MKV Embedded Subtitles
Posted: Sat Mar 08, 2014 11:54 pm
Hi.
My problem is that I cannot play MKV files with embedded subtitles on my Samsung TV (model D). It seems to be confirmed that Samsung cannot render natively embedded subtitles so transcoding is needed. Chosing the #TRANSCODE folder results in a two phase ffmpeg command suite for first extracting to .ass with an error and empty file as result and then transcoding with "-vf ass" as filter option where ffmpeg exits with "error opening filter". It turns out that my ffmpeg was compiled without --enable-libass which seems to be the missing part according to sources on the web.
If I instead use the ffmpeg boundled with UMS, the MKV subtitles transcoding works as it should. So obviously the problem is within my ffmpeg. The reason that I cannot use the ffmpeg boundled with UMS is that it is not compatible with HLS/HTTPS web-streaming which I need for some web-content (SVTPlay) to work. And as of my understanding, no one is prepared to maintain the boundled version so that's why I'm not requesting the feature to be added.
Now before I start the huge work to get a working ffmpeg, I'd like to get some confirmation that my conclusion is correct. Or else if someone could point out the correct building options.
If I get a confirmation that I am on the right track, then I will first try to get the missing lib into Jon Severinssons ffmpeg build for Ubuntu (which works like a charm apart from MKV embedded subtitles).
The complete list of libs (build options) in the boundled ffmpeg that are not in my ffmpeg is:
lxml2, lexpt, libmp3lame, gray (?), libass, libvo-cenc, libvo-amrwbenc, version3 (?).
The list comparing in the other direction is even longer.
Pen
PS: I also see that the target .ass file and the source .ass file path are not the same (the target ending up in /tmp and the source fetched from /var). So this might be a further problem which looks like a bug or setting issue in UMS or it might just be that UMS tries the paths in order. Any help with this is also appreciated. At worse I can make a symbolic link as a workaround.
Debug log
Comparision of of ffmpeg
My problem is that I cannot play MKV files with embedded subtitles on my Samsung TV (model D). It seems to be confirmed that Samsung cannot render natively embedded subtitles so transcoding is needed. Chosing the #TRANSCODE folder results in a two phase ffmpeg command suite for first extracting to .ass with an error and empty file as result and then transcoding with "-vf ass" as filter option where ffmpeg exits with "error opening filter". It turns out that my ffmpeg was compiled without --enable-libass which seems to be the missing part according to sources on the web.
If I instead use the ffmpeg boundled with UMS, the MKV subtitles transcoding works as it should. So obviously the problem is within my ffmpeg. The reason that I cannot use the ffmpeg boundled with UMS is that it is not compatible with HLS/HTTPS web-streaming which I need for some web-content (SVTPlay) to work. And as of my understanding, no one is prepared to maintain the boundled version so that's why I'm not requesting the feature to be added.
Now before I start the huge work to get a working ffmpeg, I'd like to get some confirmation that my conclusion is correct. Or else if someone could point out the correct building options.
If I get a confirmation that I am on the right track, then I will first try to get the missing lib into Jon Severinssons ffmpeg build for Ubuntu (which works like a charm apart from MKV embedded subtitles).
The complete list of libs (build options) in the boundled ffmpeg that are not in my ffmpeg is:
lxml2, lexpt, libmp3lame, gray (?), libass, libvo-cenc, libvo-amrwbenc, version3 (?).
The list comparing in the other direction is even longer.
Pen
PS: I also see that the target .ass file and the source .ass file path are not the same (the target ending up in /tmp and the source fetched from /var). So this might be a further problem which looks like a bug or setting issue in UMS or it might just be that UMS tries the paths in order. Any help with this is also appreciated. At worse I can make a symbolic link as a workaround.
