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 am unable to specify the program PID to extract.
Edit 2: Here's the output of ffmpeg -i tsfile.ts
ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
built on Nov 25 2012 12:21:26 with gcc 4.7.2 (GCC)
libavutil 52. 9.100 / 52. 9.100
libavcodec 54. 77.100 / 54. 77.100
libavformat 54. 37.100 / 54. 37.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 23.102 / 3. 23.102
libswscale 2. 1.102 / 2. 1.102
libswresample 0. 17.101 / 0. 17.101
libpostproc 52. 2.100 / 52. 2.100
[mpeg2video @ 0201c7a0] mpeg_decode_postinit() failure
Last message repeated 10 times
[mpegts @ 0037b800] PES packet size mismatch
Input #0, mpegts, from 'tsfile.ts':
Duration: 00:01:30.58, start: 56297.848344, bitrate: 18045 kb/s
Program 1
Stream #0:0[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x34]: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), s16, 384 kb/s
Here's a tsinfo.exe on the .ts file:
Reading from C:\tsfile.ts
Scanning 10000 TS packets
Packet 1 is PAT
Program list:
Program 1 -> PID 0020 (32)
Packet 2 is PMT with PID 0020 (32)
Program 1, version 1, PCR PID 0031 (49)
Program info (38 bytes): 0e 03 c0 b9 16 10 06 c0 02 71 c0 04 00 0b 02 42 3f 05 04
47 41 39 34 86 0d e2 65 6e 67 7e 3f ff 65 6e 67 c1 3f ff
maximum bitrate (3 bytes): c0 b9 16
smoothing buffer (6 bytes): c0 02 71 c0 04 00
system clock (2 bytes): 42 3f
Registration GA94
Descriptor tag 86 (134) (13 bytes): e2 65 6e 67 7e 3f ff 65 6e 67 c1 3f ff
Program streams:
PID 0031 ( 49) -> Stream type 02 ( 2) H.262/13818-2 video (MPEG-2) or 11172-2 constrained video
PID 0034 ( 52) -> Stream type 81 (129) User private
ES info (6 bytes): 6a 04 41 43 2d 33
DVB AC-3 (4 bytes): 41 43 2d 33
Found 14 PAT packets and 7 PMT packets in 10000 TS packets
回答1:
ffmpeg can select program stream as well as elementary stream within program. using map option and stream specifier. look at - https://superuser.com/questions/343716/ffmpeg-how-to-demux-live-multi-program-transport-stream
回答2:
I could get SPTS from MPTS in ffmpeg by extracting required streams and remuxing it. My mpts has 6 streams for three programs (one audio, one video):
ffmpeg -i mpt.ts -map 0:0 -map 0:1 -acodec copy -vcodec copy -f mpts program1.ts
来源:https://stackoverflow.com/questions/13942424/ffmpeg-extracting-video-and-audio-from-transport-stream-file-ts