ffmpeg log 疑问
ffmpeg转码的时候会不断的调用print_report(0, timer_start, cur_time);函数对转码状态进行报告，如果此处传入的参数是0，说明就不会输出dup=0 drop=1509937这两选项，但是我的转码长时间跑的话跑的跑的就开始打印这两项信息了，看代码怎么也不应该打印这两项信息！！非常不解，有可能是我的代码看的不到位，请各位帮忙给看下，谢谢static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
{
char buf;
AVBPrint buf_script;
OutputStream *ost;
AVFormatContext *oc;
int64_t total_size;
AVCodecContext *enc;
int frame_number, vid, i;
double bitrate;
double speed;
int64_t pts = INT64_MIN + 1;
static int64_t last_time = -1;
static int qp_histogram;
int hours, mins, secs, us;
int ret;
float t;
if (!print_stats && !is_last_report && !progress_avio)
return;
if (!is_last_report) {
if (last_time == -1) {
last_time = cur_time;
return;
}
if ((cur_time - last_time) < 500000)
return;
last_time = cur_time;
}
t = (cur_time-timer_start) / 1000000.0;
oc = output_files->ctx;
total_size = avio_size(oc->pb);
if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
total_size = avio_tell(oc->pb);
buf = '\0';
vid = 0;
av_bprint_init(&buf_script, 0, 1);
for (i = 0; i < nb_output_streams; i++) {
float q = -1;
ost = output_streams;
enc = ost->enc_ctx;
if (!ost->stream_copy)
q = ost->quality / (float) FF_QP2LAMBDA;
if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
ost->file_index, ost->index, q);
}
if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
float fps;
frame_number = ost->frame_number;
fps = t > 1 ? frame_number / t : 0;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
frame_number, fps < 9.95, fps, q);
av_bprintf(&buf_script, "frame=%d\n", frame_number);
av_bprintf(&buf_script, "fps=%.1f\n", fps);
av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
ost->file_index, ost->index, q);
if (is_last_report)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
if (qp_hist) {
int j;
int qp = lrintf(q);
if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
qp_histogram++;
for (j = 0; j < 32; j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", av_log2(qp_histogram + 1));
}
if ((enc->flags & AV_CODEC_FLAG_PSNR) && (ost->pict_type != AV_PICTURE_TYPE_NONE || is_last_report)) {
int j;
double error, error_sum = 0;
double scale, scale_sum = 0;
double p;
char type = { 'Y','U','V' };
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
for (j = 0; j < 3; j++) {
if (is_last_report) {
error = enc->error;
scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
} else {
error = ost->error;
scale = enc->width * enc->height * 255.0 * 255.0;
}
if (j)
scale /= 4;
error_sum += error;
scale_sum += scale;
p = psnr(error / scale);
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type, p);
av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
ost->file_index, ost->index, type | 32, p);
}
p = psnr(error_sum / scale_sum);
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
ost->file_index, ost->index, p);
}
vid = 1;
}
/* compute min output value */
if (av_stream_get_end_pts(ost->st) != AV_NOPTS_VALUE)
pts = FFMAX(pts, av_rescale_q(av_stream_get_end_pts(ost->st),
ost->st->time_base, AV_TIME_BASE_Q));
if (is_last_report)
nb_frames_drop += ost->last_dropped;
}
secs = FFABS(pts) / AV_TIME_BASE;
us = FFABS(pts) % AV_TIME_BASE;
mins = secs / 60;
secs %= 60;
hours = mins / 60;
mins %= 60;
bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
speed = t != 0.0 ? (double)pts / AV_TIME_BASE / t : -1;
if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"size=N/A time=");
else snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"size=%8.0fkB time=", total_size / 1024.0);
if (pts < 0)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "-");
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"%02d:%02d:%02d.%02d ", hours, mins, secs,
(100 * us) / AV_TIME_BASE);
if (bitrate < 0) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=N/A");
av_bprintf(&buf_script, "bitrate=N/A\n");
}else{
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=%6.1fkbits/s", bitrate);
av_bprintf(&buf_script, "bitrate=%6.1fkbits/s\n", bitrate);
}
if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
else av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
hours, mins, secs, us);
if (nb_frames_dup || nb_frames_drop)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
nb_frames_dup, nb_frames_drop);
av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
if (speed < 0) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf)," speed=N/A");
av_bprintf(&buf_script, "speed=N/A\n");
} else {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf)," speed=%4.3gx", speed);
