=-512 pkt->flags=1

changed frame->pts=15 pkt->pts=512 pkt->dts=1 pkt->flags=1

frame->pts=17 pkt->pts=4608 pkt->dts=2048 pkt->flags=0

frame->pts=19 pkt->pts=2560 pkt->dts=1536 pkt->flags=0

changed frame->pts=19 pkt->pts=3073 pkt->dts=2049 pkt->flags=0

frame->pts=21 pkt->pts=1536 pkt->dts=1536 pkt->flags=0

changed frame->pts=21 pkt->pts=2050 pkt->dts=2050 pkt->flags=0

frame->pts=23 pkt->pts=4096 pkt->dts=3584 pkt->flags=0

frame->pts=25 pkt->pts=8704 pkt->dts=6144 pkt->flags=0

frame->pts=27 pkt->pts=6656 pkt->dts=5632 pkt->flags=0

changed frame->pts=27 pkt->pts=7169 pkt->dts=6145 pkt->flags=0

frame->pts=29 pkt->pts=5632 pkt->dts=5632 pkt->flags=0

changed frame->pts=29 pkt->pts=6146 pkt->dts=6146 pkt->flags=0

frame->pts=31 pkt->pts=7680 pkt->dts=7168 pkt->flags=0

frame->pts=33 pkt->pts=12800 pkt->dts=10240 pkt->flags=0

frame->pts=35 pkt->pts=10752 pkt->dts=9728 pkt->flags=0

changed frame->pts=35 pkt->pts=11265 pkt->dts=10241 pkt->flags=0

frame->pts=37 pkt->pts=9728 pkt->dts=9728 pkt->flags=0

changed frame->pts=37 pkt->pts=10242 pkt->dts=10242 pkt->flags=0



What is the correct way to handle frame loss scenario ?
Is there a way to inform the encoder about frame loss ?


The encoder is "hevc_qsv" and the output format is mov (.mp4).


-
FFMPEG error when saving NDI stream to mp4
22 septembre 2020, par user1163234I am trying to record a NDI stream to a MP4 file(I want to stream the mp4 to rtmp endpoint after saving file). However I am getting this error when running this class. https://github.com/WalkerKnapp/devolay/blob/master/examples/src/main/java/com/walker/devolayexamples/recording/RecordingExample.java


Error :


Connecting to source: DESKTOP-GQNH46Q (Ari PC output)
[file @ 0x7fb4f2d48540] Setting default whitelist 'file,crypto'
x265 [info]: HEVC encoder version 0.0
x265 [info]: build info [Mac OS X][clang 8.1.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-3.1 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 1 / wpp(12 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias: 1 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip signhide tmvp b-intra
x265 [info]: tools: strong-intra-smoothing lslices=4 deblock sao
[SWR @ 0x7fb4f8893000] Using fltp internally between filters
[mp4 @ 0x7fb4f3820200] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 135 >= 107
Failed to write video flush packet, skipping: Invalid argument
configurationVersion: 1
general_profile_space: 0
general_tier_flag: 0
general_profile_idc: 1
general_profile_compatibility_flags: 0x60000000
general_constraint_indicator_flags: 0x900000000000
general_level_idc: 93
min_spatial_segmentation_idc: 0
parallelismType: 0
chromaFormat: 1
bitDepthLumaMinus8: 0
bitDepthChromaMinus8: 0
avgFrameRate: 0
constantFrameRate: 0
numTemporalLayers: 1
temporalIdNested: 1
lengthSizeMinusOne: 3
numOfArrays: 4
array_completeness[0]: 0
NAL_unit_type[0]: 32
numNalus[0]: 1
nalUnitLength[0][0]: 24
array_completeness[1]: 0
NAL_unit_type[1]: 33
numNalus[1]: 1
nalUnitLength[1][0]: 41
array_completeness[2]: 0
NAL_unit_type[2]: 34
numNalus[2]: 1
nalUnitLength[2][0]: 7
array_completeness[3]: 0
NAL_unit_type[3]: 39
numNalus[3]: 1
nalUnitLength[3][0]: 2050
[AVIOContext @ 0x7fb4f2d48640] Statistics: 2 seeks, 4 writeouts
x265 [info]: frame I: 1, Avg QP:14.03 kb/s: 16.33 
x265 [info]: frame P: 36, Avg QP:21.67 kb/s: 0.04 
x265 [info]: frame B: 73, Avg QP:24.22 kb/s: 0.03 
x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x265 [info]: consecutive B-frames: 28.9% 13.2% 18.4% 2.6% 36.8% 

encoded 110 frames in 15.13s (7.27 fps), 0.18 kb/s, Avg QP:23.29
[aac @ 0x7fb4f6aa6200] Qavg: 65536.000


Syndiquer tout le site
