INTRODUCTION:
-------------
I'm regularly recording movies on french channels, via a functionality of my
NAS.
The resulting files are ***.ts** (I suppose the program behind is ffmpeg or
vlc, but can't be sure).
Those records contain multi-lang and subtitles, and any of my players (tv,
chromecast, vlc android or win) can see all the channels with the correct names
(like french subtitles, french or VO sound tracks etc..).
Then I'm using ffpmeg to cut the advertising, by extracting the desired parts,
and merging them via a concat command.
Here are the commands I'm using:
Extract:
ffmpeg.exe -loglevel info -i $SOURCE -ss $TIME_START -t $TIME_DURATION -c
copy -map 0 -ignore_unknown -y $CHUNK_DESTINATION
Concat files:
ffmpeg.exe -loglevel info -f concat -safe 0 -i $FFMPEG_LIST_FILE -c copy
-map 0 -c:v libx264 -c:a aac -ignore_unknown -y $DESTINATION
Up to now, I've been using the static build **ffmpeg-3.0.1-win64-static** for
windows, and everything worked like a charm.
PROBLEM:
--------
Recently, mainly for saving space on my NAS, I decided to switch the video
codec to **libx265**. So I had to update the ffmpeg build to the last version
available: **ffmpeg-4.1.3-win64-static**.
Then my concat command changes to:
ffmpeg.exe -loglevel info -f concat -safe 0 -i $FFMPEG_LIST_FILE -c copy
-map 0 -c:v libx265 -c:a aac -ignore_unknown -y $DESTINATION
My problem is that as soon as I use the newer versions of ffmpeg (above 4.*, I
tried several intermediate), the conversion process change the name of the
channels (sound and subtitles), and most of my players (Smart TV, chromecast)
doesn't see the subtitles anymore.
It happens independently of the video codec. I tried **libx264** and
**libx265**, and also different container: I tried with **mkv**, **mp4** and
**ts**).
I tried with the explicit "subtitle copy" option of ffmpeg, to be sure it's not
trying to convert/re-encode, but without any effect.
I also tried to first cut/concat the movie with the old
**ffmpeg-3.0.1-win64-static** with libx264, and then convert to h265 with the
new version **ffmpeg-4.1.3-win64-static** and the command:
ffmpeg.exe -loglevel info -i "The Revenant (2015).ts" -c copy -map 0 -c:v
libx265 -c:a aac -ignore_unknown -y "The Revenant (2015) h265.ts"
Here are the ffprobe infos for each version, and they are pretty similar..:
The Revenant (2015).ts (ffmpeg-3.0.1-win64-static / h264):
----------------------------------------------------------
ffprobe version 4.1.3 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 8.3.1 (GCC) 20190414
configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr
--enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
--enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab
--enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex
--enable-libxvid --enable-libaom --enable-libmfx --enable-amf
--enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc
--enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
[mpegts @ 000002b515a5c700] start time for stream 5 is not set in
estimate_timings_from_pts
Input #0, mpegts, from 'C:/zzzz_films_converted/Copi├®/The Revenant
(2015).ts':
Duration: 02:21:59.18, start: 1.400000, bitrate: 3830 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), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50
tbc
Stream #0:1[0x101](fre): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 134 kb/s
Stream #0:2[0x102](qad): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 149 kb/s
Stream #0:3[0x103](qaa): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 132 kb/s
Stream #0:4[0x104](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
(hearing impaired)
Stream #0:5[0x105](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
The Revenant (2015) h265.ts (ffmpeg-4.1.3-win64-static / h264):
---------------------------------------------------------------
ffprobe version 4.1.3 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 8.3.1 (GCC) 20190414
configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr
--enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
--enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab
--enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex
--enable-libxvid --enable-libaom --enable-libmfx --enable-amf
--enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc
--enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
[mpegts @ 0000027d31b3c700] start time for stream 5 is not set in
estimate_timings_from_pts
Input #0, mpegts, from 'C:/zzzz_films_converted/Copi├®/The Revenant (2015)
h265.ts':
Duration: 02:21:59.22, start: 1.400000, bitrate: 1719 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: hevc (Main) ([36][0][0][0] / 0x0024),
yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 25 tbc
Stream #0:1[0x101](fre): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 136 kb/s
Stream #0:2[0x102](qad): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 137 kb/s
Stream #0:3[0x103](qaa): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 125 kb/s
Stream #0:4[0x104](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
(hearing impaired)
Stream #0:5[0x105](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
I've googled a lot, but cannot find any similar problem.
I can provide the video files presented here for **testing purpose only**...
Thanks for having read this endless post :)
PS: I've posted this question as well on Super User:
https://superuser.com/questions/1433894/ffmpeg-encoding-video-changes-sounds-and-subtitles-tracks-names-and-make-them
Kind regards,
Quentin MORRIER
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