refactor(probe): read ffprobe fields without sed

Replace three separate `printf | sed` pipelines with a single grouped
`read` block fed from the existing ffprobe output.

This keeps codec, pixel format, and frame-rate parsing together, avoids
extra subprocesses, and makes the field order easier to see at the call
site.

No runtime behavior is intended to change.

1 files changed, 5 insertions, 4 deletions

diff --git a/transcode.sh b/transcode.sh
index e333200..ea61fda 100755
--- a/transcode.sh
+++ b/transcode.sh
@@ -1251,12 +1251,13 @@ encode_one() {
 
   local input_codec input_pixel_format input_frame_rate input_fps
 
-  input_codec=$(printf '%s\n' "$probe_out" | sed -n '1p')
+  {
+    IFS= read -r input_codec
+    IFS= read -r input_pixel_format
+    IFS= read -r input_frame_rate
+  } <<<"$probe_out"
   debug "Input codec:" "$input_codec"
 
-  input_pixel_format=$(printf '%s\n' "$probe_out" | sed -n '2p')
-  input_frame_rate=$(printf "%s\n" "$probe_out" | sed -n '3p')
-
   if [[ -z "$input_codec" ]]; then
     ((_REPORT_ENCODING_FAILED++))
     append_size_report_row "failed" "$filename" "$(filesize "$input_file")"