diff --git a/lib/ffmpeg.sh b/lib/ffmpeg.sh
index be1855a..255f293 100644
--- a/lib/ffmpeg.sh
+++ b/lib/ffmpeg.sh
@@ -51,8 +51,8 @@ get_crop() {
     duration="$(get_duration "${file}")" || return 1
     # don't care about decimal points
     IFS='.' read -r duration _ <<<"${duration}"
-    # get crop value for first half of input
-    local timeEnc=$((duration / 20))
+    # get crop value for first tenth of input
+    local timeEnc=$((duration / 10))
     ffmpeg \
         -y \
         -hide_banner \
diff --git a/lib/install_deps.sh b/lib/install_deps.sh
index e454e26..e6c509d 100644
--- a/lib/install_deps.sh
+++ b/lib/install_deps.sh
@@ -170,15 +170,16 @@ check_for_req_pkgs() {
         if missing_cmd rustup; then
             echo_warn "installing rustup"
             curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
-            # shellcheck disable=SC2016
-            grep -q 'source "${HOME}/.cargo/env"' "${HOME}/.bashrc" ||
-                echo 'source "${HOME}/.cargo/env"' >>"${HOME}/.bashrc"
-            # shellcheck disable=SC1091
+        fi
+        if missing_cmd cargo; then
             source "${HOME}/.bashrc"
         fi
     fi
 
-    has_cmd cargo-cbuild || echo_if_fail cargo install cargo-c || return 1
+    if ! has_cmd cargo-cbuild; then
+        echo_info "installing cargo-c"
+        echo_if_fail cargo install cargo-c || return 1
+    fi
     echo_pass "cargo-c is installed"
     echo_pass "all required packages installed"