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shaka-project / shaka-packager

A media packaging and development framework for VOD and Live DASH and HLS applications, supporting Common Encryption for Widevine and other DRM Systems.
https://shaka-project.github.io/shaka-packager/
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HEVC TS udp stream packaging problem #834

Closed sgorelyshev closed 6 months ago

sgorelyshev commented 4 years ago

System info

Operating System: Ubuntu 16.04.7 LTS Shaka Packager Version: 2.4.3

Issue and steps to reproduce the problem

Packager Command: packager 'in=udp://127.0.0.1:5055,stream=audio,init_segment=audio_init.mp4,segmenttemplate=audio$Number$.m4s' 'in=udp://127.0.0.1:5055,stream=video,init_segment=h265_1080p_init.mp4,segment_template=h2651080p$Number$.m4s' --mpd_output h264.mpd

Extra steps to reproduce the problem? create udp mpegts stream: 1) download h265 video sample(https://s3.amazonaws.com/senkorasic.com/test-media/video/caminandes-llamigos/caminandes_llamigos_1080p_hevc.mp4) 2) stream downloaded file over udp with ffmpeg: ffmpeg -re -i ~/Downloads/caminandes_llamigos_1080p_hevc.mp4 -vcodec copy -acodec copy -f mpegts "udp://127.0.0.1:5055"

What is the expected result? Packing starts(write video and audio segment files)

What happens instead? 1) 1st case. Starting packager before starting udp stream: Video and audio init files are created. Only segment audio files are written to disk, segment video files are not written. As I can see, the packer has detected only one keyframe at the start of the stream.

2) 2nd case. Starting packager after starting udp stream: Lots of warnings like: [0902/182442:WARNING:es_parser_h26x.cc(70)] Unusually large number of cached timestamps (243). As I can see, no one keyframe detected by packager. No files are written to the disc.

Additional Info: ffmpeg udp stream info(ffplay and vlc can play this stream): ffprobe -hide_banner udp://127.0.0.1:5055 Input #0, mpegts, from 'udp://127.0.0.1:5055': Duration: N/A, start: 1.462000, bitrate: N/A Program 1 Metadata: service_name : Service01 service_provider: FFmpeg Stream #0:0[0x100]: Video: hevc (Main) (HEVC / 0x43564548), yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 24 tbc Stream #0:10x101: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 162 kb/s

Questoin: Could you please clarify, if udp stream is incorrectly created, what should be present in stream for successful packaging?

cosmin commented 6 months ago

Input file to reproduce the problem is no longer available, if the problem can still be reproduced please reopen the issue and supply a new example file to reproduce.