Update README.md to talk about 5.7K (#7)

Update documentation.
Improve join-insv script.

Author: syncom

README.md

@@ -77,6 +77,21 @@ editing software).
    media player](https://www.videolan.org/) or uploaded to YouTube as a 360
    video.
 
+   For 5.7K videos, separate video files like
+   `/path/to/VID_20240528_113402_00_032.insv` and
+   `/path/to/VID_20240528_113402_10_032.insv` are generated by the camera for
+   the left-eye and right-eye views. Both files need to be supplied to the
+   `-input` argument of `MediaSDKTest`, in the aforementioned order. For
+   example,
+
+   ```bash
+   # For 5.7K video
+   MediaSDKTest \
+     -inputs VID_20240528_113402_00_032.insv VID_20240528_113402_10_032.insv \
+     -output "both_eyes.mp4" \
+     -enable_directionlock -enable_flowstate -enable_denoise
+   ```
+
 ## Utility: `join-insv`
 
 The utility `join-insv` is available in the container to automate the above
@@ -86,6 +101,12 @@ workflow. Example
 # For 4K and lower resolution
 join-insv --output /path/to/merged_360video.mp4 \
   /path/to/input-1. insv /path/to/input-2.insv ...
+
+# For 5.7K
+join-insv --output /path/to/merged_5.7k_360video.mp4 \
+  /path/to/VID_20240528_113402_00_001.insv /path/to/VID_20240528_113402_10_001.insv \
+  /path/to/VID_20240528_120003_00_002.insv /path/to/VID_20240528_120003_10_002.insv \
+  ...
 ```
 
 The synopsis of `join-insv` is as follows.

scripts/join-insv

@@ -3,7 +3,7 @@
 # Join 360-degree INSV files into a single MP4
 #
 
-set -euxo pipefail
+set -euo pipefail
 
 #######################################################
 # Self test
@@ -45,6 +45,8 @@ join_insv() {
     exit 1
   fi
 
+  self_test
+
   local is_57k=$1
   local outfile="$2"
   shift 2
@@ -134,6 +136,4 @@ cli() {
 
 }
 
-
-self_test
 cli "$@"