Then I try to run it through swscale like so: Uint8_t *frameBuffer = malloc(frameBytes) Īvpicture_fill((AVPicture *)outFrame, frameBuffer, PIX_FMT_YUYV422, cdcCtx->width, cdcCtx->height) Int frameBytes = avpicture_get_size(PIX_FMT_YUYV422, cdcCtx->width, cdcCtx->height) I'm a bit in over my head here, but that is how I prefer to learn. For some reason it just crashes on me now, and I don't see what might be wrong. I have had it running before and successfully wrote PPM files with PIX_FMT_ rgb24. I suspected that the pixel format isn't supported, so I wanted to try PIX_FMT_YUYV422. The problem is I'm trying to get PIX_FMT_YUYV422 to work with lib swscale, but as soon as I change the pixel format to anything other than PIX_FMT_ yuv420p it crashes with EXC_BAD_ACCESS.Īs long as I use YUV420P the program runs, allthough it doesn't display properly. It seems I have gotten the CV callbacks to work, and it gets frames which I try to put in a CVImageBufferRef that I later draw with Core Image.

I'm trying to learn to use the different ffmpeg libs with Cocoa, and I'm trying to get frames to display with help of Core Video. If it's possible, how do I set the output of FFmpeg to be in pixel format UYVY when the input is YU12? So I am concluding that the pixel format 'YU12' is not compatible with openCV while format 'UYVY' is. On both working and non working variants this is what I get: VIDEOIO ERROR: V4L2: Pixel format of incoming image is unsupported by OpenCV The issue comes when I try to use an rtsp feed, the following command works to send the feed to my loopback device:įfmpeg -rtsp_transport tcp -i -acodec rawvideo -vcodec rawvideo -f v4l2 /dev/video0Īnd I am able to view that feed with VLC (on /dev/video0) no problem, however when I feed it to my openCV app, I get the following error: Stream #0:0 -> #0:1 (flac (native) -> flac (native))Ĭur_dts is invalid (this is harmless if it occurs once at the start per stream)I am working on an openCV project, I have a stable running variant that is taking input from an HDMI capture card and using FFmpeg to output to a v4L2 loopback device (/dev/video0) my openCV project takes its input from /dev/video0. Parsing a group of options: output url out.flac. After avformat_find_stream_info() pos: 262144 bytes read:262144 seeks:0 frames:2 sample/frame number mismatch in adjacent frames marker parser used 9198 bytes (73584 bits) Before avformat_find_stream_info() pos: 11988 bytes read:32768 seeks:0 nb_streams:2 Format flac probed with size=2048 and score=100 Parsing a group of options: input url 02 - Sad But .Īpplying option ss (set the start time offset) with argument 15. matched as output url.Īpplying option v (set logging level) with argument 9. matched as input url with argument '02 - Sad But '.

matched as option 'ss' (set the start time offset) with argument '15'. matched as option 'loglevel' (set logging level) with argument '99'. matched as option 'v' (set logging level) with argument '9'. decode_frame() failedĮrror while decoding stream #0:0: Invalid data found when processing inputįfmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developersĬonfiguration: -enable-gpl -enable-version3 -enable-sdl2 -enable-fontconfig -enable-gnutls -enable-iconv -enable-libass -enable-libbluray -enable-libfreetype -enable-libmp3lame -enable-libopencore-amrnb -enable-libopencore-amrwb -enable-libopenjpeg -enable-libopus -enable-libshine -enable-libsnappy -enable-libsoxr -enable-libtheora -enable-libtwolame -enable-libvpx -enable-libwavpack -enable-libwebp -enable-libx264 -enable-libx265 -enable-libxml2 -enable-libzimg -enable-lzma -enable-zlib -enable-gmp -enable-libvidstab -enable-libvorbis -enable-libvo-amrwbenc -enable-libmysofa -enable-libspeex -enable-libxvid -enable-libaom -enable-libmfx -enable-amf -enable-ffnvcodec -enable-cuvid -enable-d3d11va -enable-nvenc -enable-nvdec -enable-dxva2 -enable-avisynth When using FFmpeg -ss with that file FLAC Uncompressed:įfmpeg -ss 15 -i '02 - Sad But ' out.flac 2> log.txt If I convert this file to FLAC level 0 it works fine. I have my music library in FLAC Uncompressed, and I have an issue with at least one file, when using it with FFmpeg -ss option, in Windows.

Ffmpeg rtsp unspecified pixel format