No PTS in this audio PES packet

[liquid8d]

I receive 'No PTS in this audio PES packet' when trying to access the following stream:

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/master.m3u8

Here is the master.m3u8 details:

EXTM3U

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=198000,RESOLUTION=480x270,CODECS="avc1.66.30, mp4a.40.2"

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/index_150_av-p.m3u8?sd=10&rebase=on

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=678000,RESOLUTION=768x432,CODECS="avc1.77.30, mp4a.40.2"

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/index_550_av-p.m3u8?sd=10&rebase=on

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2320000,RESOLUTION=1280x720,CODECS="avc1.77.30, mp4a.40.2"

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/index_2000_av-p.m3u8?sd=10&rebase=on

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=48000,CODECS="mp4a.40.2"

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/index_150_a-p.m3u8?sd=10&rebase=on

Here is part of one quality specific m3u8:

EXTM3U

EXT-X-TARGETDURATION:10

EXT-X-ALLOW-CACHE:YES

EXT-X-VERSION:3

EXT-X-MEDIA-SEQUENCE:139450279

EXTINF:6.948,

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/segment139450279_2000_av-p.ts?sd=10&rebase=on

EXTINF:10.000,

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/segment139450280_2000_av-p.ts?sd=10&rebase=on

EXTINF:10.000,

http://player.livestream-f.akamaihd.net/i/6388794_1191932_718f2346_1@156550/segment139450281_2000_av-p.ts?sd=10&rebase=on

If you need additional information, please let me know!

[dangerden]

Well, it means that streams are not really good. Without PTS data there is no way to synchronize several streams. Please check what happened to PTS data.

[liquid8d]

Admittedly, this is a bit over my head. I read a bit about it here:
http://dranger.com/ffmpeg/tutorial05.html

How can I verify if PTS data exists in the stream? If it does not exist, how do VLC or ffmpeg play the stream correctly with synchronized audio?

[dangerden]

I don't think they do dynamic bitrate switching.

How do you prepare your content? Where it comes from?

On 11 Mar 2014, at 07:14, liquid8d [email protected] wrote:

Admittedly, this is a bit over my head. I read a bit about it here:
http://dranger.com/ffmpeg/tutorial05.html

How can I verify if PTS data exists in the stream? If it does not exist, how do VLC or ffmpeg play the stream correctly with synchronized audio?

—
Reply to this email directly or view it on GitHub.

[liquid8d]

They do handle both handle dynamic bitrate switching (although not always very well for VLC), but I should also mention the same problem occurs if I try playing a specific bitrate m3u8 from the master file.

This is not my stream, but these are the details from ffmpeg:
Metadata:
broadcasting_app: Livestream Studio 500
operation_system: Windows
author : 112881
copyright :
description :
keywords :
rating :
title :
presetname : Custom
creationdate : 2014.03.10-07:59:53
videodevice :
avcprofile : 66
avclevel : 31
videokeyframe_frequency: 2
audiodevice :
audiochannels : 2
audioinputvolume: 100
streamIdentifier: 5F5C78
Duration: 02:00:31.59, start: 0.000000, bitrate: 2375 kb/s
Stream #0:0: Video: h264 (Main), yuv420p, 1280x720, 2048 kb/s, 30.33 fps, 29.97 tbr, 1k tbn, 59.94 tbc
Stream #0:1: Audio: aac, 48000 Hz, stereo, fltp, 327 kb/s
Stream #0:2: Data: none

[dangerden]

Probably we could leave it to the decoder. Maybe it will make your streams work. Missing PTS in an audio stream is a warning that the stream wasn't prepared properly.

[liquid8d]

Thanks for the help.. sorry, I actually posted the wrong information (wrong format).. with ffmpeg using m3u8:

