Viewing on VLC works great. Audio/Video perfectly in sync. Viewing in Quicktime
(Version 10.4 MacOS sierra, Quicktime 7) the video get's out of sync after 3/4
minutes. Scrubbing in the timeline will fix the problem, then after 3/4 minutes
I see the synchronization problem again.
Using current FFmpeg version to transcode into H.264 and AAC TS chunks.
ffmpeg -i "udp://224.5.2.5:10001?overrun_nonfatal=1&fifo_size=50000000" -map
0:3 -map 0:4 -s 1280x720 -acodec aac -b:a 192k -ac 2 -ar 48000 -vcodec libx264
-preset:v medium -r 50 -g 100 -vb 3200000 -y -fflags +genpts -f segment
-segment_time 60 -segment_atclocktime 1 -strftime 1
"/videofiles/TV_HD_%Y-%m-%d_%H-%M-%S.ts
Everything works fine... chunks are created. No errors in output. Audio/video
TS pieces in sync.
#### Details of a chunk file:
ffprobe /videofiles/TV_HD_2017-03-13_14-25-00.ts
ffprobe version 3.2.4-tessus Copyright (c) 2007-2017 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus
--enable-avisynth --enable-fontconfig --enable-gpl --enable-libass
--enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopus --enable-libschroedinger --enable-libsnappy --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack
--enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit
--disable-indev=x11grab_xcb
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Input #0, mpegts, from
'/Users/Andreas/Desktop/TEST/ARD_HD_2017-03-13_14-25-00.ts':
Duration: 00:01:00.04, start: 115.402667, bitrate: 3720 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B),
yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100
tbc
Stream #0:1[0x101](deu): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz,
stereo, fltp, 204 kb/s
#### Merging together:
ffmpeg -f concat -safe 0 -i files.txt -y -metadata creation_time=now -c:v copy
-c:a copy -fflags +genpts -movflags faststart -use_editlist 0 -f mp4
tvexport.mp4
#### and output:
ffmpeg version 3.2.4-tessus Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus
--enable-avisynth --enable-fontconfig --enable-gpl --enable-libass
--enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopus --enable-libschroedinger --enable-libsnappy --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack
--enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit
--disable-indev=x11grab_xcb
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Input #0, concat, from 'files.txt':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B),
yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100
tbc
Stream #0:1(deu): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz,
stereo, fltp, 169 kb/s
Output #0, mp4, to 'work_tmp0.mp4':
Metadata:
creation_time : now
encoder : Lavf57.56.101
Stream #0:0: Video: h264 (High) ([33][0][0][0] / 0x0021),
yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 50 fps, 50 tbr, 90k
tbn, 90k tbc
Stream #0:1(deu): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz,
stereo, 169 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x7fff37800600] Starting second pass: moving the moov atom to the
beginning of the filex
frame=24000 fps=9825 q=-1.0 Lsize= 199633kB time=00:08:00.20
bitrate=3405.6kbits/s speed= 197x
video:187817kB audio:11755kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.030912%
What could be the problem?
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