-
Notifications
You must be signed in to change notification settings - Fork 0
/
ffmpeg_video_encoder.cpp
267 lines (226 loc) · 8.03 KB
/
ffmpeg_video_encoder.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
#include <stdio.h>
#include <iostream>
using namespace std;
#define __STDC_CONSTANT_MACROS
#ifdef _WIN32
//Windows
extern "C"
{
#include <math.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include <libavcodec/avcodec.h>
#include <libavutil/imgutils.h>
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include <math.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include <libavcodec/avcodec.h>
#include <libavutil/imgutils.h>
#ifdef __cplusplus
};
#endif
#endif
struct Encoderinfo
{
AVFormatContext* pFormatCtx;
AVStream* video_st;
AVCodecContext* pCodecCtx;
AVPacket pkt;
uint8_t* picture_buf;
AVFrame* pFrame;
int y_size;
int framecnt;
int frameindex;
int in_w;
int in_h;
};
static int flush_encoder(AVFormatContext *fmt_ctx, unsigned int stream_index) {
int ret;
int got_frame;
AVPacket enc_pkt;
if (!(fmt_ctx->streams[stream_index]->codec->codec->capabilities &
CODEC_CAP_DELAY))
return 0;
while (1) {
enc_pkt.data = NULL;
enc_pkt.size = 0;
av_init_packet(&enc_pkt);
ret = avcodec_encode_video2 (fmt_ctx->streams[stream_index]->codec, &enc_pkt,
NULL, &got_frame);
av_frame_free(NULL);
if (ret < 0)
break;
if (!got_frame) {
ret = 0;
break;
}
printf("Flush Encoder: Succeed to encode 1 frame!\tsize:%5d\n", enc_pkt.size);
/* mux encoded frame */
ret = av_write_frame(fmt_ctx, &enc_pkt);
if (ret < 0)
break;
}
return ret;
}
struct Encoderinfo *
cv_finance_create_encoder() {
Encoderinfo *h;
h = (Encoderinfo *)malloc(sizeof( Encoderinfo));
return h;
}
int cv_finance_encoder_video_input_begin(
struct Encoderinfo* encoder_handle,
const char* filename, //where you want to store
enum AVPixelFormat pixel_format, //picture pix_format
int image_width,
int image_height
) {
if (pixel_format != AV_PIX_FMT_YUV420P)
{
//convert to YUV420P
}
AVOutputFormat* fmt;
AVCodec* pCodec;
// set Params
encoder_handle->in_w = image_width;
encoder_handle->in_h = image_height;
encoder_handle->framecnt = 0;
encoder_handle->frameindex = 0;
av_register_all();
encoder_handle->pFormatCtx = avformat_alloc_context();
//Guess Format
fmt = av_guess_format(NULL, filename, NULL);
encoder_handle->pFormatCtx->oformat = fmt;
//Open output URL
if (avio_open(&(encoder_handle->pFormatCtx->pb), filename, AVIO_FLAG_READ_WRITE) < 0) {
printf("Failed to open output file! \n");
return -1;
}
encoder_handle->video_st = avformat_new_stream(encoder_handle->pFormatCtx, 0);
encoder_handle->video_st->time_base.num = 1;
encoder_handle->video_st->time_base.den = 25;
if (encoder_handle->video_st == NULL) {
return -1;
}
encoder_handle->pCodecCtx = encoder_handle->video_st->codec;
//Must Param
encoder_handle->pCodecCtx->codec_id = fmt->video_codec;
encoder_handle->pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
encoder_handle->pCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
encoder_handle->pCodecCtx->width = encoder_handle->in_w;
encoder_handle->pCodecCtx->height = encoder_handle->in_h;
encoder_handle->pCodecCtx->time_base.num = 1;
encoder_handle->pCodecCtx->time_base.den = 25;
encoder_handle->pCodecCtx->bit_rate = 400000;
encoder_handle->pCodecCtx->gop_size = 250;
encoder_handle->pCodecCtx->qmin = 10;
encoder_handle->pCodecCtx->qmax = 50;
//Optional Param
encoder_handle->pCodecCtx->max_b_frames = 0;
//Set Option
AVDictionary *param = 0;
//H264
if (encoder_handle->pCodecCtx->codec_id == AV_CODEC_ID_H264) {
