diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/main.cpp | 104 |
1 files changed, 69 insertions, 35 deletions
diff --git a/src/main.cpp b/src/main.cpp index 4a470b4..682b896 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -97,6 +97,8 @@ struct WindowPixmap { }; enum class VideoQuality { + MEDIUM, + HIGH, VERY_HIGH, ULTRA }; @@ -587,9 +589,8 @@ static AVCodecContext* create_audio_codec_context(AVFormatContext *av_format_con codec_context->framerate.num = fps; codec_context->framerate.den = 1; - // Some formats want stream headers to be seperate - if (av_format_context->oformat->flags & AVFMT_GLOBALHEADER) - av_format_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; + av_format_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; + codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; return codec_context; } @@ -597,7 +598,7 @@ static AVCodecContext* create_audio_codec_context(AVFormatContext *av_format_con static AVCodecContext *create_video_codec_context(AVFormatContext *av_format_context, VideoQuality video_quality, int record_width, int record_height, - int fps, VideoCodec video_codec) { + int fps, VideoCodec video_codec, bool is_livestream) { const AVCodec *codec = avcodec_find_encoder_by_name(video_codec == VideoCodec::H265 ? "hevc_nvenc" : "h264_nvenc"); if (!codec) { codec = avcodec_find_encoder_by_name(video_codec == VideoCodec::H265 ? "nvenc_hevc" : "nvenc_h264"); @@ -617,7 +618,6 @@ static AVCodecContext *create_video_codec_context(AVFormatContext *av_format_con codec_context->codec_id = codec->id; codec_context->width = record_width & ~1; codec_context->height = record_height & ~1; - codec_context->bit_rate = 12500000 + (codec_context->width * codec_context->height) / 2; // Timebase: This is the fundamental unit of time (in seconds) in terms // of which frame timestamps are represented. For fixed-fps content, // timebase should be 1/framerate and timestamp increments should be @@ -629,16 +629,23 @@ static AVCodecContext *create_video_codec_context(AVFormatContext *av_format_con codec_context->sample_aspect_ratio.num = 0; codec_context->sample_aspect_ratio.den = 0; // High values reeduce file size but increases time it takes to seek - codec_context->gop_size = fps * 2; - //codec_context->keyint_min = fps * 20; + if(is_livestream) { + codec_context->flags |= (AV_CODEC_FLAG_CLOSED_GOP | AV_CODEC_FLAG_LOW_DELAY); + codec_context->flags2 |= AV_CODEC_FLAG2_FAST; + codec_context->gop_size = fps * 2; + //codec_context->gop_size = std::numeric_limits<int>::max(); + //codec_context->keyint_min = std::numeric_limits<int>::max(); + } else { + codec_context->gop_size = fps * 2; + } codec_context->max_b_frames = 0; codec_context->pix_fmt = AV_PIX_FMT_CUDA; codec_context->color_range = AVCOL_RANGE_JPEG; if(video_codec == VideoCodec::H265) codec_context->codec_tag = MKTAG('h', 'v', 'c', '1'); switch(video_quality) { - case VideoQuality::VERY_HIGH: - codec_context->bit_rate = 10000000 + (codec_context->width * codec_context->height) / 2; + case VideoQuality::MEDIUM: + codec_context->bit_rate = 5000000 + (codec_context->width * codec_context->height) / 2; /* if(use_hevc) { codec_context->qmin = 20; @@ -653,20 +660,14 @@ static AVCodecContext *create_video_codec_context(AVFormatContext *av_format_con //codec_context->profile = FF_PROFILE_H264_HIGH; //av_opt_set(codec_context->priv_data, "preset", "p4", 0); break; + case VideoQuality::HIGH: + codec_context->bit_rate = 8000000 + (codec_context->width * codec_context->height) / 2; + break; + case VideoQuality::VERY_HIGH: + codec_context->bit_rate = 10000000 + (codec_context->width * codec_context->height) / 2; + break; case VideoQuality::ULTRA: - /* - if(use_hevc) { - codec_context->qmin = 17; - codec_context->qmax = 30; - } else { - codec_context->qmin = 5; - codec_context->qmax = 15; - } - */ - //av_opt_set(codec_context->priv_data, "preset", "slow", 0); - //av_opt_set(codec_context->priv_data, "profile", "high", 0); - //codec_context->profile = FF_PROFILE_H264_HIGH; - //av_opt_set(codec_context->priv_data, "preset", "p5", 0); + codec_context->bit_rate = 12500000 + (codec_context->width * codec_context->height) / 2; break; } //codec_context->profile = FF_PROFILE_H264_MAIN; @@ -692,9 +693,12 @@ static AVCodecContext *create_video_codec_context(AVFormatContext *av_format_con codec_context->bit_rate = 0; #endif - // Some formats want stream headers to be seperate - if (av_format_context->oformat->flags & AVFMT_GLOBALHEADER) - av_format_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; + codec_context->rc_max_rate = codec_context->bit_rate; + codec_context->rc_min_rate = codec_context->bit_rate; + codec_context->rc_buffer_size = codec_context->bit_rate / 10; + + av_format_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; + codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; return codec_context; } @@ -743,7 +747,7 @@ static AVBufferRef* dummy_hw_frame_init(size_t size) { static void open_video(AVCodecContext *codec_context, WindowPixmap &window_pixmap, AVBufferRef **device_ctx, - CUgraphicsResource *cuda_graphics_resource, CUcontext cuda_context, bool use_nvfbc, VideoQuality video_quality) { + CUgraphicsResource *cuda_graphics_resource, CUcontext cuda_context, bool use_nvfbc, VideoQuality video_quality, bool is_livestream) { int ret; *device_ctx = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA); @@ -791,6 +795,14 @@ static void open_video(AVCodecContext *codec_context, AVDictionary *options = nullptr; switch(video_quality) { + case VideoQuality::MEDIUM: + av_dict_set_int(&options, "qp", 36, 0); + //av_dict_set(&options, "preset", "hq", 0); + break; + case VideoQuality::HIGH: + av_dict_set_int(&options, "qp", 31, 0); + //av_dict_set(&options, "preset", "hq", 0); + break; case VideoQuality::VERY_HIGH: av_dict_set_int(&options, "qp", 28, 0); //av_dict_set(&options, "preset", "hq", 0); @@ -801,6 +813,13 @@ static void open_video(AVCodecContext *codec_context, break; } + if(is_livestream) { + av_dict_set_int(&options, "zerolatency", 1, 0); + av_dict_set(&options, "preset", "llhq", 0); + } + + av_opt_set(&options, "rc", "vbr", 0); + ret = avcodec_open2(codec_context, codec_context->codec, &options); if (ret < 0) { fprintf(stderr, "Error: Could not open video codec: %s\n", @@ -844,7 +863,7 @@ static void usage() { fprintf(stderr, " -c Container format for output file, for example mp4, or flv.\n"); fprintf(stderr, " -f Framerate to record at.\n"); fprintf(stderr, " -a Audio device to record from (pulse audio device). Can be specified multiple times. Each time this is specified a new audio track is added for the specified audio device. A name can be given to the audio input device by prefixing the audio input with <name>/, for example \"dummy/alsa_output.pci-0000_00_1b.0.analog-stereo.monitor\". Optional, no audio track is added by default.\n"); - fprintf(stderr, " -q Video quality. Should be either 'very_high' or 'ultra'. 'very_high' is the recommended, especially when live streaming or when you have a slower harddrive. Optional, set to 'very_high' be default.\n"); + fprintf(stderr, " -q Video quality. Should be either 'medium', 'high', 'very_high' or 'ultra'. 'high' is the recommended option when live streaming or when you have a slower harddrive. Optional, set to 'very_high' be default.