- fix for black frames as per BradLarson#1255 (comment)

bigcitypix · Dec 26, 2014 · 98bff65 · 98bff65 · yumincode · Dec 29, 2015
1 parent ff357d4
commit 98bff65
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/framework/Source/iOS/GPUImageMovieWriter.m b/framework/Source/iOS/GPUImageMovieWriter.m
@@ -3,6 +3,7 @@
 #import "GPUImageContext.h"
 #import "GLProgram.h"
 #import "GPUImageFilter.h"
+static BOOL allowWriteAudio = NO;
 
 NSString *const kGPUImageColorSwizzlingFragmentShaderString = SHADER_STRING
 (
@@ -266,6 +267,7 @@ - (void)setEncodingLiveVideo:(BOOL) value
 
 - (void)startRecording;
 {
+    allowWriteAudio = NO;
     alreadyFinishedRecording = NO;
     startTime = kCMTimeInvalid;
     runSynchronouslyOnContextQueue(_movieWriterContext, ^{
@@ -362,6 +364,10 @@ - (void)finishRecordingWithCompletionHandler:(void (^)(void))handler;
 
 - (void)processAudioBuffer:(CMSampleBufferRef)audioBuffer;
 {
+
+    if (!allowWriteAudio) {
+        return;
+    }
     if (!isRecording)
     {
         return;
@@ -437,6 +443,8 @@ - (void)processAudioBuffer:(CMSampleBufferRef)audioBuffer;
             {
                 if (![assetWriterAudioInput appendSampleBuffer:audioBuffer])
                     NSLog(@"Problem appending audio buffer at time: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, currentSampleTime)));
+                allowWriteAudio = YES;
+
             }
             else
             {