Debug log
Code: Select all
DEBUG 2014-03-08 17:07:00.605 [New I/O worker #3] Starting transcode/remux of 12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ.mkv with media info: container: matroska, bitrate: 1994752, size: 1960063671, video codec: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), duration: 02:14:05.87, width: 720, height: 304, frame rate: 23.98, thumb size : 9579, muxing mode: null, mime type: video/x-matroska
Audio track id: 0, lang: und, flavor: null, audio codec: AC3, sample frequency:48000, number of channels: 2, bits per sample: 16
Subtitle track id: 0, type: ASS, flavor: null, lang: swe, externalFileCharacterSet: null
DEBUG 2014-03-08 17:07:00.609 [ffmpeg-191] Starting /usr/bin/ffmpeg -y -loglevel fatal -i /mnt/Paros/Filmer/1/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID-WhiteFlameZ/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ.mkv -map 0:s:0 /tmp/universalmediaserver/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ.ass
DEBUG 2014-03-08 17:07:00.638 [ffmpeg-191] Attaching thread: ffmpeg-191
DEBUG 2014-03-08 17:07:00.639 [ffmpeg-191] Unix process ID (/usr/bin/ffmpeg): 11417
INFO 2014-03-08 17:07:00.641 [ffmpeg-191] Process /usr/bin/ffmpeg has a return code of 1! Maybe an error occurred... check the log file
DEBUG 2014-03-08 17:07:00.642 [New I/O worker #3] No encoding detected for /tmp/universalmediaserver/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ.ass.
DEBUG 2014-03-08 17:07:00.644 [New I/O worker #3] No encoding detected for /tmp/universalmediaserver/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ.ass.
DEBUG 2014-03-08 17:07:00.644 [New I/O worker #3] No encoding detected for /var/local/UMS/data/subs/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ_ID0_1391968285000.ass.
DEBUG 2014-03-08 17:07:00.645 [ffmpeg-192] Starting /usr/bin/ffmpeg -y -loglevel fatal -i /mnt/Paros/Filmer/1/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID-WhiteFlameZ/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ.mkv -vf ass=/var/local/UMS/data/subs/12.Years.a.Slave.2013.SWESUB.DVDScr.XVID.WhiteFlameZ_ID0_1391968285000.ass -bufsize 12500000 -maxrate 11000000 -crf 16 -c:a copy -c:v libx264 -preset superfast -level 31 -pix_fmt yuv420p -f mpegts pipe:
DEBUG 2014-03-08 17:07:00.676 [Thread-782] Error opening filters!
DEBUG 2014-03-08 17:07:00.689 [ffmpeg-192] Attaching thread: ffmpeg-192
DEBUG 2014-03-08 17:07:00.690 [ffmpeg-192] Unix process ID (/usr/bin/ffmpeg): 11423
INFO 2014-03-08 17:07:00.690 [ffmpeg-192] Process /usr/bin/ffmpeg has a return code of 1! Maybe an error occurred... check the log fileCode: Select all
UMS boundled ffmpeg (can transcode mkv embedded subtitles)
admin@Athena:~$ /usr/local/bin/UMS/linux/ffmpeg
ffmpeg version N-58485-ga12b4bd Copyright (c) 2000-2013 the FFmpeg developers
built on Nov 27 2013 05:14:45 with gcc 4.6 (Debian 4.6.3-1)
configuration: --prefix=/root/ffmpeg-static/32bit --arch=x86_32 --extra-cflags='-m32 -I/root/ffmpeg-static/32bit/include -static' --extra-ldflags='-m32 -L/root/ffmpeg-static/32bit/lib -static' --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared --disable-ffserver --disable-doc --enable-bzlib --enable-zlib --enable-postproc --enable-runtime-cpudetect --enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype --enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-version3 --enable-libvpx
libavutil 52. 55.100 / 52. 55.100
libavcodec 55. 44.100 / 55. 44.100
libavformat 55. 21.102 / 55. 21.102
libavdevice 55. 5.101 / 55. 5.101
libavfilter 3. 91.100 / 3. 91.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Jon Severinssons ffmpeg (can not transcode mkv embedded subtitles)
admin@Athena:~$ ffmpeg
ffmpeg version 0.10.11-7:0.10.11-1~precise1 Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 6 2014 16:53:05 with gcc 4.6.3
configuration: --arch=amd64 --disable-stripping --enable-pthreads --enable-runtime-cpudetect --extra-version='7:0.10.11-1~precise1' --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-libcdio --enable-x11grab --enable-libx264 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
libavutil 51. 35.100 / 51. 35.100
libavcodec 53. 61.100 / 53. 61.100
libavformat 53. 32.100 / 53. 32.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 61.100 / 2. 61.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 6.100 / 0. 6.100
libpostproc 52. 0.100 / 52. 0.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...