av_dict_set(¶m, "preset", "slow", 0);
av_dict_set(¶m, "tune", "zerolatency", 0);
}
//av_dump_format(encoder_handle->pFormatCtx, 0, filename, 1);
//open codec
pCodec = avcodec_find_encoder(encoder_handle->pCodecCtx->codec_id);
if (!pCodec) {
printf("Can not find encoder! \n");
return -1;
}
if (avcodec_open2(encoder_handle->pCodecCtx, pCodec, ¶m) < 0) {
printf("Failed to open encoder! \n");
return -1;
}
//initial frame
int picture_size;
encoder_handle->pFrame = av_frame_alloc();
encoder_handle->pFrame->format = encoder_handle->pCodecCtx->pix_fmt;
encoder_handle->pFrame->width = encoder_handle->pCodecCtx->width;
encoder_handle->pFrame->height = encoder_handle->pCodecCtx->height;
picture_size = avpicture_get_size(encoder_handle->pCodecCtx->pix_fmt, encoder_handle->pCodecCtx->width, encoder_handle->pCodecCtx->height);
encoder_handle->picture_buf = (uint8_t *)av_malloc(picture_size);
av_image_alloc(encoder_handle->pFrame->data, encoder_handle->pFrame->linesize, encoder_handle->pCodecCtx->width, encoder_handle->pCodecCtx->height, encoder_handle->pCodecCtx->pix_fmt, 1);
//Write File Header
avformat_write_header(encoder_handle->pFormatCtx, NULL);
av_new_packet(&encoder_handle->pkt, picture_size);
encoder_handle->y_size = encoder_handle->pCodecCtx->width * encoder_handle->pCodecCtx->height;
return 0;
}
int cv_finance_encoder_video_input_frame(
struct Encoderinfo* encoder_handle
) {
//read YUV
encoder_handle->pFrame->data[0] = encoder_handle->picture_buf; // Y
encoder_handle->pFrame->data[1] = encoder_handle->picture_buf + encoder_handle->y_size; // U
encoder_handle->pFrame->data[2] = encoder_handle->picture_buf + encoder_handle->y_size * 5 / 4; // V
//PTS
encoder_handle->pFrame->pts = encoder_handle->frameindex;
int got_picture = 0;
//Encode
int ret = avcodec_encode_video2(encoder_handle->pCodecCtx, &encoder_handle->pkt, encoder_handle->pFrame, &got_picture);
if (ret < 0) {
printf("Failed to encode! \n");
return -1;
}
if (got_picture == 1) {
printf("Succeed to encode frame: %5d\tsize:%5d\n", encoder_handle->framecnt, (encoder_handle->pkt).size);
encoder_handle->framecnt++;
encoder_handle->pkt.stream_index = encoder_handle->video_st->index;
ret = av_write_frame(encoder_handle->pFormatCtx, &encoder_handle->pkt);
av_packet_unref(&encoder_handle->pkt);
}
encoder_handle->frameindex++;
return 0;
}
int cv_finance_encoder_video_input_end(
struct Encoderinfo* encoder_handle
) {
//handle delay
int ret = flush_encoder(encoder_handle->pFormatCtx, 0);
if (ret < 0) {
printf("Flushing encoder failed\n");
return -1;
}
//Write file trailer
av_write_trailer(encoder_handle->pFormatCtx);
//Clean
if (encoder_handle->video_st) {
avcodec_close(encoder_handle->video_st->codec);
av_free(encoder_handle->pFrame);
// av_free(encoder_handle->picture_buf);
}
avio_close(encoder_handle->pFormatCtx->pb);
avformat_free_context(encoder_handle->pFormatCtx);
return 0;
}
int main() {
FILE *in_file = fopen("/Users/yangyixin/Documents/yuv_test/aki_352x288.yuv", "rb");
int in_w = 352;
int in_h = 288;
AVPixelFormat format = AV_PIX_FMT_YUV420P;
struct Encoderinfo * h = cv_finance_create_encoder();
cv_finance_encoder_video_input_begin(h, "/Users/yangyixin/Documents/yuv_test/aki_352x288.h264", format, in_w, in_h);
while (1) {
if (fread(h->picture_buf, 1, h -> y_size * 3 / 2, in_file) <= 0) {
printf("Failed to read raw data! \n");
break;
}else if (feof(in_file)) {
printf("test");
break;
}
cv_finance_encoder_video_input_frame(h);
}
cv_finance_encoder_video_input_end(h);
return 0;
}