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agathah
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| #ifdef HAVE_AV_CONFIG_H | ||
| #undef HAVE_AV_CONFIG_H | ||
| #endif | ||
|
|
||
| #if _WIN32 | ||
| #define __STDC_CONSTANT_MACROS | ||
| #endif | ||
|
|
||
| #include <libavcodec/avcodec.h> | ||
| #include <libavformat/avformat.h> | ||
| #include <libavutil/opt.h> | ||
|
|
||
| #include <stdio.h> | ||
| #include <assert.h> | ||
| #include <string.h> | ||
|
|
||
| int main(int argc, char* argv[]) | ||
| { | ||
| char* inputfile = NULL; | ||
| char* preset = "default"; | ||
| bool zerolatency = false; | ||
|
|
||
| for(int i = 1; i < argc; i++) { | ||
| if(strcmp(argv[i], "-input") == 0) { | ||
| inputfile = argv[++i]; | ||
| } | ||
| else if(strcmp(argv[i], "-preset") == 0) { | ||
| preset = argv[++i]; | ||
| } | ||
| else if(strcmp(argv[i], "-zerolatency") == 0) { | ||
| zerolatency = true; | ||
| } | ||
| } | ||
|
|
||
| if(inputfile == NULL) { | ||
| printf("Usage: libnvenc_sample -input your.input -preset [default]/slow/fast\n"); | ||
| return 0; | ||
| } | ||
|
|
||
| //ffmpeg decoder | ||
| av_register_all(); | ||
| //init decode context | ||
| AVFormatContext *fmt_ctx = NULL; | ||
| AVCodecContext *dec_ctx = NULL; | ||
|
|
||
| if(avformat_open_input(&fmt_ctx, inputfile, NULL, NULL) < 0) | ||
| { | ||
| printf("can't open the file %s\n", inputfile); | ||
| return -1; | ||
| } | ||
|
|
||
| if(avformat_find_stream_info(fmt_ctx, NULL)<0) | ||
| { | ||
| printf("can't find suitable codec parameters\n"); | ||
| return -1; | ||
| } | ||
|
|
||
| AVStream *vst_dec; | ||
| AVCodec *dec = NULL; | ||
| int ret; | ||
| int video_stream_idx = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0); | ||
| if (video_stream_idx < 0) { | ||
| printf("Could not find video stream in input file!\n"); | ||
| return -1; | ||
| } | ||
| else { | ||
| vst_dec = fmt_ctx->streams[video_stream_idx]; | ||
|
|
||
| dec_ctx = vst_dec->codec; | ||
| dec = avcodec_find_decoder(dec_ctx->codec_id); | ||
|
|
||
| if (!dec) { | ||
| fprintf(stderr, "Failed to find %s codec\n", | ||
| av_get_media_type_string(AVMEDIA_TYPE_VIDEO)); | ||
| return -1; | ||
| } | ||
|
|
||
| if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) { | ||
| fprintf(stderr, "Failed to open %s codec\n", | ||
| av_get_media_type_string(AVMEDIA_TYPE_VIDEO)); | ||
| return -1; | ||
| } | ||
| } | ||
|
|
||
| // encode context | ||
| AVFormatContext* oc; | ||
| const char* filename = "out.mp4"; | ||
| avformat_alloc_output_context2(&oc, NULL, NULL, filename); | ||
| if (!oc) { | ||
| printf("FFMPEG: avformat_alloc_context error\n"); | ||
| return -1; | ||
| } | ||
|
|
||
| if ((ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE)) < 0) { | ||
| fprintf(stderr, "Could not open '%s'\n", filename); | ||
| return -1; | ||
| } | ||
|
|
||
| AVCodec* enc = avcodec_find_encoder_by_name("libnvenc"); | ||
| if(!enc) { | ||
| printf("Could not find libnvenc\n"); | ||
| printf("Please run ./configure --enable-libnvenc and make ffmpeg again\n"); | ||
| return -1; | ||