\n"); fprintf(stderr, " -r Replay buffer size in seconds. If this is set, then only the last seconds as set by this option will be stored" " and the video will only be saved when the gpu-screen-recorder is closed. This feature is similar to Nvidia's instant replay feature." " This option has be between 5 and 1200. Note that the replay buffer size will not always be precise, because of keyframes. Optional, disabled by default.\n"); @@ -993,8 +1012,7 @@ static void save_replay_async(AVCodecContext *video_codec_context, int video_str avformat_alloc_output_context2(&av_format_context, nullptr, container_format.c_str(), nullptr); av_format_context->flags |= AVFMT_FLAG_GENPTS; - if (av_format_context->oformat->flags & AVFMT_GLOBALHEADER) - av_format_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; + av_format_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; AVStream *video_stream = create_stream(av_format_context, video_codec_context); avcodec_parameters_from_context(video_stream->codecpar, video_codec_context); @@ -1068,6 +1086,17 @@ static AudioInput parse_audio_input_arg(const char *str) { return audio_input; } +// TODO: Does this match all livestreaming cases? +static bool is_livestream_path(const char *str) { + const int len = strlen(str); + if((len >= 7 && memcmp(str, "http://", 7) == 0) || (len >= 8 && memcmp(str, "https://", 8) == 0)) + return true; + else if((len >= 7 && memcmp(str, "rtmp://", 7) == 0) || (len >= 8 && memcmp(str, "rtmps://", 8) == 0)) + return true; + else + return false; +} + int main(int argc, char **argv) { signal(SIGTERM, term_handler); signal(SIGINT, int_handler); @@ -1181,14 +1210,17 @@ int main(int argc, char **argv) { if(!quality_str) quality_str = "very_high"; - // medium and high exist for backwards compatibility VideoQuality quality; - if(strcmp(quality_str, "medium") == 0 || strcmp(quality_str, "very_high") == 0) { + if(strcmp(quality_str, "medium") == 0) { + quality = VideoQuality::MEDIUM; + } else if(strcmp(quality_str, "high") == 0) { + quality = VideoQuality::HIGH; + } else if(strcmp(quality_str, "very_high") == 0) { quality = VideoQuality::VERY_HIGH; - } else if(strcmp(quality_str, "high") == 0 || strcmp(quality_str, "ultra") == 0) { + } else if(strcmp(quality_str, "ultra") == 0) { quality = VideoQuality::ULTRA; } else { - fprintf(stderr, "Error: -q should either be either 'very_high' or 'ultra', got: '%s'\n", quality_str); + fprintf(stderr, "Error: -q should either be either 'medium', 'high', 'very_high' or 'ultra', got: '%s'\n", quality_str); usage(); } @@ -1399,6 +1431,8 @@ int main(int argc, char **argv) { av_format_context->flags |= AVFMT_FLAG_GENPTS; const AVOutputFormat *output_format = av_format_context->oformat; + const bool is_livestream = is_livestream_path(filename); + //bool use_hevc = strcmp(window_str, "screen") == 0 || strcmp(window_str, "screen-direct") == 0; if(video_codec != VideoCodec::H264 && strcmp(container_format, "flv") == 0) { video_codec = VideoCodec::H264; @@ -1408,13 +1442,13 @@ int main(int argc, char **argv) { AVStream *video_stream = nullptr; std::vector<AudioTrack> audio_tracks; - AVCodecContext *video_codec_context = create_video_codec_context(av_format_context, quality, record_width, record_height, fps, video_codec); + AVCodecContext *video_codec_context = create_video_codec_context(av_format_context, quality, record_width, record_height, fps, video_codec, is_livestream); if(replay_buffer_size_secs == -1) video_stream = create_stream(av_format_context, video_codec_context); AVBufferRef *device_ctx; CUgraphicsResource cuda_graphics_resource; - open_video(video_codec_context, window_pixmap, &device_ctx, &cuda_graphics_resource, cu_ctx, !src_window_id, quality); + open_video(video_codec_context, window_pixmap, &device_ctx, &cuda_graphics_resource, cu_ctx, !src_window_id, quality, is_livestream); if(video_stream) avcodec_parameters_from_context(video_stream->codecpar, video_codec_context); |