transport-stream

问题 I would like to capture video, compress it and mux it as an mpeg2 ts. All of this is quite simple with the ffmpeg libraries, but what I would like to do, instead of writing it to a file, is capture the ts packets in a buffer and using this stream in other ways. Is there a simple way to do this? To write the encoded frames to file right now, I use av_interleaved_write_frame(oc, &pkt). OC is an output context with a filename and format defined. pkt is an AVPacket containing the compressed frame

问题 I am using m3u8 video format for streaming the video and now I need to display subtitles for the same. I searched in Apple Documentation and found that I can achieve this by using the closedCaptionDisplayEnabled property of AVPlayer . I am interested to know what should be the format of subtitles? Will the .srt format do? Also can I achieve the same using MPMoviePlayerController ? Any help is appreciated. 回答1: Update 10/30/2018: It's worth checking this answer by an Apple engineer (Thanks to

问题 I have captured video frame from multi media device. Captured stream has two slice packets. For testing a use case I need to convert it to transport stream with one slice packet. Any suggestions/pointers? 回答1: One slice is default on all h264 encoders I know of. Use ‘ffmpeg -i file.ts our -codec libx264 outfile.ts’ 来源： https://stackoverflow.com/questions/58106400/how-to-convert-captured-video-stream-with-two-slice-packet-to-transport-stream-w

问题 When inspecting a transport stream using tsduck, I can see that some packets contains a PCR value in Hex. I am not sure how to convert these into timestamps. For example, in the packet below the PCR value is 0x000002014CE * Packet 179 ---- TS Header ---- PID: 481 (0x01E1), header size: 25, sync: 0x47 Error: 0, unit start: 1, priority: 0 Scrambling: 0, continuity counter: 4 Adaptation field: yes (21 bytes), payload: yes (163 bytes) Discontinuity: 0, random access: 0, ES priority: 0 PCR:

问题 I would like to multiplex a HEVC coded video into a MPEG-Transportstream. I have a Video coded with the x265 Encoder. x265 raw.y4m --output coded.hevc I want to multiplex this Video into an MPEG Transportstream. I tried it among other things this way: ffmpeg -fflags +genpts -i coded.hevc -c:v copy -f mpegts transportstream.ts Unfortunately this error message shows up and the transportstream.ts is empty. [mpegts @ 0x1fa76a0] Timestamps are unset in a packet for stream 0. This is deprecated and

问题 I'm using FFMPEG and a free segmenter (Carson Mcdonald's) to produce my ts segments which i later save to a web server and play with Quicktime by playing the .m3u8 If I have segments 1,2,3,4 and another stream with segments 1,2,3,4 and would like to interleave them what should I do. If i do as follows: 1,2, other stream's 3, 4 It works fine. However, If i want to do as follows: 1,2, other stream's 4, 4 it doesn't work. In other words the segment to be added must have the same number as the

问题 Everything is in the same directory. M3u8 File : #EXTM3U #EXT-X-ALLOW-CACHE:NO #EXT-X-TARGETDURATION:10 #EXT-X-MEDIA-SEQUENCE:0 #EXT-X-KEY:METHOD=AES-128,URI=MyKeyFile.key #EXTINF:10, aes_ts_files/filesequence0000000.ts #EXTINF:10, aes_ts_files/filesequence0000001.ts #EXTINF:10, aes_ts_files/filesequence0000002.ts #EXTINF:10, aes_ts_files/filesequence0000003.ts #EXTINF:10, aes_ts_files/filesequence0000004.ts #EXTINF:10, aes_ts_files/filesequence0000005.ts #EXTINF:10, aes_ts_files

问题 I have entire mux with four channels dumped in a single *.ts file. I'm demultiplexing that and I can't find any info on how to extract the resolution, framerate, codec, language, channels, etc... Should I read macroblocks, or do something else? Thnx. 回答1: Here is the listing of where to look for the information: Number of programs, their description etc. : PAT and PMT. The number of Audio and languages and additional information : SDT, BAT etc. Codec - refer to PES header - stream_id and look

问题 im working in a file broadcasting method using mpeg2-ts and ISDB-T ( Integrated Services Digital Broadcasting - Terrestial), My problem is that im not being able to to put a file into the data stream, or as rawvideo, or anithing inside the mpeg-ts.... im using ffmpeg and avconv. Here is an example of a test: ffmpeg -f mpegts -i Myfile.tgz -probesize FILESIZE -mpegts_original_network_id 0x1 -mpegts_transport_stream_id 0x1 -mpegts_service_id 0x25 -mpegts_pmt_start_pid 0xbb9 -mpegts_start_pid

问题 I wish to extract the audio and video of a certain program in a transport stream file (.ts) by specifying its PID without losing quality and using the same codec in the resulting file (the output file is a MPEG). Is that even possible with FFmpeg? If so, how can I do it? So far, I've come to this command: ffmpeg -i tsfile.ts -vcodec copy -acodec copy -q:v 1 output.mpg Edit : Note that the file output.mpg is created. The file contains the video but the audio isn't attached (no sound). Also, I