AVCODEC_OPEN and AVCODEC_ENCODE_VIDEO fails...

gmallax

Hi all, I am working on transcoding using ffmeg.Im having the mpeg4 video and alaw audio which should be converted to the desired video and audio format.Im reading the frame by frame conversion from my media stream using av_read_frame(...)

int main(int argc, char **argv)
{
const char *filename;
AVOutputFormat *fmt;
AVFormatContext *oc;
AVFormatContext *ic;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVStream *audio_st, *video_st;
int i,frame,video_stream;

// initialize libavcodec, and register all codecs and formats 
av\_register\_all();    
 
filename = "test.mp4";

if(av\_open\_input\_file(&ic, filename, NULL, 0, NULL)!=0) 
	return -1;	// Couldn't open file 

// Retrieve stream information
if(av\_find\_stream\_info(ic)<0) 
	return -1; // Couldn't find stream information 

// Find the first video stream 
video\_stream=-1; 
for(i=0; i<10; i++) 
if(ic->streams\[i\]->codec->codec\_type==CODEC\_TYPE\_VIDEO) 
{ 
	video\_stream=i; 
	break; 
}
if(video\_stream==-1) 
	return -1; // Didn't find a video stream 

// Get a pointer to the codec context for the video stream 
pCodecCtx=ic->streams\[video\_stream\]->codec; 

// Find the decoder for the video stream 
pCodec=avcodec\_find\_decoder(pCodecCtx->codec\_id); 
if(pCodec==NULL) return -1; // Codec not found 

// Open codec 
if(avcodec\_open(pCodecCtx, pCodec)<0) return -1; // Could not open codec 

// Allocate frames
AVPacket    pkt;
AVFrame videoFrame;

// auto detect the output format from the name. default is mpeg. 
fmt = guess\_format(NULL, filename, NULL);
if (!fmt) {
    printf("Could not deduce output format from file extension: using MPEG.\\n");
    fmt = guess\_format("mpeg", NULL, NULL);
}
if (!fmt) {
    fprintf(stderr, "Could not find suitable output format\\n");
    exit(1);
}

/\* allocate the output media context \*/
oc = av\_alloc\_format\_context();
if (!oc) {
    fprintf(stderr, "Memory error\\n");
    exit(1);
}
oc->oformat = fmt;
\_snprintf(oc->filename, sizeof(oc->filename), "%s", filename);

// Add video stream
AVStream\* stream = av\_new\_stream(oc, 0);
AVCodecContext\* videoEncoderContext = stream->codec;
setupVideoEncode(videoEncoderContext);
stream->sample\_aspect\_ratio = av\_d2q(1, 255);
stream->pts\_wrap\_bits = 33;
stream->codec->thread\_count = 0;

// Set output parameters
if (av\_set

EmoBemo

Try calling

avcodec_init();
avcodec_register_all();

near av_register_all();

gmallax

hi I have solved that by assigning correct parameters...(In setupVideoEncode(videoEncoderContext)). But now im getting crash in av_write_frame(..)inside that loop. :(( pls help me..