I am writing an application using libavcodec to decode content (which is also using libavformat to demux). If the platform supports it, I want to use a hardware decoder if possible, but avcodec_find_decoder always returns the software decoder.
For example, when decoding h264, on Linux I want to use the "h264_cuvid" decoder, on Mac/iOS I want to use the "h264" decoder with the AV_HWDEVICE_TYPE_VIDEOTOOLBOX hwaccel, on others I want to use the normal "h264" software decoder. I can use av_hwdevice_iterate_types to find the first hwaccel for the system; but that may not support the current codec, while another might (if there are multiple). Also, it doesn't allow me to get "h264_cuvid" on Linux. I also tried using the codec name as a prefix (i.e. looking for any supported codec that starts with "h264_"). But this doesn't work with "aac" since there is "aac_latm". I also can't use the hwdevice name since that would be "cuda" on Linux, not "cuvid". I want to avoid hard-coding any of these mappings or using hacky string manipulation that depends on the name of the codec. Is there a way to get a hardware codec for some codec ID/name? Is there a way to detect if a given hwdevice supports some codec (e.g. does videotoolbox support "vp9")? _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
