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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000373||eac3to||bug||public||2015-12-29 16:39||2016-11-24 02:50|
|Priority||normal||Severity||minor||Reproducibility||have not tried|
|Summary||0000373: AC3 encoder delay|
|Description||Hi, a some time ago I found that AC3 encoder in eac3to produces some delay in output file. With comparison in Audacity it can be compensated by adding -5ms to command line (produced AC3 will be still 16 samples at 48 kHz behind the original source).|
|Steps To Reproduce||Take some sound file. Encode it to AC3. Decode it to FLAC. Open in Audacity and compare waveform.|
|Tags||No tags attached.|
delay.zip (927,678 bytes)
All encoders, even commercial ones, produce a delay in output because need initialize the soft and send a initial silence before send the input audio.
AC3 encoders send 256 PCM samples of silence, at samplerate 48000 is 5.333... ms
A workaround using Aften encoder is use the parameter -pad 0, but don't know a equivalence using ffmpeg.
BTW the problem is not related with eac3to but with each encoder.