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玉山
花旗
永豐
2017年10月16日
不管怎樣/ 儘管如此/ 然而
- however 不管怎樣
If Jane likes something she'll buy it however much it costs. - nevertheless 儘管如此
She was very tired, nevertheless she went to gym. - nonetheless 然而,仍然
You may not believe it, but it is nonetheless true - whereas 儘管
He must be about 40, whereas his wife looks about 20. - while 在....的時候
I read the book while you were drying your hair. - although 雖然,儘管
Kelly walked home by herself, although she knew that it was dangerous. - despite / in sprite of 不管
I still enjoyed the week despite the weather. - yet 還沒
He hasn't finished yet. - but 但是
I didn't go, but he did.
相同/相似/好像
- same as 和...相同
Michelle's the same age as me. - similar to 和...相似
Lemons are similar to limes. - similarly 同樣地,相似地
The children were similarly dressed. - equally 平等的,相同的
She looked equally nice in both dresses. - likewise 同樣,一樣
Go and do likewise. - like 好像
It looks like rain. - also 而且
I'm cold, and I'm also tired and hungry. - just as 正好
He left at three, which was just as well. - just like 就像是
She's so kindly, just like an angel.
2015年10月30日
[iOS]3D touch
參考了蘋果官方文件，和一些網路資訊，整理了3D touch的用法
3D touch整理
使用範例
實作的時候，發現preview action sheet的實作要在preview view controller的那個class才能work
3D touch整理
使用範例
實作的時候，發現preview action sheet的實作要在preview view controller的那個class才能work
2015年10月26日
[FFMPEG]把ts串接成mp4
參考了 http://albert-oma.blogspot.tw/2013/06/ffmpeg-h264-mp4.html 這篇文章
-(void)transferToMP4
{
NSDate *startTime = [NSDate date];
NSDate *endTime;
NSTimeInterval interval;
NSLog(@"-------------------------------------");
NSLog(@"start : %@",[NSDate date]);
NSLog(@"-------------------------------------");
AVBitStreamFilterContext *vbsf = NULL;
AVBitStreamFilterContext *absf = NULL;
AVPacket pkt;
av_register_all();
avcodec_register_all();
NSString *fileName = @"export.mp4";
BOOL isFirstFile = YES;
NSString *exportPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:fileName];
if (avformat_alloc_output_context2(&outputCtx,
NULL,
"mp4",
[exportPath UTF8String]) < 0)
{
NSLog(@"avformat_alloc_output_context2 : open file
error!!!");
return;
}
NSArray *fileList = [NSArray arrayWithObjects:@"http://shell.site/0006.ts",
@"http://shell.site/0012.ts",
@"http://shell.site/0018.ts", nil];
int
lastVideoPTS = 0,lastAudioPTS = 0, lastAudioDTS = 0;
int
currentLastVideoPTS = 0,currentLastAudioPTS = 0,currentLastAudioDTS = 0;
for (NSString *fileName in fileList)
{
NSString *tsFile = fileName;
// NSString *tsFile = [[NSBundle
mainBundle] pathForResource:fileName ofType:@"ts"];
//open
input file
AVFormatContext *inputCtx = NULL;
avformat_open_input(&inputCtx,
[tsFile UTF8String],
NULL,
NULL);
avformat_find_stream_info(inputCtx, NULL);
av_dump_format(inputCtx, NULL, [tsFile UTF8String], 0);
if (isFirstFile)
{
for (int streamIndex = 0; streamIndex < inputCtx->nb_streams; streamIndex++ )
{
NSLog(@"Channel %d of %d",streamIndex,inputCtx->nb_streams);
AVStream *out_stream = NULL;
AVStream *in_stream = NULL;
in_stream = inputCtx->streams[streamIndex];
out_stream = avformat_new_stream(outputCtx, in_stream->codec->codec);
avcodec_copy_context(outputCtx->streams[streamIndex]->codec,
inputCtx->streams[streamIndex]->codec);
out_stream->codec->codec_tag = 0;
if (outputCtx ->oformat->flags & AVFMT_GLOBALHEADER)
{
out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
out_stream->time_base = in_stream->time_base;
}
}
absf = av_bitstream_filter_init("aac_adtstoasc");
av_dump_format(outputCtx, NULL, [exportPath UTF8String], 1);
if (isFirstFile)
{
if (avio_open2(&outputCtx->pb,
[exportPath UTF8String],
AVIO_FLAG_WRITE,
&outputCtx->interrupt_callback,
NULL) < 0)
{
NSLog(@"can not open output file!!");
return;
}
if (avformat_write_header(outputCtx, NULL) < 0)
{
NSLog(@"Can not write the header");
}
}
BOOL isFirstVideoPkt = YES;
int firstPktPTS = 0 ;
while (1)
{
AVStream *in_stream = NULL;
AVStream *out_stream = NULL;
int ret = av_read_frame(inputCtx,
&pkt);
if (ret < 0 )
{
NSLog(@"read frame : %d",ret);
break;
}
in_stream = inputCtx->streams[pkt.stream_index];
out_stream = outputCtx->streams[pkt.stream_index];
if
(in_stream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
{
AVPacket fpkt = pkt;
pkt.data = fpkt.data;
pkt.size = fpkt.size;
if (isFirstVideoPkt)
{
firstPktPTS = pkt.pts;
isFirstVideoPkt = NO;
}
pkt.pts = pkt.pts -
firstPktPTS + lastVideoPTS;
pkt.dts = pkt.pts;
currentLastVideoPTS = pkt.pts;
pkt.pos = pkt.pts;
}
else if (in_stream->codec->codec_type == AVMEDIA_TYPE_AUDIO)
{
AVPacket fpkt = pkt;
av_bitstream_filter_filter(absf,
out_stream->codec,
NULL,
&fpkt.data,
&fpkt.size,
pkt.data,
pkt.size,
pkt.flags & AV_PKT_FLAG_KEY);
pkt.data = fpkt.data;
pkt.size = fpkt.size;
pkt.pts = av_rescale_q_rnd(pkt.pts + lastAudioPTS, in_stream->codec->time_base,
in_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
pkt.dts = av_rescale_q_rnd(pkt.dts + lastAudioDTS, in_stream->codec->time_base,
in_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
pkt.duration = av_rescale_q(pkt.duration, in_stream->codec->time_base, in_stream->time_base);
currentLastAudioPTS = pkt.pts;
currentLastAudioDTS = pkt.dts;
}
pkt.pos = pkt.pts;
ret = av_write_frame(outputCtx, &pkt);
if (ret < 0)
{
NSLog(@"write frame error!!!");
break;
}
av_free_packet(&pkt);
}//end
while
lastVideoPTS = currentLastVideoPTS + 1 ;
lastAudioPTS = currentLastAudioPTS + 1;
lastAudioDTS = currentLastAudioDTS + 1;
avformat_close_input(&inputCtx);
av_bitstream_filter_close(vbsf);
av_bitstream_filter_close(absf);
isFirstFile = NO;
}
av_write_trailer(outputCtx);
avio_close(outputCtx->pb);
avformat_free_context(outputCtx);
NSLog(@"-------------------------------------");
endTime = [NSDate date];
NSLog(@"end : %@",endTime);
interval = [endTime timeIntervalSinceDate:startTime];
NSLog(@"file number:%d ,interval : %f",fileList.count,interval);
NSLog(@"-------------------------------------");
return;
}
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