[Mlt-devel] bug in consumer_avformat ?

Marco Gittler Mon, 09 Jan 2012 13:41:21 -0800

Hi

i try since some days to render a few files (avchd), but the render does stops every time nearly the same frame. Also a partial render some frames before this part will hang and nothing happens.


1. is this normal that mlt uses up to 3 GB Ram for 20 min avchd video ?
2. after some debug and look at the code, i found this output

[consumer avformat]  frame_size 1024

[consumer avformat] audio pts 48000 (0,533333) video pts 46800 (0,520000) <------- this part !!

[producer avformat] /home/marco/Desktop/hd-video/ostsee_peenemünde/00278.MTS
    mlt_service_cache_get: name producer_avformat object 0x6064800
mlt_cache_get: get 5 = 0x6064800, 0xaa383e0
[consumer avformat] worker processing index = 23 frame 87 queue count = 24
[producer avformat] /home/marco/Desktop/hd-video/ostsee_peenemünde/00278.MTS
    pkt.dts 533301 req_pos 274 cur_pos 273 pkt_pos 274
[producer avformat] /home/marco/Desktop/hd-video/ostsee_peenemünde/00278.MTS
     got_pic 0 key 0
[producer avformat] /home/marco/Desktop/hd-video/ostsee_peenemünde/00278.MTS
    pkt.dts 535101 req_pos 274 cur_pos 273 pkt_pos 275
[producer avformat] /home/marco/Desktop/hd-video/ostsee_peenemünde/00278.MTS
     got_pic 368 key 0

cache_object_close: item 0x7f23a4e0ed90 object 0x7f data 0x7f239ad64020 refcount 1

mlt_cache_put: put 9 = 0x89, 0x7f23842df020
TFF in 1 out 0
[consumer avformat] waiting in worker index = 24 queue count = 24

[libx264 @ 0xae1e410] frame= 14 QP=28,38 NAL=0 Slice:B Poc:26 I:110 P:6557 SKIP:1493 size=67068 bytes

[consumer avformat] video pkt pts 46800 frame pts 13 frame_size 0

cache_object_close: item 0x60673c0 object 0x6064800 data 0xaa383e0 refcount 26

[consumer avformat] audio pts 48000 (0,533333) video pts 50400 (0,560000)
[consumer avformat]  frame_size 1024
[consumer avformat] audio pts 49920 (0,554667) video pts 50400 (0,560000)
Current Position:         63

and in consumer_avformat.c:

        while ( 1 )
        {
            // Write interleaved audio and video frames

if ( !video_st || ( video_st && audio_st[0] && audio_pts < video_pts ) )

            {
            ...
            }
        }

this will explain the endless loop (audio_pts > video_pts)

this is the first time, that i have such issue. the file is original from the camera.


should this be fixed in mlt ?
looks like a bug to me, or better fix the file ?

regards marco (i hope i can reproduce this with the file only and not just with kdenlive project for better testing)

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[Mlt-devel] bug in consumer_avformat ?

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