FFMPEG - Non-monotonous DTS
When I use FFMPEG to convert a video from MP4 to M3U8, using the following command,
ffmpeg -i op.mp4 -b:v 128k -flags -global_header -map 0:0 -map 0:1 -f segment -segment_time 4 -segment_list_size 0 -segment_list op.m3u8 -segment_format mpegts op%05d.ts
I get the below warning :
Non-monotonous DTS in output stream 0:1; previous: 347527, current: 346508; changing to 347528. This may result in incorrect timestamps in the output file.
The M3U8 is generated, but only audio is coming up on quicktime player.
Both the Sample MP4 and M3U8 are available here
So, I would like to know
Reason behind this error. Is it a corrupt mp4 or problem during conversion. The m3u8 is playable is not playable on quicktime properly. Only audio comes up, no video.
How can I possibly fix this
Complete FFMPEG Console Output :
ffmpeg version git-2013-06-06-c51654f Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 6 2013 12:54:24 with gcc 4.6.3 (GCC) 20120306 (Red Hat 4.6.3-2)
configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
libavutil 52. 35.100 / 52. 35.100
libavcodec 55. 15.100 / 55. 15.100
libavformat 55. 8.102 / 55. 8.102
libavdevice 55. 2.100 / 55. 2.100
libavfilter 3. 75.101 / 3. 75.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'op.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.8.102
Duration: 00:00:06.00, start: 0.010000, bitrate: 679 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 640x364 [SAR 1:1 DAR 160:91], 590 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s
Metadata:
handler_name : SoundHandler
[segment @ 0x32e1d60] Codec for stream 0 does not use global headers but container format requires global headers
[segment @ 0x32e1d60] Codec for stream 1 does not use global headers but container format requires global headers
Output #0, segment, to 'op%05d.ts':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.8.102
Stream #0:0(eng): Video: mpeg2video, yuv420p, 640x364 [SAR 1:1 DAR 160:91], q=2-31, 128 kb/s, 90k tbn, 25 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: mp2, 44100 Hz, stereo, s16, 128 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> mpeg2video)
Stream #0:1 -> #0:1 (aac -> mp2)
Press [q] to stop, [?] for help
[segment @ 0x32e1d60] Non-monotonous DTS in output stream 0:1; previous: 347527, current: 346508; changing to 347528. This may result in incorrect timestamps in the output file.
frame= 109 fps=0.0 q=31.0 size=N/A time=00:00:04.29 bitrate=N/A dup=14 drop=0 frame= 151 fps=0.0 q=24.8 Lsize=N/A time=00:00:06.00 bitrate=N/A dup=14 drop=0
video:350kB audio:96kB subtitle:0 global headers:0kB muxing overhead -100.004823%
With vsync and async options, the error that appears is "Codec for stream 0 does not use global headers but container format requires global headers". Here is the console output :
ffmpeg -i op.mp4 -b:v 128k -flags -global_header -map 0:0 -map 0:1 -f segment -segment_time 4 -segment_list_size 0 -segment_list nop.m3u8 -segment_format mpegts nop%05d.ts
ffmpeg version git-2013-06-06-c51654f Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 6 2013 12:54:24 with gcc 4.6.3 (GCC) 20120306 (Red Hat 4.6.3-2)
configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
libavutil 52. 35.100 / 52. 35.100
libavcodec 55. 15.100 / 55. 15.100
libavformat 55. 8.102 / 55. 8.102
libavdevice 55. 2.100 / 55. 2.100
libavfilter 3. 75.101 / 3. 75.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'op.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.8.102
Duration: 00:00:06.00, start: 0.010000, bitrate: 679 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 640x364 [SAR 1:1 DAR 160:91], 590 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s
Metadata:
handler_name : SoundHandler
[segment @ 0x3bf3d60] Codec for stream 0 does not use global headers but container format requires global headers
[segment @ 0x3bf3d60] Codec for stream 1 does not use global headers but container format requires global headers
Output #0, segment, to 'nop%05d.ts':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.8.102
Stream #0:0(eng): Video: mpeg2video, yuv420p, 640x364 [SAR 1:1 DAR 160:91], q=2-31, 128 kb/s, 90k tbn, 25 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: mp2, 44100 Hz, stereo, s16, 128 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> mpeg2video)
Stream #0:1 -> #0:1 (aac -> mp2)
Press [q] to stop, [?] for help
[segment @ 0x3bf3d60] Non-monotonous DTS in output stream 0:1; previous: 347527, current: 346508; changing to 347528. This may result in incorrect timestamps in the output file.
frame= 119 fps=0.0 q=31.0 size=N/A time=00:00:04.68 bitrate=N/A dup=14 drop=0 frame= 151 fps=0.0 q=24.8 Lsize=N/A time=00:00:06.00 bitrate=N/A dup=14 drop=0
video:350kB audio:96kB subtitle:0 global headers:0kB muxing overhead -100.004823%
Solution 1:
Your CSI clip converted with non-monotonous DTS message as well. I was able to play the MP4 clip okay in VLC, but ffplay hiccuped at the end. I'm not sure what that means.
ffmpeg -i op.mp4 -b:v 128k -flags -global_header -map 0:0 -map 0:1 -f segment -segment_time 4 -segment_list_size 0 -segment_list op.m3u8 -segment_format mpegts op%05d.ts
Just get a newer version of ffmpeg. Yours is from June 2013. Mine from March 2014 worked just fine. The mp4 plays fine for me on VLC. The individual .ts files played okay for me as well.
C:\temp>dir op*
Volume in drive C has no label.
Volume Serial Number is xxx-xxx
Directory of C:\temp
10/07/2014 08:52 PM 169 op.m3u8
10/07/2014 08:51 PM 509,425 op.mp4
10/07/2014 08:52 PM 404,764 op00000.ts
10/07/2014 08:52 PM 148,520 op00001.ts
4 File(s) 1,062,878 bytes
the op.m3u8 created the segment in 4 seconds increments until the file was completely processed.
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-ALLOW-CACHE:YES
#EXT-X-TARGETDURATION:5
#EXTINF:4.120000,
op00000.ts
#EXTINF:1.960000,
op00001.ts
#EXT-X-ENDLIST
Solution 2:
That mp4 is only 6 seconds long, and the audio stream is a different length than the video, I was able to sync the two and get rid of the DTS errors by doing the following though:
ffmpeg -i op.mp4 -ss 00:00:00.11 -t 00:00:06.00 -vn -y op.wav
ffmpeg -i op.mp4 -ss 0.010000 -t 00:00:06 -vcodec rawvideo -an -y op.avi
ffmpeg -i op.avi -i op.wav -b:v 590k -b:a 130k -t 00:00:06 -y op_fixed.mp4
This basically recreates the mp4 and fixes some minor corruption issues while making both streams the same length.
Also, your command line doesn't need the two -map parameters, and neither of the codecs from the original mp4 support global headers, besides which I don't imagine you'd need them anyway. The following should complete without errors after completing the steps I listed above:
ffmpeg -i op_fixed.mp4 -b:v 128k -f segment -segment_time 4 -segment_list_size 0 -segment_list op.m3u8 -segment_format mpegts op%05d.ts