Hi Christian,
Thanx for your reply. In fact I have a small
code which is making and encoding a sample YUV frames into MPEG2 ES.
now I want that encoded stream into TS and send as UDP. So please help
me in a simple example. In the down code FRAMED comment is there,
where I want to convert it in TS.
void video_encode_example(const char *filename)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int i, out_size, size, x, y, outbuf_size;
FILE *f;
AVFrame *picture;
uint8_t *outbuf, *picture_buf;
printf("Video encoding\n");
/* find the mpeg1 video encoder */
codec = avcodec_find_encoder(CODEC_ID_MPEG1VIDEO);
if (!codec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
c= avcodec_alloc_context();
picture= avcodec_alloc_frame();
/* put sample parameters */
c->bit_rate = 400000;
/* resolution must be a multiple of two */
c->width = 352;
c->height = 288;
/* frames per second */
c->time_base= (AVRational){1,25};
c->gop_size = 10; /* emit one intra frame every ten frames */
c->max_b_frames=1;
c->pix_fmt = PIX_FMT_YUV420P;
//c->pix_fmt = PIX_FMT_RGB24
/* open it */
if (avcodec_open(c, codec) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
f = fopen(filename, "wb");
if (!f) {
fprintf(stderr, "could not open %s\n", filename);
exit(1);
}
/* alloc image and output buffer */
outbuf_size = 100000;
outbuf = (uint8_t*)malloc(outbuf_size);
size = c->width * c->height;
picture_buf = (uint8_t*)malloc((size * 3) / 2); /* size for YUV 420 */
picture->data[0] = picture_buf;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size / 4;
picture->linesize[0] = c->width;
picture->linesize[1] = c->width / 2;
picture->linesize[2] = c->width / 2;
/* encode 1 second of video */
for(i=0;i<25;i++) {
fflush(stdout);
/* prepare a dummy image */
/* Y */
for(y=0;y<c->height;y++) {
for(x=0;x<c->width;x++) {
picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
}
}
/* Cb and Cr */
for(y=0;y<c->height/2;y++) {
for(x=0;x<c->width/2;x++) {
picture->data[1][y * picture->linesize[1] + x] = 128 +
y + i * 2;
picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
}
}
/* encode the image */
out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
printf("encoding frame %3d (size=%5d)\n", i, out_size);
fwrite(outbuf, 1, out_size, f);
}
/* get the delayed frames */
for(; out_size; i++) {
fflush(stdout);
out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////// HERE I WANT TO CONVERT THE OUTBUF ////////////////
//////////// CONTENT INTO TS.
//////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
fwrite(outbuf, 1, out_size, f);
}
/* add sequence end code to have a real mpeg file */
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, f);
fclose(f);
free(picture_buf);
free(outbuf);
avcodec_close(c);
av_free(c);
av_free(picture);
printf("\n");
}
Thanks and regards.
Bikramjeet Singh.
On 1/8/10, Christian Cier-Zniewski <[email protected]> wrote:
> Hi,
>
> Bikramjeet Singh wrote:
>> Hi,
>> I am new to ffmpeg library. I am making a application in which I
>> have a mpeg2 content in buffer and It is to be transmits on a Multicast IP
>> while encoding it into TS packets. I have gone through the file
>> "mpegtsenc.c". I think it is for the same purpose. But I am not getting,
>> how
>> to use this in my application. Please anyone HELP.
>>
>>
>
> The following code examples helped me to use ffmpeg/libavformat for
> remultiplexing MPEG2 into MPEG2-TS. The second example shows how to use
> the ByteIOContext to provide your own I/O routines, just in case you
> want to use your own ones.
>
> Remultiplex MPEG TS to MPEG PS:
> http://lists.mplayerhq.hu/pipermail/libav-user/2008-September/001277.html
>
> Encoding H.264 and AAC audio into MPEG2 TS.:
> http://lists.mplayerhq.hu/pipermail/libav-user/2009-May/003034.html
>
> Also have a look in the libavformat directory. There is a file named
> "output-example.c".
>
> Christian
>
> _______________________________________________
> libav-user mailing list
> [email protected]
> https://lists.mplayerhq.hu/mailman/listinfo/libav-user
>
--
Thanks and Regards
Bikramjeet singh
Logic Eastern India Private Limited
B-2, Sec- 31, Noida
http: www.logiceastern.com
Phone: +0120-2455112
ext: 212
Mobile +919971030527
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