#253: invalid stream time_base for avi/aac, after av_write_header()
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Reporter: Andrew | Owner:
Type: defect | Status: open
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: avi aac after av_write_header stream | Blocked By:
time_base | Reproduced: 0
Blocking: |
Analyzed: 0 |
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Comment (by rhuddusa):
unfortunately, i don't have a public sample available right now, but when
i do, i will open a new ticket and attach a short sample
only other information i can add, is that if i do a ffmpeg with vcodec
copy, acodec copy, on my working AVI/ac3 6 channel file
[STREAM]
index=1
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
codec_type=audio
codec_time_base=0/1
codec_tag_string=[0] [0][0]
codec_tag=0x2000
sample_rate=48000.000000
channels=6
bits_per_sample=0
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/56000
start_time=0.000000
duration=N/A
nb_frames=303959040
[/STREAM]
the output is with format avi:
[STREAM]
index=1
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
codec_type=audio
codec_time_base=0/1
codec_tag_string=[0] [0][0]
codec_tag=0x2000
sample_rate=48000.000000
channels=6
bits_per_sample=0
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=4/125
start_time=0.000000
duration=2475.520000
nb_frames=77360
[/STREAM]
and the output is with format mov:
[STREAM]
index=1
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
codec_type=audio
codec_time_base=0/1
codec_tag_string=ac-3
codec_tag=0x332d6361
sample_rate=48000.000000
channels=6
bits_per_sample=0
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/48000
start_time=0.000000
duration=2453.248000
nb_frames=76664
[/STREAM]
so that's my theory that this is specific to avi, i get that
time_base=4/125, but works correctly under mov format where i get a
time_base=1/48000. i can't find a way to change the resulting avi
time_base value
but unfortunately, the xbox 360 only takes 6 channel audio with AVI and
ac3
sorry to complain without an actual test case ... i'll work on providing
one
--
Ticket URL: <http://avcodec.org/trac/ffmpeg/ticket/253#comment:8>
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