diff --git a/server/src/cmds/config/cameras.rs b/server/src/cmds/config/cameras.rs
index cd853ff..368df52 100644
--- a/server/src/cmds/config/cameras.rs
+++ b/server/src/cmds/config/cameras.rs
@@ -125,11 +125,14 @@ fn press_test_inner(
     username: Option<String>,
     password: Option<String>,
 ) -> Result<String, Error> {
-    let (extra_data, _stream) = stream::FFMPEG.open(stream::Source::Rtsp {
-        url,
-        username,
-        password,
-    })?;
+    let (extra_data, _stream) = stream::FFMPEG.open(
+        "test stream".to_owned(),
+        stream::Source::Rtsp {
+            url,
+            username,
+            password,
+        },
+    )?;
     Ok(format!(
         "{}x{} video stream",
         extra_data.entry.width, extra_data.entry.height
diff --git a/server/src/mp4.rs b/server/src/mp4.rs
index b508011..6a49f49 100644
--- a/server/src/mp4.rs
+++ b/server/src/mp4.rs
@@ -2256,7 +2256,10 @@ mod tests {
 
     fn copy_mp4_to_db(db: &TestDb<RealClocks>) {
         let (extra_data, mut input) = stream::FFMPEG
-            .open(stream::Source::File("src/testdata/clip.mp4"))
+            .open(
+                "test".to_owned(),
+                stream::Source::File("src/testdata/clip.mp4"),
+            )
             .unwrap();
 
         // 2015-04-26 00:00:00 UTC.
@@ -2367,10 +2370,13 @@ mod tests {
 
     fn compare_mp4s(new_filename: &str, pts_offset: i64, shorten: i64) {
         let (orig_extra_data, mut orig) = stream::FFMPEG
-            .open(stream::Source::File("src/testdata/clip.mp4"))
+            .open(
+                "test".to_owned(),
+                stream::Source::File("src/testdata/clip.mp4"),
+            )
             .unwrap();
         let (new_extra_data, mut new) = stream::FFMPEG
-            .open(stream::Source::File(new_filename))
+            .open("test".to_owned(), stream::Source::File(new_filename))
             .unwrap();
         assert_eq!(orig_extra_data, new_extra_data);
         let mut final_durations = None;
diff --git a/server/src/stream.rs b/server/src/stream.rs
index 9d8c3ea..cdaa617 100644
--- a/server/src/stream.rs
+++ b/server/src/stream.rs
@@ -75,7 +75,8 @@ pub enum Source {
 }
 
 pub trait Opener: Send + Sync {
-    fn open(&self, src: Source) -> Result<(h264::ExtraData, Box<dyn Stream>), Error>;
+    fn open(&self, label: String, src: Source)
+        -> Result<(h264::ExtraData, Box<dyn Stream>), Error>;
 }
 
 pub struct VideoFrame<'a> {
@@ -105,7 +106,11 @@ impl Ffmpeg {
 }
 
 impl Opener for Ffmpeg {
-    fn open(&self, src: Source) -> Result<(h264::ExtraData, Box<dyn Stream>), Error> {
+    fn open(
+        &self,
+        label: String,
+        src: Source,
+    ) -> Result<(h264::ExtraData, Box<dyn Stream>), Error> {
         use ffmpeg::avformat::InputFormatContext;
         let mut input = match src {
             #[cfg(test)]
@@ -123,8 +128,8 @@ impl Opener for Ffmpeg {
                 )?;
                 if !open_options.empty() {
                     warn!(
-                        "While opening URL {}, some options were not understood: {}",
-                        url, open_options
+                        "{}: While opening URL {}, some options were not understood: {}",
+                        &label, url, open_options
                     );
                 }
                 i
@@ -174,8 +179,8 @@ impl Opener for Ffmpeg {
                 )?;
                 if !open_options.empty() {
                     warn!(
-                        "While opening URL {}, some options were not understood: {}",
-                        url, open_options
+                        "{}: While opening URL {}, some options were not understood: {}",
+                        &label, url, open_options
                     );
                 }
                 i
@@ -271,7 +276,11 @@ pub struct RetinaOpener {}
 pub const RETINA: RetinaOpener = RetinaOpener {};
 
 impl Opener for RetinaOpener {
-    fn open(&self, src: Source) -> Result<(h264::ExtraData, Box<dyn Stream>), Error> {
+    fn open(
+        &self,
+        label: String,
+        src: Source,
+    ) -> Result<(h264::ExtraData, Box<dyn Stream>), Error> {
         let (startup_tx, startup_rx) = tokio::sync::oneshot::channel();
         let (frame_tx, frame_rx) = tokio::sync::mpsc::channel(1);
         let handle = tokio::runtime::Handle::current();
@@ -323,7 +332,12 @@ impl Opener for RetinaOpener {
                     Some(Ok(CodecItem::VideoFrame(v))) => {
                         deadline = tokio::time::Instant::now() + RETINA_TIMEOUT;
                         if v.loss > 0 {
-                            log::warn!("lost {} RTP packets @ {:?}", v.loss, v.start_ctx());
+                            log::warn!(
+                                "{}: lost {} RTP packets @ {:?}",
+                                &label,
+                                v.loss,
+                                v.start_ctx()
+                            );
                         }
                         if frame_tx.send(Ok(v)).await.is_err() {
                             return; // other end died.
diff --git a/server/src/streamer.rs b/server/src/streamer.rs
index 03bdb85..ee5bf69 100644
--- a/server/src/streamer.rs
+++ b/server/src/streamer.rs
@@ -109,11 +109,14 @@ where
 
         let (extra_data, mut stream) = {
             let _t = TimerGuard::new(&clocks, || format!("opening {}", self.url.as_str()));
-            self.opener.open(stream::Source::Rtsp {
-                url: self.url.clone(),
-                username: self.username.clone(),
-                password: self.password.clone(),
-            })?
+            self.opener.open(
+                self.short_name.clone(),
+                stream::Source::Rtsp {
+                    url: self.url.clone(),
+                    username: self.username.clone(),
+                    password: self.password.clone(),
+                },
+            )?
         };
         let realtime_offset = self.db.clocks().realtime() - clocks.monotonic();
         let video_sample_entry_id = {
@@ -285,6 +288,7 @@ mod tests {
     impl stream::Opener for MockOpener {
         fn open(
             &self,
+            _label: String,
             src: stream::Source,
         ) -> Result<(h264::ExtraData, Box<dyn stream::Stream>), Error> {
             match src {
@@ -337,7 +341,10 @@ mod tests {
         clocks.sleep(time::Duration::seconds(86400)); // to 2015-04-26 00:00:00 UTC
 
         let (extra_data, stream) = stream::FFMPEG
-            .open(stream::Source::File("src/testdata/clip.mp4"))
+            .open(
+                "test".to_owned(),
+                stream::Source::File("src/testdata/clip.mp4"),
+            )
             .unwrap();
         let mut stream = ProxyingStream::new(clocks.clone(), time::Duration::seconds(2), stream);
         stream.ts_offset = 123456; // starting pts of the input should be irrelevant