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• Problem recording camera stream through ffmpeg - Inappropriate ioctl for device

  16 septembre 2021, par Otter_warrior

  I'm trying to record a camera stream through ffmpeg, but I'm struggling to understand how to write a correct recording command.

  


  This is the camera format according to v4l2

  


  $ v4l2-ctl -d 1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
    Index       : 0
    Type        : Video Capture
    Pixel Format: 'RG12'
    Name        : 12-bit Bayer RGRG/GBGB
        Size: Discrete 1920x1080
            Interval: Discrete 0.033s (30.000 fps)


  


  And this is what I tried so far

  


  ffmpeg -framerate 30 -video_size 1920x1080 -i /dev/video0 output.mkv


  


  which would return this and an empty output file

  


  $ ffmpeg -f v4l2 -framerate 30 -video_size 1920x1080 -i /dev/video0 output.mkv
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/aarch64-linux-gnu --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[video4linux2,v4l2 @ 0x557fbba630] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
[video4linux2,v4l2 @ 0x557fbba630] Time per frame unknown
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 1000k tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
Finishing stream 0:0 without any data written to it.
[libx264 @ 0x557fbbd6d0] MB rate (8160000000) > level limit (16711680)
[libx264 @ 0x557fbbd6d0] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x557fbbd6d0] profile High 4:2:2, level 6.2, 4:2:2 8-bit
[libx264 @ 0x557fbbd6d0] 264 - core 152 r2854 e9a5903 - 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=12 lookahead_threads=2 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, matroska, to 'output.mkv':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv422p, 1920x1080, q=-1--1, 1000k fps, 1k tbn, 1000k tbc
    Metadata:
      encoder         : Lavc57.107.100 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=       1kB 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
Exiting normally, received signal 2.


  


  I'm new to ffmpeg so I can't determine which settings or properties could help me with this format, or if this format is even supported at all. Any help would be greatly appreciated.

  


  Note : I am working on a Jetson board, but gstreamer or nvgstcapture are not an option

  


• correctly escaping text in drawtext filter

  6 novembre 2013, par mente

  According to documentation %{}:, should be escaped with slash. But when I escape % the text is not added. There's error message saying Stray % near ')'. But what does it mean and how I can fix it ? Command and output :

  $ /usr/bin/ffmpeg -y -i /home/www/255871.mov -af 'aresample=async=1:min_hard_comp=0.100000' -vf 'scale=480:trunc(ow/a/2)*2,transpose=1 [in];movie=watermarks/text-box440.mov,scale=320:55 [bg];[in][bg] overlay=x=20:y=main_h-80,drawtext=fontsize=20:fix_bounds=1:fontfile=Helvetica\\:Style=bold:fontcolor=0xe6b300:text=small kitten \%\):x=30:y=h-80+ascent/2:draw=gte(t\,0)\;lt(t\,5) [out]' -pix_fmt yuv420p -r 24.39 -map_metadata -1 -movflags +faststart -f mp4 -vcodec libx264 -b:v 800k -maxrate 1100k -bufsize 2M -bt 256k -profile:vbaseline -acodec libfdk_aac -ab 64k -ar 44100 -ac 1 /tmp/kitten.mp4
  
  ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Mar 15 2013 18:40:14 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  
    configuration: --enable-gpl --enable-libmp3lame --enable-libvo-aacenc --enable-libx264 --enable-version3 --enable-pthreads --enable-libfaac --enable-nonfree --enable-libfdk_a
  
  ac --enable-fontconfig --enable-libfreetype
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/www/255871.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 0
  
      compatible_brands: qt
  
      creation_time   : 2012-07-17 07:42:35
  
      model           : iPhone 3GS
  
      model-rus       : iPhone 3GS
  
      encoder         : 4.2.1
  
      encoder-rus     : 4.2.1
  
      date            : 2012-07-17T10:42:35+0300
  
      date-rus        : 2012-07-17T10:42:35+0300
  
      make            : Apple
  
      make-rus        : Apple
  
    Duration: 00:00:09.38, start: 0.000000, bitrate: 790 kb/s
  
      Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 480x360, 720 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 1200 tbc
  
