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裁剪画面

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cxh 2026-01-06 16:58:35 +08:00
parent 5675440974
commit b98d67d590
1 changed files with 12 additions and 8 deletions
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20
src/rtmp_manager.cpp
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@ -113,12 +113,9 @@ std::string RTMPManager::make_key(const std::string& name) { return name + "_mai
GstElement* RTMPManager::create_pipeline(const Camera& cam)
{
const int out_width = cam.width;
const int out_height = cam.height;
const int fps = 30; // ⭐ 强制 30
const int bitrate = cam.bitrate; // 建议 3.5M~4.0M
const int gop = 15; // ⭐ 半秒 I 帧
const int fps = 30;
const int bitrate = cam.bitrate; // 3.5M~4M
const int gop = 15;
const std::string stream_name = cam.name;
const std::string rtmp_url = "rtmp://127.0.0.1:1935/" + stream_name;
@ -126,18 +123,25 @@ GstElement* RTMPManager::create_pipeline(const Camera& cam)
std::string pipeline_str = "v4l2src name=src device=" + cam.device +
" io-mode=dmabuf "
// 原始 4:3 输入
"! video/x-raw,format=NV12,"
"width=1280,height=960,"
"framerate=30/1 "
// ⭐ 裁成 16:9（上下各裁 120）
"! videocrop top=120 bottom=120 "
// 可选：如果你想输出非 1280x720（比如 960x540）
"! videoscale "
"! video/x-raw,"
"width=" +
std::to_string(out_width) + ",height=" + std::to_string(out_height) +
std::to_string(cam.width) + ",height=" + std::to_string(cam.height) +
" "
// 队列（建议后面再把 leaky 去掉）
"! queue max-size-buffers=2 max-size-time=0 leaky=downstream "
// 编码
"! mpph264enc "
"rc-mode=cbr "
"bps=" +
@ -147,7 +151,7 @@ GstElement* RTMPManager::create_pipeline(const Camera& cam)
std::to_string(gop) +
" "
"header-mode=each-idr "
"profile=main " // ⭐ 关键改动
"profile=main "
"! h264parse config-interval=1 "
"! video/x-h264,stream-format=avc,alignment=au "