Within the time for perfecting the appeal, an appellant who is unable to pay for the appellate record may, by motion and affidavit, ask the trial court to have the appellate record furnished without charge. If after hearing the motion the court finds that the appellant cannot pay or give security for the appellate record, the court must order the reporter to transcribe the proceedings. When the court certifies that the appellate record has been furnished to the appellant, the reporter must be paid from the general funds of the county in which the offense was committed, in the amount set by the trial court.