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    25 avril 2011, par

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Sur d’autres sites (10805)

  • 12 ffmpeg xfade transitions : "option not found"

    17 juillet 2023, par nimda

    I'm running into a strange error where each of these following 12 of the 56 xfade transitions are throwing errors :

    


      

    • hlwind

      • 


    • hrwind

      • 


    • vuwind

      • 


    • vdwind

      • 


    • coverleft

      • 


    • coverright

      • 


    • coverup

      • 


    • coverdown

      • 


    • revealleft

      • 


    • revealright

      • 


    • revealup

      • 


    • revealdown

      • 


    


    I've tested all filter transitions with the following command, which is being generated by a nodeJS app with the fluent-ffmpeg library, and only the twelve listed above fail with the same error "option not found" :

    


    ffmpeg -f lavfi -t 169
  -i color=c=000000:s=960x540:r=30:duration=169
  -i file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-1.jpg
  -i file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-2.jpg 
  -filter_complex
    [1:v]format=pix_fmts=yuva420p,scale=w=4608:h=-1,zoompan=z='1.2+(0*(ot/4))':x='(on/(30*4))*(iw-iw/1.2)':y='(ih-ih/zoom)/2':d=120:s=960x540[1_up];
    [1_up]scale=w=960:h=-1[1_down];
    [2:v]format=pix_fmts=yuva420p,scale=w=4608:h=-1,zoompan=z='1.2+(0*(ot/4))':x='(on/(30*4))*(iw-iw/1.2)':y='(ih-ih/zoom)/2':d=120:s=960x540[2_up];
    [2_up]scale=w=960:h=-1[2_down];
    [1_down][2_down]xfade=transition=revealdown:duration=1:offset=3[2_out];
    [0:v][2_out]overlay=x=0:y=0:enable='lte(t,7)'[all_out]
  -vcodec libx264 -r 30 -f mp4 -map [all_out] -preset veryfast -crf 18 -movflags frag_keyframe+empty_moov -pix_fmt yuv420p all.mp4


    


    fflog output :

    


    ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, lavfi, from 'color=c=000000:s=960x540:r=30:duration=169':
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: wrapped_avframe, yuv420p, 960x540 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 30 tbn
Input #1, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-1.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 36486 kb/s
  Stream #1:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
Input #2, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-2.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 35680 kb/s
  Stream #2:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
[Parsed_xfade_8 @ 0x60000137cb00] [Eval @ 0x16f9b5348] Undefined constant or missing '(' in 'revealdown'
[Parsed_xfade_8 @ 0x60000137cb00] Unable to parse option value "revealdown"
Error applying option 'transition' to filter 'xfade': Option not found
Error initializing complex filters.
Option not found


    


    The fflog for a successful video generation follows (for comparison to the erroneous log above) :

    


    ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, lavfi, from 'color=c=000000:s=960x540:r=30:duration=169':
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: wrapped_avframe, yuv420p, 960x540 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 30 tbn
Input #1, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-1.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 36486 kb/s
  Stream #1:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
Input #2, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-2.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 35680 kb/s
  Stream #2:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
Stream mapping:
  Stream #0:0 (wrapped_avframe) -> overlay
  Stream #1:0 (mjpeg) -> format:default
  Stream #2:0 (mjpeg) -> format:default
  overlay:default -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[swscaler @ 0x140158000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x120098000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x130078000] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 2 times
[swscaler @ 0x140598000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x1302d8000] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 1 times
[libx264 @ 0x138e09080] using SAR=1/1
[libx264 @ 0x138e09080] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x138e09080] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x138e09080] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=4 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'all.mp4':
  Metadata:
    encoder         : Lavf60.3.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], q=2-31, 30 fps, 15360 tbn
    Metadata:
      encoder         : Lavc60.3.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
frame=   32 fps=0.0 q=24.0 size=       0kB time=00:00:01.00 bitrate=   0.3kbits/s speed=1.94x    
frame=   87 fps= 84 q=24.0 size=       0kB time=00:00:02.83 bitrate=   0.1kbits/s speed=2.75x    
frame=  164 fps=107 q=24.0 size=       0kB time=00:00:05.40 bitrate=   0.1kbits/s speed=3.52x    
frame=  812 fps=399 q=24.0 size=     512kB time=00:00:26.96 bitrate= 155.5kbits/s speed=13.3x    
frame= 1821 fps=718 q=24.0 size=     512kB time=00:01:00.60 bitrate=  69.2kbits/s speed=23.9x    
frame= 2469 fps=813 q=24.0 size=     512kB time=00:01:22.23 bitrate=  51.0kbits/s speed=27.1x    
frame= 3421 fps=967 q=24.0 size=     512kB time=00:01:53.96 bitrate=  36.8kbits/s speed=32.2x    
frame= 4522 fps=1120 q=24.0 size=     768kB time=00:02:30.63 bitrate=  41.8kbits/s speed=37.3x    
frame= 5070 fps=1184 q=-1.0 Lsize=     812kB time=00:02:48.90 bitrate=  39.4kbits/s speed=39.5x    
video:769kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 5.626653%
[libx264 @ 0x138e09080] frame I:21    Avg QP: 2.73  size:  3710
[libx264 @ 0x138e09080] frame P:1305  Avg QP: 6.83  size:   449
[libx264 @ 0x138e09080] frame B:3744  Avg QP: 9.07  size:    33
[libx264 @ 0x138e09080] consecutive B-frames:  1.1%  1.4%  0.0% 97.5%
[libx264 @ 0x138e09080] mb I  I16..4: 95.4%  0.7%  3.8%
[libx264 @ 0x138e09080] mb P  I16..4:  0.1%  0.3%  0.1%  P16..4:  2.3%  0.2%  0.1%  0.0%  0.0%    skip:97.0%
[libx264 @ 0x138e09080] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0%  0.0%  direct: 0.1%  skip:99.8%  L0:70.9% L1:27.3% BI: 1.8%
[libx264 @ 0x138e09080] 8x8 transform intra:13.8% inter:71.9%
[libx264 @ 0x138e09080] coded y,uvDC,uvAC intra: 19.1% 12.6% 5.2% inter: 0.3% 0.5% 0.0%
[libx264 @ 0x138e09080] i16 v,h,dc,p: 94%  2%  4%  1%
[libx264 @ 0x138e09080] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 41% 22%  2%  6%  2%  9%  3%  8%
[libx264 @ 0x138e09080] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 32% 16%  2% 11%  4% 12%  3%  8%
[libx264 @ 0x138e09080] i8c dc,h,v,p: 88%  9%  2%  1%
[libx264 @ 0x138e09080] Weighted P-Frames: Y:1.6% UV:1.6%
[libx264 @ 0x138e09080] kb/s:37.25


    


  • FFmpeg command to capture Audio from Android mobile

    24 novembre 2023, par Uday

    I'm trying to capture Audio from my Android mobile using FFmpeg.
Tried the below commands and the recorded clip has no Audio in it, it's just a dark black screen with no audio/video.

    


    Basically, I want to stream the live microphone audio to the RTSP server

    


    Given all Android permission for the microphone & camera.

    


    Lib used : ffmpeg_kit_flutter

    


    Here are the commands which I tried :

    


     FFmpegKit.execute('-y -f android_camera -i 0:1 -r 30 -c:a aac -f rtsp -rtsp_transport tcp "$Url"');


    


    Command :

    


    FFmpegKit.execute('-y -f android_camera -i 0:1 -r 30 -c:a libmp3lame -qscale:a 2 "/storage/emulated/0/Download/androidvideo.mp3"');

FFmpegKit.execute('-y -f android_camera -i 0:0 -r 30 -c:a wavpack -b:a 64k "/storage/emulated/0/Download/androidvideo.wav"');


    


    This command records video but no audio in it

    


    FFmpegKit.execute('-video_size hd720 -f android_camera -camera_index 1 -i anything -r 10 -t 00:00:15 "$dir/androidvideo.mp4”');


    


    Response

    


