MKV split with mkvmerge won't transcode
Posted: Sun Nov 11, 2012 1:39 pmI have a playable MKV that I created with mkvmerge 5.7.0. If I then use mkvmerge on this file to split it into pieces, the resulting files won't play; my Samsung BD player (C series) says "Not supported file format" right away, and serviio.log says "FFmpeg execution failed at org.serviio.delivery.resource.transcode.FileBasedTranscodingDeliveryStrategy.createInputStream(FileBasedTranscodingDeliveryStrategy.java:47)"
MediaInfo tells me the only notable difference is that the original, playable MKV contains this info, which is not in the new, unplayable file:
Format settings, GOP : M=8, N=24
Here's an example of how I did the split (extracting a 7-minute segment to a separate file):
mkvmerge --split parts:30:17.08-37:58.2 -o "output.mkv" "input.mkv"
Like I said, input.mkv plays fine. output.mkv does not.
I used mkvmerge because ffmpeg has trouble demuxing MKVs. For example, if I try to do the split with ffmpeg...
ffmpeg -ss 00:30:17.08 -i "input.mkv" -t 00:07:41.12 -vcodec copy -acodec copy "output.mkv"
...then I get this:
Here's the ffmpeg -i for the original file:
And here's the ffmpeg -i for the new file (not very helpful):
Also, I tried removing the following line from profiles.xml:
<Matches container="matroska" mkvHeaderCompressed="true" />
When I do that, no transcoding is attempted, but then none of the MKVs will play, not even the original. I get "Not supported file format" after a long pause. So I leave this line in.
Is this a problem that Serviio can work around, or do I need to take it up with the mkvmerge developers, or am I doing something wrong...?
Thanks for taking a look, and let me know if you need more info.
MediaInfo tells me the only notable difference is that the original, playable MKV contains this info, which is not in the new, unplayable file:
Format settings, GOP : M=8, N=24
Here's an example of how I did the split (extracting a 7-minute segment to a separate file):
mkvmerge --split parts:30:17.08-37:58.2 -o "output.mkv" "input.mkv"
Like I said, input.mkv plays fine. output.mkv does not.
I used mkvmerge because ffmpeg has trouble demuxing MKVs. For example, if I try to do the split with ffmpeg...
ffmpeg -ss 00:30:17.08 -i "input.mkv" -t 00:07:41.12 -vcodec copy -acodec copy "output.mkv"
...then I get this:
- Code:
Input #0, matroska,webm, from 'input.mkv':
Metadata:
creation_time : 2012-11-10 19:18:27
Duration: 01:41:30.20, start: 0.000000, bitrate: 8779 kb/s
Stream #0:0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1(ita): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
Output #0, matroska, to 'output.mkv':
Metadata:
encoder : Lavf54.36.100
Stream #0:0: Video: h264, yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 1k tbn, 1k tbc
Stream #0:1(ita): Audio: ac3, 48000 Hz, stereo, 192 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[matroska @ 0000000005a575a0] pts (-880) < dts (-800) in stream 0
av_interleaved_write_frame(): Invalid argument
Here's the ffmpeg -i for the original file:
- Code:
ffmpeg version N-46469-gc995644 Copyright (c) 2000-2012 the FFmpeg developers
built on Nov 5 2012 17:58:15 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 5.100 / 52. 5.100
libavcodec 54. 71.100 / 54. 71.100
libavformat 54. 36.100 / 54. 36.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 21.106 / 3. 21.106
libswscale 2. 1.102 / 2. 1.102
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
Input #0, matroska,webm, from 'input.mkv':
Metadata:
creation_time : 2012-11-10 19:18:27
Duration: 01:41:30.20, start: 0.000000, bitrate: 8779 kb/s
Stream #0:0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1(ita): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
And here's the ffmpeg -i for the new file (not very helpful):
- Code:
[same config]
Input #0, matroska,webm, from 'output.mkv':
Metadata:
creation_time : 2012-11-11 06:28:30
Duration: 00:07:41.56, start: 0.000000, bitrate: 9845 kb/s
Stream #0:0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1(ita): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
Also, I tried removing the following line from profiles.xml:
<Matches container="matroska" mkvHeaderCompressed="true" />
When I do that, no transcoding is attempted, but then none of the MKVs will play, not even the original. I get "Not supported file format" after a long pause. So I leave this line in.
Is this a problem that Serviio can work around, or do I need to take it up with the mkvmerge developers, or am I doing something wrong...?
Thanks for taking a look, and let me know if you need more info.
