Aditya Kalhan
Reputation: 43
Getting frames from CVAT image annotation
I used CVAT to annotate a video, specifically for the Yolo format. However I also want to get the frames for the video I annotated, I tried to get the frames from the VLC media player, but it is giving me 1109 frames when I had actually annotated 1541 frames in the CVAT software.
I used the following command
ffmpeg -i path/to/your/video -start_number 0 -b:v 10000k -vsync 0 -an -y -q:v 16 images/%d.jpg
but I am getting the following error :
ffmpeg version 5.1.2-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
-vsync is deprecated. Use -fps_mode
Passing a number to -vsync is deprecated, use a string argument as described in the manual.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Aditya Kalhan\Downloads\odonil.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp41isom
creation_time : 2023-08-22T16:49:13.000000Z
Duration: 00:01:02.78, start: 0.000000, bitrate: 8095 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/bt709/reserved, progressive), 1280x720 [SAR 1:1 DAR 16:9], 7886 kb/s, 29.89 fps, 30 tbr, 30k tbn (default)
Metadata:
creation_time : 2023-08-22T16:49:13.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
encoder : AVC Coding
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
creation_time : 2023-08-22T16:49:13.000000Z
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
Output #0, image2, to 'images/%d.jpg':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp41isom
encoder : Lavf59.27.100
Stream #0:0(und): Video: mjpeg, yuvj420p(pc, bt470bg/bt709/reserved, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 10000 kb/s, 30 fps, 30 tbn (default)
Metadata:
creation_time : 2023-08-22T16:49:13.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
encoder : Lavc59.37.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/10000000 buffer size: 0 vbv_delay: N/A
[image2 @ 000002024a04d440] Could not open file : images/0.jpgA speed= 0x
av_interleaved_write_frame(): I/O error
[image2 @ 000002024a04d440] Could not open file : images/0.jpg
av_interleaved_write_frame(): I/O error
[image2 @ 000002024a04d440] Could not open file : images/0.jpg
av_interleaved_write_frame(): I/O error
[image2 @ 000002024a04d440] Could not open file : images/0.jpg
av_interleaved_write_frame(): I/O error
[image2 @ 000002024a04d440] Could not open file : images/0.jpg
av_interleaved_write_frame(): I/O error
frame= 5 fps=0.0 q=16.0 Lsize=N/A time=00:00:00.16 bitrate=N/A speed= 4.8x
video:51kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!
I then used this command :
ffmpeg -i path/to/your/video -start_number 0 -b:v 10000k -vsync 0 -an -y -q:v 16 images2/frame_%06d.jpg
and got the following error :
ffmpeg version 5.1.2-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
-vsync is deprecated. Use -fps_mode
Passing a number to -vsync is deprecated, use a string argument as described in the manual.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Aditya Kalhan\Downloads\odonil.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp41isom
creation_time : 2023-08-22T16:49:13.000000Z
Duration: 00:01:02.78, start: 0.000000, bitrate: 8095 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/bt709/reserved, progressive), 1280x720 [SAR 1:1 DAR 16:9], 7886 kb/s, 29.89 fps, 30 tbr, 30k tbn (default)
Metadata:
creation_time : 2023-08-22T16:49:13.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
encoder : AVC Coding
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
creation_time : 2023-08-22T16:49:13.000000Z
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
Output #0, image2, to 'images2/frame_%06d.jpg':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp41isom
encoder : Lavf59.27.100
Stream #0:0(und): Video: mjpeg, yuvj420p(pc, bt470bg/bt709/reserved, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 10000 kb/s, 30 fps, 30 tbn (default)
Metadata:
creation_time : 2023-08-22T16:49:13.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
encoder : Lavc59.37.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/10000000 buffer size: 0 vbv_delay: N/A
[image2 @ 000001fcb198d240] Could not open file : images2/frame_000000.jpgx
av_interleaved_write_frame(): I/O error
[image2 @ 000001fcb198d240] Could not open file : images2/frame_000000.jpg
av_interleaved_write_frame(): I/O error
[image2 @ 000001fcb198d240] Could not open file : images2/frame_000000.jpg
av_interleaved_write_frame(): I/O error
[image2 @ 000001fcb198d240] Could not open file : images2/frame_000000.jpg
av_interleaved_write_frame(): I/O error
frame= 4 fps=0.0 q=16.0 Lsize=N/A time=00:00:00.13 bitrate=N/A speed=1.91x
video:41kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!
Upvotes: 1
Views: 523
Answers (1)
Jeethesh
Reputation: 49
Did you try using the Export Task Dataset drop down menu to the top right of the Task? It allows you to export annotation as well as images in different formats.
Upvotes: 0