Usually a HW decoder is expected when user specifies a HW acceleration method via -hwaccel option, however the current implementation doesn't take HW acceleration method into account, it is possible to select a SW decoder.
For example: $> ffmpeg -hwaccel vaapi -i av1.ivf -f null - ... Stream #0:0 -> #0:0 (av1 (libdav1d) -> wrapped_avframe (native)) libdav1d is selected in this case even if vaapi is specified. After applying this patch, the native av1 decoder (with vaapi support) is selected. ... Stream #0:0 -> #0:0 (av1 (native) -> wrapped_avframe (native)) --- fftools/ffmpeg_opt.c | 44 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c index 2d9a8a2ea0..914078add9 100644 --- a/fftools/ffmpeg_opt.c +++ b/fftools/ffmpeg_opt.c @@ -804,6 +804,48 @@ static const AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVSt return avcodec_find_decoder(st->codecpar->codec_id); } +static const AVCodec *choose_decoder2(InputStream *ist, OptionsContext *o, AVFormatContext *s, AVStream *st) +{ + char *codec_name = NULL; + + MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st); + if (codec_name) { + const AVCodec *codec = find_codec_or_die(codec_name, st->codecpar->codec_type, 0); + st->codecpar->codec_id = codec->id; + if (recast_media && st->codecpar->codec_type != codec->type) + st->codecpar->codec_type = codec->type; + return codec; + } else { + if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && + ist->hwaccel_id == HWACCEL_GENERIC && + ist->hwaccel_device_type != AV_HWDEVICE_TYPE_NONE) { + const AVCodec *p; + void *i = 0; + + while ((p = av_codec_iterate(&i))) { + int j; + + if (p->id != st->codecpar->codec_id || + !av_codec_is_decoder(p) || + !avcodec_get_hw_config(p, 0)) + continue; + + for (j = 0; ;j++) { + const AVCodecHWConfig *config = avcodec_get_hw_config(p, j); + + if (!config) + break; + + if (config->device_type == ist->hwaccel_device_type) + return p; + } + } + } + + return avcodec_find_decoder(st->codecpar->codec_id); + } +} + /* Add all the streams from the given input file to the global * list of input streams. */ static void add_input_streams(OptionsContext *o, AVFormatContext *ic) @@ -932,7 +974,7 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic) ist->hwaccel_pix_fmt = AV_PIX_FMT_NONE; } - ist->dec = choose_decoder(o, ic, st); + ist->dec = choose_decoder2(ist, o, ic, st); ist->decoder_opts = filter_codec_opts(o->g->codec_opts, ist->st->codecpar->codec_id, ic, st, ist->dec); ist->reinit_filters = -1; -- 2.17.1 _______________________________________________ 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".