Hi, On Wed, May 21, 2025 at 9:34 AM Timothée < timothee.informati...@regaud-chapuy.fr> wrote:
> Hello, > > I am interested in expanding ffmpeg's capabilities to extract > low-level data from video codecs. Specifically, I'd like to implement > functionality that would allow exporting frame data, macroblock > information, quantization tables, and similar codec-specific elements > to binary files for further analysis. > > After searching through the documentation and existing features, I > haven't found similar functionality, though I may have missed > something. Has this been implemented before, or are there related > features I should examine? Some older codecs implement minor variants for this, e.g. grep for AV_FRAME_DATA_MOTION_VECTORS, which attaches a frame's motion vectors to the picture data. I believe there's an example app and possibly a filter to overlay MVs on top of the video frame based on this concept. You could extend this to cover other (macro)block info. There used to be a variant of this for quant-tables also but I can't find it, maybe it was removed. Placing the side-data in binary files is probably not really something that libavcodec would do, but rather something that would exist at the application level. Ronald _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
