Hi,
I'm trying to play the sound and video of a streaming video but the
function avcodec_decode_audio4 keeps returning 0. Do you know why ??? I
also realized that i only get one frame decoded which i guess is the first.
Here are the steps I have done
void packet_queue_init(PacketQueue *q)
int packet_queue_put(PacketQueue *q, AVPacket *pkt)
int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block) { //get
AVPacketList
audio_callback(void *userdata, Uint8 *stream, int len) {
audio_decode_frame ---> returns no data
Video is oK;
Audio -> no audio
>output
Playing... video.mpeg
[mpeg @ 0x9fc9980] max_analyze_duration 5000000 reached at 5000000
Input #0, mpeg, from '-f':
Duration: 00:00:09.96, start: 1.000000, bitrate: 595 kb/s
Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 640x360 [SAR 1:1
DAR 16:9], 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc
Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, 2 channels, s16, 128 kb/s
Video Codec found :mpeg1video
Audio Codec found :mp2
Video Codec initialized !!!
Audio Codec initialized !!!
Width:640
height:360
Running on platform:Linux
Using software rendering
INFO: +++++ INIT DONE +++++
Using audio driver: pulseaudio
Packet queue initialized
Calling audiocallback
Sent data buffer:134529440
Decoding Frame
no data
no data
no data
no data
....
Video end reached and read correctly
Goodbye
> ~/workspace/test1/Release $
//Here is the function that returns no data.
int audio_decode_frame(AVCodecContext *aCodecCtx, uint8_t *audio_buf,
int buf_size) { // decode audio
printf("Decoding Frame\n");
//printf("Codec Name:%s",aCodecCtx->codec_name);
static AVPacket pkt;
static uint8_t *audio_pkt_data = NULL;
static int audio_pkt_size = 0;
int len1, data_size;
for(;;) {
while(audio_pkt_size > 0) {
data_size = buf_size;
len1 = avcodec_decode_audio4(aCodecCtx, (int16_t *)audio_buf,
&data_size, audio_pkt_data);
if(len1 < 0) {
printf("Skipping frame\n");
/* if error, skip frame */
audio_pkt_size = 0;
break;
}
audio_pkt_data += len1;
audio_pkt_size -= len1;
pkt.pts = AV_NOPTS_VALUE;
if(data_size <= 0) {
/* No data yet, get more frames */
printf("no data\n");
continue;
}
/* We have data, return it and come back for more later */
return data_size;
}
if(pkt.data)
av_free_packet(&pkt);
if(quit) {
return -1;
}
if(packet_queue_get(&audioq, &pkt, 1) < 0) {
printf("No packet\n");
return -1;
}
audio_pkt_data = pkt.data;
audio_pkt_size = pkt.size;
}
printf("End of Decoding Frame\n");
}
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