StackOverflow2013

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PO
primarykey
Id
12563019
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-09-24T10:19:46.397
FavoriteCount
0
LastActivityDate
2014-01-20T11:07:44.847
LastEditDate
2014-01-20T11:07:44.847
LastEditorUserId
1640308
OwnerUserId
1640308
ParentId
9364693
PostTypeId
2
Score
6
ViewCount
0
LastEditorDisplayName
text
Body
<p>this code works with YUV raw images. I got segfault trying to encode an RGB raw image. but you can use <code>swscale()</code> to convert RGB to YUV</p> <pre><code>int main() { int ret; AVFrame *frame; AVPacket pkt; av_register_all(); AVCodec* codec = avcodec_find_encoder(AV_CODEC_ID_MJPEG); if (!codec) { printf("Codec not found\n"); exit(1); } AVCodecContext* c = avcodec_alloc_context3(codec); if (!c) { printf("Could not allocate video codec context\n"); exit(1); } c->bit_rate = 400000; c->width = 320; c->height = 200; c->time_base= (AVRational){1,25}; c->pix_fmt = AV_PIX_FMT_YUVJ420P; if (avcodec_open2(c, codec, NULL) < 0) { printf("Could not open codec\n"); exit(1); } frame = avcodec_alloc_frame(); if (!frame) { printf("Could not allocate video frame\n"); exit(1); } frame->format = c->pix_fmt; frame->width = c->width; frame->height = c->height; ret = av_image_alloc(frame->data, frame->linesize, c->width, c->height, c->pix_fmt, 32); if (ret < 0) { printf("Could not allocate raw picture buffer\n"); exit(1); } av_init_packet(&pkt); pkt.data = NULL; pkt.size = 0; /* prepare a dummy image */ /* Y */ for(int y=0;y<c->height;y++) { for(int x=0;x<c->width;x++) { frame->data[0][y * frame->linesize[0] + x] = x + y; } } /* Cb and Cr */ for(int y=0;y<c->height/2;y++) { for(int x=0;x<c->width/2;x++) { frame->data[1][y * frame->linesize[1] + x] = 128 + y; frame->data[2][y * frame->linesize[2] + x] = 64 + x; } } frame->pts = 1; int got_output = 0; ret = avcodec_encode_video2(c, &pkt, frame, &got_output); if (ret < 0) { printf("Error encoding frame\n"); exit(1); } if (got_output) { printf("got frame\n"); FILE* f = fopen("x.jpg", "wb"); fwrite(pkt.data, 1, pkt.size, f); av_free_packet(&pkt); } avcodec_close(c); av_free(c); av_freep(&frame->data[0]); avcodec_free_frame(&frame); printf("\n"); return 0; } </code></pre>
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1. This table or related slice is empty.
PostParentId
1. POConvert raw image buffer into JPEG using LIBAVCODEC
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1. PTAnswer
UserLastEditorUserId
1. USarash kordi
UserOwnerUserId
1. USarash kordi
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