[FFmpeg-trac] #8228(ffprobe:new): ffprobe -show_entries side_data creates invalid JSON

FFmpeg trac at avcodec.org
Tue Oct 8 04:32:35 EEST 2019


#8228: ffprobe -show_entries side_data creates invalid JSON
-------------------------------------+-------------------------------------
             Reporter:  Loomes       |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:  ffprobe      |                  Version:  4.2
             Keywords:  ffrpobe,     |               Blocked By:
  JSON, side_data                    |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: I tried to get a JSON from ffprobe to get sidedata
 information from several video files, but it seems the generated JSON ist
 malformed and therefore not convenient for further processing. My command:
 {{{
 ffprobe -read_intervals %+#2 -select_streams v:0 -show_frames
 -show_entries side_data "source.mkv" -print_format json -of json >
 "source_sidedata.json"
 }}}
 ffmpeg version: ffmpeg-20191004-e6625ca-win64-static
 <http://ffmpeg.zeranoe.com/builds/>
 The resulting JSON files always looks like
 {{{
 {
     "packets_and_frames": [
         {
             "type": "packet",

         },
         {
             "type": "packet",

         },
         {
             "type": "frame",
             "media_type": "audio",
             "stream_index": 1,
             "key_frame": 1,
             "pkt_pts": 171,
             "pkt_pts_time": "0.171000",
             "pkt_dts": 171,
             "pkt_dts_time": "0.171000",
             "best_effort_timestamp": 171,
             "best_effort_timestamp_time": "0.171000",
             "pkt_duration": 21,
             "pkt_duration_time": "0.021000",
             "pkt_pos": "313258",
             "pkt_size": "1522",
             "sample_fmt": "fltp",
             "nb_samples": 1024,
             "channels": 6,
             "channel_layout": "5.1"
         },
 [...]
 }}}
 Obviously the problem is the comma which is always set after the last line
 ""type": "packet" in the "packets_and_frames" section. ffprobe usually
 gives me proper JSON files but the comma problem appears when
 "-show_entries side_data" is used.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8228>
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