MP4Box throws error when attempting to add rescaler to live stream.

[alex-rsk]

[x] I looked for a similar issue and couldn't find any.
[x] I tried with the latest version of GPAC.
[x] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ... etc).
Greetings.

My goal now is, to add different representations with different bitrate to live mpeg-dash.
I'm feeding chunks one by one, calling MP4Box for each, making live stream.

To achieve this I'm trying:

MP4Box -dash 10000   \
     -dash-ctx /dev/shm/broadcast/context.txt  \
     -profile dashavc264:live  \
     --utcs="https://time.akamai.com/?iso&ms" \
     -mpd-refresh 2 -dynamic -bs-switching no \
     -segment-timeline \
     -url-template \
     -insert-utc  \
     -min-buffer 15 \
     -time-shift 30  \
/dev/shm/broadcast/input.mp4#video:@ffsws:osize=160x120@enc:c=avc:b=100k:#Representation=1@@ffsws:osize=320x240@enc:c=avc:b=200k:#Representation=2  \
/dev/shm/broadcast/input.mp4#audio \
-out  /dev/shm/broadcast/manifest.mpd 

The first run of MP4Box is successfull, but the next run of MPEG_DASH with same command line fails

[2024-06-11 16:43:46] local.DEBUG: 4011: [Dasher] No template assigned, using $File$_dash$FS$$Time$
[FFSWS] Converting from 640x480@yuv420 to 160x120@yuv420                                                                              
[FFSWS] Setup rescaler from 640x480 fmt yuv420 to 160x120 fmt yuv420                                                                  
[FFSWS] Converting from 640x480@yuv420 to 320x240@yuv420                                                                              
[FFSWS] Setup rescaler from 640x480 fmt yuv420 to 320x240 fmt yuv420                                                                  
[FFSWS] Converting from 640x480@yuv420 to 160x120@yuv420                                                                              
[FFSWS] Setup rescaler from 640x480 fmt yuv420 to 160x120 fmt yuv420                                                                  
[FFSWS] Converting from 640x480@yuv420 to 320x240@yuv420                                                                              
[FFSWS] Setup rescaler from 640x480 fmt yuv420 to 320x240 fmt yuv420                                                                  
[AVC|H264] Possible Variable Frame Rate: VUI "fixed_frame_rate_flag" absent                                                           
[AVC|H264] Possible Variable Frame Rate: VUI "fixed_frame_rate_flag" absent                                                           
[Dasher] Synchronized clock to remote https://time.akamai.com/?iso&ms - UTC diff (local - remote) 6 ms                                
[Dasher] Input /dev/shm/broadcast/input.mp4: max audio duration 9935/1000 in the period is less than duration 10000/1000, clamping will happen                                                                                                                   
[Dasher] Input /dev/shm/broadcast/input.mp4: max audio duration 9935/1000 in the period is less than duration 10000/1000, clamping will happen                                                                                                                   
No filter chain found for PID V1 in filter dasher to any loaded filters - NOT CONNECTED                                               
No filter chain found for PID A2 in filter dasher to any loaded filters - NOT CONNECTED                                               
Filters not connected:                                                                                                                
fout (dst=/dev/shm/broadcast/input_dashinit_rep2.mp4:gfopt:segdur=10000/1000:tpl:stl:dynamic:reschedule:ntp=yes:bs_switch=off:profile=dashavc264.live:buf=1500:!check_dur:tsb=30:
refresh=2:state=/dev/shm/broadcast/context.txt:loop:_p_gentime=0x580a7557d388:_p_mpdtime=0x580a7557d390:pssh=v:subs_sidx=0:noinit:frag:xps_inband=no:nofragdef:psshs=moov:mime=�,~�X::title=Test) (idx=14) 
                                                                                                                                      
double free or corruption (!prev)                                                                                                     
Aborted (core dumped)

[jeanlf]

Now fixed, thanks for the report.

[alex-rsk]

Thank you very much!!