tests/fate/mov: add a test for VFR muxing

tests/fate/mov.mak

@@ -218,6 +218,11 @@ fate-mov-pcm-remux: CMD = md5 -i $(TARGET_PATH)/tests/data/asynth-44100-1.wav -m
 fate-mov-pcm-remux: CMP = oneline
 fate-mov-pcm-remux: REF = e76115bc392d702da38f523216bba165
 
+FATE_MOV_FFMPEG-$(call TRANSCODE, RAWVIDEO, MOV, TESTSRC_FILTER SETPTS_FILTER) += fate-mov-vfr
+fate-mov-vfr: CMD = md5 -filter_complex testsrc=size=2x2:duration=1,setpts=N*N -c rawvideo -fflags +bitexact -f mov
+fate-mov-vfr: CMP = oneline
+fate-mov-vfr: REF = 1558b4a9398d8635783c93f84eb5a60d
+
 FATE_MOV_FFMPEG_FFPROBE-$(call TRANSCODE, FLAC, MOV, WAV_DEMUXER PCM_S16LE_DECODER) += fate-mov-mp4-iamf-stereo
 fate-mov-mp4-iamf-stereo: tests/data/asynth-44100-2.wav tests/data/streamgroups/audio_element-stereo tests/data/streamgroups/mix_presentation-stereo
 fate-mov-mp4-iamf-stereo: SRC = $(TARGET_PATH)/tests/data/asynth-44100-2.wav