[h264 @ 0000000003ecd680] non-existing PPS referenced
[h264 @ 0000000003ecd680] non-existing PPS 0 referenced
[h264 @ 0000000003ecd680] decode_slice_header error
[h264 @ 0000000003ecd680] no frame!
[h264 @ 0000000003ecd680] non-existing SPS 0 referenced in buffering period
Last message repeated 1 times
[h264 @ 00000000051e73a0] non-existing PPS referenced
[h264 @ 00000000051e73a0] non-existing PPS 0 referenced
[h264 @ 00000000051e73a0] decode_slice_header error
[h264 @ 00000000051e73a0] no frame!
[h264 @ 00000000051e73a0] non-existing PPS referenced
[h264 @ 00000000051e73a0] non-existing PPS 0 referenced
[h264 @ 00000000051e73a0] decode_slice_header error
[h264 @ 00000000051e73a0] no frame!
[h264 @ 00000000051e73a0] non-existing PPS referenced
[h264 @ 00000000051e73a0] non-existing PPS 0 referenced
[h264 @ 00000000051e73a0] decode_slice_header error
[h264 @ 00000000051e73a0] no frame!
[h264 @ 00000000051e73a0] non-existing SPS 0 referenced in buffering period
Last message repeated 1 times
[h264 @ 0000000003f0eb80] non-existing PPS referenced
[h264 @ 0000000003f0eb80] non-existing PPS 0 referenced
[h264 @ 0000000003f0eb80] decode_slice_header error
[h264 @ 0000000003f0eb80] no frame!
[h264 @ 0000000003f0eb80] non-existing SPS 0 referenced in buffering period
Last message repeated 1 times
[h264 @ 00000000049dd500] non-existing SPS 0 referenced in buffering period
[h264 @ 00000000051c25c0] non-existing SPS 0 referenced in buffering period
[hls,applehttp @ 0000000003e1e140] Estimating duration from bitrate, this may be
inaccurate
Input #0, hls,applehttp, from 'http://player.livestream-f.akamaihd.net/i/6388794
_1191932_718f2346_1@156550/master.m3u8':
Duration: 00:00:00.02, start: 77234.666333, bitrate: 286 kb/s
Program 0
Metadata:
variant_bitrate : 198000
Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yu
v420p, 480x270, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Metadata:
variant_bitrate : 198000
Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 22050 Hz, stereo, fltp, 49
kb/s
Metadata:
variant_bitrate : 198000
Stream #0:2: Data: timed_id3 (ID3 / 0x20334449)
Metadata:
variant_bitrate : 198000
Program 1
Metadata:
variant_bitrate : 678000
Stream #0:3: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 768x432,
29.97 tbr, 90k tbn, 59.94 tbc
Metadata:
variant_bitrate : 678000
Stream #0:4: Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 13
0 kb/s
Metadata:
variant_bitrate : 678000
Stream #0:5: Data: timed_id3 (ID3 / 0x20334449)
Metadata:
variant_bitrate : 678000
Program 2
Metadata:
variant_bitrate : 2320000
Stream #0:6: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1280x720,
29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Metadata:
variant_bitrate : 2320000
Stream #0:7: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 32
2 kb/s
Metadata:
variant_bitrate : 2320000
Stream #0:8: Data: timed_id3 (ID3 / 0x20334449)
Metadata:
variant_bitrate : 2320000
Program 3
Metadata:
variant_bitrate : 48000
Stream #0:9: Audio: aac ([15][0][0][0] / 0x000F), 22050 Hz, stereo, fltp, 49
kb/s
Metadata:
variant_bitrate : 48000
Stream #0:10: Data: timed_id3 (ID3 / 0x20334449)
Metadata:
variant_bitrate : 48000

I'm not sure if this would help, but here is the information provided after retrieving some of the stream:

[libx264 @ 00000000054005c0] frame I:6 Avg QP:16.09 size: 76148
[libx264 @ 00000000054005c0] frame P:282 Avg QP:20.90 size: 10097
[libx264 @ 00000000054005c0] frame B:612 Avg QP:25.37 size: 1241
[libx264 @ 00000000054005c0] consecutive B-frames: 8.3% 2.2% 2.3% 87.1%
[libx264 @ 00000000054005c0] mb I I16..4: 28.3% 42.6% 29.1%
[libx264 @ 00000000054005c0] mb P I16..4: 1.3% 1.5% 0.2% P16..4: 26.6% 7.5% 5.1% 0.0% 0.0% skip:57.8%
[libx264 @ 00000000054005c0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 27.0% 0.6% 0.1% direct: 0.3% skip:71.9% L0:42.3% L1:55.6% BI: 2.1%
[libx264 @ 00000000054005c0] 8x8 transform intra:46.8% inter:55.3%
[libx264 @ 00000000054005c0] coded y,uvDC,uvAC intra: 48.2% 46.0% 21.7% inter: 5.3% 5.5% 0.5%
[libx264 @ 00000000054005c0] i16 v,h,dc,p: 56% 14% 10% 20%
[libx264 @ 00000000054005c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 20% 32% 3% 3% 4% 4% 4% 5%
[libx264 @ 00000000054005c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 24% 14% 5% 6% 6% 6% 6% 5%
[libx264 @ 00000000054005c0] i8c dc,h,v,p: 39% 20% 31% 11%
[libx264 @ 00000000054005c0] Weighted P-Frames: Y:1.1% UV:0.0%
[libx264 @ 00000000054005c0] ref P L0: 73.4% 8.4% 14.7% 3.4% 0.1%
[libx264 @ 00000000054005c0] ref B L0: 93.8% 5.4% 0.8%
[libx264 @ 00000000054005c0] ref B L1: 95.4% 4.6%
[libx264 @ 00000000054005c0] kb/s:1082.64

[dangerden]

As you may see ffmpeg also refers to missing PPS. We will make a plugin which doesn't check PTS availability and you will check whether it is capable to handle the stream.