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• What is the ideal image format extraction for YUV color space and lossless compression from mxf video format using ffmpeg

  15 février 2016, par DragonDance27

  I would like to be able to work on frames from an .mxf video file. The image format of the video is JPEG 2000, using a YUV color space with 4:2:2 subsampling and lossless compression.

  My intentions are to extract frames from this video using ffmpeg. Extracted frames would then be processed in Matlab (at the moment I’m interested in performing colorization).

  I want to extract the frames with as minimal data loss as possible and I would like to work in the YUV color space. I understand PNG involves a lossless process, but only involves the RGB color space - so not an option.

  I think I can extract jpeg2000 frames in the YUV color space, but I’m not sure if I’m losing data from the compression process. I attempted the following code in ffmpeg :

  ffmpeg -i video.mxf -r 1/5 out%03d.jp2

  ... however, the extracted jp2 files are unreadable in various software, including HiView which is a specialised JPEG 2000 software.

  Quesiton 1 : Is this jpeg 2000 extraction method lossless ? What am I doing wrong ?

  I also considered extracting the images in the tiff format where I can achieve the YUV and lossless requirements. I attempted the following code in ffmpeg :

  ffmpeg -i video.mxf -vcodec tiff f%10d.tif

  ... however, the extracted tiff files are unreadable in software such as paint, paint.net and windows photo viewer.

  Question 2 : Is this tiff extraction method correct ? What am I doing wrong ?

  Question 3 : What is an ideal image format that covers my YUV and lossless requirements ?

• FFMPEG Decoded H264 to JPEG C++ [on hold]

  2 mars 2017, par user2538354

  I’m using the latest FFMPEG library and I have decoded the H264 video coming from a stream and the Picture format is FMT420P.

  I need the decoded image to be converted to JPEG2000 image (filename%d.jpg).

  I tried this code
  https://gist.github.com/RLovelett/67856c5bfdf5739944ed.

  The file is getting created but it is not rendering in any photo viewer. I think it is missing the header.

  Can someone help on this.

• ffmpeg file conversion unreadable [on hold]

  16 août 2015, par rashadb

  I used ffmpeg to shorten a Videohive file from 14 seconds to 5 seconds with the following entry on the command line :

  ffmpeg -i 15_Shopping_VKV.mov -t 5 shoes.mp4 

  The file doesn’t work when I try to play it with Quicktime. Along with other Google searches, I looked at the following links in Stackoverflow for suggestions :

  https://stackoverflow.com/questions/25831944/unreadable-files
  
  https://stackoverflow.com/questions/4818681/ffmpeg-conversion-error
  
  https://stackoverflow.com/questions/22307229/ffmpeg-mp4-file-is-not-valid

  At this point I’m out of ideas to figure out what’s wrong, let alone how to fix the problem.

  Here are some additional details :

  I managed to edit a few other Videohive files but each file comes in slightly different format and although I’ve converted a number of other files with a similar entry or one that adjusts the codec to something web ready, I’ve been unable to successfully convert this file. Like all of the other original videohive files it is readily read by QuickTime. Only after the conversion does this file not work. All other files I’ve converted worked with the following conversions for example :

  ffmpeg -i mainfile.mp4 -t 5:00 rave.mp4 

  OR

  ffmpeg -i 00299.mov -c:v libx264 dating.mp4

  Here are a few additional details that may help :

  1) a link to the broken file

  https://s3.amazonaws.com/files.parsetfss.com/90b6030c-d712-42ec-b2ee-deb43a4dd277/tfss-79b45914-9ada-4c1c-8fbc-8d652f8c00c7-shoes.mp4

  2) The printout of ffmpeg process

  News-MacBook-Air:CP08.14.15 newuser$ ffmpeg -i 15_Shopping_VKV.mov  -t 5  shoes.mov
  
  ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.7.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 ' --enable-nonfree --enable-vda
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '15_Shopping_VKV.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2015-03-07 22:03:36
  
    Duration: 00:00:14.71, start: 0.000000, bitrate: 78240 kb/s
  
      Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj422p(pc, bt470bg/bt709/bt709), 1920x1080 [SAR 72:72 DAR 16:9], 78231 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
  
      Metadata:
  
        creation_time   : 2015-03-07 22:03:36
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Photo - JPEG
  
        timecode        : 00:02:36;02
  
      Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2015-03-07 22:15:55
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:02:36;02
  
  File 'shoes.mov' already exists. Overwrite ? [y/N] y
  
  No pixel format specified, yuvj422p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x7fbc9400a000] using SAR=1/1
  
  [libx264 @ 0x7fbc9400a000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fbc9400a000] profile High 4:2:2, level 4.0, 4:2:2 8-bit
  
  [libx264 @ 0x7fbc9400a000] 264 - core 144 r2533 c8a773e - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mov, to 'shoes.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      encoder         : Lavf56.36.100
  
      Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuvj422p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        creation_time   : 2015-03-07 22:03:36
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:02:36;02
  
        encoder         : Lavc56.41.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=  150 fps=6.9 q=-1.0 Lsize=    3953kB time=00:00:04.93 bitrate=6557.7kbits/s    
  
  video:3950kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.080847%
  
  [libx264 @ 0x7fbc9400a000] frame I:1     Avg QP:25.46  size: 71679
  
  [libx264 @ 0x7fbc9400a000] frame P:72    Avg QP:25.36  size: 40886
  
  [libx264 @ 0x7fbc9400a000] frame B:77    Avg QP:27.53  size: 13357
  
  [libx264 @ 0x7fbc9400a000] consecutive B-frames:  0.7% 89.3% 10.0%  0.0%
  
  [libx264 @ 0x7fbc9400a000] mb I  I16..4: 16.5% 80.0%  3.5%
  
  [libx264 @ 0x7fbc9400a000] mb P  I16..4:  5.3% 14.6%  0.6%  P16..4: 41.1% 10.6%  3.0%  0.0%  0.0%    skip:24.9%
  
  [libx264 @ 0x7fbc9400a000] mb B  I16..4:  0.4%  1.2%  0.0%  B16..8: 32.7%  4.0%  0.7%  direct: 2.8%  skip:58.2%  L0:36.3% L1:53.2% BI:10.5%
  
  [libx264 @ 0x7fbc9400a000] 8x8 transform intra:71.7% inter:86.5%
  
  [libx264 @ 0x7fbc9400a000] coded y,uvDC,uvAC intra: 52.7% 78.6% 18.2% inter: 14.1% 26.4% 0.4%
  
  [libx264 @ 0x7fbc9400a000] i16 v,h,dc,p: 26% 18%  5% 51%
  
  [libx264 @ 0x7fbc9400a000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 13% 20%  4%  8% 12%  6%  8%  5%
  
  [libx264 @ 0x7fbc9400a000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 15% 12%  4% 14% 14%  7%  5%  2%
  
  [libx264 @ 0x7fbc9400a000] i8c dc,h,v,p: 45% 12% 27% 16%
  
  [libx264 @ 0x7fbc9400a000] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fbc9400a000] ref P L0: 65.2% 18.5% 11.3%  5.0%
  
  [libx264 @ 0x7fbc9400a000] ref B L0: 90.7%  9.1%  0.2%
  
  [libx264 @ 0x7fbc9400a000] ref B L1: 99.1%  0.9%
  
  [libx264 @ 0x7fbc9400a000] kb/s:6463.90