[FFmpeg-trac] #5388(avformat:new): Audio Stream Specifier Need to Change for MP2 & MP3
FFmpeg
trac at avcodec.org
Wed Mar 30 14:21:10 CEST 2016
#5388: Audio Stream Specifier Need to Change for MP2 & MP3
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Reporter: smallishzulu | Owner:
Type: defect | Status: new
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: mpegts | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by smallishzulu):
Simple; when I encode with below command line;
ffmpeg -i input.ts -vcodec mpeg2video -vb 2500k -acodec mp2 -ab 128k
-muxrate 3000k -f mpegts output.ts
Audio Specifier is 0x03 and when I playout the TS file in SD STBs most of
them is OK. But 2 STBs;
a) Pace SD STBs has no audio.
b) Vestel 9200 STBs has audio decode delay.
If I change stream specifier to 0x04, these STBs also play audio
correctly.
I discussed this issue with manufacturer engineers and learned that they
define decoding codec based on specifier, so it cause problem with MPEG 1
audio decoder via 0x03. When 0x04 is set, MPEG 2 Audio decoder is set and
no problems occured.
Thats the all story.
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Ticket URL: <https://trac.ffmpeg.org/ticket/5388#comment:8>
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