      Metadata:
  
        rotate          : 90
  
        creation_time   : 2012-07-17 07:42:35
  
        handler_name    : Core Media Data Handler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s
  
      Metadata:
  
        creation_time   : 2012-07-17 07:42:35
  
        handler_name    : Core Media Data Handler
  
  [Parsed_drawtext_5 @ 0x2ae9b00] Using "/usr/share/fonts/default/Type1/n019003l.pfb"
  
  [libx264 @ 0x2ae7d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x2ae7d40] profile Constrained Baseline, level 2.1
  
  [libx264 @ 0x2ae7d40] 264 - core 130 r2274 c832fe9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 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=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1100 vbv_bufsize=2000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to '/tmp/kitten.mp4':
  
    Metadata:
  
      encoder         : Lavf54.63.104
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 360x480, q=-1--1, 800 kb/s, 19512 tbn, 24.39 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, s16, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (aac -> libfdk_aac)
  
  Press [q] to stop, [?] for help
  
  [Parsed_drawtext_5 @ 0x2ae9b00] Stray % near ')'
  
      Last message repeated 201 times
  
  Stray % near ')'0.0 q=27.0 size=     480kB time=00:00:07.96 bitrate= 493.4kbits/s dup=0 drop=35
  
  [Parsed_drawtext_5 @ 0x2ae9b00] Stray % near ')'
  
      Last message repeated 77 times
  
  Starting second pass: moving header on top of the file
  
  frame=  231 fps=0.0 q=-1.0 Lsize=    1002kB time=00:00:09.47 bitrate= 866.6kbits/s dup=0 drop=50
  
  video:921kB audio:74kB subtitle:0 global headers:0kB muxing overhead 0.680957%
  
  [libx264 @ 0x2ae7d40] frame I:1     Avg QP:24.43  size: 13264
  
  [libx264 @ 0x2ae7d40] frame P:230   Avg QP:23.72  size:  4041
  
  [libx264 @ 0x2ae7d40] mb I  I16..4: 24.8%  0.0% 75.2%
  
  [libx264 @ 0x2ae7d40] mb P  I16..4:  2.3%  0.0%  4.8%  P16..4: 34.4% 28.8%  9.4%  0.0%  0.0%    skip:20.3%
  
  [libx264 @ 0x2ae7d40] coded y,uvDC,uvAC intra: 62.5% 54.2% 4.4% inter: 19.6% 20.3% 0.1%
  
  [libx264 @ 0x2ae7d40] i16 v,h,dc,p: 36% 29% 19% 16%
  
  [libx264 @ 0x2ae7d40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 21% 20%  6%  8%  7%  7%  6%  6%
  
  [libx264 @ 0x2ae7d40] i8c dc,h,v,p: 65% 15% 17%  3%
  
  [libx264 @ 0x2ae7d40] ref P L0: 93.4%  4.3%  2.3%
  
  [libx264 @ 0x2ae7d40] kb/s:796.32

• Stacking different length videos not working with ffmpeg and -itsoffset

  3 avril 2019, par Lucas Madalozzo

  I developed a video conferencing app that records the video streams separately, and I am now looking for a way to merge them. At the moment I am experimenting with -itsoffset and hstack to stack 2 videos side by side using this command :

  ffmpeg \
  
  -itsoffset 17 -i smaller.mp4 \
  
  -itsoffset 0 -i bigger.mp4 \
  
  -filter_complex hstack=inputs=2 \
  
  -c:v libx264 -crf 23 out.mp4

  The result is a side by side video where both streams remain frozen for 17 seconds then start playing, even the bigger.mp4 video that should start at time 0.

