shithub: nvi

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leave empty files if no audio (or video) stream is available

--- a/nvi.c

+++ b/nvi.c

@@ -137,17 +137,17 @@

 		if(oa != nil){

 			if((afd = open(oa, OWRITE|OTRUNC)) < 0 && (afd = create(oa, OWRITE|OTRUNC, 0644)) < 0)

 				sysfatal("%r");

-			if(hget(fa->url, afd) < 0)

+			if(fa != nil && ++i && hget(fa->url, afd) < 0)

 				sysfatal("%r");

-			i++;

 		}

 		if(ov != nil){

 			if((vfd = open(ov, OWRITE|OTRUNC)) < 0 && (vfd = create(ov, OWRITE|OTRUNC, 0644)) < 0)

 				sysfatal("%r");

-			if(hget(fv->url, vfd) < 0)

+			if(fv != nil && ++i && hget(fv->url, vfd) < 0)

 				sysfatal("%r");

-			i++;

 		}

+		if(i == 0)

+			sysfatal("no streams found");

 		while(i-- > 0)

 			procwait();