There is no sound with iFrameExtractor player - ios5

Question

I has built ffmpeg and iFrameExtractor with ios5.1 successful, But when I play the video, There is no sound
// Register all formats and codecs
avcodec_register_all();
av_register_all();
avformat_network_init();
if(avformat_open_input(&pFormatCtx, [#"http://somesite.com/test.mp4" cStringUsingEncoding:NSASCIIStringEncoding], NULL, NULL) != 0) {
av_log(NULL, AV_LOG_ERROR, "Couldn't open file\n");
goto initError;
}
The log is
[swscaler # 0xdd3000] No accelerated colorspace conversion found from
yuv420p to rgb24. 2012-10-22 20:42:47.344 iFrameExtractor[356:707]
video duration: 5102.840000 2012-10-22 20:42:47.412
iFrameExtractor[356:707] video size: 720 x 576 2012-10-22 20:42:47.454
iFrameExtractor[356:707] Application windows are expected to have a
root view
This is my configure file for ffmpeg 0.11.1:
#!/bin/tcsh -f
rm -rf compiled/*
./configure \
--cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \
--as='/usr/local/bin/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk \
--target-os=darwin \
--arch=arm \
--cpu=cortex-a8 \
--extra-cflags='-arch armv7' \
--extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk' \
--prefix=compiled/armv7 \
--enable-cross-compile \
--enable-nonfree \
--disable-armv5te \
--disable-swscale-alpha \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--enable-decoder=h264 \
--enable-decoder=svq3 \
--disable-asm \
--disable-bzlib \
--disable-gpl \
--disable-shared \
--enable-static \
--disable-mmx \
--disable-neon \
--disable-decoders \
--disable-muxers \
--disable-demuxers \
--disable-devices \
--disable-parsers \
--disable-encoders \
--enable-protocols \
--disable-filters \
--disable-bsfs \
--disable-postproc \
--disable-debug

Answer 1

There is not enough information here.
What url are you trying to open for instance?
Where there messages in the log. I know using version .11 you get a few warnings about you not including the network_init, but that wouldn't stop it from working.
Some things have changed that worked in previous versions ie. you used to be able to append ?tcp to specify ffmpeg is using tcp but now it must be done in the dictionary.
Please provide both the syslog and build logs if possilbe.
Here's an example from one of our apps
avcodec_register_all();
avdevice_register_all();
av_register_all();
avformat_network_init();
const char *filename = [url UTF8String];
NSLog(#"filename = %#" ,url);
// err = av_open_input_file(&avfContext, filename, NULL, 0, NULL);
AVDictionary *opts = 0;
if (usesTcp) {
av_dict_set(&opts, "rtsp_transport", "tcp", 0);
}
err = avformat_open_input(&avfContext, filename, NULL, &opts);
av_dict_free(&opts);
if (err) {
NSLog(#"Error: Could not open stream: %d", err);
return nil;
}
else {
NSLog(#"Opened stream");
}

Answer 2

So assuming you do have a block of code like the following what do you do with the audio, you have to use one of the audio api's to process it, audioQueues probably would be the easiest if your dealing mostly with known types.
First in your initialization get the audio info from the stream
// Retrieve stream information
if(av_find_stream_info(pFormatCtx)<0)
return ; // Couldn't find stream information
// Find the first video stream
videoStream=-1;
for(int i=0; i<pFormatCtx->nb_streams; i++) {
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)
{
videoStream=i;
}
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO)
{
audioStream=i;
NSLog(#"found audio stream");
}
}
Then later in your processing loop do something like this.
while(!frameFinished && av_read_frame(pFormatCtx, &packet)>=0) {
// Is this a packet from the video stream?
if(packet.stream_index==videoStream) {
// Decode video frame
//do something with the video.
}
if(packet.stream_index==audioStream) {
// NSLog(#"audio stream");
//do something with the audio packet, here we simply add it to a processing
queue to be handled by another thread.
[audioPacketQueueLock lock];
audioPacketQueueSize += packet.size;
[audioPacketQueue addObject:[NSMutableData dataWithBytes:&packet length:sizeof(packet)]];
[audioPacketQueueLock unlock];
To play the audio you can look at this for some examples
https://github.com/mooncatventures-group/FFPlayer-beta1/blob/master/FFAVFrames-test/AudioController.m