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Médias (1)
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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
Autres articles (37)
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Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
Selection of projects using MediaSPIP
2 mai 2011, parThe examples below are representative elements of MediaSPIP specific uses for specific projects.
MediaSPIP farm @ Infini
The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.
Sur d’autres sites (5685)
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Unable to encode single frame h264 (.mp4) video with FFmpeg. No video stream present
1er avril 2021, par MaxitoI have achieved this with ffmpeg command line tool using the command. The folder had only one image.





ffmpeg -r 24 -i image%03d.bmp -c:v libx264 -pix_fmt yuv420p
 oneframex.mp4





I would like to do the same with C++. If I encode a video of three or more frames, video encodes correctly, but the result of encoding a one or two frames video never has a video stream, as reported by ffprobe and some media players.



Comparing with ffprobe, my video (the one with three or more frames) and the one generated by the command tool show almost the same information. Only bitrate and encoder version are different.



I have tried adding force_key_frames to 1, tried with many encoding options and have be unsuccessful.



The application output gives me this information :





[libx264 @ 20d1b840] using cpu capabilities : MMX2 SSE2Fast SSSE3
 SSE4.2 AVX

 

[libx264 @ 20d1b840] profile High, level 4.0

 

[libx264 @ 20d1b840] 264 - core 142 r2431 ac76440 - H.264/MPEG-4 AVC
 codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html -
 options : cabac=0 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=dia subme=8
 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=0 trellis=0
 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2
 threads=1 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1
 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0
 keyint=1 keyint_min=1 scenecut=0 intra_refresh=0 rc=crf mbtree=0
 crf=10.0 qcomp=0.60 qpmin=0 qpmax=25 qpstep=4 ip_ratio=1.40 aq=1:1.00





These are my main parameters :



pCodecCtx->codec_id = AV_CODEC_ID_H264;
pCodecCtx->pix_fmt= AV_PIX_FMT_YUV420P; 
pCodecCtx->gop_size = 1;
pCodecCtx->bit_rate = 400000;
pCodecCtx->me_range = 16;
pCodecCtx->max_qdiff = 4;
pCodecCtx->qcompress = 0.6;
pCodecCtx->qmin = 0;
pCodecCtx->qmax = 25;
pCodecCtx->time_base.den = 24;
pCodecCtx->time_base.num = 1;

AVDictionary *param = 0;
 av_dict_set(&param, "preset", "slow", 0);
 av_dict_set(&param, "profile", "high", 0);
 av_dict_set(&param, "crf", "10", 0); //this gave me quality
 av_dict_set(&param, "force_key_frames", "1", 0);



In my encoding I just added



ppicture->pts = pCodecCtx->frame_number



to avoid non-strictly-monotonic PTS message. And tried the methods from this question in case it had something to do.



I’m sure I must be missing some important parameter to be able to create such a small video. I will take any suggestion.


