Hi, I trying to apply "yadif_cuda,scale_cuda" filter to a transcoder
app. The problem is with the Pixel Format.
I'm using 'h264' as decoder and 'h264_nvenc' as encoder, selected CUDA
device as hardware context and this is working great, the problem is
when i "insert in the middle" the filter process.
The filter that i trying to use is
"hwupload_cuda,yadif_cuda,scale_cuda=w=100:h=100" and the code for init
filters is at the end.
One of the thing that I dont underestand well is that when you init the
filter (the "in") you must pass the pix_fmt, but the problem is, the
image is on yuv420p format, but at real the hardware decoding process
put the decoded frame with cuda format, so, how work with this 2 formats.
static int init_filters(const char *filtersDescr) {
int ret = 0;
const AVFilter *bufferSrc = avfilter_get_by_name("buffer");
const AVFilter *bufferSink = avfilter_get_by_name("buffersink");
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *inputs = avfilter_inout_alloc();
AVRational time_base = dFmtCtx->streams[videoStream]->time_base;
filterGraph = avfilter_graph_alloc();
if (!outputs || !inputs || !filterGraph) {
ret = AVERROR(ENOMEM);
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
spdlog::debug("Init filter with input format: {} {}",
dvCodecCtx->pix_fmt, dvCodecCtx->sw_pix_fmt);
char args[512];
snprintf(args, sizeof(args),
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
dvCodecCtx->width, dvCodecCtx->height, AV_PIX_FMT_CUDA,
time_base.num, time_base.den,
dvCodecCtx->sample_aspect_ratio.num,
dvCodecCtx->sample_aspect_ratio.den);
spdlog::debug("Making 'in' filter");
ret = avfilter_graph_create_filter(&bufferSrcCtx, bufferSrc, "in",
args, NULL, filterGraph);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n");
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
spdlog::debug("Making 'out' filter");
/* buffer video sink: to terminate the filter chain. */
ret = avfilter_graph_create_filter(&bufferSinkCtx, bufferSink, "out",
NULL, NULL, filterGraph);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n");
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
/* ret = av_opt_set_int_list(bufferSinkCtx, "pix_fmts", pixFmts,
AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
spdlog::error("Cannot set output pixel format");
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}*/
outputs->name = av_strdup("in");
outputs->filter_ctx = bufferSrcCtx;
outputs->pad_idx = 0;
outputs->next = NULL;
inputs->name = av_strdup("out");
inputs->filter_ctx = bufferSinkCtx;
inputs->pad_idx = 0;
inputs->next = NULL;
spdlog::debug("Parsing custom filter");
if ((ret = avfilter_graph_parse_ptr(filterGraph, filtersDescr,
&inputs, &outputs, NULL)) < 0){
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
spdlog::debug("Configuring filter graph");
if ((ret = avfilter_graph_config(filterGraph, NULL)) < 0) {
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
_______________________________________________
Libav-user mailing list
Libav-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/libav-user
To unsubscribe, visit link above, or email
libav-user-requ...@ffmpeg.org with subject "unsubscribe".
