Differences

This shows you the differences between two versions of the page.

--- ffmpeg:only_keep_english [2023/10/30 16:51] – peter
+++ ffmpeg:only_keep_english [2023/10/30 17:13] (current) – [ffmpeg - Only keep English] peter
@@ Line 2: / Line 2: @@
 <code bash>
+ffmpeg -i "input.mkv" -c copy -map 0:v -map 0:a:m:language:eng? -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
 ffmpeg -i "input.mkv" -map 0:v -map 0:a:m:language:eng? -c copy -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
 or
-fmpeg -i "input.mkv" -map 0:0 -map 0:a:m:language:eng? -c copy -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
+ffmpeg -i "input.mkv" -map 0:0 -map 0:a:m:language:eng? -c copy -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
+ffmpeg -i "input.mkv" -c copy -map 0:v -map 0:a:m:language:eng? -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
 </code>
@@ Line 12: / Line 14: @@
 **NOTE:**
+  * **-c:s copy**:  Using stream copy to remux (no encoding).
   * **-map 0:v**:  Keep the existing Video.
     * **-map 0:0**:  Keep the existing map 0:0.  (Assume this is the Video).
-  * **-map 0:a:m:language:eng? -c copy**:  Keep only English Audio. (Optional only if Audio exists).
+  * **-map 0:a:m:language:eng?**:  Keep only English Audio. (Optional only if Audio exists).
-  * **-c:s copy -map 0:s:m:language:eng?**:  Keep only English Subtitles. (Optional only if Subtitles exist).
+  * **-map 0:s:m:language:eng?**:  Keep only English Subtitles. (Optional only if Subtitles exist).
   * **-map 0:d?**:  Keep Data. (Optional only if Data exists).
   * **-map 0:t?**:  Keep Attachments. (Optional only if Attachments exists).
@@ Line 24: / Line 27: @@
 <code bash>
+# QUICK.
+ffmpeg -i "input.mkv" -c copy -map 0:v -map 0:a:m:language:eng? -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "out1.mkv"
+# SLOW, BUT SLIGHTLY SMALLER.
 ffmpeg -i "input.mkv" -c:v copy -map 0:v -map 0:a:m:language:eng? -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
+# VERY SLOW, BUT SMALLER.
+ffmpeg -i "input.mkv" -map 0:v -c:a copy -map 0:a:m:language:eng? -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
-# VERY SLOW, BUT SMALLER
+# EXTREMELY SLOW, BUT SMALLEST.
+ffmpeg -i "input.mkv" -map 0:v -map 0:a:m:language:eng? -c:s copy -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"
 ffmpeg -i "input.mkv" -map 0:v -map 0:a:m:language:eng? -map 0:s:m:language:eng? -map 0:d? -map 0:t? "output.mkv"