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Why VLC not display RTP stream
5 janvier 2018, par Alexandr LukovnikovI am new in RTP. I whant to start RTSP server on embeded device. Now I can whatching video file, that stored in flash memory. But when I start translate video, that encoded whith x264, VLC not display anything.
Just buffering, nothing elsecore debug: `rtsp://172.16.50.194:1935/live1.sdp' successfully opened
core debug: Buffering 0%
packetizer_h264 debug: found NAL_SPS (sps_id=0)
core debug: Stream buffering done (11 ms in 133 ms)
core debug: Decoder wait done in 0 ms
packetizer_h264 debug: found NAL_PPS (pps_id=0 sps_id=0)
core error: ES_OUT_SET_(GROUP_)PCR is called too late (pts_delay increased to 30 ms)
core error: ES_OUT_RESET_PCR called
core debug: Buffering 0%
core debug: Buffering 0%
core debug: Buffering 0%
core debug: Stream buffering done (111 ms in 706 ms)
core debug: Decoder wait done in 0 ms
core error: ES_OUT_SET_(GROUP_)PCR is called too late (pts_delay increased to 594 ms)
core error: ES_OUT_RESET_PCR called
core debug: Buffering 0%
...
core debug: Buffering 0%
live555 warning: no data received in 10s, eof ?
core debug: EOF reachedThat is Wireshark dump
SPS slice
1111 0100 = Profile_idc: Unknown (244)
0... .... = Constraint_set0_flag: 0
.0.. .... = Constraint_set1_flag: 0
..0. .... = Constraint_set2_flag: 0
...0 .... = Constraint_set3_flag: 0
.... 0... = Constraint_set4_flag: 0
.... .0.. = Constraint_set5_flag: 0
.... ..00 = Reserved_zero_2bits: 0
0000 1101 = Level_id: 13 [Level 1.3 768 kb/s]
1... .... = seq_parameter_set_id: 0
.001 00.. = log2_max_frame_num_minus4: 3
.... ..01 1... .... = pic_order_cnt_type: 2
.001 01.. = num_ref_frames: 4
.... ..1. = gaps_in_frame_num_value_allowed_flag: 1
.... ...0 10.. .... = pic_width_in_mbs_minus1: 1
..00 0001 0100 0... = pic_height_in_map_units_minus1: 39
.... .0.. = frame_mbs_only_flag: 0
.... ..0. = mb_adaptive_frame_field_flag: 0
.... ...1 = direct_8x8_inference_flag: 1
1... .... = frame_cropping_flag: 1
.1.. .... = frame_crop_left_offset: 0
..1. .... = frame_crop_left_offset: 0
...1 .... = frame_crop_top_offset: 0
.... 1... = frame_crop_bottom_offset: 0
.... .0.. = vui_parameters_present_flag: 0
.... ..1. = rbsp_stop_bit: 1
.... ...0 = rbsp_trailing_bits: 0PPS slice
1... .... = pic_parameter_set_id: 0
.1.. .... = seq_parameter_set_id: 0
..0. .... = entropy_coding_mode_flag: 0
...0 .... = pic_order_present_flag: 0
.... 1... = num_slice_groups_minus1: 0
.... .1.. = num_ref_idx_l0_active_minus1: 0
.... ..1. = num_ref_idx_l1_active_minus1: 0
.... ...0 = weighted_pred_flag: 0
00.. .... = weighted_bipred_idc: 0
..00 0010 110. .... = pic_init_qp_minus26(se(v)): 11
...1 .... = pic_init_qs_minus26: 0
.... 1... = chroma_qp_index_offset: 0
.... .1.. = deblocking_filter_control_present_flag: 1
.... ..0. = constrained_intra_pred_flag: 0
.... ...0 = redundant_pic_cnt_present_flag: 0
1... .... = rbsp_stop_bit: 1
.000 0000 = rbsp_trailing_bits: 0And SEI
x264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=10 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00What could be my mistake ?
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Convert video with ffmpeg to have the same quality
14 mai 2019, par zlonI want to make some present for my grandma. And prepare some video. Unfortunately here video player is old and could not read some file formats. She is not at home now, so I don’t know which player she has. But I have a file which is OK for here system :
File which is in a correct format :
General
Complete name : let.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 688 MiB
Duration : 1 h 35 min
Overall bit rate : 1 002 kb/s
Writing application : VirtualDubMod 1.4.13
Writing library : VirtualDub build 14328/release
FileExtension_Invalid : avi
Video
ID : 0
Format : MPEG-4 Visual
Format profile : Simple@L3
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 1 h 35 min
Bit rate : 800 kb/s
Width : 544 pixels
Height : 416 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.141
Stream size : 549 MiB (80%)
Writing library : XviD 0.0.09 (UTC 2003-03-25)I have the following file, which here system could not read :
File in the incorrect format :
General
Complete name : amf.avi
Format : AVI
Format/Info : Audio Video Interleave
Overall bit rate : 2 167 kb/s
Video
ID : 0
Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings : BVOP1
Format settings, BVOP : 1
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (MPEG)
Codec ID : DX50
Codec ID/Hint : DivX 5
Bit rate : 1 710 kb/s
Width : 720 pixels
Height : 528 pixels
Display aspect ratio : 4:3
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.188
Stream size : 1.15 GiB (79%)
Writing library : XviD 64Could you help me to convert the second file to a format of the first ? (It would be nice if the output would be of the similar quality)
I have Ubuntu, and I think
ffmpegshould be able to do it.CROSS POSTED FROM : SE Video production.
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