    I/flutter (22881): Loading ffmpeg-kit-flutter.
D/ffmpeg-kit-flutter(22881): FFmpegKitFlutterPlugin com.arthenica.ffmpegkit.flutter.FFmpegKitFlutterPlugin@7f3db78 started listening to events on io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler$EventSinkImplementation@518a6b1.
I/flutter (22881): Loaded ffmpeg-kit-flutter-android-https-arm64-v8a-5.1.0.
D/VendorTagDescriptor(22881): addVendorDescriptor: vendor tag id 3854507339 added
W/MapperHal(22881): buffer descriptor with invalid usage bits 0x202000
D/ViewRootImpl@53a7452[FlutterFragmentActivity](22881): ViewPostIme pointer 1
W/ACameraCaptureSession(22881): Device is closed but session 0 is not notified
I/flutter (22881): logs:ffmpeg version n5.1.2
I/flutter (22881): logs: Copyright (c) 2000-2022 the FFmpeg developers
I/flutter (22881): logs:
I/flutter (22881): logs:  built with Android (7155654, based on r399163b1) clang version 11.0.5 (https://android.googlesource.com/toolchain/llvm-project 87f1315dfbea7c137aa2e6d362dbb457e388158d)
I/flutter (22881): logs:  configuration: --cross-prefix=aarch64-linux-android- --sysroot=/files/android-sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/ffmpeg-kit/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --target-os=android --enable-neon --enable-asm --enable-inline-asm --ar=aarch64-linux-android-ar --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --ranlib=aarch64-linux-android-ranlib --strip=aarch64-linux-android-strip --nm=aarch64-linux-android-nm --extra-libs='-L/home/taner/Projects/ffmpeg-kit/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --disable-autodetect --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --disable-static --enable-shared --enable-pthreads --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --
I/flutter (22881): logs:  libavutil      57. 28.100 / 57. 28.100
I/flutter (22881): logs:  libavcodec     59. 37.100 / 59. 37.100
I/flutter (22881): logs:  libavformat    59. 27.100 / 59. 27.100
I/flutter (22881): logs:  libavdevice    59.  7.100 / 59.  7.100
I/flutter (22881): logs:  libavfilter     8. 44.100 /  8. 44.100
I/flutter (22881): logs:  libswscale      6.  7.100 /  6.  7.100
I/flutter (22881): logs:  libswresample   4.  7.100 /  4.  7.100
I/flutter (22881): logs:[android_camera @ 0x7450bb2f80] Requested video_size 0x0 not available, falling back to 4032x3024
I/flutter (22881): logs:Input #0, android_camera, from '0:0':
I/flutter (22881): logs:  Duration: 
I/flutter (22881): logs:N/A
I/flutter (22881): logs:, start: 
I/flutter (22881): logs:299109.760553
I/flutter (22881): logs:, bitrate: 
I/flutter (22881): logs:N/A
I/flutter (22881): logs:
I/flutter (22881): logs:  Stream #0:0
I/flutter (22881): logs:: Video: rawvideo (NV21 / 0x3132564E), nv21, 4032x3024
I/flutter (22881): logs:, 
I/flutter (22881): logs:30 fps, 
I/flutter (22881): logs:30 tbr, 
I/flutter (22881): logs:1000000000.00 tbn
I/flutter (22881): logs:
I/flutter (22881): logs:    Side data:
I/flutter (22881): logs:      
I/flutter (22881): logs:displaymatrix: rotation of -90.00 degrees
I/flutter (22881): logs:
I/flutter (22881): logs:Stream mapping:
I/flutter (22881): logs:  Stream #0:0 -> #0:0
I/flutter (22881): logs: (rawvideo (native) -> mpeg4 (native))
I/flutter (22881): logs:
I/flutter (22881): logs:Press [q] to stop, [?] for help
I/flutter (22881): logs:Output #0, mp4, to '/storage/emulated/0/Download/androidvideo.mp4':
I/flutter (22881): logs:  Metadata:
I/flutter (22881): logs:    encoder         : 
I/flutter (22881): logs:Lavf59.27.100
I/flutter (22881): logs:
I/flutter (22881): logs:  Stream #0:0
I/flutter (22881): logs:: Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, progressive), 3024x4032, q=2-31, 200 kb/s
I/flutter (22881): logs:, 
I/flutter (22881): logs:30 fps, 
I/flutter (22881): logs:15360 tbn
I/flutter (22881): logs:
I/flutter (22881): logs:    Metadata:
I/flutter (22881): logs:      encoder         : 
I/flutter (22881): logs:Lavc59.37.100 mpeg4
I/flutter (22881): logs:
I/flutter (22881): logs:    Side data:
