Recherche avancée

Sur d’autres sites (8095)

• Use ffmpeg to encode raw bayer_rggb8 frames as video

  5 décembre 2019, par DekiChan

  I have some industrial camera that records and outputs frames in raw bayer_rggb8 format. Frames are 1920x1080 in size, shot at 90fps. I wan’t to create video from it (format doesn’t matter much, but preferably mp4 with x264 encoding). My frames are saved on the filesystem as frame-00001.raw, frame-00002.raw etc. Every now and then there’s empty file.

  I can convert single image to say PNG with the following command :

  ffmpeg -f image2 -c:v rawvideo -pix_fmt bayer_rggb8 -s:v 1920x1080 -i frame-00400.raw output.png

  But when I try to encode it as video with the following command :

  ffmpeg -f image2 -c:v rawvideo -pix_fmt bayer_rggb8 -s:v 1920x1080 -r 90 -i frame-%05d.raw -c:v libx264 output.mp4

  I get this console output :

  Input #0, image2, from 'frame-%05d.raw':
  
    Duration: 00:00:05.26, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: rawvideo ([186]RG[8] / 0x84752BA), bayer_rggb8, 1920x1080, 90 tbr, 90 tbn, 90 tbc
  
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x7fe5c400a200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7fe5c400a200] profile High 4:4:4 Predictive, level 5.1, 4:4:4 8-bit
  
  [libx264 @ 0x7fe5c400a200] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 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=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf58.29.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1920x1080, q=-1--1, 90 fps, 11520 tbn, 90 tbc
  
      Metadata:
  
        encoder         : Lavc58.54.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  The file is 262bytes big, cat output.mp4 returns this :

  ftypisomisomiso2avc1mp4fremdat�moovlmvhd�@budtaZmeta!hdlrmdirappl-ilst%�toodataLavf58.29.100%

  I can’t really spot the problem. It happens both on MacOS Catalina and Ubuntu 16.04.

• FFmpeg drops last frame with filter fps/framerate

  27 juin 2019, par Dzmitry

  When I convert the same mp4 video (mime:video/mp4, fps:25) with video filter fps with value 25 ffmpeg drops one (last ?) frame everytime.
  This is log :

  [h264 @ 0x7fc89ceb3cc0] Reinit context to 960x544, pix_fmt: yuv420p
  
  [h264 @ 0x7fc89cfb59c0] Reinit context to 960x544, pix_fmt: yuv420p
  
  [libx264 @ 0x7fc89cf932c0] using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x7fc89cf932c0] profile Constrained Baseline, level 5.1
  
  [libx264 @ 0x7fc89cf932c0] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=8 lookahead_threads=8 sliced_threads=1 slices=8 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=12 keyint_min=1 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=1.00 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [in @ 0x7fc89eeeda40] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
  
  [in @ 0x7fc89eeeda40] TB:0.000021 FRAME_RATE:nan SAMPLE_RATE:48000.000000
  
  [Parsed_aresample_1 @ 0x7fc89eeee9c0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:2 chl:stereo fmt:fltp r:48000Hz
  
  [Parsed_asetnsamples_2 @ 0x7fc89eeede40] tb:0.000021 sample_rate:48000.000000 nb_channels:2.000000
  
  [Parsed_volume_3 @ 0x7fc89ef049c0] n:nan t:nan pts:nan precision:float volume:1.071519 volume_dB:0.600000
  
  [in @ 0x7fc89ef05d00] w:960 h:540 pixfmt:yuv420p tb:1/12800 fr:0/1 sar:0/1 sws_param:
  
  [Parsed_fps_0 @ 0x7fc89ef06a00] fps=25/1
  
  [Parsed_scale_2 @ 0x7fc89ef07780] w:960 h:540 flags:'bilinear' interl:0
  
  [Parsed_setsar_1 @ 0x7fc89ef06cc0] w:960 h:540 sar:0/1 dar:16/9 -> sar:1/1 dar:16/9
  
  [Parsed_scale_2 @ 0x7fc89ef07780] w:960 h:540 fmt:yuv420p sar:1/1 -> w:960 h:540 fmt:yuv420p sar:1/1 flags:0x2
  
  [h264 @ 0x7fc89d164c40] Reinit context to 960x544, pix_fmt: yuv420p
  
  [Parsed_fps_0 @ 0x7fc89ef06a00] Set first pts to 0
  
  
  
  [Parsed_fps_0 @ 0x7fc89ef06a00] 609 frames in, 608 frames out; 1 frames dropped, 0 frames duplicated.
  
  [libx264 @ 0x7fc89cf932c0] frame I:61    Avg QP:18.67  size: 44710
  
  [libx264 @ 0x7fc89cf932c0] frame P:547   Avg QP:21.44  size: 19455
  
  [libx264 @ 0x7fc89cf932c0] mb I  I16..4:  4.6%  0.0% 95.4%
  
  [libx264 @ 0x7fc89cf932c0] mb P  I16..4:  3.9%  0.0%  7.9%  P16..4: 43.2% 27.9% 12.9%  0.0%  0.0%    skip: 4.3%
  
  [libx264 @ 0x7fc89cf932c0] coded y,uvDC,uvAC intra: 77.9% 90.3% 36.3% inter: 36.2% 46.0% 2.6%
  
  [libx264 @ 0x7fc89cf932c0] i16 v,h,dc,p: 23% 35% 28% 14%
  
  [libx264 @ 0x7fc89cf932c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 23% 17%  6%  7%  6%  7%  5%  5%
  
  [libx264 @ 0x7fc89cf932c0] i8c dc,h,v,p: 53% 20% 19%  8%
  
  [libx264 @ 0x7fc89cf932c0] kb/s:4397.76
  
  [aac @ 0x7fc89edc6c00] Qavg: 642.230

  I’ve already tried to modify filter with parameters round=up/near/down:eof_action=pass/round

  ffmpeg -i input.mp4 -c:v libx264 -filter:v fps=fps=25 output.mp4

  I expect to get converted videos without dropped frames.

• Convert video with ffmpeg to have the same quality

  14 mai 2019, par zlon

  I 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 64

  Could 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 ffmpeg should be able to do it.

  CROSS POSTED FROM : SE Video production.