| } | ||
| AVStream* vst_enc = avformat_new_stream(oc, enc); | ||
| if (!vst_enc) { | ||
| printf("FFMPEG: Could not alloc video stream"); | ||
| return -1; | ||
| } | ||
|
|
||
| AVCodecContext* enc_ctx = vst_enc->codec; | ||
|
|
||
| double bitrate = (double)5000000 * (dec_ctx->width * dec_ctx->height) / (1280*720); | ||
| enc_ctx->codec_id = enc->id; | ||
| enc_ctx->codec_type = AVMEDIA_TYPE_VIDEO; | ||
| enc_ctx->width = dec_ctx->width; | ||
| enc_ctx->height = dec_ctx->height; | ||
| enc_ctx->pix_fmt = dec_ctx->pix_fmt; | ||
| enc_ctx->time_base.num = dec_ctx->time_base.num; | ||
| enc_ctx->time_base.den = dec_ctx->time_base.den/2; | ||
| enc_ctx->bit_rate = bitrate; | ||
| enc_ctx->flags |= (oc->oformat->flags & AVFMT_GLOBALHEADER) ? CODEC_FLAG_GLOBAL_HEADER : 0; | ||
| av_opt_set(enc_ctx->priv_data, "preset", preset, 0); // "fast" = HP, "slow" = HQ, default = LOW_LATENCY_DEFAULT | ||
| if(zerolatency) { | ||
| //use LOW_LATENCY preset | ||
| av_opt_set(enc_ctx->priv_data, "tune", "zerolatency", 0); | ||
| } | ||
|
|
||
| ret = avcodec_open2(enc_ctx, enc, NULL); | ||
| if (ret < 0) { | ||
| printf("could not open codec\n"); | ||
| return -1; | ||
| } | ||
| ret = avformat_write_header(oc, NULL); | ||
|
|
||
| AVPacket dec_pkt; | ||
| av_init_packet(&dec_pkt); | ||
| dec_pkt.data = NULL; | ||
| dec_pkt.size = 0; | ||
|
|
||
| AVFrame *frame = avcodec_alloc_frame(); | ||
| int got_frame = 0; | ||
| while(av_read_frame(fmt_ctx, &dec_pkt) >= 0) { | ||
| if(dec_pkt.stream_index == video_stream_idx) { | ||
| if(avcodec_decode_video2(dec_ctx, frame, &got_frame, &dec_pkt) < 0) { | ||
| printf("Error decoding frames!\n"); | ||
| return -1; | ||
| } | ||
| if(got_frame) { | ||
| AVPacket enc_pkt; | ||
| int got_pkt = 0; | ||
| av_init_packet(&enc_pkt); | ||
| enc_pkt.data = NULL; | ||
| enc_pkt.size = 0; | ||
| if(avcodec_encode_video2(vst_enc->codec, &enc_pkt, frame, &got_pkt) < 0) { | ||
| printf("Error encoding frames!\n"); | ||
| return -1; | ||
| } | ||
|
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||
| if(got_pkt) { | ||
| av_write_frame(oc, &enc_pkt); | ||
| } | ||
|
|
||
| av_free_packet(&enc_pkt); | ||
| } | ||
| } | ||
| av_free_packet(&dec_pkt); | ||
| } | ||
| avcodec_free_frame(&frame); | ||
| av_write_trailer(oc); | ||
|
|
||
| avcodec_close(dec_ctx); | ||
| avcodec_close(enc_ctx); | ||
| avformat_close_input(&fmt_ctx); | ||
|
|
||
| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| --- ffmpeg.c | ||
| +++ ffmpeg.c | ||
| @@ -2644,7 +2644,7 @@ | ||
| ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option | ||
| av_mul_q(ost->frame_aspect_ratio, (AVRational){ codec->height, codec->width }) : | ||
| ost->filter->filter->inputs[0]->sample_aspect_ratio; | ||
| - if (!strncmp(ost->enc->name, "libx264", 7) && | ||
| + if ((!strncmp(ost->enc->name, "libx264", 7) || !strncmp(ost->enc->name, "libnvenc", 8)) && | ||
| codec->pix_fmt == AV_PIX_FMT_NONE && | ||
| ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P) | ||
| av_log(NULL, AV_LOG_WARNING, |
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