chore(avhw): clean up debug tracing in VA-API pipeline

src/avhw.rs

@@ -158,7 +158,6 @@ impl EncState {
         );
         // 1. VAAPI device
         let hw_device_ctx = AvHwDevCtx::new_vaapi(drm_device)?;
-        tracing::debug!("EncState::new: VAAPI device created");
 
         // 2. Frame context for capture (XRGB/RGBZ)
         let frames_rgb =
@@ -166,7 +165,6 @@ impl EncState {
 
         // 3. Filter graph — must be built BEFORE encoder config so we can derive
         //    hw_frames_ctx from the buffersink output (correct surface pool dimensions).
-        tracing::debug!("EncState::new: building filter graph...");
         let video_filter = build_filter_graph(
             &hw_device_ctx,
             &frames_rgb,
@@ -248,12 +246,10 @@ impl EncState {
         }
 
         // 5. Open encoder. Video::open() returns Encoder(Video); .0 extracts the Video.
-        tracing::debug!("EncState::new: opening encoder...");
         let opened = enc
             .open()
             .map_err(|e| anyhow::anyhow!("Failed to open h264_vaapi encoder: {e}"))?;
         let enc_video = opened.0;
-        tracing::debug!("EncState::new: encoder opened");
 
         // 6. Muxer setup (strict order)
         let output_cstr = CString::new(output_path.to_str().unwrap())?;
@@ -490,8 +486,6 @@ fn build_filter_graph(
     let scale_vaapi = ff::filter::find("scale_vaapi")
         .ok_or_else(|| anyhow::anyhow!("filter 'scale_vaapi' not found"))?;
 
-    tracing::debug!("filter_graph: filters found");
-
     // buffersrc — use AVBufferSrcParameters to set hw_frames_ctx properly
     let args = format!(
         "video_size={}x{}:pix_fmt={}:time_base=1/{fps}:pixel_aspect=1/1",
@@ -500,7 +494,6 @@ fn build_filter_graph(
         Into::<ffi::AVPixelFormat>::into(ff::format::Pixel::VAAPI) as i32,
     );
     let mut src_ctx = graph.add(&buffersrc, "in", &args)?;
-    tracing::debug!("filter_graph: buffersrc added");
 
     // SAFETY: av_buffersrc_parameters_alloc allocates params for the buffersrc.
     let par = unsafe { ffi::av_buffersrc_parameters_alloc() };
@@ -533,7 +526,6 @@ fn build_filter_graph(
 
     // buffersink
     let mut sink_ctx = graph.add(&buffersink, "out", "")?;
-    tracing::debug!("filter_graph: all filters added, linking...");
 
     // Build filter chain: src -> scale -> [transpose] -> sink
     src_ctx.link(0, &mut scale_ctx, 0);
@@ -569,7 +561,6 @@ fn build_filter_graph(
     graph
         .validate()
         .map_err(|e| anyhow::anyhow!("Filter graph validation failed: {e}"))?;
-    tracing::debug!("filter_graph: graph validated");
 
     Ok(graph)
 }