  Any help would be really appreciated !

  ffmpeg verbose :

  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 4.9.2 (Debian 4.9.2-10+deb8u1)
  
    configuration: --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libx264 --enable-libspeex --enab                                                                                                                                       le-shared --enable-pthreads --enable-libopenjpeg --enable-nonfree --enable-libopus --enable-libvorbis --enable-libvpx
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'smaller.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:00:05.16, start: 0.000000, bitrate: 444 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 480x360 [SAR 1:1 DAR 4:3], 330 kb/s, 32 fps, 32 tbr, 16384 tbn, 64 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 103 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'bigger.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.36.100
  
    Duration: 00:00:22.03, start: 0.000000, bitrate: 290 kb/s
  
      Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 480x360 [SAR 1:1 DAR 4:3], 177 kb/s, 32 fps, 32 tbr, 16384 tbn, 64 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 103 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  File 'out.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 (h264) -> hstack:input0 (graph 0)
  
    Stream #1:0 (h264) -> hstack:input1 (graph 0)
  
    hstack (graph 0) -> Stream #0:0 (libx264)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x206ed00] using SAR=1/1
  
  [libx264 @ 0x206ed00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x206ed00] profile High, level 3.1
  
  [libx264 @ 0x206ed00] 264 - core 146 - 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=3 lookahead_threads=1 sliced_thre                                                                                                                                       ads=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 scene                                                                                                                                       cut=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 'out.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 960x360 [SAR 1:1 DAR 8:3], q=-1--1, 32 fps, 16384 tbn, 32 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.35.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc58.35.100 aac
  
  frame=  709 fps=130 q=-1.0 Lsize=     573kB time=00:00:22.12 bitrate= 212.2kbits/s dup=544 drop=0 speed=4.05x
  
  video:478kB audio:81kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.445685%
  
  [libx264 @ 0x206ed00] frame I:3     Avg QP:16.86  size: 38355
  
  [libx264 @ 0x206ed00] frame P:190   Avg QP:18.22  size:  1633
  
  [libx264 @ 0x206ed00] frame B:516   Avg QP:16.23  size:   123
  
  [libx264 @ 0x206ed00] consecutive B-frames:  1.3%  2.8%  6.8% 89.1%
  
  [libx264 @ 0x206ed00] mb I  I16..4:  6.6% 54.8% 38.6%
  
  [libx264 @ 0x206ed00] mb P  I16..4:  0.4%  1.5%  0.2%  P16..4:  8.7%  4.0%  1.9%  0.0%  0.0%    skip:83.3%
  
  [libx264 @ 0x206ed00] mb B  I16..4:  0.0%  0.1%  0.0%  B16..8:  4.2%  0.3%  0.0%  direct: 0.0%  skip:95.4%  L0:37.2% L1:58.9% BI: 4.0%
  
  [libx264 @ 0x206ed00] 8x8 transform intra:66.2% inter:63.4%
  
  [libx264 @ 0x206ed00] coded y,uvDC,uvAC intra: 66.1% 65.6% 21.6% inter: 1.7% 1.1% 0.0%
  
  [libx264 @ 0x206ed00] i16 v,h,dc,p: 21% 26% 11% 42%
  
  [libx264 @ 0x206ed00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 23% 13%  5%  7%  8%  7%  7%  6%
  
  [libx264 @ 0x206ed00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 24%  9%  6%  7%  7%  6%  7%  7%
  
  [libx264 @ 0x206ed00] i8c dc,h,v,p: 46% 25% 20%  9%
  
  [libx264 @ 0x206ed00] Weighted P-Frames: Y:1.1% UV:0.0%
  
  [libx264 @ 0x206ed00] ref P L0: 66.0% 19.4% 12.0%  2.6%  0.0%
  
  [libx264 @ 0x206ed00] ref B L0: 87.2% 11.8%  1.0%
  
  [libx264 @ 0x206ed00] ref B L1: 95.2%  4.8%
  
  [libx264 @ 0x206ed00] kb/s:176.52
  
  [aac @ 0x204aa00] Qavg: 247.398