avdevice live input always buffers and freezes

wang-bin / QtAV

A cross-platform multimedia framework based on Qt and FFmpeg. 基于Qt和FFmpeg的跨平台高性能音视频播放框架. Recommand to use new sdk https://github.com/wang-bin/mdk-sdk

http://qtav.org

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avdevice live input always buffers and freezes #519

Open sherpya opened 9 years ago

sherpya commented 9 years ago

I'm trying to capture from a dv source using dshow (but the same problem applies to other os/inputs) QML Player says

buffering -> buffered -> plays some frames -> freezes 1 sec -> buffering -> etc

I have same problems in qml, with qtav 1.6.0 insteads shutters after a while but it does not resync

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wang-bin commented 9 years ago

it's similar to #501 Try player->setBufferValue(1)

sherpya commented 9 years ago

looks ok on 1.6.0, but I get framedrops on master (perhaps without visible effects)

[FFmpeg:dshow] real-time buffer [AV/C Tape Recorder/Player] [video input] too full or near too full (71% of size: 3041280 [rtbufsize parameter])! frame dropped!

khanhlv1407 commented 7 years ago

Dear wang-bin, We got same problem.

When we play h264 stream from ip camera, it is OK, except the latency (~1.6s) --_ this is another issue.
When we play mjpeg stream from ip camera, it only can show several frames, after that it always in buffering status (buffering --> buffered --> buffering --> buffered) --> ??? Could you suggest the solution to solve mjpeg stream?

Note: - we use qtav v1.11, ffmpeg (decoder)

if we play mjpeg stream by ffplay, it is no problem.
We tried "player->setBufferValue(1)" but it does not help