av_bprintf(&buf_script, "speed=%4.3gx\n", speed);
}
if (print_stats || is_last_report) {
const char end = is_last_report ? '\n' : '\r';
if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
fprintf(stderr, "%s %c", buf, end);
} else
av_log(NULL, AV_LOG_INFO, "%s %c", buf, end);
fflush(stderr);
}
if (progress_avio) {
av_bprintf(&buf_script, "progress=%s\n",
is_last_report ? "end" : "continue");
avio_write(progress_avio, buf_script.str,
FFMIN(buf_script.len, buf_script.size - 1));
avio_flush(progress_avio);
av_bprint_finalize(&buf_script, NULL);
if (is_last_report) {
if ((ret = avio_closep(&progress_avio)) < 0)
av_log(NULL, AV_LOG_ERROR,
"Error closing progress log, loss of information possible: %s\n", av_err2str(ret));
}
}
if (is_last_report)
print_final_stats(total_size);
}
日志打印信息：
frame=4100498 fps= 25 q=18.0 size=89792657kB time=45:33:42.97 bitrate=4484.6kbits/s speed= 1x
frame=4100514 fps= 25 q=15.0 size=89792872kB time=45:33:43.70 bitrate=4484.6kbits/s speed= 1x
frame=4100518 fps= 25 q=20.0 size=89793197kB time=45:33:44.08 bitrate=4484.6kbits/s speed= 1x
frame=4100540 fps= 25 q=15.0 size=89793459kB time=45:33:44.66 bitrate=4484.6kbits/s speed= 1x
frame=4100545 fps= 25 q=14.0 size=89793549kB time=45:33:45.21 bitrate=4484.6kbits/s speed= 1x
frame=4100565 fps= 25 q=16.0 size=89794069kB time=45:33:45.72 bitrate=4484.6kbits/s speed= 1x
frame=4100574 fps= 25 q=15.0 size=89794185kB time=45:33:46.24 bitrate=4484.6kbits/s speed= 1x
frame=4100588 fps= 25 q=18.0 size=89794625kB time=45:33:46.58 bitrate=4484.6kbits/s speed= 1x
frame=4100604 fps= 25 q=15.0 size=89794841kB time=45:33:47.26 bitrate=4484.6kbits/s speed= 1x
frame=4100610 fps= 25 q=21.0 size=89795189kB time=45:33:47.66 bitrate=4484.6kbits/s speed= 1x
frame=4100630 fps= 25 q=15.0 size=89795426kB time=45:33:48.30 bitrate=4484.6kbits/s speed= 1x
frame=4100635 fps= 25 q=15.0 size=89795519kB time=45:33:48.82 bitrate=4484.6kbits/s speed= 1x
DTS 10284683486 < 10391368972 out of order
exponent 25 is out-of-range
error decoding the audio block
frame sync error
Error while decoding stream #0:1: Invalid data found when processing input
frame=4100653 fps= 25 q=16.0 size=89796010kB time=45:33:49.26 bitrate=4484.6kbits/s speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:49.82 bitrate=4484.6kbits/s dup=0 drop=9 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:50.27 bitrate=4484.6kbits/s dup=0 drop=23 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:50.78 bitrate=4484.6kbits/s dup=0 drop=35 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:51.29 bitrate=4484.6kbits/s dup=0 drop=47 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:51.76 bitrate=4484.6kbits/s dup=0 drop=60 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:52.27 bitrate=4484.5kbits/s dup=0 drop=72 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:52.85 bitrate=4484.5kbits/s dup=0 drop=84 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:53.36 bitrate=4484.5kbits/s dup=0 drop=99 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:53.81 bitrate=4484.5kbits/s dup=0 drop=112 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:54.32 bitrate=4484.5kbits/s dup=0 drop=125 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:54.83 bitrate=4484.5kbits/s dup=0 drop=136 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:55.32 bitrate=4484.5kbits/s dup=0 drop=149 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:55.86 bitrate=4484.4kbits/s dup=0 drop=160 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:56.43 bitrate=4484.4kbits/s dup=0 drop=174 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:56.92 bitrate=4484.4kbits/s dup=0 drop=189 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:57.46 bitrate=4484.4kbits/s dup=0 drop=201 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:57.97 bitrate=4484.4kbits/s dup=0 drop=213 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796047kB time=45:33:58.46 bitrate=4484.4kbits/s dup=0 drop=225 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796056kB time=45:33:58.97 bitrate=4484.4kbits/s dup=0 drop=239 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796065kB time=45:33:59.48 bitrate=4484.3kbits/s dup=0 drop=249 speed= 1x
frame=4100656 fps= 25 q=16.0 size=89796074kB time=45:34:00.02 bitrate=4484.3kbits/s dup=0 drop=264 speed= 1x
print_report仅仅是输出信息而已，其实主要还是在里面处理的时候dup或者drop了，看你的log，中途解码出错了，而且也报了 DTS 10284683486 < 10391368972 out of order
好的谢谢大师兄
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