I/flutter (22881): logs:      
I/flutter (22881): logs:cpb: 
I/flutter (22881): logs:bitrate max/min/avg: 0/0/200000 buffer size: 0 
I/flutter (22881): logs:vbv_delay: N/A
I/flutter (22881): logs:
I/flutter (22881): logs:      
I/flutter (22881): logs:displaymatrix: rotation of -0.00 degrees
I/flutter (22881): logs:
I/flutter (22881): logs:frame=    1 fps=0.0 q=3.4 size=       0kB time=00:00:00.00 bitrate=5415.4kbits/s speed=32.5x    
I/flutter (22881): logs:frame=    2 fps=0.0 q=2.0 size=       0kB time=00:00:00.03 bitrate=  10.5kbits/s speed=0.0475x    
I/flutter (22881): logs:frame=    9 fps=6.8 q=10.9 size=     256kB time=00:00:00.26 bitrate=7863.7kbits/s dup=5 drop=0 speed=0.202x    
I/flutter (22881): logs:frame=   13 fps=6.6 q=22.7 size=     512kB time=00:00:00.40 bitrate=10484.9kbits/s dup=7 drop=0 speed=0.203x    
I/flutter (22881): logs:frame=   28 fps=8.4 q=31.0 size=     512kB time=00:00:00.90 bitrate=4660.4kbits/s dup=20 drop=0 speed=0.269x    
I/flutter (22881): logs:frame=   55 fps= 11 q=31.0 size=    1024kB time=00:00:01.80 bitrate=4660.4kbits/s dup=45 drop=0 speed=0.368x    
I/flutter (22881): logs:frame=   60 fps=9.8 q=31.0 size=    1280kB time=00:00:01.96 bitrate=5331.7kbits/s dup=49 drop=0 speed=0.321x    
I/flutter (22881): logs:frame=   73 fps=9.4 q=31.0 Lsize=    1500kB time=00:00:02.40 bitrate=5121.4kbits/s dup=61 drop=0 speed=0.309x    
I/flutter (22881): logs:video:1499kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.079011%
I/flutter (22881): logs:frame=   73 fps=9.4 q=31.0 Lsize=N/A time=00:00:02.40 bitrate=N/A dup=61 drop=0 speed=0.309x    
I/flutter (22881): logs:video:1499kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
I/flutter (22881): logs:[android_camera @ 0x7450bb2f80] Android camera capture session was closed.
I/flutter (22881): logs:Exiting normally, received signal 2.
I/flutter (22881): output:ffmpeg version n5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
I/flutter (22881):   built with Android (7155654, based on r399163b1) clang version 11.0.5 (https://android.googlesource.com/toolchain/llvm-project 87f1315dfbea7c137aa2e6d362dbb457e388158d)
I/flutter (22881):   configuration: --cross-prefix=aarch64-linux-android- --sysroot=/files/android-sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/ffmpeg-kit/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --target-os=android --enable-neon --enable-asm --enable-inline-asm --ar=aarch64-linux-android-ar --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --ranlib=aarch64-linux-android-ranlib --strip=aarch64-linux-android-strip --nm=aarch64-linux-android-nm --extra-libs='-L/home/taner/Projects/ffmpeg-kit/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --disable-autodetect --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-s
I/flutter (22881): failStackTrace:null
I/flutter (22881): result code:255


    


  • FFMPEG hangs (sometimes) when trying to take a photo from USB camera ?

    13 mai 2022, par dezman

    I am attempting to write a script that takes a photo every 3 seconds from camera source "1", the -pix_fmt I think is unique to my USB camera.

    


    Here is the script :

    


    #!/bin/bash

set -e

while :
do
  nice_num=$(date +%s)
  
  ffmpeg -ss 00:00:00 -f avfoundation -pix_fmt yuyv422 -r 30.000030 -i "1" -t 1 -frames:v 1 -q:v 2 "image_$nice_num_%03d.jpg"
  
  wait

  sleep 3
done


    


    The issue is half the time it successfully takes the photo, and half the time it just hangs forever echoing this (not useful) :

    


    ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.1.6 (clang-1316.0.21.2)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/5.0.1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100


    


    Then I CTRL-C 3 times and get :

    


    ^C^C^CReceived > 3 system signals, hard exiting


    


    Other methods of "taking a photo every n seconds from bash" are also appreciated.

    


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